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     private volatile boolean finishing = false;
  33
  34     OperationProcessor(final DataBroker dataBroker) {
  35         this.dataBroker = Preconditions.checkNotNull(dataBroker);
  36         transactionChain = this.dataBroker.createTransactionChain(this);
  37     }
  38
  39     void enqueueOperation(final TopologyOperation task) {
  40         try {
  41             queue.put(task);
  42         } catch (InterruptedException e) {
  43             LOG.warn("Interrupted while submitting task {}", task, e);
  44         }
  45     }
  46
  47     @Override
  48     public void run() {
  49             while (!finishing) {
  50                 try {
  51                     TopologyOperation op = queue.take();
  52
  53                     LOG.debug("New {} operation available, starting transaction", op);
  54
  55                     final ReadWriteTransaction tx = transactionChain.newReadWriteTransaction();
  56
  57                     int ops = 0;
  58                     do {
  59                         op.applyOperation(tx);
  60
  61                         ops++;
  62                         if (ops < MAX_TRANSACTION_OPERATIONS) {
  63                             op = queue.poll();
  64                         } else {
  65                             op = null;
  66                         }
  67
  68                         LOG.debug("Next operation {}", op);
  69                     } while (op != null);
  70
  71                     LOG.debug("Processed {} operations, submitting transaction", ops);
  72
  73                     try {
  74                         tx.submit().checkedGet();
  75                     } catch (final TransactionCommitFailedException e) {
  76                         LOG.warn("Stat DataStoreOperation unexpected State!", e);
  77                         transactionChain.close();
  78                         transactionChain = dataBroker.createTransactionChain(this);
  79                         cleanDataStoreOperQueue();
  80                     }
  81
  82                 } catch (final IllegalStateException e) {
  83                     LOG.warn("Stat DataStoreOperation unexpected State!", e);
  84                     transactionChain.close();
  85                     transactionChain = dataBroker.createTransactionChain(this);
  86                     cleanDataStoreOperQueue();
  87                 } catch (final InterruptedException e) {
  88                     LOG.warn("Stat Manager DS Operation thread interupted!", e);
  89                     finishing = true;
  90                 } catch (final Exception e) {
  91                     LOG.warn("Stat DataStore Operation executor fail!", e);
  92                 }
  93             }
  94         // Drain all events, making sure any blocked threads are unblocked
  95         cleanDataStoreOperQueue();
  96     }
  97
  98     private void cleanDataStoreOperQueue() {
  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         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 }