-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
FakeClockJobScheduler.java
255 lines (224 loc) · 6.35 KB
/
FakeClockJobScheduler.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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.test;
import java.util.Collection;
import java.util.Objects;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import org.neo4j.scheduler.Group;
import org.neo4j.scheduler.JobScheduler;
import org.neo4j.time.FakeClock;
/**
* N.B - Do not use this with time resolutions of less than 1 ms!
*/
public class FakeClockJobScheduler extends FakeClock implements JobScheduler
{
private final AtomicLong jobIdGen = new AtomicLong();
private final Collection<JobHandle> jobs = new CopyOnWriteArrayList<>();
public FakeClockJobScheduler()
{
super();
}
private JobHandle schedule( Runnable job, long firstDeadline )
{
JobHandle jobHandle = new JobHandle( job, firstDeadline, 0 );
jobs.add( jobHandle );
return jobHandle;
}
private JobHandle scheduleRecurring( Runnable job, long firstDeadline, long period )
{
JobHandle jobHandle = new JobHandle( job, firstDeadline, period );
jobs.add( jobHandle );
return jobHandle;
}
@Override
public FakeClock forward( long delta, TimeUnit unit )
{
super.forward( delta, unit );
processSchedule();
return this;
}
private void processSchedule()
{
boolean anyTriggered;
do
{
anyTriggered = false;
for ( JobHandle job : jobs )
{
if ( job.tryTrigger() )
{
anyTriggered = true;
}
}
}
while ( anyTriggered );
}
private long now()
{
return instant().toEpochMilli();
}
@Override
public void setTopLevelGroupName( String name )
{
}
@Override
public Executor executor( Group group )
{
return job -> schedule( job, now() );
}
@Override
public ExecutorService workStealingExecutor( Group group, int parallelism )
{
throw new UnsupportedOperationException();
}
@Override
public ExecutorService workStealingExecutorAsyncMode( Group group, int parallelism )
{
throw new UnsupportedOperationException();
}
@Override
public ThreadFactory threadFactory( Group group )
{
throw new UnsupportedOperationException();
}
@Override
public JobHandle schedule( Group group, Runnable job )
{
JobHandle handle = schedule( job, now() );
processSchedule();
return handle;
}
@Override
public JobHandle schedule( Group group, Runnable job, long initialDelay, TimeUnit timeUnit )
{
JobHandle handle = schedule( job, now() + timeUnit.toMillis( initialDelay ) );
if ( initialDelay <= 0 )
{
processSchedule();
}
return handle;
}
@Override
public JobHandle scheduleRecurring( Group group, Runnable job, long period, TimeUnit timeUnit )
{
JobHandle handle = scheduleRecurring( job, now(), timeUnit.toMillis( period ) );
processSchedule();
return handle;
}
@Override
public JobHandle scheduleRecurring( Group group, Runnable job, long initialDelay, long period, TimeUnit timeUnit )
{
JobHandle handle = scheduleRecurring( job, now() + timeUnit.toMillis( initialDelay ), timeUnit.toMillis( period ) );
if ( initialDelay <= 0 )
{
processSchedule();
}
return handle;
}
@Override
public void init()
{
throw new UnsupportedOperationException();
}
@Override
public void start()
{
throw new UnsupportedOperationException();
}
@Override
public void stop()
{
throw new UnsupportedOperationException();
}
@Override
public void shutdown()
{
throw new UnsupportedOperationException();
}
@Override
public void close()
{
shutdown();
}
class JobHandle implements org.neo4j.scheduler.JobHandle
{
private final long id = jobIdGen.incrementAndGet();
private final Runnable runnable;
private final long period;
private long deadline;
JobHandle( Runnable runnable, long firstDeadline, long period )
{
this.runnable = runnable;
this.deadline = firstDeadline;
this.period = period;
}
boolean tryTrigger()
{
if ( now() >= deadline )
{
runnable.run();
if ( period != 0 )
{
deadline += period;
}
else
{
jobs.remove( this );
}
return true;
}
return false;
}
@Override
public void cancel( boolean mayInterruptIfRunning )
{
jobs.remove( this );
}
@Override
public void waitTermination()
{
throw new UnsupportedOperationException();
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{
return true;
}
if ( o == null || getClass() != o.getClass() )
{
return false;
}
JobHandle jobHandle = (JobHandle) o;
return id == jobHandle.id;
}
@Override
public int hashCode()
{
return Objects.hash( id );
}
}
}