programming/impl/src/main/java/org/opendaylight/bgpcep/programming/impl/Instruction.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.programming.impl;
   9
  10 import io.netty.util.Timeout;
  11
  12 import java.util.ArrayList;
  13 import java.util.List;
  14
  15 import org.opendaylight.bgpcep.programming.spi.ExecutionResult;
  16 import org.opendaylight.bgpcep.programming.spi.InstructionExecutor;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev130930.InstructionId;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev130930.InstructionStatus;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev130930.instruction.status.changed.Details;
  20
  21 import com.google.common.base.Preconditions;
  22 import com.google.common.util.concurrent.ListenableFuture;
  23
  24 final class Instruction {
  25         private final List<Instruction> dependants = new ArrayList<>();
  26         private final InstructionExecutor executor;
  27         private final List<Instruction> dependencies;
  28         private final InstructionId id;
  29         private volatile InstructionStatus status = InstructionStatus.Queued;
  30         private Timeout timeout;
  31
  32         Instruction(final InstructionId id, final InstructionExecutor executor, final List<Instruction> dependencies, final Timeout timeout) {
  33                 this.id = Preconditions.checkNotNull(id);
  34                 this.executor = Preconditions.checkNotNull(executor);
  35                 this.dependencies = Preconditions.checkNotNull(dependencies);
  36                 this.timeout = Preconditions.checkNotNull(timeout);
  37         }
  38
  39         InstructionId getId() {
  40                 return id;
  41         }
  42
  43         InstructionStatus getStatus() {
  44                 return status;
  45         }
  46
  47         ListenableFuture<ExecutionResult<Details>> execute() {
  48                 return executor.execute();
  49         }
  50
  51         void setStatus(final InstructionStatus status) {
  52                 this.status = status;
  53         }
  54
  55         synchronized void cancel() {
  56                 if (timeout != null) {
  57                         timeout.cancel();
  58                         timeout = null;
  59                 }
  60         }
  61
  62         synchronized void completed() {
  63                 timeout = null;
  64         }
  65
  66         synchronized void addDependant(final Instruction d) {
  67                 dependants.add(d);
  68         }
  69
  70         List<Instruction> getDependencies() {
  71                 return dependencies;
  72         }
  73
  74         List<Instruction> getDependants() {
  75                 return dependants;
  76         }
  77 }