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 com.google.common.base.Preconditions;
  11 import java.util.concurrent.BlockingQueue;
  12 import java.util.concurrent.LinkedBlockingQueue;
  13 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  16 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  17 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  18 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  19 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 final class OperationProcessor implements AutoCloseable, Runnable, TransactionChainListener {
  24     private static final Logger LOG = LoggerFactory.getLogger(OperationProcessor.class);
  25     private static final int MAX_TRANSACTION_OPERATIONS = 100;
  26     private static final int OPERATION_QUEUE_DEPTH = 500;
  27
  28     private final BlockingQueue<TopologyOperation> queue = new LinkedBlockingQueue<>(OPERATION_QUEUE_DEPTH);
  29     private final DataBroker dataBroker;
  30     private BindingTransactionChain transactionChain;
  31     private volatile boolean finishing = false;
  32
  33     OperationProcessor(final DataBroker dataBroker) {
  34         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  35         transactionChain = this.dataBroker.createTransactionChain(this);
  36     }
  37
  38     void enqueueOperation(final TopologyOperation task) {
  39         try {
  40             queue.put(task);
  41         } catch (InterruptedException e) {
  42             LOG.warn("Interrupted while submitting task {}", task, e);
  43         }
  44     }
  45
  46     @Override
  47     public void run() {
  48             while (!finishing) {
  49                 try {
  50                     TopologyOperation op = queue.take();
  51
  52                     LOG.debug("New {} operation available, starting transaction", op);
  53
  54                     final ReadWriteTransaction tx = transactionChain.newReadWriteTransaction();
  55
  56                     int ops = 0;
  57                     do {
  58                         op.applyOperation(tx);
  59
  60                         ops++;
  61                         if (ops < MAX_TRANSACTION_OPERATIONS) {
  62                             op = queue.poll();
  63                         } else {
  64                             op = null;
  65                         }
  66
  67                         LOG.debug("Next operation {}", op);
  68                     } while (op != null);
  69
  70                     LOG.debug("Processed {} operations, submitting transaction", ops);
  71
  72                     try {
  73                         tx.submit().checkedGet();
  74                     } catch (final TransactionCommitFailedException e) {
  75                         LOG.warn("Stat DataStoreOperation unexpected State!", e);
  76                         transactionChain.close();
  77                         transactionChain = dataBroker.createTransactionChain(this);
  78                         cleanDataStoreOperQueue();
  79                     }
  80
  81                 } catch (final IllegalStateException e) {
  82                     LOG.warn("Stat DataStoreOperation unexpected State!", e);
  83                     transactionChain.close();
  84                     transactionChain = dataBroker.createTransactionChain(this);
  85                     cleanDataStoreOperQueue();
  86                 } catch (final InterruptedException e) {
  87                     LOG.warn("Stat Manager DS Operation thread interupted!", e);
  88                     finishing = true;
  89                 } catch (final Exception e) {
  90                     LOG.warn("Stat DataStore Operation executor fail!", e);
  91                 }
  92             }
  93         // Drain all events, making sure any blocked threads are unblocked
  94         cleanDataStoreOperQueue();
  95     }
  96
  97     private void cleanDataStoreOperQueue() {
  98         while (!queue.isEmpty()) {
  99             queue.poll();
 100         }
 101     }
 102
 103     @Override
 104     public void onTransactionChainFailed(TransactionChain<?, ?> chain, AsyncTransaction<?, ?> transaction, Throwable cause) {
 105         LOG.warn("Failed to export Topology manager operations, Transaction {} failed: {}", transaction.getIdentifier(), cause.getMessage());
 106         LOG.debug("Failed to export Topology manager operations.. ", cause);
 107         transactionChain.close();
 108         transactionChain = dataBroker.createTransactionChain(this);
 109         cleanDataStoreOperQueue();
 110     }
 111
 112     @Override
 113     public void onTransactionChainSuccessful(TransactionChain<?, ?> chain) {
 114         //NOOP
 115     }
 116
 117     @Override
 118     public void close() throws Exception {
 119         if (transactionChain != null) {
 120             transactionChain.close();
 121         }
 122
 123     }
 124 }