Source Code Cross Referenced for AckMcastSenderWindowTest.java in  » Net » JGroups-2.4.1-sp3 » org » jgroups » tests » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » JGroups 2.4.1 sp3 » org.jgroups.tests 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // $Id: AckMcastSenderWindowTest.java,v 1.3 2006/05/16 11:14:28 belaban Exp $
002:        package org.jgroups.tests;
003:
004:        import junit.framework.Test;
005:        import junit.framework.TestCase;
006:        import junit.framework.TestSuite;
007:        import org.jgroups.Address;
008:        import org.jgroups.Message;
009:        import org.jgroups.stack.AckMcastSenderWindow;
010:        import org.jgroups.stack.IpAddress;
011:
012:        import java.util.ArrayList;
013:        import java.util.Hashtable;
014:        import java.util.List;
015:        import java.util.Vector;
016:        import java.net.UnknownHostException;
017:
018:        /**
019:         * Test <code>AckMcastSenderWindow</code>
020:         * <p>
021:         * <code>testAck()</code>:<br>
022:         * 1. Create two messages {1,2} each with 3 distinct destinations.<br>
023:         * 2. Start a thread that acknowledges messages between sleeping 
024:         * intervals.<br>
025:         * 3. When the callback retransmission function is called, check that the 
026:         * request is for a destination that is still associated with the given 
027:         * message sequence number.<br>
028:         * <p>
029:         * Since <code>AckMcastSenderWindow</code> does not export its state, keep 
030:         * track of seqnos and address lists in a hashtable.
031:         */
032:        public class AckMcastSenderWindowTest extends TestCase {
033:            private class Cmd implements  AckMcastSenderWindow.RetransmitCommand {
034:                public void retransmit(long seqno, Message msg, Address addr) {
035:                    _retransmit(seqno, msg, addr);
036:                }
037:            }
038:
039:            private class Acker extends Thread {
040:                public void run() {
041:                    _ackerRun();
042:                }
043:            }
044:
045:            /** A list of destination addresses */
046:            private static Address[] _RECVS = { new IpAddress(5000),
047:                    new IpAddress(5001), new IpAddress(5002) };
048:
049:            /** The retransmit command */
050:            private AckMcastSenderWindow.RetransmitCommand _cmd;
051:            /** The mcast retransmit window */
052:            private AckMcastSenderWindow _win;
053:            /**
054:             * 2-level table
055:             * seqNo -> list of destinations
056:             */
057:            private Hashtable _tbl;
058:
059:            /**
060:             * Associate the given addess with this sequence number. This is to 
061:             * reflect the state of the <code>AckMcastSenderWindow</code> as its state 
062:             * is not exported
063:             * 
064:             * @param seqno the sequence number
065:             * @param addr the address to associate with the seqno
066:             */
067:            private void _put(long seqno, Address addr) {
068:                List list;
069:
070:                synchronized (_tbl) {
071:                    if ((list = (List) _tbl.get(new Long(seqno))) == null) {
072:                        list = new ArrayList();
073:                        _tbl.put(new Long(seqno), list);
074:                    }
075:                    if (!list.contains(addr))
076:                        list.add(addr);
077:                    else {
078:                        if (list.isEmpty())
079:                            _tbl.remove(new Long(seqno));
080:                    }
081:                } // synchronized(_tbl)
082:            }
083:
084:            /**
085:             * Remove the given address from the list of addresses for this seqno
086:             * 
087:             * @param seqno the sequence number associated with a list of addresses
088:             * @param addr the address to remove from the list of addresses mapped 
089:             * to this seqno
090:             */
091:            private void _remove(long seqno, Address addr) {
092:                List list;
093:
094:                synchronized (_tbl) {
095:                    if ((list = (List) _tbl.get(new Long(seqno))) == null)
096:                        return;
097:                    list.remove(addr);
098:                    if (list.isEmpty())
099:                        _tbl.remove(new Long(seqno));
100:                } // synchronized(_tbl)
101:            }
102:
103:            /**
104:             * @return true if <code>addr</code> is associated with <code>seqno</code>
105:             */
106:            private boolean _contains(long seqno, Address addr) {
107:                List list;
108:
109:                synchronized (_tbl) {
110:                    if ((list = (List) _tbl.get(new Long(seqno))) == null)
111:                        return (false);
112:                    return (list.contains(addr));
113:                } // synchronized(_tbl)
114:            }
115:
116:            /**
117:             * Thread acknowledging messages
118:             */
119:            private void _ackerRun() {
120:                // Ack {2, _RECVS[2]}
121:                _win.ack(2, _RECVS[2]);
122:                _remove(2, _RECVS[2]);
123:                try {
124:                    Thread.sleep(1000);
125:                } catch (InterruptedException ex) {
126:                    ex.printStackTrace();
127:                }
128:
129:                // Ack {1, _RECVS[1]}
130:                _win.ack(1, _RECVS[1]);
131:                _remove(1, _RECVS[1]);
132:                try {
133:                    Thread.sleep(500);
134:                } catch (InterruptedException ex) {
135:                    ex.printStackTrace();
136:                }
137:
138:                // Ack {1, _RECVS[0]}
139:                // Ack {2, _RECVS[0]}
140:                // Ack {2, _RECVS[1]}
141:                _win.ack(1, _RECVS[0]);
142:                _remove(1, _RECVS[0]);
143:                _win.ack(2, _RECVS[0]);
144:                _remove(2, _RECVS[0]);
145:                _win.ack(2, _RECVS[1]);
146:                _remove(2, _RECVS[1]);
147:                try {
148:                    Thread.sleep(500);
149:                } catch (InterruptedException ex) {
150:                    ex.printStackTrace();
151:                }
152:
153:                // Ack {1, _RECVS[2]}
154:                _win.ack(1, _RECVS[2]);
155:                _remove(1, _RECVS[2]);
156:            }
157:
158:            /**
159:             * Check if retransmission is expected
160:             */
161:            private void _retransmit(long seqno, Message msg, Address addr) {
162:                if (!_contains(seqno, addr))
163:                    fail("Acknowledging a non-existent msg, great!");
164:                else
165:                    System.out.println("retransmitting " + seqno);
166:            }
167:
168:            /**
169:             * Add 2 messages to 3 destinations
170:             * 
171:             * Start acknowledging messages while checking the validity of 
172:             * retransmissions
173:             */
174:            public void test1() {
175:                Vector dests = new Vector();
176:                Message msg = new Message();
177:                Acker acker = new Acker();
178:                long seqno;
179:
180:                for (int i = 0; i < _RECVS.length; ++i)
181:                    dests.add(_RECVS[i]);
182:
183:                // seqno/1
184:                seqno = 1;
185:                for (int i = 0; i < _RECVS.length; ++i)
186:                    _put(seqno, _RECVS[i]);
187:                _win.add(seqno, msg, dests);
188:
189:                // seqno/2
190:                seqno = 2;
191:                for (int i = 0; i < _RECVS.length; ++i)
192:                    _put(seqno, _RECVS[i]);
193:                _win.add(seqno, msg, dests);
194:
195:                // start
196:                acker.start();
197:                try {
198:                    acker.join();
199:                } catch (InterruptedException ex) {
200:                    ex.printStackTrace();
201:                }
202:
203:                _win.stop();
204:            } // testAck()
205:
206:            public void testRemove() throws UnknownHostException {
207:                AckMcastSenderWindow mywin = new AckMcastSenderWindow(
208:                        new MyCommand(), new long[] { 1000, 2000, 3000 });
209:                Address sender1 = new IpAddress("127.0.0.1", 10000);
210:                Address sender2 = new IpAddress("127.0.0.1", 10001);
211:                Address sender3 = new IpAddress("127.0.0.1", 10002);
212:                Vector senders = new Vector();
213:                Message msg = new Message();
214:                long seqno = 322649;
215:
216:                senders.addElement(sender1);
217:                senders.addElement(sender2);
218:                senders.addElement(sender3);
219:
220:                mywin.add(seqno, msg, (Vector) senders.clone()); // clone() for the fun of it...
221:
222:                mywin.ack(seqno, sender1);
223:                mywin.ack(seqno, sender2);
224:
225:                System.out.println("entry is " + mywin.printDetails(seqno));
226:                assertTrue(mywin.getNumberOfResponsesExpected(seqno) == 3);
227:                assertTrue(mywin.getNumberOfResponsesReceived(seqno) == 2);
228:                mywin.waitUntilAllAcksReceived(4000);
229:                mywin.suspect(sender3);
230:                assertTrue(mywin.size() == 0); // because suspect() removed that entry
231:            }
232:
233:            public AckMcastSenderWindowTest(String name) {
234:                super (name);
235:            }
236:
237:            public void setUp() {
238:                _cmd = new Cmd();
239:                _win = new AckMcastSenderWindow(_cmd);
240:                _tbl = new Hashtable();
241:            }
242:
243:            public void tearDown() {
244:                _win.stop();
245:            }
246:
247:            class MyCommand implements  AckMcastSenderWindow.RetransmitCommand {
248:
249:                public void retransmit(long seqno, Message msg, Address dest) {
250:                    System.out.println("-- retransmitting " + seqno);
251:                }
252:            }
253:
254:            public static Test suite() {
255:                TestSuite suite;
256:                suite = new TestSuite(AckMcastSenderWindowTest.class);
257:                return (suite);
258:            }
259:
260:            public static void main(String[] args) {
261:                String[] name = { AckMcastSenderWindowTest.class.getName() };
262:                junit.textui.TestRunner.main(name);
263:            }
264:        }
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