openflowplugin-impl/src/main/java/org/opendaylight/openflowplugin/impl/device/DeviceTransactionChainManagerProvider.java

   1 /*
   2  * Copyright (c) 2015 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.impl.device;
  10
  11 import java.util.HashMap;
  12 import java.util.Map;
  13 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  14 import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  16 import org.opendaylight.yangtools.concepts.Registration;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 /**
  21  * Created by Martin Bobak &lt;mbobak@cisco.com&gt; on 2.6.2015.
  22  */
  23 public class DeviceTransactionChainManagerProvider {
  24
  25
  26     private static final Logger LOG = LoggerFactory.getLogger(DeviceTransactionChainManagerProvider.class);
  27     private static final Map<NodeId, TransactionChainManager> txChManagers = new HashMap<>();
  28
  29     public TransactionChainManager provideTransactionChainManagerOrWaitForNotification(final ConnectionContext connectionContext,
  30                                                                                        final DataBroker dataBroker,
  31                                                                                        final ReadyForNewTransactionChainHandler readyForNewTransactionChainHandler) {
  32         final NodeId nodeId = connectionContext.getNodeId();
  33         synchronized (this) {
  34             TransactionChainManager transactionChainManager = txChManagers.get(nodeId);
  35             if (null == transactionChainManager) {
  36                 LOG.info("Creating new transaction chain for device {}", nodeId.toString());
  37                 Registration registration = new Registration() {
  38                     @Override
  39                     public void close() throws Exception {
  40                         txChManagers.remove(nodeId);
  41                     }
  42                 };
  43                 transactionChainManager = new TransactionChainManager(dataBroker, connectionContext, registration);
  44                 txChManagers.put(nodeId, transactionChainManager);
  45                 return transactionChainManager;
  46             } else {
  47                 try {
  48                     if (!transactionChainManager.attemptToRegisterHandler(readyForNewTransactionChainHandler)) {
  49                         if (TransactionChainManager.TransactionChainManagerStatus.WORKING.equals(transactionChainManager.getTransactionChainManagerStatus())) {
  50                             LOG.info("There already exists one handler for connection described as {}. Connection is working will not try again.", nodeId);
  51                             connectionContext.closeConnection(false);
  52                         } else {
  53                             LOG.info("There already exists one handler for connection described as {}. Transaction chain manager is in state {}. Will try again.",
  54                                     nodeId,
  55                                     transactionChainManager.getTransactionChainManagerStatus());
  56                             readyForNewTransactionChainHandler.onReadyForNewTransactionChain(connectionContext);
  57                         }
  58                     }
  59                 } catch (Exception e) {
  60                     LOG.info("Transaction closed handler registration for node {} failed because we most probably hit previous transaction chain  manager's close process. Will try again.", nodeId);
  61                     readyForNewTransactionChainHandler.onReadyForNewTransactionChain(connectionContext);
  62                 }
  63             }
  64         }
  65         return null;
  66     }
  67
  68
  69 }