introduced ModuleRegistry to easy inter-module dependencies

backend/src/main/java/de/srsoftware/umbrella/backend/Application.java

@@ -10,13 +10,13 @@ import de.srsoftware.configuration.JsonConfig;
 import de.srsoftware.tools.ColorLogger;
 import de.srsoftware.umbrella.bookmarks.BookmarkApi;
 import de.srsoftware.umbrella.company.CompanyModule;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.Util;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.documents.DocumentApi;
 import de.srsoftware.umbrella.items.ItemApi;
 import de.srsoftware.umbrella.legacy.LegacyApi;
 import de.srsoftware.umbrella.markdown.MarkdownApi;
-import de.srsoftware.umbrella.message.MessageApi;
 import de.srsoftware.umbrella.message.MessageSystem;
 import de.srsoftware.umbrella.notes.NoteModule;
 import de.srsoftware.umbrella.project.ProjectModule;
@@ -57,23 +57,24 @@ public class Application {
 
 		config.get("umbrella.plantuml").map(Object::toString).map(File::new).filter(File::exists).ifPresent(Util::setPlantUmlJar);
 
-		var translationModule = new Translations();
-		var messageSystem     = new MessageSystem(translationModule,config);
 		var server            = HttpServer.create(new InetSocketAddress(port), 0);
 
-		var userModule        = new UserModule(config,messageSystem);
-		var tagModule         = new TagModule(config,userModule);
-		var bookmarkApi       = new BookmarkApi(config,tagModule);
-		var companyModule     = new CompanyModule(config, userModule);
-		var documentApi       = new DocumentApi(companyModule, translationModule, config);
-		var itemApi           = new ItemApi(config,companyModule);
-		var legacyApi         = new LegacyApi(userModule.userDb(),config);
-		var markdownApi       = new MarkdownApi(userModule);
-		var messageApi        = new MessageApi(messageSystem);
-		var notesModule       = new NoteModule(config,userModule);
-		var projectModule     = new ProjectModule(config,companyModule,tagModule);
-		var taskModule        = new TaskModule(config,projectModule,tagModule,notesModule);
-		var timeModule	      = new TimeModule(config,taskModule);
+		var registry          = new ModuleRegistry();
+		var translationModule = new Translations(registry);
+		var postBox           = new MessageSystem(registry,config);
+
+		var userModule        = new UserModule(registry,config);
+		var tagModule         = new TagModule(registry,config);
+		var bookmarkApi       = new BookmarkApi(registry,config);
+		var companyModule     = new CompanyModule(registry, config);
+		var documentApi       = new DocumentApi(registry, config);
+		var itemApi           = new ItemApi(registry, config);
+		var legacyApi         = new LegacyApi(registry,config);
+		var markdownApi       = new MarkdownApi(registry);
+		var notesModule       = new NoteModule(registry,config);
+		var projectModule     = new ProjectModule(registry, config);
+		var taskModule        = new TaskModule(registry, config);
+		var timeModule	      = new TimeModule(registry, config);
 		var webHandler        = new WebHandler();
 
 		bookmarkApi      .bindPath("/api/bookmark")    .on(server);
@@ -81,7 +82,6 @@ public class Application {
 		companyModule    .bindPath("/api/company")     .on(server);
 		itemApi			 .bindPath("/api/items")       .on(server);
 		markdownApi		 .bindPath("/api/markdown")    .on(server);
-		messageApi       .bindPath("/api/messages")    .on(server);
 		notesModule      .bindPath("/api/notes")       .on(server);
 		projectModule    .bindPath("/api/project")     .on(server);
 		tagModule        .bindPath("/api/tags")        .on(server);

bookmark/src/main/java/de/srsoftware/umbrella/bookmarks/BookmarkApi.java

@@ -14,8 +14,8 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
-import de.srsoftware.umbrella.core.api.TagService;
-import de.srsoftware.umbrella.core.api.UserService;
+import de.srsoftware.umbrella.core.ModuleRegistry;
+import de.srsoftware.umbrella.core.api.BookmarkService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Token;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
@@ -24,16 +24,14 @@ import java.util.ArrayList;
 import java.util.Optional;
 import org.json.JSONArray;
 
-public class BookmarkApi extends BaseHandler {
+public class BookmarkApi extends BaseHandler implements BookmarkService {
 	private final BookmarkDb db;
-	private final UserService users;
-	private final TagService tags;
+	private final ModuleRegistry registry;
 
-	public BookmarkApi(Configuration config, TagService tagService) {
+	public BookmarkApi(ModuleRegistry registry, Configuration config) {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		db = new SqliteDb(connect(dbFile));
-		tags = tagService;
-		users = tagService.userService();
+		this.registry = registry.add(this);
 	}
 
 	@Override
@@ -41,7 +39,7 @@ public class BookmarkApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -61,7 +59,7 @@ public class BookmarkApi extends BaseHandler {
 
 	private boolean getBookmark(UmbrellaUser user, long id, HttpExchange ex) throws IOException {
 		var bookmark = db.load(id,user.id());
-		tags.getTags(BOOKMARK, id, user).forEach(bookmark.tags()::add);
+		registry.tagService().getTags(BOOKMARK, id, user).forEach(bookmark.tags()::add);
 		return sendContent(ex,bookmark);
 	}
 
@@ -70,7 +68,7 @@ public class BookmarkApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -117,7 +115,7 @@ public class BookmarkApi extends BaseHandler {
 
 		if (json.has(TAGS) && json.get(TAGS) instanceof JSONArray tagList){
 			var list = tagList.toList().stream().map(Object::toString).toList();
-			tags.save(BOOKMARK,bookmark.urlId(), userList, list);
+			registry.tagService().save(BOOKMARK,bookmark.urlId(), userList, list);
 		}
 		return sendContent(ex,bookmark);
 	}

company/src/main/java/de/srsoftware/umbrella/company/CompanyModule.java

@@ -14,8 +14,8 @@ import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.company.api.CompanyDb;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.CompanyService;
-import de.srsoftware.umbrella.core.api.UserService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
 import java.io.IOException;
@@ -23,13 +23,13 @@ import java.util.*;
 
 public class CompanyModule extends BaseHandler implements CompanyService {
 
-	private final UserService users;
 	private final CompanyDb companyDb;
+	private final ModuleRegistry registry;
 
-	public CompanyModule(Configuration config, UserService userService) throws UmbrellaException {
+	public CompanyModule(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		companyDb = new SqliteDb(connect(dbFile));
-		users = userService;
+		this.registry = registry.add(this);
 	}
 
 	@Override
@@ -37,7 +37,7 @@ public class CompanyModule extends BaseHandler implements CompanyService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head){
@@ -55,7 +55,7 @@ public class CompanyModule extends BaseHandler implements CompanyService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -74,7 +74,7 @@ public class CompanyModule extends BaseHandler implements CompanyService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -102,7 +102,7 @@ public class CompanyModule extends BaseHandler implements CompanyService {
 	@Override
 	public Collection<UmbrellaUser> getMembers(long companyId) throws UmbrellaException {
 		var members = new HashSet<UmbrellaUser>();
-		for (var userId : companyDb.getMembers(companyId)) members.add(users.loadUser(userId));
+		for (var userId : companyDb.getMembers(companyId)) members.add(registry.userService().loadUser(userId));
 		return members;
 	}
 
@@ -120,7 +120,7 @@ public class CompanyModule extends BaseHandler implements CompanyService {
 		var userMap = new HashMap<Long,UmbrellaUser>();
 		for (var company : companyList){
 			for (var userId : companyDb.getMembers(company.id())){
-				var user = userMap.computeIfAbsent(userId,k -> users.loadUser(userId));
+				var user = userMap.computeIfAbsent(userId,k -> registry.userService().loadUser(userId));
 				company.members().put(userId,user);
 			}
 		}
@@ -166,9 +166,4 @@ public class CompanyModule extends BaseHandler implements CompanyService {
 		companyDb.addUser(company.id(),user.id());
 		return sendContent(ex,company);
 	}
-
-	@Override
-	public UserService userService() {
-		return users;
-	}
 }

core/src/main/java/de/srsoftware/umbrella/core/ModuleRegistry.java

@@ -0,0 +1,121 @@
+/* © SRSoftware 2025 */
+package de.srsoftware.umbrella.core;
+
+import de.srsoftware.umbrella.core.api.*;
+
+public class ModuleRegistry {
+	private Translator translator;
+	private PostBox postBox;
+	private UserService userService;
+	private TagService tagService;
+	private BookmarkService bookmarkService;
+	private CompanyService companyService;
+	private DocumentService documentService;
+	private ItemService itemService;
+	private MarkdownService markdownService;
+	private NoteService noteService;
+	private ProjectService projectService;
+	private TaskService taskService;
+	private TimeService timeService;
+
+	public ModuleRegistry add(BookmarkService bookmarkService) {
+		this.bookmarkService = bookmarkService;
+		return this;
+	}
+
+	public ModuleRegistry add(CompanyService companyService) {
+		this.companyService = companyService;
+		return this;
+	}
+
+	public ModuleRegistry add(DocumentService documentService) {
+		this.documentService = documentService;
+		return this;
+	}
+
+	public ModuleRegistry add(ItemService itemService) {
+		this.itemService = itemService;
+		return this;
+	}
+
+	public ModuleRegistry add(MarkdownService markdownService) {
+		this.markdownService = markdownService;
+		return this;
+	}
+
+	public ModuleRegistry add(NoteService noteService) {
+		this.noteService = noteService;
+		return this;
+	}
+
+	public ModuleRegistry add(PostBox postBox) {
+		this.postBox = postBox;
+		return this;
+	}
+
+	public ModuleRegistry add(ProjectService projectService) {
+		this.projectService = projectService;
+		return this;
+	}
+
+	public ModuleRegistry add(TagService tagService) {
+		this.tagService = tagService;
+		return this;
+	}
+
+	public ModuleRegistry add(TaskService taskService) {
+		this.taskService = taskService;
+		return this;
+	}
+
+	public ModuleRegistry add(TimeService timeService) {
+		this.timeService = timeService;
+		return this;
+	}
+
+	public ModuleRegistry add(Translator translator) {
+		this.translator = translator;
+		return this;
+	}
+
+	public ModuleRegistry add(UserService userService) {
+		this.userService = userService;
+		return this;
+	}
+
+	public CompanyService companyService(){
+		return companyService;
+	}
+
+	public DocumentService documentService(){
+		return documentService;
+	}
+
+	public NoteService noteService(){
+		return noteService;
+	}
+
+	public PostBox postBox() {
+		return postBox;
+	}
+
+	public ProjectService projectService(){
+		return projectService;
+	}
+
+	public TagService tagService(){
+		return tagService;
+	}
+
+	public TaskService taskService(){
+		return taskService;
+	}
+
+	public Translator translator(){
+		return translator;
+	}
+
+	public UserService userService(){
+		return userService;
+	}
+}

core/src/main/java/de/srsoftware/umbrella/core/api/CompanyService.java

@@ -15,6 +15,4 @@ public interface CompanyService {
 	Map<Long,Company> listCompaniesOf(UmbrellaUser user) throws UmbrellaException;
 
 	boolean membership(long companyId, long userId) throws UmbrellaException;
-
-	UserService userService();
 }

core/src/main/java/de/srsoftware/umbrella/core/api/DocumentService.java

@@ -0,0 +1,5 @@
+/* © SRSoftware 2025 */
+package de.srsoftware.umbrella.core.api;
+
+public interface DocumentService {
+}

core/src/main/java/de/srsoftware/umbrella/core/api/ItemService.java

@@ -0,0 +1,5 @@
+/* © SRSoftware 2025 */
+package de.srsoftware.umbrella.core.api;
+
+public interface ItemService {
+}

core/src/main/java/de/srsoftware/umbrella/core/api/MarkdownService.java

@@ -0,0 +1,5 @@
+/* © SRSoftware 2025 */
+package de.srsoftware.umbrella.core.api;
+
+public interface MarkdownService {
+}

core/src/main/java/de/srsoftware/umbrella/core/api/ProjectService.java

@@ -8,7 +8,6 @@ import java.util.List;
 import java.util.Map;
 
 public interface ProjectService {
-	CompanyService companyService();
 	Map<Long,Project> listCompanyProjects(long companyId, boolean includeClosed) throws UmbrellaException;
 	Map<Long,Project> listUserProjects(long userId, boolean includeClosed) throws UmbrellaException;
 	Project load(long projectId);

core/src/main/java/de/srsoftware/umbrella/core/api/TagService.java

@@ -13,6 +13,4 @@ public interface TagService {
 	void save(String module, long entityId, Collection<Long> userIds, Collection<String> tags);
 
 	String save(String module, long entityId, Collection<Long> userIds, String tag);
-
-	UserService userService();
 }

core/src/main/java/de/srsoftware/umbrella/core/api/TaskService.java

@@ -8,7 +8,6 @@ import java.util.HashMap;
 import java.util.List;
 
 public interface TaskService {
-	CompanyService   companyService();
 	HashMap<Long, Task> listCompanyTasks(long companyId) throws UmbrellaException;
 	HashMap<Long, Task> listProjectTasks(long projectId) throws UmbrellaException;
 	Collection<Task> loadMembers(Collection<Task> tasks);
@@ -16,7 +15,4 @@ public interface TaskService {
 		loadMembers(List.of(task));
 		return task;
 	}
-	ProjectService   projectService();
-
-	UserService      userService();
 }

core/src/main/java/de/srsoftware/umbrella/core/api/UserService.java

@@ -3,6 +3,7 @@ package de.srsoftware.umbrella.core.api;
 
 import com.sun.net.httpserver.HttpExchange;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
+import de.srsoftware.umbrella.core.model.Session;
 import de.srsoftware.umbrella.core.model.Token;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
 import java.util.Collection;
@@ -10,10 +11,13 @@ import java.util.Map;
 import java.util.Optional;
 
 public interface UserService {
-	Map<Long, UmbrellaUser> list(Collection<Long> ids) throws UmbrellaException;
+	void dropSession(Token token) throws UmbrellaException;
+	Session extend(Session session) throws UmbrellaException;
+	Map<Long, UmbrellaUser> list(Integer start, Integer limit, Collection<Long> ids) throws UmbrellaException;
+	Session load(Token token) throws UmbrellaException;
+	UmbrellaUser load(Session session) throws UmbrellaException;
 	UmbrellaUser loadUser(long userId) throws UmbrellaException;
 	Optional<UmbrellaUser> loadUser(Optional<Token> sessionToken) throws UmbrellaException;
 	Optional<UmbrellaUser> loadUser(HttpExchange ex) throws UmbrellaException;
-	PostBox postBox();
 	Optional<UmbrellaUser> refreshSession(HttpExchange ex);
 }

documents/src/main/java/de/srsoftware/umbrella/documents/DocumentApi.java

@@ -42,10 +42,8 @@ import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.tools.Tuple;
 import de.srsoftware.umbrella.core.BaseHandler;
-import de.srsoftware.umbrella.core.api.CompanyService;
-import de.srsoftware.umbrella.core.api.PostBox;
-import de.srsoftware.umbrella.core.api.Translator;
-import de.srsoftware.umbrella.core.api.UserService;
+import de.srsoftware.umbrella.core.ModuleRegistry;
+import de.srsoftware.umbrella.core.api.*;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
 import de.srsoftware.umbrella.documents.model.*;
@@ -61,32 +59,26 @@ import java.util.stream.Stream;
 import org.json.JSONArray;
 import org.json.JSONObject;
 
-public class DocumentApi extends BaseHandler {
+public class DocumentApi extends BaseHandler implements DocumentService {
 	private static final Predicate<de.srsoftware.document.api.Document> ZUGFERD_FILTER = document -> document.id().equals("Zugferd");
 	private final DocumentRegistry registry = new DocumentRegistry();
 
-	private final CompanyService companies;
 	private final Configuration config;
 	private final DocumentDb db;
-	private final UserService users;
-	private final Translator translator;
-	private final PostBox messages;
+	private final ModuleRegistry modules;
 
-	public DocumentApi(CompanyService companyService, Translator translator, Configuration config) throws UmbrellaException {
+	public DocumentApi(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		this.config = config;
-		this.translator = translator;
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		db = new SqliteDb(connect(dbFile));
-		companies = companyService;
-		users = companyService.userService();
-		messages = users.postBox();
+		modules = registry.add(this);
 
 		Optional<String> templates = config.get(CONFIG_TEMPLATES);
 		if (templates.isEmpty()) throw missingFieldException(CONFIG_TEMPLATES);
-		registry.add(new DocumentDirectory(new File(templates.get())));
-		registry.add(new TemplateProcessor(), new LatexFactory(), new WeasyFactory(), new ZugferdFactory());
+		this.registry.add(new DocumentDirectory(new File(templates.get())));
+		this.registry.add(new TemplateProcessor(), new LatexFactory(), new WeasyFactory(), new ZugferdFactory());
 
-		registry.documents().forEach(d -> LOG.log(DEBUG,"found template: {0}",d));
+		this.registry.documents().forEach(d -> LOG.log(DEBUG,"found template: {0}",d));
 	}
 
 	@Override
@@ -94,7 +86,7 @@ public class DocumentApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = modules.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			long docId = Long.parseLong(head);
@@ -113,7 +105,7 @@ public class DocumentApi extends BaseHandler {
 	private boolean deleteDocument(HttpExchange ex, long docId, UmbrellaUser user) throws IOException, UmbrellaException {
 		var doc = db.loadDoc(docId);
 		var companyId = doc.companyId();
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",doc.companyId());
+		if (!modules.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",doc.companyId());
 		if (doc.state() != NEW) throw new UmbrellaException(HTTP_BAD_REQUEST,"This document has already been sent");
 		return sendContent(ex,db.deleteDoc(docId));
 	}
@@ -121,7 +113,7 @@ public class DocumentApi extends BaseHandler {
 	private boolean deletePosition(HttpExchange ex, long docId, UmbrellaUser user) throws UmbrellaException, IOException {
 		var doc = db.loadDoc(docId);
 		var companyId = doc.companyId();
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",doc.companyId());
+		if (!modules.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",doc.companyId());
 		if (doc.state() != NEW) throw new UmbrellaException(HTTP_BAD_REQUEST,"This document has already been sent");
 		var json = json(ex);
 		if (!(json.has(POSITION) && json.get(POSITION) instanceof Number number)) throw missingFieldException(POSITION);
@@ -134,7 +126,7 @@ public class DocumentApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = modules.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head){
@@ -165,7 +157,7 @@ public class DocumentApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = modules.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			var docId = Long.parseLong(head);
@@ -187,7 +179,7 @@ public class DocumentApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = modules.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head){
@@ -219,7 +211,7 @@ public class DocumentApi extends BaseHandler {
 		var attachment = new Attachment(doc.number()+".pdf",rendered.mimeType(),rendered.bytes());
 		var message = new Message(user,subject,content,null,List.of(attachment));
 		var envelope = new Envelope(message,new User(doc.customer().shortName(),new EmailAddress(email),doc.customer().language()));
-		messages.send(envelope);
+		modules.postBox().send(envelope);
 		db.save(doc.set(SENT));
 		return ok(ex);
 	}
@@ -244,8 +236,8 @@ public class DocumentApi extends BaseHandler {
 	private Tuple<Document,Company> getDocument(long docId, UmbrellaUser user) throws UmbrellaException {
 		var doc = db.loadDoc(docId);
 		var companyId = doc.companyId();
-		var company = companies.get(companyId);
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
+		var company = modules.companyService().get(companyId);
+		if (!modules.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
 		return Tuple.of(doc,company);
 	}
 
@@ -364,7 +356,7 @@ public class DocumentApi extends BaseHandler {
 				.filter(filter)
 				.findAny();
 		if (optDoc.isEmpty()) throw UmbrellaException.notFound("Cannot render {0} {1}: Missing template \"{2}\"",type,document.number(),template);
-		Function<String,String> translate = text -> translator.translate(user.language(),text);
+		Function<String,String> translate = text -> modules.translator().translate(user.language(),text);
 		var pdfData = new HashMap<String,Object>();
 		pdfData.put(FIELD_DOCUMENT,document.renderToMap());
 		pdfData.put("translate",translate);
@@ -413,8 +405,8 @@ public class DocumentApi extends BaseHandler {
 			var json = json(ex);
 			if (!json.has(COMPANY)) throw missingFieldException(COMPANY);
 			long companyId = json.getLong(COMPANY);
-			var company    = companies.get(companyId);
-			if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company);
+			var company    = modules.companyService().get(companyId);
+			if (!modules.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company);
 			var docs = db.listDocs(companyId);
 			var map  = new HashMap<Long,Object>();
 			for (var entry : docs.entrySet()) map.put(entry.getKey(),entry.getValue().summary());
@@ -459,8 +451,8 @@ public class DocumentApi extends BaseHandler {
 		if (!(json.has(SENDER) && json.get(SENDER) instanceof JSONObject senderData)) throw missingFieldException(SENDER);
 		if (!senderData.has(FIELD_COMPANY) || !(senderData.get(FIELD_COMPANY) instanceof Number companyId)) throw missingFieldException(FIELD_COMPANY);
 
-		var company = companies.get(companyId.longValue());
-		if (!companies.membership(companyId.longValue(),user.id())) throw forbidden("You are mot a member of company {0}",company);
+		var company = modules.companyService().get(companyId.longValue());
+		if (!modules.companyService().membership(companyId.longValue(),user.id())) throw forbidden("You are mot a member of company {0}",company);
 
 		if (!json.has(FIELD_CUSTOMER) || !(json.get(FIELD_CUSTOMER) instanceof JSONObject customerData)) throw missingFieldException(FIELD_CUSTOMER);
 		if (!json.has(FIELD_TYPE) || !(json.get(FIELD_TYPE) instanceof Number docTypeId)) throw missingFieldException(FIELD_TYPE);
@@ -506,8 +498,8 @@ public class DocumentApi extends BaseHandler {
 	private boolean postTemplateList(HttpExchange ex, UmbrellaUser user) throws UmbrellaException, IOException {
 		var json = json(ex);
 		if (!(json.has(COMPANY) && json.get(COMPANY) instanceof Number companyId)) throw missingFieldException(COMPANY);
-		var company = companies.get(companyId.longValue());
-		if (!companies.membership(companyId.longValue(),user.id())) throw forbidden("You are not a member of {0}",company.name());
+		var company = modules.companyService().get(companyId.longValue());
+		if (!modules.companyService().membership(companyId.longValue(),user.id())) throw forbidden("You are not a member of {0}",company.name());
 		var templates = db.getCompanyTemplates(companyId.longValue());
 		return sendContent(ex,templates.stream().map(Template::toMap));
 	}

items/src/main/java/de/srsoftware/umbrella/items/ItemApi.java

@@ -13,8 +13,8 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
-import de.srsoftware.umbrella.core.api.CompanyService;
-import de.srsoftware.umbrella.core.api.UserService;
+import de.srsoftware.umbrella.core.ModuleRegistry;
+import de.srsoftware.umbrella.core.api.ItemService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Token;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
@@ -22,17 +22,15 @@ import java.io.IOException;
 import java.util.HashMap;
 import java.util.Optional;
 
-public class ItemApi extends BaseHandler {
+public class ItemApi extends BaseHandler implements ItemService {
 
 	private final ItemDb itemDb;
-	private final CompanyService companies;
-	private final UserService users;
+	private final ModuleRegistry registry;
 
-	public ItemApi(Configuration config, CompanyService companyService) throws UmbrellaException {
+	public ItemApi(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		itemDb = new SqliteDb(connect(dbFile));
-		companies = companyService;
-		users = companies.userService();
+		this.registry = registry.add(this);
 	}
 
 	@Override
@@ -40,7 +38,7 @@ public class ItemApi extends BaseHandler {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -56,8 +54,8 @@ public class ItemApi extends BaseHandler {
 		var json = json(ex);
 		if (!(json.has(COMPANY_ID) && json.get(COMPANY_ID) instanceof Number cid)) throw missingFieldException(COMPANY_ID);
 		var companyId = cid.longValue();
-		var company = companies.get(companyId);
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
+		var company = registry.companyService().get(companyId);
+		if (!registry.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
 		var items = itemDb.list(companyId)
 				.stream()
 				.map(Item::toMap)

legacy/src/main/java/de/srsoftware/umbrella/legacy/LegacyApi.java

@@ -19,11 +19,11 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Session;
 import de.srsoftware.umbrella.core.model.Token;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
-import de.srsoftware.umbrella.user.api.UserDb;
 import java.io.IOException;
 import java.time.Instant;
 import java.util.*;
@@ -31,12 +31,12 @@ import org.json.JSONObject;
 
 public class LegacyApi extends BaseHandler {
 
-	private final UserDb users;
 	private final Configuration config;
 	private final String messageUrl;
+	private final ModuleRegistry registry;
 
-	public LegacyApi(UserDb userDb, Configuration config)  {
-		users = userDb;
+	public LegacyApi(ModuleRegistry registry, Configuration config)  {
+		this.registry = registry;
 		this.config = config.subset("umbrella.modules").orElseThrow(() -> new RuntimeException("Missing configuration: umbrella.modules"));
 		this.messageUrl = null;
 	}
@@ -128,7 +128,7 @@ public class LegacyApi extends BaseHandler {
 			throw new UmbrellaException(400,"Fetching related users not implemented, yet!");
 		}
 
-		Map<Long, UmbrellaUser> userMap = users.list(0, null, ids);
+		Map<Long, UmbrellaUser> userMap = registry.userService().list(0, null, ids);
 		if (arrayPassed || userMap.size() != 1) {
 			var userData = new HashMap<Long, Map<String, Object>>();
 			for (var entry : userMap.entrySet()) userData.put(entry.getKey(),entry.getValue().toMap());
@@ -180,7 +180,7 @@ public class LegacyApi extends BaseHandler {
 			}
 		}
 		if (!recipients.isEmpty()){ // replace legacy user ids by user objects in receivers field
-			Map<Long, UmbrellaUser> resp = users.list(0, null, recipients);
+			Map<Long, UmbrellaUser> resp = registry.userService().list(0, null, recipients);
 			data.put("receivers",resp.values().stream().map(UmbrellaUser::toMap).toList());
 		}
 
@@ -203,7 +203,7 @@ public class LegacyApi extends BaseHandler {
 		var optToken = SessionToken.from(ex).map(Token::of);
 		if (optToken.isPresent()) try{
 			var token = optToken.get();
-			users.dropSession(token);
+			registry.userService().dropSession(token);
 			var expiredToken = new SessionToken(token.toString(),"/", Instant.now().minus(1, DAYS),true);
 			expiredToken.addTo(ex);
 			if (returnTo instanceof String location) return sendRedirect(ex,location);
@@ -245,8 +245,8 @@ public class LegacyApi extends BaseHandler {
 	};
 
 	protected Session requestSession(Token token) throws UmbrellaException {
-		var session = users.load(token);
-		session = users.extend(session);
+		var session = registry.userService().load(token);
+		session = registry.userService().extend(session);
 		return session;
 	}
 
@@ -280,8 +280,8 @@ public class LegacyApi extends BaseHandler {
 
 		var o = map.get(TOKEN);
 		if (!(o instanceof String token)) throw new UmbrellaException(500,"Request did not contain token!");
-		var session = users.load(Token.of(token));
-		var user = users.load(session);
+		var session = registry.userService().load(Token.of(token));
+		var user = registry.userService().load(session);
 		var userMap = user.toMap();
 		userMap.put(TOKEN,Map.of(TOKEN,token,EXPIRATION,session.expiration().getEpochSecond()));
 		return sendContent(ex,userMap);

markdown/src/main/java/de/srsoftware/umbrella/markdown/MarkdownApi.java

@@ -7,19 +7,20 @@ import com.sun.net.httpserver.HttpExchange;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.Util;
-import de.srsoftware.umbrella.core.api.UserService;
+import de.srsoftware.umbrella.core.api.MarkdownService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Token;
 import java.io.IOException;
 import java.util.Optional;
 
-public class MarkdownApi extends BaseHandler {
+public class MarkdownApi extends BaseHandler implements MarkdownService {
 
-	private final UserService users;
+	private final ModuleRegistry registry;
 
-	public MarkdownApi(UserService userService) {
-		users = userService;
+	public MarkdownApi(ModuleRegistry registry) {
+		this.registry = registry.add(this);
 	}
 
 	@Override
@@ -27,7 +28,7 @@ public class MarkdownApi extends BaseHandler {
 		try {
 			addCors(ex);
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 
 			if (user.isEmpty()) throw UmbrellaException.forbidden("You must be logged in to use the markdown renderer!");
 			var rendered = Util.markdown(body(ex));

messages/src/main/java/de/srsoftware/umbrella/message/MessageApi.java

@@ -2,12 +2,13 @@
 package de.srsoftware.umbrella.message;
 
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 
 public class MessageApi extends BaseHandler {
-	private final MessageSystem messageSystem;
+	private final ModuleRegistry registry;
 
-	public MessageApi(MessageSystem messageSystem) {
+	public MessageApi(ModuleRegistry moduleRegistry) {
 		super();
-		this.messageSystem = messageSystem;
+		this.registry = moduleRegistry;
 	}
 }

messages/src/main/java/de/srsoftware/umbrella/message/MessageSystem.java

@@ -9,8 +9,8 @@ import static de.srsoftware.umbrella.message.Constants.*;
 import static java.lang.System.Logger.Level.*;
 
 import de.srsoftware.configuration.Configuration;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.PostBox;
-import de.srsoftware.umbrella.core.api.Translator;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Envelope;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
@@ -32,6 +32,8 @@ import java.util.function.BiFunction;
 public class MessageSystem implements PostBox {
 	public static final System.Logger LOG = System.getLogger(MessageSystem.class.getSimpleName());
 	private final Timer timer = new Timer();
+	private final ModuleRegistry registry;
+
 	private record Receiver(User user, de.srsoftware.umbrella.core.model.Message message){}
 
 	private class SubmissionTask extends TimerTask{
@@ -66,22 +68,20 @@ public class MessageSystem implements PostBox {
 	private final int port;
 	private final SqliteMessageDb db;
 	private Session session;
-	private List<Envelope> queue = new CopyOnWriteArrayList<>();
+	private final List<Envelope> queue = new CopyOnWriteArrayList<>();
 	private String debugAddress;
 	private final HashMap<Receiver,List<Exception>> exceptions = new HashMap<>();
-	private final Translator translator;
-
-	public MessageSystem(Translator translator, Configuration config) throws UmbrellaException {
-		var messageDbFile = config.get(CONFIG_DB).orElseThrow(() -> missingConfigException(CONFIG_DB));
-		db        = new SqliteMessageDb(connect(messageDbFile));
 
-		this.translator = translator;
+	public MessageSystem(ModuleRegistry moduleRegistry, Configuration config) throws UmbrellaException {
+		var dbFile   = config.get(CONFIG_DB).orElseThrow(() -> missingConfigException(CONFIG_DB));
+		db           = new SqliteMessageDb(connect(dbFile));
 		debugAddress = config.get(DEBUG_ADDREESS).map(Object::toString).orElse(null);
-		port = config.get(CONFIG_SMTP_PORT,587);
-		host = config.get(CONFIG_SMTP_HOST).map(Object::toString).orElseThrow(() -> new RuntimeException("umbrella.modules.message.smtp.host not configured!"));
-		user = config.get(CONFIG_SMTP_USER).map(Object::toString).orElseThrow(()       -> new RuntimeException("umbrella.modules.message.smtp.user not configured!"));
-		pass = config.get(CONFIG_SMTP_PASS).map(Object::toString).orElseThrow(()   -> new RuntimeException("umbrella.modules.message.smtp.pass not configured!"));
-		from = user;
+		port         = config.get(CONFIG_SMTP_PORT,587);
+		host         = config.get(CONFIG_SMTP_HOST).map(Object::toString).orElseThrow(() -> new RuntimeException("umbrella.modules.message.smtp.host not configured!"));
+		user         = config.get(CONFIG_SMTP_USER).map(Object::toString).orElseThrow(()       -> new RuntimeException("umbrella.modules.message.smtp.user not configured!"));
+		pass         = config.get(CONFIG_SMTP_PASS).map(Object::toString).orElseThrow(()   -> new RuntimeException("umbrella.modules.message.smtp.pass not configured!"));
+		from         = user;
+		registry     = moduleRegistry.add(this);
 		new SubmissionTask(8).schedule();
 		new SubmissionTask(10).schedule();
 		new SubmissionTask(12).schedule();
@@ -117,7 +117,7 @@ public class MessageSystem implements PostBox {
 		var date = new Date();
 
 		for (var receiver : dueRecipients){
-			BiFunction<String,Map<String,String>,String> translateFunction = (text,fills) -> translator.translate(receiver.language(),text,fills);
+			BiFunction<String,Map<String,String>,String> translateFunction = (text,fills) -> registry.translator().translate(receiver.language(),text,fills);
 
 			var combined = new CombinedMessage("Collected messages",translateFunction);
 			var envelopes = queue.stream().filter(env -> env.isFor(receiver)).toList();

notes/src/main/java/de/srsoftware/umbrella/notes/NoteModule.java

@@ -12,8 +12,8 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.NoteService;
-import de.srsoftware.umbrella.core.api.UserService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Note;
 import de.srsoftware.umbrella.core.model.Token;
@@ -26,12 +26,12 @@ import java.util.stream.Collectors;
 
 public class NoteModule extends BaseHandler implements NoteService {
 	private final NotesDb notesDb;
-	private final UserService users;
+	private final ModuleRegistry registry;
 
-	public NoteModule(Configuration config, UserService userService) {
+	public NoteModule(ModuleRegistry registry, Configuration config) {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		notesDb = new SqliteDb(connect(dbFile));
-		users      = userService;
+		this.registry      = registry.add(this);
 	}
 
 	@Override
@@ -44,7 +44,7 @@ public class NoteModule extends BaseHandler implements NoteService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			if (head == null) throw unprocessable("Module missing in path.");
@@ -71,7 +71,7 @@ public class NoteModule extends BaseHandler implements NoteService {
 	public boolean doGet(Path path, HttpExchange ex) throws IOException {
 		addCors(ex);
 		try {
-			var user = users.refreshSession(ex);
+			var user = registry.userService().refreshSession(ex);
 			if (user.isEmpty()) return unauthorized(ex);
 			var module = path.pop();
 			Map<Long,Note> notes = null;
@@ -82,7 +82,7 @@ public class NoteModule extends BaseHandler implements NoteService {
 				long entityId = Long.parseLong(head);
 				notes = getNotes(module, entityId);
 			}
-			var authors = notes.values().stream().map(Note::authorId).distinct().map(users::loadUser).collect(Collectors.toMap(UmbrellaUser::id,UmbrellaUser::toMap));
+			var authors = notes.values().stream().map(Note::authorId).distinct().map(registry.userService()::loadUser).collect(Collectors.toMap(UmbrellaUser::id,UmbrellaUser::toMap));
 			return sendContent(ex, Map.of("notes",mapValues(notes),"authors",authors));
 		} catch (NumberFormatException e){
 			return sendContent(ex,HTTP_UNPROCESSABLE,"Entity id missing in path.");
@@ -96,7 +96,7 @@ public class NoteModule extends BaseHandler implements NoteService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			long noteId = Long.parseLong(head);
@@ -119,7 +119,7 @@ public class NoteModule extends BaseHandler implements NoteService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var module = path.pop();
 			if (module == null) throw unprocessable("Module missing in path.");

project/src/main/java/de/srsoftware/umbrella/project/ProjectModule.java

@@ -18,10 +18,8 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
-import de.srsoftware.umbrella.core.api.CompanyService;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.ProjectService;
-import de.srsoftware.umbrella.core.api.TagService;
-import de.srsoftware.umbrella.core.api.UserService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
 import java.io.IOException;
@@ -32,37 +30,27 @@ import org.json.JSONObject;
 public class ProjectModule extends BaseHandler implements ProjectService {
 
 	private final ProjectDb projects;
-	private final CompanyService companies;
-	private final UserService users;
-	private final TagService tags;
+	private final ModuleRegistry registy;
 
-	public ProjectModule(Configuration config, CompanyService companyService, TagService tagService) throws UmbrellaException {
+	public ProjectModule(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		projects   = new SqliteDb(connect(dbFile));
-		companies  = companyService;
-		tags       = tagService;
-		users      = companies.userService();
+		this.registy = registry.add(this);
 	}
 
 	private void addMember(Project project, long userId) {
-		var user = users.loadUser(userId);
+		var user = registy.userService().loadUser(userId);
 		var member = new Member(user,READ_ONLY);
 		project.members().put(userId,member);
 		project.dirty(MEMBERS);
 	}
 
-
-	@Override
-	public CompanyService companyService() {
-		return companies;
-	}
-
 	@Override
 	public boolean doGet(Path path, HttpExchange ex) throws IOException {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registy.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -86,7 +74,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registy.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -109,7 +97,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registy.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -141,7 +129,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 		var project = loadMembers(projects.load(projectId));
 		if (!project.hasMember(user)) throw forbidden("You are not a member of {0}",project.name());
 		var map = project.toMap();
-		project.companyId().map(companies::get).map(Company::toMap).ifPresent(data -> map.put(COMPANY,data));
+		project.companyId().map(registy.companyService()::get).map(Company::toMap).ifPresent(data -> map.put(COMPANY,data));
 		return sendContent(ex,map);
 	}
 
@@ -152,8 +140,8 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 	}
 
 	private boolean listCompanyProjects(HttpExchange ex, UmbrellaUser user, long companyId) throws IOException, UmbrellaException {
-		var company = companies.get(companyId);
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
+		var company = registy.companyService().get(companyId);
+		if (!registy.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
 		var projects = listCompanyProjects(companyId,false);
 		return sendContent(ex,mapValues(projects));
 	}
@@ -182,7 +170,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 			for (var entry : projects.getMembers(project).entrySet()){
 				var userId = entry.getKey();
 				var permission = entry.getValue();
-				var user = userMap.computeIfAbsent(userId,k -> users.loadUser(userId));
+				var user = userMap.computeIfAbsent(userId,k -> registy.userService().loadUser(userId));
 				project.members().put(userId,new Member(user,permission));
 			}
 		}
@@ -206,7 +194,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 					if (member.permission() == OWNER) members.put(member.user().id(),new Member(member.user(),EDIT));
 				}
 			}
-			members.put(userId,new Member(users.loadUser(userId),permission));
+			members.put(userId,new Member(registy.userService().loadUser(userId),permission));
 			project.dirty(MEMBERS);
 		}
 	}
@@ -245,7 +233,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 		}
 		Long companyId = null;
 		if (json.has(COMPANY_ID) && json.get(COMPANY_ID) instanceof Number number){
-			if (!companies.membership(number.longValue(), user.id())) throw forbidden("You are not a member of company {0}!",number);
+			if (!registy.companyService().membership(number.longValue(), user.id())) throw forbidden("You are not a member of company {0}!",number);
 			companyId = number.longValue();
 		}
 		var showClosed = false;
@@ -258,7 +246,7 @@ public class ProjectModule extends BaseHandler implements ProjectService {
 
 		if (json.has(TAGS) && json.get(TAGS) instanceof JSONArray arr){
 			var tagList = arr.toList().stream().filter(elem -> elem instanceof String).map(String.class::cast).toList();
-			tags.save(PROJECT,prj.id(),null,tagList);
+			registy.tagService().save(PROJECT,prj.id(),null,tagList);
 		}
 
 		return sendContent(ex,prj);

tags/src/main/java/de/srsoftware/umbrella/tags/TagModule.java

@@ -14,8 +14,8 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.TagService;
-import de.srsoftware.umbrella.core.api.UserService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Token;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
@@ -25,13 +25,13 @@ import org.json.JSONArray;
 
 public class TagModule extends BaseHandler implements TagService {
 	private final SqliteDb tagDb;
-	private final UserService users;
+	private final ModuleRegistry registry;
 
-	public TagModule(Configuration config, UserService userService) {
+	public TagModule(ModuleRegistry registry, Configuration config) {
 		var tagDbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		var bmDbFile = config.get(de.srsoftware.umbrella.bookmarks.Constants.CONFIG_DATABASE).orElseThrow(() -> missingFieldException(de.srsoftware.umbrella.bookmarks.Constants.CONFIG_DATABASE));
 		tagDb      = new SqliteDb(connect(tagDbFile),connect(bmDbFile));
-		users      = userService;
+		this.registry = registry.add(this);
 	}
 
 	@Override
@@ -44,7 +44,7 @@ public class TagModule extends BaseHandler implements TagService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var module = path.pop();
 			if (module == null) throw unprocessable("Module missing in path.");
@@ -63,7 +63,7 @@ public class TagModule extends BaseHandler implements TagService {
 	public boolean doGet(Path path, HttpExchange ex) throws IOException {
 		addCors(ex);
 		try {
-			var user = users.refreshSession(ex);
+			var user = registry.userService().refreshSession(ex);
 			if (user.isEmpty()) return unauthorized(ex);
 			var module = path.pop();
 			if (module == null) throw unprocessable("Module missing in path.");
@@ -87,7 +87,7 @@ public class TagModule extends BaseHandler implements TagService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var module = path.pop();
 			if (module == null) throw unprocessable("Module missing in path.");
@@ -130,9 +130,4 @@ public class TagModule extends BaseHandler implements TagService {
 		save(module,entityId,userIds,List.of(tag));
 		return tag;
 	}
-
-	@Override
-	public UserService userService() {
-		return users;
-	}
 }

task/src/main/java/de/srsoftware/umbrella/task/TaskModule.java

@@ -20,6 +20,7 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.*;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
@@ -34,41 +35,28 @@ import org.json.JSONObject;
 public class TaskModule extends BaseHandler implements TaskService {
 
 	private final TaskDb taskDb;
-	private final ProjectService projects;
-	private final UserService users;
-	private final CompanyService companies;
-	private final TagService tags;
-	private final NoteService notes;
+	private final ModuleRegistry registry;
 
-	public 	TaskModule(Configuration config, ProjectService projectService, TagService tagService, NoteService noteService) throws UmbrellaException {
+	public 	TaskModule(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		taskDb     = new SqliteDb(connect(dbFile));
-		projects   = projectService;
-		companies  = projectService.companyService();
-		notes      = noteService;
-		tags       = tagService;
-		users      = companies.userService();
+		this.registry = registry.add(this);
 	}
 
 	private void addMember(Task task, long userId) {
-		var user = users.loadUser(userId);
+		var user = registry.userService().loadUser(userId);
 		var member = new Member(user,READ_ONLY);
 		task.members().put(userId,member);
 		task.dirty(MEMBERS);
 	}
 
-	@Override
-	public CompanyService companyService() {
-		return companies;
-	}
-
 	private boolean deleteTask(HttpExchange ex, long taskId, UmbrellaUser user) throws IOException {
 		var task = loadMembers(taskDb.load(taskId));
 		var member = task.members().get(user.id());
 		if (member == null || !member.mayWrite()) throw forbidden("You are not allowed to delete {0}",task.name());
 		taskDb.delete(task);
-		notes.deleteEntity(TASK,taskId);
-		tags.deleteEntity(TASK,taskId);
+		registry.noteService().deleteEntity(TASK,taskId);
+		registry.tagService().deleteEntity(TASK,taskId);
 		return sendContent(ex,Map.of(DELETED,taskId));
 	}
 
@@ -77,7 +65,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -97,7 +85,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -119,7 +107,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -140,7 +128,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -164,9 +152,9 @@ public class TaskModule extends BaseHandler implements TaskService {
 		var json = json(ex);
 		if (!(json.has(COMPANY_ID) && json.get(COMPANY_ID) instanceof Number cid)) throw missingFieldException(COMPANY_ID);
 		var companyId = cid.longValue();
-		var company = companies.get(companyId);
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
-		var projectMap = this.projects.listCompanyProjects(companyId,false);
+		var company = registry.companyService().get(companyId);
+		if (!registry.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
+		var projectMap = registry.projectService().listCompanyProjects(companyId,false);
 		var taskMap = taskDb.listTasks(projectMap.keySet());
 		var taskTree = new HashMap<Long,Map<String,Object>>();
 		taskMap.values().stream().filter(task -> !is0(task.estimatedTime())).forEach(task -> placeInTree(task,taskTree,taskMap));
@@ -201,7 +189,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 
 	@Override
 	public HashMap<Long, Task> listCompanyTasks(long companyId) throws UmbrellaException {
-		var projectList = projects.listCompanyProjects(companyId,false);
+		var projectList = registry.projectService().listCompanyProjects(companyId,false);
 		return taskDb.listTasks(projectList.keySet());
 	}
 
@@ -217,7 +205,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 			for (var entry : taskDb.getMembers(task).entrySet()){
 				var userId = entry.getKey();
 				var permission = entry.getValue();
-				var user = userMap.computeIfAbsent(userId,k -> users.loadUser(userId));
+				var user = userMap.computeIfAbsent(userId,k -> registry.userService().loadUser(userId));
 				task.members().put(userId,new Member(user,permission));
 			}
 		}
@@ -262,7 +250,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 					if (member.permission() == ASSIGNEE) members.put(member.user().id(),new Member(member.user(),EDIT));
 				}
 			}
-			members.put(userId,new Member(users.loadUser(userId),permission));
+			members.put(userId,new Member(registry.userService().loadUser(userId),permission));
 			task.dirty(MEMBERS);
 		}
 	}
@@ -296,8 +284,8 @@ public class TaskModule extends BaseHandler implements TaskService {
 		if (!(json.has(PROJECT_ID) && json.get(PROJECT_ID) instanceof Number pid)) throw missingFieldException(PROJECT_ID);
 		if (!(json.has(MEMBERS) && json.get(MEMBERS) instanceof JSONObject memberData)) throw missingFieldException(MEMBERS);
 		long projectId = pid.longValue();
-		var project = projects.load(projectId);
-		projects.loadMembers(List.of(project));
+		var project = registry.projectService().load(projectId);
+		registry.projectService().loadMembers(List.of(project));
 		var member = project.members().get(user.id());
 		if (member == null || member.permission() == READ_ONLY) throw forbidden("You are not allowed to create new tasks in this project");
 		for (var key : memberData.keySet()){
@@ -326,7 +314,7 @@ public class TaskModule extends BaseHandler implements TaskService {
 		}
 		if (json.has(TAGS) && json.get(TAGS) instanceof JSONArray arr){
 			var tagList = arr.toList().stream().filter(e -> e instanceof String).map(String.class::cast).toList();
-			tags.save(TASK,task.id(),null,tagList);
+			registry.tagService().save(TASK,task.id(),null,tagList);
 		}
 		return sendContent(ex,loadMembers(task));
 	}
@@ -347,14 +335,4 @@ public class TaskModule extends BaseHandler implements TaskService {
 		if (isSet(parentTaskId)) return sendContent(ex,mapValues(taskDb.listChildrenOf(parentTaskId,user,showClosed)));
 		return sendEmptyResponse(HTTP_NOT_IMPLEMENTED,ex);
 	}
-
-	@Override
-	public ProjectService projectService() {
-		return projects;
-	}
-
-	@Override
-	public UserService userService() {
-		return users;
-	}
 }

time/src/main/java/de/srsoftware/umbrella/time/TimeModule.java

@@ -14,6 +14,7 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.*;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
@@ -25,27 +26,23 @@ public class TimeModule extends BaseHandler implements TimeService {
 
 	private class ExtendedTime extends Time{
 
-		private final Collection<Task> tasks;
 
+		private final Collection<Task> tasks;
 		public ExtendedTime(long id, long userId, String subject, String description, LocalDateTime start, LocalDateTime end, State state, Collection<Task> tasks) {
 			super(id, userId, subject, description, start, end, state, tasks.stream().map(Task::id).toList());
 			this.tasks = tasks;
 		}
+
 	}
 
-	private final UserService users;
+	private final ModuleRegistry registry;
 	private final TimeDb timeDb;
-	private final TaskService tasks;
-	private final CompanyService companies;
-	private final ProjectService projects;
-
-	public TimeModule(Configuration config, TaskService taskService) throws UmbrellaException {
-		companies = taskService.companyService();
-		projects = taskService.projectService();
-		tasks = taskService;
-		users = tasks.userService();
+
+
+	public TimeModule(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingFieldException(CONFIG_DATABASE));
 		timeDb = new SqliteDb(connect(dbFile));
+		this.registry = registry.add(this);
 	}
 
 	@Override
@@ -53,7 +50,7 @@ public class TimeModule extends BaseHandler implements TimeService {
 		addCors(ex);
 		try {
 			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = users.loadUser(token);
+			var user = registry.userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
@@ -109,11 +106,11 @@ public class TimeModule extends BaseHandler implements TimeService {
 		var json = json(ex);
 		if (!(json.has(COMPANY_ID) && json.get(COMPANY_ID) instanceof Number cid)) throw missingFieldException(COMPANY_ID);
 		var companyId = cid.longValue();
-		var company = companies.get(companyId);
-		if (!companies.membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
+		var company = registry.companyService().get(companyId);
+		if (!registry.companyService().membership(companyId,user.id())) throw forbidden("You are mot a member of company {0}",company.name());
 		if (!(json.has(PROJECT_ID) && json.get(PROJECT_ID) instanceof Number pid)) throw missingFieldException(PROJECT_ID);
 		long projectId = pid.longValue();
-		Map<Long,Task> tasksOfProject = tasks.listProjectTasks(projectId);
+		Map<Long,Task> tasksOfProject = registry.taskService().listProjectTasks(projectId);
 
 		List<Map<String, Object>> times = timeDb.listTimes(tasksOfProject.keySet())
 				.stream().filter(not(Time::isClosed))

translations/src/main/java/de/srsoftware/umbrella/translations/Translations.java

@@ -7,6 +7,7 @@ import static java.nio.charset.StandardCharsets.UTF_8;
 import com.sun.net.httpserver.HttpExchange;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.PathHandler;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.Translator;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -20,6 +21,10 @@ public class Translations extends PathHandler implements Translator {
 
 	private HashMap<String, JSONObject> translations = new HashMap<>();
 
+	public Translations(ModuleRegistry registry) {
+		registry.add(this);
+	}
+
 	@Override
 	public boolean doGet(Path path, HttpExchange ex) throws IOException {
 		allowOrigin(ex,"*");

user/src/main/java/de/srsoftware/umbrella/user/UserModule.java

@@ -30,7 +30,7 @@ import de.srsoftware.configuration.Configuration;
 import de.srsoftware.tools.Path;
 import de.srsoftware.tools.SessionToken;
 import de.srsoftware.umbrella.core.BaseHandler;
-import de.srsoftware.umbrella.core.api.PostBox;
+import de.srsoftware.umbrella.core.ModuleRegistry;
 import de.srsoftware.umbrella.core.api.UserService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
@@ -59,6 +59,7 @@ public class UserModule extends BaseHandler implements UserService {
 
 
 	private record State(LoginService loginService, JSONObject config){
+
 		public static State of(LoginService loginService, JSONObject config) {
 			return new State(loginService,config);
 		}
@@ -68,9 +69,9 @@ public class UserModule extends BaseHandler implements UserService {
 	private static final System.Logger LOG = System.getLogger("User");
 	private final UserDb users;
 	private final LoginServiceDb logins;
+	private final ModuleRegistry registry;
 	private final HashMap<String, State> stateMap = new HashMap<>(); // map from state to OIDC provider name
 	private final HashMap<String,String> tokenMap = new HashMap<>();
-	private final PostBox messages;
 
 	static {
 		try {
@@ -80,16 +81,12 @@ public class UserModule extends BaseHandler implements UserService {
 		}
 	}
 
-	public UserModule(Configuration config, PostBox messageSystem) throws UmbrellaException {
+	public UserModule(ModuleRegistry registry, Configuration config) throws UmbrellaException {
 		var dbFile = config.get(CONFIG_DATABASE).orElseThrow(() -> missingConfigException(CONFIG_DATABASE));
 		// may be splitted in separate db files later
-		logins   = new SqliteDB(connect(dbFile));
-		messages = messageSystem;
-		users    = new SqliteDB(connect(dbFile));
-	}
-
-	public UserDb userDb(){
-		return users;
+		logins        = new SqliteDB(connect(dbFile));
+		users         = new SqliteDB(connect(dbFile));
+		this.registry = registry.add(this);
 	}
 
 	private boolean deleteOIDC(HttpExchange ex, UmbrellaUser user, Path path) throws IOException {
@@ -137,10 +134,15 @@ public class UserModule extends BaseHandler implements UserService {
 	}
 
 	@Override
-	public Map<Long, UmbrellaUser> list(Collection<Long> ids) throws UmbrellaException {
+	public Map<Long, UmbrellaUser> list(Integer start, Integer limit, Collection<Long> ids) throws UmbrellaException {
 		return users.list(0,null,ids);
 	}
 
+	public UmbrellaUser load(Session session) throws UmbrellaException{
+		return users.load(session);
+	}
+
+
 	@Override
 	public UmbrellaUser loadUser(long userId) throws UmbrellaException {
 		return users.load(userId);
@@ -149,8 +151,8 @@ public class UserModule extends BaseHandler implements UserService {
 	public Optional<UmbrellaUser> loadUser(Optional<Token> sessionToken) throws UmbrellaException {
 		try {
 			if (sessionToken.isEmpty()) return empty();
-			var session = users.load(sessionToken.get());
-			return Optional.of(users.load(session));
+			var session = load(sessionToken.get());
+			return Optional.of(load(session));
 		} catch (UmbrellaException e) {
 			return empty();
 		}
@@ -256,6 +258,12 @@ public class UserModule extends BaseHandler implements UserService {
 		}
 	}
 
+	@Override
+	public void dropSession(Token token) throws UmbrellaException{
+		users.dropSession(token);
+	}
+
+
 	private boolean exchangeToken(HttpExchange ex) throws IOException {
 		JSONObject params;
 		try {
@@ -296,6 +304,11 @@ public class UserModule extends BaseHandler implements UserService {
 		}
 	}
 
+	public Session extend(Session session) throws UmbrellaException{
+		return users.extend(session);
+	}
+
+
 	private boolean getConnectedServices(HttpExchange ex, UmbrellaUser user) throws IOException {
 		if (user == null) return unauthorized(ex);
 		try {
@@ -395,6 +408,11 @@ public class UserModule extends BaseHandler implements UserService {
 		return sendContent(ex,targetUser.toMap());
 	}
 
+	public Session load(Token token) throws UmbrellaException{
+		return  users.load(token);
+	}
+
+
 	public boolean logout(HttpExchange ex, Optional<Token> optToken) throws IOException {
 		if (optToken.isPresent()){
 			var token = optToken.get();
@@ -451,11 +469,6 @@ public class UserModule extends BaseHandler implements UserService {
 		return sendContent(ex,service.toMap());
 	}
 
-	@Override
-	public PostBox postBox() {
-		return messages;
-	}
-
 	private boolean postCreate(HttpExchange ex) throws IOException, UmbrellaException {
 		var optUser = loadUser(ex);
 		if (!(optUser.isPresent() && optUser.get() instanceof DbUser dbUser)) return unauthorized(ex);
@@ -491,7 +504,7 @@ public class UserModule extends BaseHandler implements UserService {
 			var fills = Map.of("url",url);
 			var message = new Message(user,subject,content,fills,null);
 			var envelope = new Envelope(message,user);
-			messages.send(envelope);
+			registry.postBox().send(envelope);
 		} catch (UmbrellaException e){
 			return send(ex,e);
 		}