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