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1
51
52 package org.objectweb.jass.as;
53
54 import java.net.InetAddress  ;
55 import java.net.UnknownHostException ;
56
57 import org.apache.log4j.Logger;
58
59
65 public class ActivityIdGenerator implements java.io.Serializable {
66
67 private static Logger log = Logger.getLogger(ActivityIdGenerator.class);
68 private static ActivityIdGenerator singleton = null;
69
70
72 private String baseGlobalId;
73 private long globalIdNumber = 0;
74 private ActivityIdImpl lastId = null;
75
76
78
81 private ActivityIdGenerator() {
82
83 try {
84 baseGlobalId = InetAddress.getLocalHost().getHostName() + "/";
85 } catch (UnknownHostException e) {
86 baseGlobalId = "localhost/";
87 }
88 }
89
90
92
96 public static ActivityIdGenerator getSingleton() {
97
98 if (singleton == null)
99 singleton = new ActivityIdGenerator();
100
101 return singleton;
102 }
103
104
108 public ActivityIdImpl newActivityId() {
109
110 String id = baseGlobalId + Long.toString(getNextId());
111 byte[] globalId = id.getBytes();
112 ActivityIdImpl aid = new ActivityIdImpl(globalId);
113 log.debug("New Activity Id Created: " + aid.print());
114 lastId = aid;
115
116 return aid;
117 }
118
119
123 public ActivityIdImpl getLastId() {
124 return lastId;
125 }
126
127
129
131
135 private synchronized long getNextId() {
136
137 return globalIdNumber++;
138 }
139
140 }
141 |
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