started adding comments, restructured Database class

src/main/java/de/srsoftware/widerhall/data/MailingList.java

@@ -69,7 +69,7 @@ public class MailingList {
                 .append(SMTP_PASS).append(" ").append(VARCHAR).append(", ")
                 .append(STATE).append(" ").append(INT)
                 .append(");");
-        Database.open().query(sql).run();
+        Database.open().query(sql).compile().run();
     }
 
     public String email() {
@@ -79,12 +79,12 @@ public class MailingList {
 
     public void enable(boolean enable) throws SQLException {
         state = enable ? state | STATE_ENABLED : state ^ (state & STATE_ENABLED);
-        Database.open().update(TABLE_NAME).set(STATE,state).where(EMAIL, email()).run();
+        Database.open().update(TABLE_NAME).set(STATE,state).where(EMAIL, email()).compile().run();
     }
 
     public void hide(boolean hide) throws SQLException {
         state = hide ? state ^ (state & STATE_PUBLIC) : state | STATE_PUBLIC;
-        Database.open().update(TABLE_NAME).set(STATE,state).where(EMAIL, email()).run();
+        Database.open().update(TABLE_NAME).set(STATE,state).where(EMAIL, email()).compile().run();
     }
 
     public boolean isOpenFor(User user) {
@@ -129,7 +129,7 @@ public class MailingList {
             var rs = Database.open()
                     .select(TABLE_NAME)
                     .where(EMAIL,listEmail)
-                    .exec();
+                    .compile().exec();
             if (rs.next()) lists.put(listEmail,ml = MailingList.from(rs));
         } catch (SQLException e) {
             LOG.debug("Failed to load MailingList: ",e);
@@ -156,7 +156,7 @@ public class MailingList {
             var rs = Database.open()
                     .select(TABLE_NAME,EMAIL, "(" + STATE + " & " + STATE_PUBLIC + ") as test")
                     .where("test", STATE_PUBLIC)
-                    .exec();
+                    .compile().exec();
             var emails = new ArrayList<String>();
             while (rs.next()) emails.add(rs.getString(EMAIL));
             rs.close();
@@ -182,7 +182,8 @@ public class MailingList {
 
 
     private MailingList save() throws SQLException {
-        Database.open().insertInto(TABLE_NAME)
+        Database.open()
+                .insertInto(TABLE_NAME)
                 .values(Map.ofEntries(
                         Map.entry(EMAIL, email),
                         Map.entry(NAME, name),
@@ -195,6 +196,7 @@ public class MailingList {
                         Map.entry(SMTP_USER, smtp.username()),
                         Map.entry(SMTP_PASS, smtp.password()),
                         Map.entry(STATE, state)))
+                .compile()
                 .run();
         return this;
     }
@@ -222,14 +224,14 @@ public class MailingList {
         try {
             if (user == null) return openLists();
             if (user.hashPermission(PERMISSION_ADMIN)) {
-                var rs = Database.open().select(TABLE_NAME).exec();
+                var rs = Database.open().select(TABLE_NAME).compile().exec();
                 var result = new HashSet<MailingList>();
                 while (rs.next()) result.add(MailingList.from(rs));
                 rs.close();
                 return result;
             }
             var listEmails = ListMember.listsOwnedBy(user);
-            var rs = Database.open().select(TABLE_NAME).where(EMAIL, listEmails).exec();
+            var rs = Database.open().select(TABLE_NAME).where(EMAIL, listEmails).compile().exec();
             var result = openLists();
             while (rs.next()) result.add(MailingList.from(rs));
             rs.close();