70 lines
2.3 KiB
Java
Executable File
70 lines
2.3 KiB
Java
Executable File
package envoy.server.processors;
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import java.util.logging.Logger;
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import envoy.data.User.UserStatus;
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import envoy.event.UserStatusChange;
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import envoy.util.EnvoyLog;
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import envoy.server.data.*;
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import envoy.server.net.ObjectWriteProxy;
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/**
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* This processor handles incoming {@link UserStatusChange}.
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*
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* @author Leon Hofmeister
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* @since Envoy Server Standalone v0.1-alpha
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*/
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public final class UserStatusChangeProcessor implements ObjectProcessor<UserStatusChange> {
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private static ObjectWriteProxy writeProxy;
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private static final PersistenceManager persistenceManager = PersistenceManager.getInstance();
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private static final Logger logger =
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EnvoyLog.getLogger(UserStatusChangeProcessor.class);
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@Override
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public void process(UserStatusChange input, long socketID, ObjectWriteProxy writeProxy) {
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// new status should not equal old status
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if (input.get().equals(persistenceManager.getUserByID(input.getID()).getStatus())) {
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logger.warning("Received an unnecessary UserStatusChange");
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return;
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}
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updateUserStatus(persistenceManager.getUserByID(input.getID()), input.get());
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}
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/**
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* Sets the {@link UserStatus} for a given user. Both offline contacts and currently online
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* contacts are notified.
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*
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* @param user the user whose status has changed
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* @param newStatus the new status of that user
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* @since Envoy Server Standalone v0.1-alpha
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*/
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public static void updateUserStatus(User user, UserStatus newStatus) {
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user.setStatus(newStatus);
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// Handling for newly logged in clients
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persistenceManager.updateContact(user);
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// Handling for contacts that are already online
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writeProxy.writeToOnlineContacts(user.getContacts(),
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new UserStatusChange(user.getID(), user.getStatus()));
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}
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/**
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* This method is only called by the LoginCredentialProcessor because every user needs to login
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* (open a socket) before changing his status. Needed to ensure propagation of events because an
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* uninitialized writeProxy would cause problems.
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*
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* @param writeProxy the writeProxy that is used to send objects back to clients
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* @since Envoy Server Standalone v0.1-alpha
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*/
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public static void setWriteProxy(ObjectWriteProxy writeProxy) {
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UserStatusChangeProcessor.writeProxy = writeProxy;
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}
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// TODO may cause an problem if two clients log in at the same time.
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// Change Needed.
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}
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