pcep/topology/topology-spi/src/main/java/org/opendaylight/bgpcep/pcep/topology/spi/AbstractInstructionExecutor.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.spi;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.util.concurrent.FutureCallback;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import com.google.common.util.concurrent.MoreExecutors;
  16 import org.opendaylight.bgpcep.programming.spi.Instruction;
  17 import org.opendaylight.bgpcep.programming.spi.InstructionScheduler;
  18 import org.opendaylight.bgpcep.programming.spi.SchedulerException;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionStatus;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.SubmitInstructionInput;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.submit.instruction.output.result.FailureCase;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.submit.instruction.output.result.FailureCaseBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.OperationResult;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 public abstract class AbstractInstructionExecutor implements FutureCallback<Instruction> {
  28
  29     private static final class InstructionCallback implements FutureCallback<OperationResult> {
  30
  31         private final Instruction insn;
  32
  33         public InstructionCallback(final Instruction insn) {
  34             this.insn = insn;
  35         }
  36
  37         @Override
  38         public void onSuccess(final OperationResult result) {
  39             if (result.getFailure() != null) {
  40                 switch (result.getFailure()) {
  41                 case Failed:
  42                 case NoAck:
  43                     this.insn.executionCompleted(InstructionStatus.Failed, null);
  44                     break;
  45                 case Unsent:
  46                     this.insn.executionCompleted(InstructionStatus.Cancelled, null);
  47                     break;
  48                 default:
  49                     break;
  50                 }
  51             } else {
  52                 this.insn.executionCompleted(InstructionStatus.Successful, null);
  53             }
  54         }
  55
  56         @Override
  57         public void onFailure(final Throwable t) {
  58             this.insn.executionCompleted(InstructionStatus.Failed, null);
  59         }
  60     }
  61
  62     private static final Logger LOG = LoggerFactory.getLogger(AbstractInstructionExecutor.class);
  63     private final SubmitInstructionInput input;
  64
  65     protected AbstractInstructionExecutor(final SubmitInstructionInput input) {
  66         this.input = requireNonNull(input);
  67     }
  68
  69     public final SubmitInstructionInput getInput() {
  70         return this.input;
  71     }
  72
  73     public static FailureCase schedule(final InstructionScheduler scheduler, final AbstractInstructionExecutor fwd) {
  74         final ListenableFuture<Instruction> s;
  75         try {
  76             s = scheduler.scheduleInstruction(fwd.getInput());
  77         } catch (final SchedulerException e) {
  78             LOG.info("Instuction {} failed to schedule", e.getMessage(), e);
  79             return new FailureCaseBuilder().setFailure(e.getFailure()).build();
  80         }
  81         Futures.addCallback(s, fwd, MoreExecutors.directExecutor());
  82         return null;
  83     }
  84
  85     protected abstract ListenableFuture<OperationResult> invokeOperation();
  86
  87     @Override
  88     public void onSuccess(final Instruction insn) {
  89         if (insn.checkedExecutionStart()) {
  90             final ListenableFuture<OperationResult> s = invokeOperation();
  91             Futures.addCallback(s, new InstructionCallback(insn), MoreExecutors.directExecutor());
  92         }
  93     }
  94
  95     @Override
  96     public void onFailure(final Throwable t) {
  97         LOG.debug("Instruction {} cancelled", this.input, t);
  98     }
  99 }