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Code Issues Actions 2 Packages Projects Releases Wiki Activity

SimpleAsyncTaskExecutor properly respects NO_CONCURRENCY 

Issue: SPR-15895
This commit is contained in:
Juergen Hoeller 2017-09-01 13:44:49 +02:00
parent 678a786076
commit 204ddebd68
3 changed files with 9 additions and 9 deletions
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5
spring-core/src/main/java/org/springframework/core/task/SimpleAsyncTaskExecutor.java
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@ -48,15 +48,18 @@ import org.springframework.util.concurrent.ListenableFutureTask;
* @see org.springframework.scheduling.commonj.WorkManagerTaskExecutor
*/
@SuppressWarnings("serial")
public class SimpleAsyncTaskExecutor extends CustomizableThreadCreator implements AsyncListenableTaskExecutor, Serializable {
public class SimpleAsyncTaskExecutor extends CustomizableThreadCreator
implements AsyncListenableTaskExecutor, Serializable {
/**
* Permit any number of concurrent invocations: that is, don't throttle concurrency.
* @see ConcurrencyThrottleSupport#UNBOUNDED_CONCURRENCY
*/
public static final int UNBOUNDED_CONCURRENCY = ConcurrencyThrottleSupport.UNBOUNDED_CONCURRENCY;
/**
* Switch concurrency 'off': that is, don't allow any concurrent invocations.
* @see ConcurrencyThrottleSupport#NO_CONCURRENCY
*/
public static final int NO_CONCURRENCY = ConcurrencyThrottleSupport.NO_CONCURRENCY;

4
spring-core/src/main/java/org/springframework/util/ConcurrencyThrottleSupport.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -93,7 +93,7 @@ public abstract class ConcurrencyThrottleSupport implements Serializable {
* @see #getConcurrencyLimit()
*/
public boolean isThrottleActive() {
return (this.concurrencyLimit > 0);
return (this.concurrencyLimit >= 0);
}

9
spring-core/src/test/java/org/springframework/core/task/SimpleAsyncTaskExecutorTests.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2015 the original author or authors.
* Copyright 2002-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -18,14 +18,13 @@ package org.springframework.core.task;
import java.util.concurrent.ThreadFactory;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.springframework.util.ConcurrencyThrottleSupport;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
/**
@ -39,13 +38,11 @@ public class SimpleAsyncTaskExecutorTests {
public final ExpectedException exception = ExpectedException.none();
// TODO Determine why task is executed when concurrency is switched off.
@Ignore("Disabled because task is still executed when concurrency is switched off")
@Test
public void cannotExecuteWhenConcurrencyIsSwitchedOff() throws Exception {
SimpleAsyncTaskExecutor executor = new SimpleAsyncTaskExecutor();
executor.setConcurrencyLimit(ConcurrencyThrottleSupport.NO_CONCURRENCY);
assertFalse(executor.isThrottleActive());
assertTrue(executor.isThrottleActive());
exception.expect(IllegalStateException.class);
executor.execute(new NoOpRunnable());
}