opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BlankTransactionServiceTracker.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.config.manager.impl.osgi;
   9
  10 import org.opendaylight.controller.config.api.jmx.CommitStatus;
  11 import org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl;
  12 import org.opendaylight.controller.config.spi.ModuleFactory;
  13 import org.osgi.framework.ServiceReference;
  14 import org.osgi.util.tracker.ServiceTrackerCustomizer;
  15 import org.slf4j.Logger;
  16 import org.slf4j.LoggerFactory;
  17
  18 import javax.management.ObjectName;
  19
  20 /**
  21  * Every time factory is added or removed, blank transaction is triggered to handle
  22  * {@link org.opendaylight.controller.config.spi.ModuleFactory#getDefaultModules(org.opendaylight.controller.config.api.DependencyResolverFactory)}
  23  * functionality.
  24  */
  25 public class BlankTransactionServiceTracker implements ServiceTrackerCustomizer<ModuleFactory, Object> {
  26     private static final Logger logger = LoggerFactory.getLogger(BlankTransactionServiceTracker.class);
  27
  28     private final ConfigRegistryImpl configRegistry;
  29
  30     public BlankTransactionServiceTracker(ConfigRegistryImpl configRegistry) {
  31         this.configRegistry = configRegistry;
  32     }
  33
  34     @Override
  35     public Object addingService(ServiceReference<ModuleFactory> moduleFactoryServiceReference) {
  36         blankTransaction();
  37         return null;
  38     }
  39
  40     private void blankTransaction() {
  41         // create transaction
  42         ObjectName tx = configRegistry.beginConfig();
  43         CommitStatus commitStatus = configRegistry.commitConfig(tx);
  44         logger.debug("Committed blank transaction with status {}", commitStatus);
  45     }
  46
  47     @Override
  48     public void modifiedService(ServiceReference<ModuleFactory> moduleFactoryServiceReference, Object o) {
  49         blankTransaction();
  50     }
  51
  52     @Override
  53     public void removedService(ServiceReference<ModuleFactory> moduleFactoryServiceReference, Object o) {
  54         blankTransaction();
  55     }
  56 }