| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.ericsson.gerrit.plugins.highavailability.forwarder; |
| |
| import com.google.gerrit.server.config.GerritInstanceId; |
| import com.google.gerrit.server.events.Event; |
| import com.google.gerrit.server.events.EventBroker; |
| import com.google.gerrit.server.events.EventListener; |
| import com.google.gerrit.server.events.UserScopedEventListener; |
| import com.google.gerrit.server.notedb.ChangeNotes.Factory; |
| import com.google.gerrit.server.permissions.PermissionBackend; |
| import com.google.gerrit.server.plugincontext.PluginSetContext; |
| import com.google.gerrit.server.project.ProjectCache; |
| import com.google.inject.Inject; |
| import java.util.Objects; |
| import javax.annotation.Nullable; |
| |
| class ForwardedAwareEventBroker extends EventBroker { |
| |
| @Inject |
| ForwardedAwareEventBroker( |
| PluginSetContext<UserScopedEventListener> listeners, |
| PluginSetContext<EventListener> unrestrictedListeners, |
| PermissionBackend permissionBackend, |
| ProjectCache projectCache, |
| Factory notesFactory, |
| @Nullable @GerritInstanceId String gerritInstanceId) { |
| super( |
| listeners, |
| unrestrictedListeners, |
| permissionBackend, |
| projectCache, |
| notesFactory, |
| gerritInstanceId); |
| } |
| |
| private boolean isProducedByLocalInstance(Event event) { |
| return Objects.equals(event.instanceId, gerritInstanceId); |
| } |
| |
| @Override |
| protected void fireEventForUnrestrictedListeners(Event event) { |
| // An event should not be dispatched when it is "forwarded". |
| // Meaning, it was either produced somewhere else |
| if (!isProducedByLocalInstance(event)) { |
| Context.setForwardedEvent(true); |
| } |
| // or it was consumed by the high-availability rest endpoint and |
| // thus the context of its consumption has already been set to "forwarded". |
| if (!Context.isForwardedEvent()) { |
| super.fireEventForUnrestrictedListeners(event); |
| } |
| } |
| } |