content: /*
   * 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.activemq.artemis.ra.recovery;
  
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.Serializable;
  import java.lang.invoke.MethodHandles;
  import java.util.Map;
  import java.util.ServiceLoader;
  import java.util.Set;
  
  import org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory;
  import org.apache.activemq.artemis.service.extensions.xa.recovery.ActiveMQRegistry;
  import org.apache.activemq.artemis.service.extensions.xa.recovery.ActiveMQRegistryImpl;
  import org.apache.activemq.artemis.service.extensions.xa.recovery.XARecoveryConfig;
  import org.apache.activemq.artemis.utils.collections.ConcurrentHashSet;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public final class RecoveryManager implements Serializable {
  
     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
     private static final long serialVersionUID = 8959429342056727955L;
  
     private ActiveMQRegistry registry;
  
     private static final String RESOURCE_RECOVERY_CLASS_NAMES = "org.jboss.as.messaging.jms.AS7RecoveryRegistry;" + "org.jboss.as.integration.activemq.recovery.AS5RecoveryRegistry";
  
     private transient Set<XARecoveryConfig> resources = new ConcurrentHashSet<>();
  
     public void start(final boolean useAutoRecovery) {
        if (useAutoRecovery) {
           locateRecoveryRegistry();
        } else {
           registry = null;
        }
     }
  
     public XARecoveryConfig register(ActiveMQConnectionFactory factory,
                                      String userName,
                                      String password,
                                      Map<String, String> properties) {
        logger.debug("registering recovery for factory : {}", factory);
  
        XARecoveryConfig config = XARecoveryConfig.newConfig(factory, userName, password, properties);
        resources.add(config);
        if (registry != null) {
           registry.register(config);
        }
        return config;
     }
  
     public void unRegister(XARecoveryConfig resourceRecovery) {
        if (registry != null) {
           registry.unRegister(resourceRecovery);
        }
     }
  
     public void stop() {
        if (registry != null) {
           for (XARecoveryConfig recovery : resources) {
              registry.unRegister(recovery);
           }
           registry.stop();
        }
  
        resources.clear();
     }
  
     private void locateRecoveryRegistry() {
        String[] locatorClasses = RESOURCE_RECOVERY_CLASS_NAMES.split(";");
  
        for (String locatorClasse : locatorClasses) {
           try {
              ServiceLoader<ActiveMQRegistry> sl = ServiceLoader.load(ActiveMQRegistry.class, RecoveryManager.class.getClassLoader());
              if (sl.iterator().hasNext()) {
                 registry = sl.iterator().next();
              } else {
                 registry = ActiveMQRegistryImpl.getInstance();
              }
           } catch (Throwable e) {
              logger.debug("unable to load  recovery registry {}", locatorClasse, e);
           }
           if (registry != null) {
              break;
           }
        }
  
        if (registry != null) {
           logger.debug("Recovery Registry located = {}", registry);
        }
     }
  
     public Set<XARecoveryConfig> getResources() {
        return resources;
     }
  
     /*
      * Java serialization needs this in order to intialize transient fields
      */
     private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
        in.defaultReadObject();
        resources = new ConcurrentHashSet<>();
     }
  }
  