applications/forwardingrules-sync/src/main/java/org/opendaylight/openflowplugin/applications/frsync/impl/SyncReactorRetryDecorator.java

   1 /**
   2  * Copyright (c) 2016 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
   9 package org.opendaylight.openflowplugin.applications.frsync.impl;
  10
  11 import com.google.common.base.Function;
  12 import com.google.common.util.concurrent.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  15 import org.opendaylight.openflowplugin.applications.frsync.SyncReactor;
  16 import org.opendaylight.openflowplugin.applications.frsync.util.PathUtil;
  17 import org.opendaylight.openflowplugin.applications.frsync.util.RetryRegistry;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  20 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 /**
  25  * Adding retry mechanism in case of unsuccessful syncup.
  26  */
  27 public class SyncReactorRetryDecorator implements SyncReactor{
  28
  29     private static final Logger LOG = LoggerFactory.getLogger(SyncReactorRetryDecorator.class);
  30
  31     private final SyncReactor delegate;
  32     private final RetryRegistry retryRegistry;
  33
  34     public SyncReactorRetryDecorator (final SyncReactor delegate, RetryRegistry retryRegistry) {
  35         this.delegate = delegate;
  36         this.retryRegistry = retryRegistry;
  37     }
  38
  39     public ListenableFuture<Boolean> syncup (final InstanceIdentifier<FlowCapableNode> flowcapableNodePath,
  40                                              final FlowCapableNode configTree, final FlowCapableNode operationalTree,
  41                                              final LogicalDatastoreType dsType) throws InterruptedException {
  42
  43         final NodeId nodeId = PathUtil.digNodeId(flowcapableNodePath);
  44         LOG.trace("syncup retry {}", nodeId.getValue());
  45
  46         if (dsType == LogicalDatastoreType.CONFIGURATION && retryRegistry.isRegistered(nodeId)) {
  47             LOG.trace("Config change ignored because device is in retry [{}]", nodeId);
  48             return Futures.immediateFuture(Boolean.FALSE);
  49         }
  50
  51         ListenableFuture<Boolean> syncupResult = delegate.syncup(flowcapableNodePath, configTree, operationalTree, dsType);
  52
  53         return Futures.transform(syncupResult, new Function<Boolean, Boolean>() {
  54             @Override
  55             public Boolean apply(Boolean result) {
  56                 LOG.trace("syncup ret in retry {}", result);
  57                 if (result) {
  58                     retryRegistry.unregisterIfRegistered(nodeId);
  59                     return true;
  60                 } else {
  61                     retryRegistry.register(nodeId);
  62                     // TODO  elicit statistics gathering if not running actually
  63                     // triggerStatisticsGathering(nodeId);
  64                     return false;
  65                 }
  66             }
  67         });
  68     }
  69 }