Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 org.apache.stratos.common.internal; import com.hazelcast.core.HazelcastInstance; import org.apache.axis2.engine.AxisConfiguration; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.stratos.common.clustering.impl.HazelcastDistributedObjectProvider; import org.apache.stratos.common.constants.StratosConstants; import org.apache.stratos.common.services.ComponentStartUpSynchronizer; import org.apache.stratos.common.services.DistributedObjectProvider; import org.apache.stratos.common.util.CommonUtil; import org.apache.stratos.common.util.StratosConfiguration; import org.osgi.framework.BundleContext; import org.osgi.service.component.ComponentContext; import org.wso2.carbon.caching.impl.DistributedMapProvider; import org.wso2.carbon.registry.core.service.RegistryService; import org.wso2.carbon.user.core.service.RealmService; import org.wso2.carbon.utils.ConfigurationContextService; /** * @scr.component name="apache.stratos.common" immediate="true" * @scr.reference name="hazelcast.instance.service" interface="com.hazelcast.core.HazelcastInstance" * cardinality="0..1"policy="dynamic" bind="setHazelcastInstance" unbind="unsetHazelcastInstance" * @scr.reference name="distributedMapProvider" interface="org.wso2.carbon.caching.impl.DistributedMapProvider" * cardinality="0..1" policy="dynamic" bind="setDistributedMapProvider" unbind="unsetDistributedMapProvider" * @scr.reference name="registry.service" * interface="org.wso2.carbon.registry.core.service.RegistryService" * cardinality="1..1" policy="dynamic" bind="setRegistryService" * unbind="unsetRegistryService" * @scr.reference name="user.realmservice.default" * interface="org.wso2.carbon.user.core.service.RealmService" * cardinality="1..1" policy="dynamic" bind="setRealmService" * unbind="unsetRealmService" * @scr.reference name="configuration.context.service" interface="org.wso2.carbon.utils.ConfigurationContextService" * cardinality="1..1" policy="dynamic" bind="setConfigurationContextService" unbind="unsetConfigurationContextService" */ public class CommonServiceComponent { private static Log log = LogFactory.getLog(CommonServiceComponent.class); protected void activate(ComponentContext context) { if (log.isDebugEnabled()) { log.debug("Activating CommonServiceComponent..."); } try { final BundleContext bundleContext = context.getBundleContext(); if (CommonUtil.getStratosConfig() == null) { StratosConfiguration stratosConfig = CommonUtil.loadStratosConfiguration(); CommonUtil.setStratosConfig(stratosConfig); } // Loading the EULA if (CommonUtil.getEula() == null) { String eula = CommonUtil.loadTermsOfUsage(); CommonUtil.setEula(eula); } AxisConfiguration axisConfig = ServiceReferenceHolder.getInstance().getAxisConfiguration(); if ((axisConfig != null) && (axisConfig.getClusteringAgent() != null)) { Thread thread = new Thread() { @Override public void run() { try { // Wait for the hazelcast instance to be available long startTime = System.currentTimeMillis(); log.info("Waiting for the hazelcast instance to be initialized..."); while (ServiceReferenceHolder.getInstance().getHazelcastInstance() == null) { log.info("Waiting for Hazelcast instance to be initialized..."); Thread.sleep(1000); if ((System.currentTimeMillis() - startTime) >= StratosConstants.HAZELCAST_INSTANCE_INIT_TIMEOUT) { throw new RuntimeException("Hazelcast instance was not initialized within " + StratosConstants.HAZELCAST_INSTANCE_INIT_TIMEOUT / 1000 + " seconds"); } } registerDistributedObjectProviderService(bundleContext); registerComponentStartUpSynchronizer(bundleContext); } catch (Exception e) { log.error(e); } } }; thread.setName("Distributed object provider registration thread"); thread.start(); } else { registerDistributedObjectProviderService(bundleContext); registerComponentStartUpSynchronizer(bundleContext); } // Register manager configuration service try { StratosConfiguration stratosConfiguration = CommonUtil.loadStratosConfiguration(); bundleContext.registerService(StratosConfiguration.class.getName(), stratosConfiguration, null); } catch (Exception ex) { String msg = "An error occurred while registering stratos configuration service"; log.error(msg, ex); } if (log.isInfoEnabled()) { log.info("Stratos common service component is activated"); } } catch (Exception e) { log.error("Error in activating stratos common service component", e); } } private void registerDistributedObjectProviderService(BundleContext bundleContext) { DistributedObjectProvider distributedObjectProvider = new HazelcastDistributedObjectProvider(); ServiceReferenceHolder.getInstance().setDistributedObjectProvider(distributedObjectProvider); bundleContext.registerService(DistributedObjectProvider.class, distributedObjectProvider, null); } private void registerComponentStartUpSynchronizer(BundleContext bundleContext) { ComponentStartUpSynchronizer componentStartUpSynchronizer = new ComponentStartUpSynchronizerImpl( ServiceReferenceHolder.getInstance().getDistributedObjectProvider()); bundleContext.registerService(ComponentStartUpSynchronizer.class, componentStartUpSynchronizer, null); } protected void deactivate(ComponentContext context) { log.debug("Stratos common service is deactivated"); } protected void setRegistryService(RegistryService registryService) { ServiceReferenceHolder.getInstance().setRegistryService(registryService); } protected void unsetRegistryService(RegistryService registryService) { setRegistryService(null); } protected void setRealmService(RealmService realmService) { ServiceReferenceHolder.getInstance().setRealmService(realmService); } protected void unsetRealmService(RealmService realmService) { ServiceReferenceHolder.getInstance().setRealmService(null); } public void setHazelcastInstance(HazelcastInstance hazelcastInstance) { ServiceReferenceHolder.getInstance().setHazelcastInstance(hazelcastInstance); } public void unsetHazelcastInstance(HazelcastInstance hazelcastInstance) { ServiceReferenceHolder.getInstance().setHazelcastInstance(null); } protected void setDistributedMapProvider(DistributedMapProvider mapProvider) { ServiceReferenceHolder.getInstance().setDistributedMapProvider(mapProvider); } protected void unsetDistributedMapProvider(DistributedMapProvider mapProvider) { ServiceReferenceHolder.getInstance().setDistributedMapProvider(null); } protected void setConfigurationContextService(ConfigurationContextService cfgCtxService) { ServiceReferenceHolder.getInstance() .setAxisConfiguration(cfgCtxService.getServerConfigContext().getAxisConfiguration()); } protected void unsetConfigurationContextService(ConfigurationContextService cfgCtxService) { ServiceReferenceHolder.getInstance().setAxisConfiguration(null); } }