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.openflowplugin.applications.frsync.SyncReactor;
  15 import org.opendaylight.openflowplugin.applications.frsync.util.PathUtil;
  16 import org.opendaylight.openflowplugin.applications.frsync.util.ReconciliationRegistry;
  17 import org.opendaylight.openflowplugin.applications.frsync.util.SyncupEntry;
  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 ReconciliationRegistry reconciliationRegistry;
  33
  34     public SyncReactorRetryDecorator(final SyncReactor delegate, final ReconciliationRegistry reconciliationRegistry) {
  35         this.delegate = delegate;
  36         this.reconciliationRegistry = reconciliationRegistry;
  37     }
  38
  39     public ListenableFuture<Boolean> syncup(final InstanceIdentifier<FlowCapableNode> flowcapableNodePath,
  40                                             final SyncupEntry syncupEntry) throws InterruptedException {
  41
  42         final NodeId nodeId = PathUtil.digNodeId(flowcapableNodePath);
  43         if (syncupEntry.isOptimizedConfigDelta() && reconciliationRegistry.isRegistered(nodeId)) {
  44             LOG.debug("Config change ignored because {} is in reconcile.", nodeId.getValue());
  45             return Futures.immediateFuture(Boolean.FALSE);
  46         }
  47
  48         ListenableFuture<Boolean> syncupResult = delegate.syncup(flowcapableNodePath,syncupEntry);
  49
  50         return Futures.transform(syncupResult, new Function<Boolean, Boolean>() {
  51             @Override
  52             public Boolean apply(Boolean result) {
  53                 if (result) {
  54                     reconciliationRegistry.unregisterIfRegistered(nodeId);
  55                     return true;
  56                 } else {
  57                     reconciliationRegistry.register(nodeId);
  58                     return false;
  59                 }
  60             }
  61         });
  62     }
  63 }