1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.zookeeper.server.quorum;
import org.apache.jute.BinaryOutputArchive;
import org.apache.zookeeper.metrics.MetricsUtils;
import org.apache.zookeeper.server.ServerMetrics;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import static org.hamcrest.number.OrderingComparison.greaterThan;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
public class LearnerHandlerMetricsTest {
private MockLearnerHandler learnerHandler;
private long sid = 5;
private volatile CountDownLatch allSentLatch = null;
class MockLearnerHandler extends LearnerHandler {
MockLearnerHandler(Socket socket, Leader leader) throws IOException {
super(socket, null, leader);
}
}
@Before
public void setup() throws IOException {
Leader leader = mock(Leader.class);
when(leader.getQuorumAuthServer()).thenReturn(null);
Socket socket = mock(Socket.class);
when(socket.getRemoteSocketAddress()).thenReturn(new InetSocketAddress(32));
//adding 5ms artificial delay when sending each packet
BinaryOutputArchive oa = mock(BinaryOutputArchive.class);
doAnswer(invocationOnMock -> {Thread.sleep(5); return null;})
.when(oa).writeRecord(any(QuorumPacket.class), anyString());
BufferedOutputStream bos = mock(BufferedOutputStream.class);
// flush is called when all packets are sent and the queue is empty
doAnswer(invocationOnMock -> {
if (allSentLatch != null) {
allSentLatch.countDown();
}
return null;
}).when(bos).flush();
learnerHandler = new MockLearnerHandler(socket, leader);
learnerHandler.setOutputArchive(oa);
learnerHandler.setBufferedOutput(bos);
learnerHandler.sid = sid;
}
@Test
public void testMetrics() throws InterruptedException {
ServerMetrics.getMetrics().resetAll();
//adding 1001 packets in the queue, two marker packets will be added since the interval is every 1000 packets
for (int i=0; i<1001; i++) {
learnerHandler.queuePacket(new QuorumPacket());
}
allSentLatch = new CountDownLatch(1);
learnerHandler.startSendingPackets();
allSentLatch.await(8, TimeUnit.SECONDS);
Map<String, Object> values = MetricsUtils.currentServerMetrics();
String sidStr = Long.toString(sid);
//we record time for each marker packet and we have two marker packets
Assert.assertEquals(2L, values.get("cnt_" + sidStr + "_learner_handler_qp_time_ms"));
//the second marker has 1000 packets in front of it and each takes 5 ms to send so the time in queue should be
//longer than 5*1000
Assert.assertThat((long)values.get("max_" + sidStr + "_learner_handler_qp_time_ms"), greaterThan(5000L));
//we send 1001 packets + 2 marker packets so the queue size is recorded 1003 times
Assert.assertEquals(1003L, values.get("cnt_" + sidStr + "_learner_handler_qp_size"));
//the longest queue size is recorded when we are sending the first packet
Assert.assertEquals(1002L, values.get("max_" + sidStr + "_learner_handler_qp_size"));
//this is when the queue is emptied
Assert.assertEquals(0L, values.get("min_" + sidStr + "_learner_handler_qp_size"));
}
}
|
