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 java.util.concurrent.BlockingQueue;
  11 import java.util.concurrent.ExecutionException;
  12 import java.util.concurrent.LinkedBlockingQueue;
  13
  14 import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
  15 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
  16 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
  17 import org.opendaylight.yangtools.yang.common.RpcResult;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 import com.google.common.base.Preconditions;
  22
  23 final class OperationProcessor implements Runnable {
  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     // FIXME: Flow capable topology exporter should use transaction chaining API
  30     private final DataProviderService dataService;
  31
  32     OperationProcessor(final DataProviderService dataService) {
  33         this.dataService = Preconditions.checkNotNull(dataService);
  34     }
  35
  36     void enqueueOperation(final TopologyOperation task) {
  37         try {
  38             queue.put(task);
  39         } catch (InterruptedException e) {
  40             LOG.warn("Interrupted while submitting task {}", task, e);
  41         }
  42     }
  43
  44     @Override
  45     public void run() {
  46         try {
  47             for (;;) {
  48                 TopologyOperation op = queue.take();
  49
  50                 LOG.debug("New operations available, starting transaction");
  51                 final DataModificationTransaction tx = dataService.beginTransaction();
  52
  53                 int ops = 0;
  54                 do {
  55                     op.applyOperation(tx);
  56
  57                     ops++;
  58                     if (ops < MAX_TRANSACTION_OPERATIONS) {
  59                         op = queue.poll();
  60                     } else {
  61                         op = null;
  62                     }
  63                 } while (op != null);
  64
  65                 LOG.debug("Processed {} operations, submitting transaction", ops);
  66
  67                 try {
  68                     final RpcResult<TransactionStatus> s = tx.commit().get();
  69                     if (!s.isSuccessful()) {
  70                         LOG.error("Topology export failed for Tx:{}", tx.getIdentifier());
  71                     }
  72                 } catch (ExecutionException e) {
  73                     LOG.error("Topology export transaction {} failed", tx.getIdentifier(), e.getCause());
  74                 }
  75             }
  76         } catch (InterruptedException e) {
  77             LOG.info("Interrupted processing, terminating", e);
  78         }
  79
  80         // Drain all events, making sure any blocked threads are unblocked
  81         while (!queue.isEmpty()) {
  82             queue.poll();
  83         }
  84     }
  85 }