/
TaskExecutorFactoryBean.java
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/
TaskExecutorFactoryBean.java
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/*
* 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.
* You may obtain a copy of the License at
*
* https://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 org.springframework.scheduling.config;
import java.util.concurrent.RejectedExecutionHandler;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.task.TaskExecutor;
import org.springframework.lang.Nullable;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.util.StringUtils;
/**
* {@link FactoryBean} for creating {@link ThreadPoolTaskExecutor} instances,
* primarily used behind the XML task namespace.
*
* @author Mark Fisher
* @author Juergen Hoeller
* @since 3.0
*/
public class TaskExecutorFactoryBean implements
FactoryBean<TaskExecutor>, BeanNameAware, InitializingBean, DisposableBean {
@Nullable
private String poolSize;
@Nullable
private Integer queueCapacity;
@Nullable
private RejectedExecutionHandler rejectedExecutionHandler;
@Nullable
private Integer keepAliveSeconds;
@Nullable
private String beanName;
@Nullable
private ThreadPoolTaskExecutor target;
public void setPoolSize(String poolSize) {
this.poolSize = poolSize;
}
public void setQueueCapacity(int queueCapacity) {
this.queueCapacity = queueCapacity;
}
public void setRejectedExecutionHandler(RejectedExecutionHandler rejectedExecutionHandler) {
this.rejectedExecutionHandler = rejectedExecutionHandler;
}
public void setKeepAliveSeconds(int keepAliveSeconds) {
this.keepAliveSeconds = keepAliveSeconds;
}
@Override
public void setBeanName(String beanName) {
this.beanName = beanName;
}
@Override
public void afterPropertiesSet() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
determinePoolSizeRange(executor);
if (this.queueCapacity != null) {
executor.setQueueCapacity(this.queueCapacity);
}
if (this.keepAliveSeconds != null) {
executor.setKeepAliveSeconds(this.keepAliveSeconds);
}
if (this.rejectedExecutionHandler != null) {
executor.setRejectedExecutionHandler(this.rejectedExecutionHandler);
}
if (this.beanName != null) {
executor.setThreadNamePrefix(this.beanName + "-");
}
executor.afterPropertiesSet();
this.target = executor;
}
private void determinePoolSizeRange(ThreadPoolTaskExecutor executor) {
if (StringUtils.hasText(this.poolSize)) {
try {
int corePoolSize;
int maxPoolSize;
int separatorIndex = this.poolSize.indexOf('-');
if (separatorIndex != -1) {
corePoolSize = Integer.parseInt(this.poolSize.substring(0, separatorIndex));
maxPoolSize = Integer.parseInt(this.poolSize.substring(separatorIndex + 1));
if (corePoolSize > maxPoolSize) {
throw new IllegalArgumentException(
"Lower bound of pool-size range must not exceed the upper bound");
}
if (this.queueCapacity == null) {
// No queue-capacity provided, so unbounded
if (corePoolSize == 0) {
// Actually set 'corePoolSize' to the upper bound of the range
// but allow core threads to timeout...
executor.setAllowCoreThreadTimeOut(true);
corePoolSize = maxPoolSize;
}
else {
// Non-zero lower bound implies a core-max size range...
throw new IllegalArgumentException(
"A non-zero lower bound for the size range requires a queue-capacity value");
}
}
}
else {
Integer value = Integer.valueOf(this.poolSize);
corePoolSize = value;
maxPoolSize = value;
}
executor.setCorePoolSize(corePoolSize);
executor.setMaxPoolSize(maxPoolSize);
}
catch (NumberFormatException ex) {
throw new IllegalArgumentException("Invalid pool-size value [" + this.poolSize + "]: only single " +
"maximum integer (e.g. \"5\") and minimum-maximum range (e.g. \"3-5\") are supported", ex);
}
}
}
@Override
@Nullable
public TaskExecutor getObject() {
return this.target;
}
@Override
public Class<? extends TaskExecutor> getObjectType() {
return (this.target != null ? this.target.getClass() : ThreadPoolTaskExecutor.class);
}
@Override
public boolean isSingleton() {
return true;
}
@Override
public void destroy() {
if (this.target != null) {
this.target.destroy();
}
}
}