applications/topology-manager/src/main/java/org/opendaylight/openflowplugin/applications/topology/manager/OperationProcessor.java

   1 /*
   2  * Copyright (c) 2014 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.openflowplugin.applications.topology.manager;
   9
  10 import java.util.concurrent.BlockingQueue;
  11 import java.util.concurrent.LinkedBlockingQueue;
  12 import javax.annotation.PostConstruct;
  13 import javax.annotation.PreDestroy;
  14 import javax.inject.Inject;
  15 import javax.inject.Singleton;
  16 import org.opendaylight.mdsal.binding.api.DataBroker;
  17 import org.opendaylight.openflowplugin.common.txchain.TransactionChainManager;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 @Singleton
  22 public final class OperationProcessor implements AutoCloseable, Runnable {
  23     private static final Logger LOG = LoggerFactory.getLogger(OperationProcessor.class);
  24     private static final int MAX_TRANSACTION_OPERATIONS = 100;
  25     private static final int OPERATION_QUEUE_DEPTH = 500;
  26     private static final String TOPOLOGY_MANAGER = "ofp-topo-processor";
  27
  28     private final BlockingQueue<TopologyOperation> queue = new LinkedBlockingQueue<>(OPERATION_QUEUE_DEPTH);
  29     private final Thread thread;
  30     private final TransactionChainManager transactionChainManager;
  31     private volatile boolean finishing = false;
  32
  33     @Inject
  34     public OperationProcessor(final DataBroker dataBroker) {
  35         transactionChainManager = new TransactionChainManager(dataBroker, TOPOLOGY_MANAGER);
  36         transactionChainManager.activateTransactionManager();
  37         transactionChainManager.initialSubmitWriteTransaction();
  38
  39         thread = new Thread(this);
  40         thread.setDaemon(true);
  41         thread.setName("ofp-topo-expo-" + FlowCapableTopologyProvider.TOPOLOGY_ID);
  42     }
  43
  44     void enqueueOperation(final TopologyOperation task) {
  45         try {
  46             queue.put(task);
  47         } catch (InterruptedException e) {
  48             LOG.warn("Interrupted while submitting task {}", task, e);
  49         }
  50     }
  51
  52     @PostConstruct
  53     public void start() {
  54         thread.start();
  55     }
  56
  57     @Override
  58     public void run() {
  59         while (!finishing) {
  60             try {
  61                 TopologyOperation op = queue.take();
  62
  63                 LOG.debug("New {} operation available, starting transaction", op);
  64
  65                 int ops = 0;
  66                 do {
  67                     op.applyOperation(transactionChainManager);
  68
  69                     ops++;
  70                     if (ops < MAX_TRANSACTION_OPERATIONS) {
  71                         op = queue.poll();
  72                     } else {
  73                         op = null;
  74                     }
  75
  76                     LOG.debug("Next operation {}", op);
  77                 } while (op != null);
  78
  79                 LOG.debug("Processed {} operations, submitting transaction", ops);
  80                 if (!transactionChainManager.submitTransaction()) {
  81                     cleanDataStoreOperQueue();
  82                 }
  83             } catch (final InterruptedException e) {
  84                 // This should mean we're shutting down.
  85                 LOG.debug("Stat Manager DS Operation thread interrupted!", e);
  86                 finishing = true;
  87             }
  88         }
  89         // Drain all events, making sure any blocked threads are unblocked
  90         cleanDataStoreOperQueue();
  91     }
  92
  93     private void cleanDataStoreOperQueue() {
  94         while (!queue.isEmpty()) {
  95             queue.poll();
  96         }
  97     }
  98
  99     @Override
 100     @PreDestroy
 101     public void close() {
 102         thread.interrupt();
 103         try {
 104             thread.join();
 105         } catch (InterruptedException e) {
 106             LOG.debug("Join of thread {} was interrupted", thread.getName(), e);
 107         }
 108
 109         transactionChainManager.close();
 110
 111         LOG.debug("OperationProcessor closed");
 112     }
 113 }