This repository has been archived by the owner on Sep 26, 2023. It is now read-only.
/
ChannelPoolTest.java
232 lines (202 loc) · 9.38 KB
/
ChannelPoolTest.java
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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
/*
* Copyright 2017 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.google.api.gax.grpc;
import com.google.api.gax.grpc.testing.FakeChannelFactory;
import com.google.api.gax.grpc.testing.FakeServiceGrpc;
import com.google.common.collect.Lists;
import com.google.common.truth.Truth;
import com.google.type.Color;
import com.google.type.Money;
import io.grpc.CallOptions;
import io.grpc.ClientCall;
import io.grpc.ManagedChannel;
import io.grpc.MethodDescriptor;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mockito;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
@RunWith(JUnit4.class)
public class ChannelPoolTest {
@Test
public void testAuthority() throws IOException {
ManagedChannel sub1 = Mockito.mock(ManagedChannel.class);
ManagedChannel sub2 = Mockito.mock(ManagedChannel.class);
Mockito.when(sub1.authority()).thenReturn("myAuth");
ChannelPool pool = ChannelPool.create(2, new FakeChannelFactory(Arrays.asList(sub1, sub2)));
Truth.assertThat(pool.authority()).isEqualTo("myAuth");
}
@Test
public void testRoundRobin() throws IOException {
ManagedChannel sub1 = Mockito.mock(ManagedChannel.class);
ManagedChannel sub2 = Mockito.mock(ManagedChannel.class);
Mockito.when(sub1.authority()).thenReturn("myAuth");
ArrayList<ManagedChannel> channels = Lists.newArrayList(sub1, sub2);
ChannelPool pool = ChannelPool.create(2, new FakeChannelFactory(Arrays.asList(sub1, sub2)));
verifyTargetChannel(pool, channels, sub1);
verifyTargetChannel(pool, channels, sub2);
verifyTargetChannel(pool, channels, sub1);
}
private void verifyTargetChannel(
ChannelPool pool, List<ManagedChannel> channels, ManagedChannel targetChannel) {
MethodDescriptor<Color, Money> methodDescriptor = FakeServiceGrpc.METHOD_RECOGNIZE;
CallOptions callOptions = CallOptions.DEFAULT;
@SuppressWarnings("unchecked")
ClientCall<Color, Money> expectedClientCall = Mockito.mock(ClientCall.class);
for (ManagedChannel channel : channels) {
Mockito.reset(channel);
}
Mockito.doReturn(expectedClientCall).when(targetChannel).newCall(methodDescriptor, callOptions);
ClientCall<Color, Money> actualCall = pool.newCall(methodDescriptor, callOptions);
Truth.assertThat(actualCall).isSameInstanceAs(expectedClientCall);
Mockito.verify(targetChannel, Mockito.times(1)).newCall(methodDescriptor, callOptions);
for (ManagedChannel otherChannel : channels) {
if (otherChannel != targetChannel) {
Mockito.verify(otherChannel, Mockito.never()).newCall(methodDescriptor, callOptions);
}
}
}
@Test
public void ensureEvenDistribution() throws InterruptedException, IOException {
int numChannels = 10;
final ManagedChannel[] channels = new ManagedChannel[numChannels];
final AtomicInteger[] counts = new AtomicInteger[numChannels];
final MethodDescriptor<Color, Money> methodDescriptor = FakeServiceGrpc.METHOD_RECOGNIZE;
final CallOptions callOptions = CallOptions.DEFAULT;
@SuppressWarnings("unchecked")
final ClientCall<Color, Money> clientCall = Mockito.mock(ClientCall.class);
for (int i = 0; i < numChannels; i++) {
final int index = i;
counts[i] = new AtomicInteger();
channels[i] = Mockito.mock(ManagedChannel.class);
Mockito.when(channels[i].newCall(methodDescriptor, callOptions))
.thenAnswer(
new Answer<ClientCall<Color, Money>>() {
@Override
public ClientCall<Color, Money> answer(InvocationOnMock invocationOnMock)
throws Throwable {
counts[index].incrementAndGet();
return clientCall;
}
});
}
final ChannelPool pool =
ChannelPool.create(numChannels, new FakeChannelFactory(Arrays.asList(channels)));
int numThreads = 20;
final int numPerThread = 1000;
ExecutorService executor = Executors.newFixedThreadPool(numThreads);
for (int i = 0; i < numThreads; i++) {
executor.submit(
new Runnable() {
@Override
public void run() {
for (int j = 0; j < numPerThread; j++) {
pool.newCall(methodDescriptor, callOptions);
}
}
});
}
executor.shutdown();
boolean shutdown = executor.awaitTermination(1, TimeUnit.MINUTES);
Truth.assertThat(shutdown).isTrue();
int expectedCount = (numThreads * numPerThread) / numChannels;
for (AtomicInteger count : counts) {
Truth.assertThat(count.get()).isAnyOf(expectedCount, expectedCount + 1);
}
}
// Test channelPrimer is called same number of times as poolSize if executorService is set to null
@Test
public void channelPrimerShouldBeCalledOnce() throws IOException {
ChannelPrimer mockChannelPrimer = Mockito.mock(ChannelPrimer.class);
ManagedChannel channel1 = Mockito.mock(ManagedChannel.class);
ManagedChannel channel2 = Mockito.mock(ManagedChannel.class);
ChannelPool.create(
2, new FakeChannelFactory(Arrays.asList(channel1, channel2), mockChannelPrimer));
Mockito.verify(mockChannelPrimer, Mockito.times(2))
.primeChannel(Mockito.any(ManagedChannel.class));
}
// Test channelPrimer is called periodically, if there's an executorService
@Test
public void channelPrimerIsCalledPeriodically() throws IOException, InterruptedException {
ChannelPrimer mockChannelPrimer = Mockito.mock(ChannelPrimer.class);
ManagedChannel channel1 = Mockito.mock(RefreshingManagedChannel.class);
ManagedChannel channel2 = Mockito.mock(RefreshingManagedChannel.class);
ManagedChannel channel3 = Mockito.mock(RefreshingManagedChannel.class);
final List<Runnable> channelRefreshers = new ArrayList<>();
ScheduledExecutorService scheduledExecutorService =
Mockito.mock(ScheduledExecutorService.class);
Mockito.when(
scheduledExecutorService.schedule(
Mockito.any(Runnable.class), Mockito.anyLong(), Mockito.eq(TimeUnit.MILLISECONDS)))
.thenAnswer(
new Answer() {
public Object answer(InvocationOnMock invocation) {
channelRefreshers.add((Runnable) invocation.getArgument(0));
return Mockito.mock(ScheduledFuture.class);
}
});
ChannelPool.createRefreshing(
1,
new FakeChannelFactory(Arrays.asList(channel1, channel2, channel3), mockChannelPrimer),
scheduledExecutorService);
// 1 call during the creation
Mockito.verify(mockChannelPrimer, Mockito.times(1))
.primeChannel(Mockito.any(ManagedChannel.class));
Mockito.verify(scheduledExecutorService, Mockito.times(1))
.schedule(
Mockito.any(Runnable.class), Mockito.anyLong(), Mockito.eq(TimeUnit.MILLISECONDS));
channelRefreshers.get(0).run();
// 1 more call during channel refresh
Mockito.verify(mockChannelPrimer, Mockito.times(2))
.primeChannel(Mockito.any(ManagedChannel.class));
Mockito.verify(scheduledExecutorService, Mockito.times(2))
.schedule(
Mockito.any(Runnable.class), Mockito.anyLong(), Mockito.eq(TimeUnit.MILLISECONDS));
channelRefreshers.get(0).run();
// 1 more call during channel refresh
Mockito.verify(mockChannelPrimer, Mockito.times(3))
.primeChannel(Mockito.any(ManagedChannel.class));
Mockito.verify(scheduledExecutorService, Mockito.times(3))
.schedule(
Mockito.any(Runnable.class), Mockito.anyLong(), Mockito.eq(TimeUnit.MILLISECONDS));
scheduledExecutorService.shutdown();
}
}