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 import java.util.concurrent.BlockingQueue;
  15 import java.util.concurrent.LinkedBlockingQueue;
  16 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
  17 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  18 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  19 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  20 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  21 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 final class OperationProcessor implements AutoCloseable, Runnable, TransactionChainListener {
  26     private static final Logger LOG = LoggerFactory.getLogger(OperationProcessor.class);
  27     private static final int MAX_TRANSACTION_OPERATIONS = 100;
  28     private static final int OPERATION_QUEUE_DEPTH = 500;
  29
  30     private final BlockingQueue<TopologyOperation> queue = new LinkedBlockingQueue<>(OPERATION_QUEUE_DEPTH);
  31     private final DataBroker dataBroker;
  32     private final BindingTransactionChain transactionChain;
  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         try {
  50             for (; ; ) {
  51                 TopologyOperation op = queue.take();
  52
  53                 LOG.debug("New operations available, starting transaction");
  54                 final ReadWriteTransaction tx = transactionChain.newReadWriteTransaction();
  55
  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                 } while (op != null);
  68
  69                 LOG.debug("Processed {} operations, submitting transaction", ops);
  70
  71                 final CheckedFuture txResultFuture = tx.submit();
  72                 Futures.addCallback(txResultFuture, new FutureCallback() {
  73                     @Override
  74                     public void onSuccess(Object o) {
  75                         LOG.debug("Topology export successful for tx :{}", tx.getIdentifier());
  76                     }
  77
  78                     @Override
  79                     public void onFailure(Throwable throwable) {
  80                         LOG.error("Topology export transaction {} failed", tx.getIdentifier(), throwable.getCause());
  81                     }
  82                 });
  83             }
  84         } catch (InterruptedException e) {
  85             LOG.info("Interrupted processing, terminating", e);
  86         }
  87
  88         // Drain all events, making sure any blocked threads are unblocked
  89         while (!queue.isEmpty()) {
  90             queue.poll();
  91         }
  92     }
  93
  94     @Override
  95     public void onTransactionChainFailed(TransactionChain<?, ?> chain, AsyncTransaction<?, ?> transaction, Throwable cause) {
  96         LOG.error("Failed to export Topology manager operations, Transaction {} failed.", transaction.getIdentifier(), cause);
  97     }
  98
  99     @Override
 100     public void onTransactionChainSuccessful(TransactionChain<?, ?> chain) {
 101         //NOOP
 102     }
 103
 104     @Override
 105     public void close() throws Exception {
 106         if (transactionChain != null) {
 107             transactionChain.close();
 108         }
 109
 110     }
 111 }