opendaylight/md-sal/topology-manager/src/main/java/org/opendaylight/md/controller/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.md.controller.topology.manager;
   9
  10 import com.google.common.base.Preconditions;
  11 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
  12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  13 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  14 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  15 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  16 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  17 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 import java.util.concurrent.BlockingQueue;
  22 import java.util.concurrent.LinkedBlockingQueue;
  23
  24 final class OperationProcessor implements AutoCloseable, Runnable, TransactionChainListener {
  25     private static final Logger LOG = LoggerFactory.getLogger(OperationProcessor.class);
  26     private static final int MAX_TRANSACTION_OPERATIONS = 100;
  27     private static final int OPERATION_QUEUE_DEPTH = 500;
  28
  29     private final BlockingQueue<TopologyOperation> queue = new LinkedBlockingQueue<>(OPERATION_QUEUE_DEPTH);
  30     private final DataBroker dataBroker;
  31     private BindingTransactionChain transactionChain;
  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         try {
  49             for (; ; ) {
  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         } catch (final Exception e) {
  89             LOG.warn("Stat DataStore Operation executor fail!", e);
  90         }
  91
  92         // Drain all events, making sure any blocked threads are unblocked
  93         cleanDataStoreOperQueue();
  94
  95     }
  96
  97     private void cleanDataStoreOperQueue() {
  98         // Drain all events, making sure any blocked threads are unblocked
  99         while (!queue.isEmpty()) {
 100             queue.poll();
 101         }
 102     }
 103
 104     @Override
 105     public void onTransactionChainFailed(TransactionChain<?, ?> chain, AsyncTransaction<?, ?> transaction, Throwable cause) {
 106         LOG.error("Failed to export Topology manager operations, Transaction {} failed.", transaction.getIdentifier(), cause);
 107     }
 108
 109     @Override
 110     public void onTransactionChainSuccessful(TransactionChain<?, ?> chain) {
 111         //NOOP
 112     }
 113
 114     @Override
 115     public void close() throws Exception {
 116         if (transactionChain != null) {
 117             transactionChain.close();
 118         }
 119
 120     }
 121 }