pcep/topology-provider/src/main/java/org/opendaylight/bgpcep/pcep/topology/provider/PCEPRequest.java

   1 /*
   2  * Copyright (c) 2013 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.bgpcep.pcep.topology.provider;
   9
  10 import com.google.common.base.Stopwatch;
  11 import com.google.common.util.concurrent.ListenableFuture;
  12 import com.google.common.util.concurrent.SettableFuture;
  13 import java.util.Timer;
  14 import java.util.concurrent.TimeUnit;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.OperationResult;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.lsp.metadata.Metadata;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 final class PCEPRequest {
  21     enum State {
  22         UNSENT,
  23         UNACKED,
  24         DONE,
  25     }
  26
  27     private static final Logger LOG = LoggerFactory.getLogger(PCEPRequest.class);
  28     private final SettableFuture<OperationResult> future;
  29     private final Metadata metadata;
  30     private volatile State state;
  31     private final Stopwatch stopwatch;
  32     private final Timer timer;
  33
  34     PCEPRequest(final Metadata metadata) {
  35         this.future = SettableFuture.create();
  36         this.metadata = metadata;
  37         this.state = State.UNSENT;
  38         this.stopwatch = Stopwatch.createStarted();
  39         this.timer = new Timer();
  40     }
  41
  42     protected ListenableFuture<OperationResult> getFuture() {
  43         return this.future;
  44     }
  45
  46     public Metadata getMetadata() {
  47         return this.metadata;
  48     }
  49
  50     public State getState() {
  51         return this.state;
  52     }
  53
  54     Timer getTimer() {
  55         return this.timer;
  56     }
  57
  58     synchronized void done(final OperationResult result) {
  59         if (this.state != State.DONE) {
  60             LOG.debug("Request went from {} to {}", this.state, State.DONE);
  61             this.state = State.DONE;
  62             this.timer.cancel();
  63             this.future.set(result);
  64         }
  65     }
  66
  67     synchronized void done() {
  68         OperationResult result;
  69         switch (this.state) {
  70         case UNSENT:
  71             result = OperationResults.UNSENT;
  72             break;
  73         case UNACKED:
  74             result = OperationResults.NOACK;
  75             break;
  76         case DONE:
  77             return;
  78         default:
  79             return;
  80         }
  81         done(result);
  82     }
  83
  84     synchronized void sent() {
  85         if (this.state == State.UNSENT) {
  86             LOG.debug("Request went from {} to {}", this.state, State.UNACKED);
  87             this.state = State.UNACKED;
  88         }
  89     }
  90
  91     long getElapsedMillis() {
  92         return this.stopwatch.elapsed(TimeUnit.MILLISECONDS);
  93     }
  94 }