spring ExecutorBeanDefinitionParser 源码
spring ExecutorBeanDefinitionParser 代码
文件路径：/spring-context/src/main/java/org/springframework/scheduling/config/ExecutorBeanDefinitionParser.java
/*
* Copyright 2002-2016 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 org.w3c.dom.Element;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.StringUtils;
/**
* Parser for the 'executor' element of the 'task' namespace.
*
* @author Mark Fisher
* @author Juergen Hoeller
* @since 3.0
*/
public class ExecutorBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {
@Override
protected String getBeanClassName(Element element) {
return "org.springframework.scheduling.config.TaskExecutorFactoryBean";
}
@Override
protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
String keepAliveSeconds = element.getAttribute("keep-alive");
if (StringUtils.hasText(keepAliveSeconds)) {
builder.addPropertyValue("keepAliveSeconds", keepAliveSeconds);
}
String queueCapacity = element.getAttribute("queue-capacity");
if (StringUtils.hasText(queueCapacity)) {
builder.addPropertyValue("queueCapacity", queueCapacity);
}
configureRejectionPolicy(element, builder);
String poolSize = element.getAttribute("pool-size");
if (StringUtils.hasText(poolSize)) {
builder.addPropertyValue("poolSize", poolSize);
}
}
private void configureRejectionPolicy(Element element, BeanDefinitionBuilder builder) {
String rejectionPolicy = element.getAttribute("rejection-policy");
if (!StringUtils.hasText(rejectionPolicy)) {
return;
}
String prefix = "java.util.concurrent.ThreadPoolExecutor.";
String policyClassName;
if (rejectionPolicy.equals("ABORT")) {
policyClassName = prefix + "AbortPolicy";
}
else if (rejectionPolicy.equals("CALLER_RUNS")) {
policyClassName = prefix + "CallerRunsPolicy";
}
else if (rejectionPolicy.equals("DISCARD")) {
policyClassName = prefix + "DiscardPolicy";
}
else if (rejectionPolicy.equals("DISCARD_OLDEST")) {
policyClassName = prefix + "DiscardOldestPolicy";
}
else {
policyClassName = rejectionPolicy;
}
builder.addPropertyValue("rejectedExecutionHandler", new RootBeanDefinition(policyClassName));
}
}
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