nemo-impl/src/main/java/org/opendaylight/nemo/intent/condition/ConditionMonitor.java

   1 /*
   2  * Copyright (c) 2015 Huawei, 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
   9 package org.opendaylight.nemo.intent.condition;
  10
  11 import org.opendaylight.nemo.intent.IntentResolver;
  12 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.nemo.common.rev151010.UserId;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.nemo.operation.rev151010.condition.instance.ConditionSegment;
  14 import org.slf4j.Logger;
  15 import org.slf4j.LoggerFactory;
  16 import java.util.List;
  17 import java.util.TimerTask;
  18
  19 /**
  20  * Created by hj on 11/19/15.
  21  * TimerTask for one condition.
  22  */
  23 public class ConditionMonitor extends TimerTask {
  24     private static Logger log = LoggerFactory.getLogger(ConditionMonitor.class);
  25     private List<ConditionSegment> conditionSegments;
  26     //Handle operation when condition state changed
  27     private IntentResolver intentResolver;
  28     private boolean preState;
  29     private UserId userId;
  30
  31     public ConditionMonitor(IntentResolver intentResolver, UserId userId, List<ConditionSegment> conditionSegments) {
  32         this.conditionSegments = conditionSegments;
  33         this.intentResolver = intentResolver;
  34         this.userId = userId;
  35         preState = ConditionDeterminer.isConditionMet(conditionSegments);
  36     }
  37
  38     @Override
  39     public void run() {
  40         boolean currentState = ConditionDeterminer.isConditionMet(conditionSegments);
  41         if (currentState != preState) {
  42             try {
  43                 intentResolver.resolveIntent(userId);
  44             } catch (Exception e) {
  45                 //TODO Auto-generated catch block
  46                 log.error("Exception:",e);
  47             }
  48             preState = currentState;
  49         }
  50     }
  51 }