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Send Pending Messages After Successful Handshake (#111)

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Instead of caching pending messages during the handshake and relaying
them afterwards, they are now sent after the handshake has been
completed.

This is possible because the relevant processors (messages and status
changes) are now event handlers which are registered at the event bus,
which means that they can immediately react to pending messages even if
Client#initReceiver has not been fully executed yet.

Because Client#initReceiver exists for that very reason, it is no
longer necessary anymore. ID generator initialization, which was its other part,
is now directly handled in Startup#performHandshake, which is a far more
sensible placement.

Fixes #106

Reviewed-on: https://git.kske.dev/zdm/envoy/pulls/111
Reviewed-by: DieGurke <maxi@kske.dev>
This commit is contained in:
Kai S. K. Engelbart
2020-12-02 21:21:00 +01:00
parent 10213a0d3d
commit dcf1b0c58d
3 changed files with 33 additions and 53 deletions
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31
server/src/main/java/envoy/server/processors/LoginCredentialProcessor.java
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@ -40,6 +40,7 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
// Cache this write proxy for user-independent notifications
UserStatusChangeProcessor.setWriteProxy(writeProxy);
// Check for compatible versions
if (!VersionUtil.verifyCompatibility(credentials.getClientVersion())) {
logger.info("The client has the wrong version.");
writeProxy.write(socketID, new HandshakeRejection(WRONG_VERSION));
@ -70,10 +71,10 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
writeProxy.write(socketID, new HandshakeRejection(INVALID_TOKEN));
return;
}
} else
} else if (!PasswordUtil.validate(credentials.getPassword(),
user.getPasswordHash())) {
// Check the password hash
if (!PasswordUtil.validate(credentials.getPassword(), user.getPasswordHash())) {
// Check the password hash
logger.info(user + " has entered the wrong password.");
writeProxy.write(socketID, new HandshakeRejection(WRONG_PASSWORD_OR_USER));
return;
@ -101,7 +102,8 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
writeProxy.write(socketID, new HandshakeRejection(USERNAME_TAKEN));
return;
} catch (final NoResultException e) {
// Creation of a new user
// Create a new user
user = new User();
user.setName(credentials.getIdentifier());
user.setLastSeen(Instant.now());
@ -138,6 +140,15 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
persistenceManager.updateContact(user);
writeProxy.write(socketID, new NewAuthToken(token));
}
// Notify the user if a contact deletion has happened since he last logged in
if (user.getLatestContactDeletion().isAfter(user.getLastSeen()))
writeProxy.write(socketID, new ContactsChangedSinceLastLogin());
// Complete the handshake
writeProxy.write(socketID, user.toCommon());
// Send pending (group) messages and status changes
final var pendingMessages =
PersistenceManager.getInstance().getPendingMessages(user, credentials.getLastSync());
pendingMessages.removeIf(GroupMessage.class::isInstance);
@ -162,8 +173,9 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
writeProxy.write(connectionManager.getSocketID(msg.getSender().getID()),
new MessageStatusChange(msgCommon));
}
} else
} else {
writeProxy.write(socketID, new MessageStatusChange(msgCommon));
}
}
final List<GroupMessage> pendingGroupMessages = PersistenceManager.getInstance()
@ -197,10 +209,11 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
}
PersistenceManager.getInstance().updateMessage(gmsg);
} else
} else {
// Just send the message without updating if it was received in the past
writeProxy.write(socketID, gmsgCommon);
}
} else {
// Sending group message status changes
@ -220,11 +233,5 @@ public final class LoginCredentialProcessor implements ObjectProcessor<LoginCred
writeProxy.write(socketID, new MessageStatusChange(gmsgCommon));
}
}
// Notify the user if a contact deletion has happened since he last logged in
if (user.getLatestContactDeletion().isAfter(user.getLastSeen()))
writeProxy.write(socketID, new ContactsChangedSinceLastLogin());
// Complete the handshake
writeProxy.write(socketID, user.toCommon());
}
}