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.util.concurrent.CopyOnWriteArrayList;
  19
  20 import org.onap.msb.apiroute.wrapper.consulextend.cache.ConsulCache;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 import com.orbitz.consul.model.ConsulResponse;
  25
  26 public abstract class WatchTask<T> {
  27         private final CopyOnWriteArrayList<Filter<T>> filters = new CopyOnWriteArrayList<Filter<T>>();
  28         private final CopyOnWriteArrayList<Handler<T>> handlers = new CopyOnWriteArrayList<Handler<T>>();
  29         private final static Logger LOGGER = LoggerFactory
  30                         .getLogger(WatchTask.class);
  31
  32         //start
  33         public abstract boolean startWatch();
  34
  35         //stop
  36         public abstract boolean stopWatch();
  37
  38         // filters
  39         public interface Filter<T> {
  40                 public boolean filter(final ConsulResponse<T> object);
  41         }
  42
  43         public boolean addFilter(Filter<T> filter) {
  44                 boolean added = filters.add(filter);
  45                 return added;
  46         }
  47
  48         public void removeAllFilter() {
  49                 filters.clear();
  50         }
  51
  52
  53         public final CopyOnWriteArrayList<Filter<T>> getAllFilters(){
  54                 return filters;
  55         }
  56
  57         // handlers
  58         public interface Handler<T> {
  59                 void handle(final ConsulResponse<T> object);
  60         }
  61
  62         public boolean addHandler(Handler<T> handler) {
  63                 boolean added = handlers.add(handler);
  64                 return added;
  65         }
  66
  67         public void removeAllHandler() {
  68                 handlers.clear();
  69         }
  70
  71         // internal listener
  72         protected class InternalListener implements ConsulCache.Listener<T> {
  73                 @Override
  74                 public void notify(ConsulResponse<T> newValues) {
  75
  76                         long startTime = System.currentTimeMillis();
  77
  78                         // filter
  79                         for (Filter<T> f : filters) {
  80                                 // false,return
  81                                 if (!f.filter(newValues)) {
  82                                         return;
  83                                 }
  84                         }
  85
  86                         // handle
  87                         for (Handler<T> h : handlers) {
  88                                 h.handle(newValues);
  89                         }
  90
  91                         long endTime = System.currentTimeMillis();
  92
  93                         if(endTime-startTime > 10*1000)
  94                         {
  95                                 LOGGER.info("WatchTask THEAD WORK TIMEOUT");
  96                         }
  97                 }
  98
  99         }
 100
 101
 102 }