AutomaticPackageReplicatorJob.java

/*
 * #%L
 * ACS AEM Commons Bundle
 * %%
 * Copyright (C) 2017 - Adobe
 * %%
 * 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.
 * #L%
 */
package com.adobe.acs.commons.replication.packages.automatic.impl;

import java.io.IOException;
import java.util.HashMap;

import javax.jcr.RepositoryException;
import javax.jcr.Session;

import org.apache.jackrabbit.vault.packaging.JcrPackage;
import org.apache.jackrabbit.vault.packaging.JcrPackageManager;
import org.apache.jackrabbit.vault.packaging.PackageException;
import org.apache.jackrabbit.vault.packaging.PackageId;
import org.apache.jackrabbit.vault.packaging.PackagingService;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.osgi.service.event.Event;
import org.osgi.service.event.EventAdmin;
import org.osgi.service.event.EventHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.day.cq.replication.ReplicationActionType;
import com.day.cq.replication.ReplicationException;
import com.day.cq.replication.Replicator;

/**
 * Simple Job Runnable for automatically replicating a package.
 */
public class AutomaticPackageReplicatorJob implements Runnable, EventHandler {
	private static final Logger log = LoggerFactory.getLogger(AutomaticPackageReplicatorJob.class);
	public static final String SERVICE_USER_NAME = "acs-commons-automatic-package-replication-service";
	public static final String OSGI_EVENT_REPLICATED_TOPIC = "com/adobe/acs/commons/automatic_page_replicator/REPLICATED";
	public static final String OSGI_EVENT_FAILED_TOPIC = "com/adobe/acs/commons/automatic_page_replicator/REPLICATION_FAILED";
	public static final String OSGI_EVENT_PACKAGE_PATH_PARAM = "packagePath";

	private final Replicator replicator;
	private final String packagePath;
	private final ResourceResolverFactory resolverFactory;
	private final EventAdmin eventAdmin;

	public AutomaticPackageReplicatorJob(final ResourceResolverFactory resolverFactory, final Replicator replicator,
			final EventAdmin eventAdmin, final String packagePath) {
		this.replicator = replicator;
		this.packagePath = packagePath;
		this.resolverFactory = resolverFactory;
		this.eventAdmin = eventAdmin;
	}

	public void excute() throws RepositoryException, PackageException, IOException, ReplicationException {

		boolean succeeded = false;
		ResourceResolver resolver = null;
		try {
			resolver = ConfigurationUpdateListener.getResourceResolver(resolverFactory);

			Session session = resolver.adaptTo(Session.class);

			JcrPackageManager pkgMgr = PackagingService.getPackageManager(session);
			PackageId packageId = new PackageId(packagePath);

			// check if the package exists
			JcrPackage jcrPackage = pkgMgr.open(packageId);
			if (jcrPackage == null || jcrPackage.getNode() == null) {
				log.warn("Package at path " + packagePath + " does not exist");
				throw new IllegalArgumentException("Package at path " + packagePath + " does not exist");
			}

			log.debug("Assembling package {}", packagePath);
			pkgMgr.assemble(jcrPackage, null);

			log.debug("Replicating package {}", packagePath);
			replicator.replicate(session, ReplicationActionType.ACTIVATE, jcrPackage.getNode().getPath());

			log.debug("Package {} replicated successfully!", packagePath);
			fireEvent(OSGI_EVENT_REPLICATED_TOPIC);
			succeeded = true;
		} finally {
			if(resolver != null){
				resolver.close();
			}
			if(!succeeded){
				fireEvent(OSGI_EVENT_FAILED_TOPIC);
			}
		}
	}

	private void fireEvent(String topic) {
		final Event event = new Event(topic, new HashMap<String, String>() {
			private static final long serialVersionUID = 1L;
			{
				put(OSGI_EVENT_PACKAGE_PATH_PARAM, packagePath);
			}
		});
		eventAdmin.postEvent(event);
	}

	@Override
	public void run() {
		log.trace("run");
		try {
			excute();
		} catch (Exception e) {
			log.error("Excepting running Automatic Package Replication task", e);
		}
	}

	@Override
	public void handleEvent(Event event) {
		run();
	}

}