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This replaces the very custom polling timer service with a simple abstraction working on top of the job scheduler.
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community/kernel/src/test/java/org/neo4j/test/FakeClockJobScheduler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,240 @@ | ||
| /* | ||
| * Copyright (c) 2002-2017 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.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.Map; | ||
| import java.util.Objects; | ||
| import java.util.concurrent.CopyOnWriteArrayList; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.Executor; | ||
| import java.util.concurrent.ThreadFactory; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
|
|
||
| import org.neo4j.kernel.impl.util.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(); | ||
| } | ||
|
|
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| 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 Executor executor( Group group ) | ||
| { | ||
| return job -> schedule( job, now() ); | ||
| } | ||
|
|
||
| @Override | ||
| public ThreadFactory threadFactory( Group group ) | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
|
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| @Override | ||
| public JobHandle schedule( Group group, Runnable job ) | ||
| { | ||
| JobHandle handle = schedule( job, now() ); | ||
| processSchedule(); | ||
| return handle; | ||
| } | ||
|
|
||
| @Override | ||
| public JobHandle schedule( Group group, Runnable job, Map<String,String> metadata ) | ||
| { | ||
| 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; | ||
| } | ||
|
|
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| @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() throws Throwable | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
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| @Override | ||
| public void start() throws Throwable | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
|
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| @Override | ||
| public void stop() throws Throwable | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
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| @Override | ||
| public void shutdown() throws Throwable | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
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| class JobHandle implements JobScheduler.JobHandle | ||
| { | ||
| private final long id = jobIdGen.incrementAndGet(); | ||
| private final Runnable runnable; | ||
| private final long period; | ||
|
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| private long deadline; | ||
|
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| JobHandle( Runnable runnable, long firstDeadline, long period ) | ||
| { | ||
| this.runnable = runnable; | ||
| this.deadline = firstDeadline; | ||
| this.period = period; | ||
| } | ||
|
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| 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 ); | ||
| } | ||
|
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| @Override | ||
| public void waitTermination() throws InterruptedException, ExecutionException | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
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||
| @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 ); | ||
| } | ||
| } | ||
| } |
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