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
|
/*
* Copyright (C) 2009 The Guava Authors
*
* Licensed 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 com.google.common.util.concurrent;
import static com.google.common.truth.Truth.assertThat;
import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static org.junit.Assert.assertThrows;
import com.google.common.collect.Lists;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import junit.framework.TestCase;
/**
* Tests for {@link AbstractIdleService}.
*
* @author Chris Nokleberg
* @author Ben Yu
*/
public class AbstractIdleServiceTest extends TestCase {
public void testStart() {
TestService service = new TestService();
assertEquals(0, service.startUpCalled);
service.startAsync().awaitRunning();
assertEquals(1, service.startUpCalled);
assertEquals(Service.State.RUNNING, service.state());
assertThat(service.transitionStates).containsExactly(Service.State.STARTING);
}
public void testStart_failed() {
final Exception exception = new Exception("deliberate");
TestService service =
new TestService() {
@Override
protected void startUp() throws Exception {
super.startUp();
throw exception;
}
};
assertEquals(0, service.startUpCalled);
RuntimeException e =
assertThrows(RuntimeException.class, () -> service.startAsync().awaitRunning());
assertThat(e).hasCauseThat().isSameInstanceAs(exception);
assertEquals(1, service.startUpCalled);
assertEquals(Service.State.FAILED, service.state());
assertThat(service.transitionStates).containsExactly(Service.State.STARTING);
}
public void testStop_withoutStart() {
TestService service = new TestService();
service.stopAsync().awaitTerminated();
assertEquals(0, service.startUpCalled);
assertEquals(0, service.shutDownCalled);
assertEquals(Service.State.TERMINATED, service.state());
assertThat(service.transitionStates).isEmpty();
}
public void testStop_afterStart() {
TestService service = new TestService();
service.startAsync().awaitRunning();
assertEquals(1, service.startUpCalled);
assertEquals(0, service.shutDownCalled);
service.stopAsync().awaitTerminated();
assertEquals(1, service.startUpCalled);
assertEquals(1, service.shutDownCalled);
assertEquals(Service.State.TERMINATED, service.state());
assertThat(service.transitionStates)
.containsExactly(Service.State.STARTING, Service.State.STOPPING)
.inOrder();
}
public void testStop_failed() {
final Exception exception = new Exception("deliberate");
TestService service =
new TestService() {
@Override
protected void shutDown() throws Exception {
super.shutDown();
throw exception;
}
};
service.startAsync().awaitRunning();
assertEquals(1, service.startUpCalled);
assertEquals(0, service.shutDownCalled);
RuntimeException e =
assertThrows(RuntimeException.class, () -> service.stopAsync().awaitTerminated());
assertThat(e).hasCauseThat().isSameInstanceAs(exception);
assertEquals(1, service.startUpCalled);
assertEquals(1, service.shutDownCalled);
assertEquals(Service.State.FAILED, service.state());
assertThat(service.transitionStates)
.containsExactly(Service.State.STARTING, Service.State.STOPPING)
.inOrder();
}
public void testServiceToString() {
AbstractIdleService service = new TestService();
assertEquals("TestService [NEW]", service.toString());
service.startAsync().awaitRunning();
assertEquals("TestService [RUNNING]", service.toString());
service.stopAsync().awaitTerminated();
assertEquals("TestService [TERMINATED]", service.toString());
}
public void testTimeout() throws Exception {
// Create a service whose executor will never run its commands
Service service =
new TestService() {
@Override
protected Executor executor() {
return new Executor() {
@Override
public void execute(Runnable command) {}
};
}
@Override
protected String serviceName() {
return "Foo";
}
};
TimeoutException e =
assertThrows(
TimeoutException.class,
() -> service.startAsync().awaitRunning(1, TimeUnit.MILLISECONDS));
assertThat(e)
.hasMessageThat()
.isEqualTo("Timed out waiting for Foo [STARTING] to reach the RUNNING state.");
}
private static class TestService extends AbstractIdleService {
int startUpCalled = 0;
int shutDownCalled = 0;
final List<State> transitionStates = Lists.newArrayList();
@Override
protected void startUp() throws Exception {
assertEquals(0, startUpCalled);
assertEquals(0, shutDownCalled);
startUpCalled++;
assertEquals(State.STARTING, state());
}
@Override
protected void shutDown() throws Exception {
assertEquals(1, startUpCalled);
assertEquals(0, shutDownCalled);
shutDownCalled++;
assertEquals(State.STOPPING, state());
}
@Override
protected Executor executor() {
transitionStates.add(state());
return directExecutor();
}
}
// Functional tests using real thread. We only verify publicly visible state.
// Interaction assertions are done by the single-threaded unit tests.
private static class DefaultService extends AbstractIdleService {
@Override
protected void startUp() throws Exception {}
@Override
protected void shutDown() throws Exception {}
}
public void testFunctionalServiceStartStop() {
AbstractIdleService service = new DefaultService();
service.startAsync().awaitRunning();
assertEquals(Service.State.RUNNING, service.state());
service.stopAsync().awaitTerminated();
assertEquals(Service.State.TERMINATED, service.state());
}
public void testFunctionalStart_failed() {
final Exception exception = new Exception("deliberate");
AbstractIdleService service =
new DefaultService() {
@Override
protected void startUp() throws Exception {
throw exception;
}
};
RuntimeException e =
assertThrows(RuntimeException.class, () -> service.startAsync().awaitRunning());
assertThat(e).hasCauseThat().isSameInstanceAs(exception);
assertEquals(Service.State.FAILED, service.state());
}
public void testFunctionalStop_failed() {
final Exception exception = new Exception("deliberate");
AbstractIdleService service =
new DefaultService() {
@Override
protected void shutDown() throws Exception {
throw exception;
}
};
service.startAsync().awaitRunning();
RuntimeException e =
assertThrows(RuntimeException.class, () -> service.stopAsync().awaitTerminated());
assertThat(e).hasCauseThat().isSameInstanceAs(exception);
assertEquals(Service.State.FAILED, service.state());
}
}
|
