wamblee.org Git - utils/blob

   1 /*
   2  * Copyright 2007 the original author or authors.
   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.wamblee.system.core;
  17
  18 import javax.sql.DataSource;
  19
  20 import org.wamblee.system.core.AbstractComponent;
  21 import org.wamblee.system.core.DefaultProvidedInterface;
  22 import org.wamblee.system.core.ProvidedInterface;
  23 import org.wamblee.system.core.RequiredInterface;
  24 import org.wamblee.test.EventTracker;
  25
  26 public class Environment extends AbstractComponent<Object> {
  27
  28         private static final ProvidedInterface[] provided(String aPrefix) {
  29                 return new ProvidedInterface[] {
  30                                 new DefaultProvidedInterface(aPrefix + "datasource", String.class),
  31                                 new DefaultProvidedInterface(aPrefix + "integer", Integer.class) };
  32         }
  33
  34         private static int COUNT = 0;
  35
  36         private EventTracker<String> _tracker;
  37         private double _random;
  38         private int _integer;
  39
  40         public Environment() {
  41                 this("environment");
  42         }
  43
  44         public Environment(String aName) {
  45        this(aName, "");
  46     }
  47
  48         public Environment(String aName, String aPrefix) {
  49         super(aName, provided(aPrefix), new RequiredInterface[0]);
  50         _random = Math.random();
  51         _integer = COUNT++;
  52     }
  53
  54
  55
  56         public Environment(EventTracker aTracker) {
  57                 this();
  58                 _tracker = aTracker;
  59         }
  60
  61         public Integer getInteger() {
  62                 return _integer;
  63         }
  64
  65         public String getString() {
  66                 return getName() + ".hello";
  67         }
  68
  69         @Override
  70         protected Object doStart(Scope aScope) {
  71                 addInterface(getProvidedInterfaces().get(0), getString(), aScope);
  72                 addInterface(getProvidedInterfaces().get(1), getInteger(), aScope);
  73                 track("start." + getName());
  74                 return _random;
  75         }
  76
  77         @Override
  78         protected void doStop(Object aRuntime) {
  79                 track("stop." + getName());
  80                 if (_random != (Double) aRuntime) {
  81                         throw new IllegalArgumentException("Wrong runtime: expected "
  82                                         + _random + " but got " + aRuntime);
  83                 }
  84         }
  85
  86         private void track(String aString) {
  87                 if (_tracker == null) {
  88                         return;
  89                 }
  90                 _tracker.eventOccurred(aString);
  91         }
  92 }