001/*
002 * (C) Copyright 2006-2016 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     tiry
018 */
019package org.nuxeo.ecm.core.event.pipe;
020
021import org.apache.commons.logging.Log;
022import org.apache.commons.logging.LogFactory;
023import org.nuxeo.ecm.core.event.EventBundle;
024import org.nuxeo.ecm.core.event.EventServiceAdmin;
025import org.nuxeo.ecm.core.event.impl.AsyncEventExecutor;
026import org.nuxeo.ecm.core.event.impl.EventListenerDescriptor;
027import org.nuxeo.ecm.core.event.impl.EventListenerList;
028import org.nuxeo.runtime.api.Framework;
029
030import java.util.List;
031import java.util.Map;
032
033/**
034 * Consumes {@link EventBundle} EventBundles by running asynchronous {@link org.nuxeo.ecm.core.event.EventListener}
035 *
036 * @since 8.4
037 */
038public abstract class AbstractListenerPipeConsumer<T> extends AbstractPipeConsumer<T> {
039
040    private static final Log log = LogFactory.getLog(AbstractListenerPipeConsumer.class);
041
042    protected volatile AsyncEventExecutor asyncExec;
043
044    protected boolean stopping;
045
046    @Override
047    public void initConsumer(String name, Map<String, String> params) {
048        super.initConsumer(name, params);
049        asyncExec = new AsyncEventExecutor();
050        if (Framework.getRuntime() == null) {
051            throw new RuntimeException("Nuxeo Runtime not initialized");
052        }
053    }
054
055    @Override
056    public void shutdown() throws InterruptedException {
057        stopping = true;
058        waitForCompletion(1000L);
059    }
060
061    @Override
062    protected boolean processEventBundles(List<EventBundle> bundles) {
063            EventServiceAdmin eventService = Framework.getService(EventServiceAdmin.class);//
064            EventListenerList listeners = eventService.getListenerList();
065            List<EventListenerDescriptor> postCommitAsync = listeners.getEnabledAsyncPostCommitListenersDescriptors();
066
067            // could introduce bulk mode for EventListeners
068            for (EventBundle eventBundle : bundles) {
069                asyncExec.run(postCommitAsync, eventBundle);
070            }
071            return true;
072    }
073
074    @Override
075    public boolean waitForCompletion(long timeoutMillis) throws InterruptedException {
076        return asyncExec.waitForCompletion(timeoutMillis);
077    }
078}