gerrit.onap Code Review - msb/apigateway.git/blob

   1 /*******************************************************************************
   2  * Copyright 2016-2017 ZTE, Inc. and others.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  ******************************************************************************/
  16 package org.onap.msb.apiroute.wrapper.consulextend.expose;
  17
  18 import java.math.BigInteger;
  19 import java.util.concurrent.atomic.AtomicReference;
  20
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 import com.orbitz.consul.model.ConsulResponse;
  25
  26 public class ConsulIndexFilter<T> implements WatchTask.Filter<T> {
  27
  28         private final static Logger LOGGER = LoggerFactory
  29                         .getLogger(ConsulIndexFilter.class);
  30
  31         private final AtomicReference<BigInteger> latestIndex = new AtomicReference<BigInteger>(
  32                         null);
  33
  34         @Override
  35         public boolean filter(final ConsulResponse<T> object) {
  36                 // TODO Auto-generated method stub
  37                 return isChanged(object);
  38         }
  39
  40         private boolean isChanged(final ConsulResponse<T> consulResponse) {
  41
  42                 if (consulResponse != null && consulResponse.getIndex() != null
  43                                 && !consulResponse.getIndex().equals(latestIndex.get())) {
  44
  45                         if(LOGGER.isDebugEnabled()){
  46                                 //第一次不打印
  47                                 if (latestIndex.get()!=null) {
  48                                         LOGGER.debug("consul index compare:new-"
  49                                                         + consulResponse.getIndex() + "  old-"
  50                                                         + latestIndex.get());
  51                                 }
  52
  53                         }
  54
  55                         this.latestIndex.set(consulResponse.getIndex());
  56                         return true;
  57                 }
  58
  59                 return false;
  60         }
  61
  62
  63 }