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/*
* Copyright 2006-2008 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.batch.core.configuration.xml;
import java.util.Arrays;
import java.util.List;
import org.springframework.beans.BeanMetadataElement;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.parsing.CompositeComponentDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.ManagedList;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;
import org.w3c.dom.Element;
/**
* Parser for the <job/> element in the Batch namespace. Sets up and returns
* a bean definition for a {@link org.springframework.batch.core.Job}.
*
* @author Dave Syer
*
*/
public class JobParser extends AbstractSingleBeanDefinitionParser {
private static final String MERGE_ATTR = "merge";
private static final String REF_ATTR = "ref";
private static final String BEAN_ELE = "bean";
private static final String REF_ELE = "ref";
private static final JobExecutionListenerParser jobListenerParser = new JobExecutionListenerParser();
@Override
protected Class getBeanClass(Element element) {
return JobParserJobFactoryBean.class;
}
/**
* Create a bean definition for a
* {@link org.springframework.batch.core.job.flow.FlowJob}. Nested step
* elements are delegated to an {@link InlineStepParser}.
*
* @see AbstractSingleBeanDefinitionParser#doParse(Element, ParserContext,
* BeanDefinitionBuilder)
*/
@Override
protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
if (!CoreNamespaceUtils.namespaceMatchesVersion(element)) {
parserContext.getReaderContext().error(
"You are using a version of the spring-batch XSD that is not compatible with Spring Batch 3.0." +
" Please upgrade your schema declarations (or use the spring-batch.xsd alias if you are " +
"feeling lucky).", element);
return;
}
CoreNamespaceUtils.autoregisterBeansForNamespace(parserContext, parserContext.extractSource(element));
String jobName = element.getAttribute("id");
builder.addConstructorArgValue(jobName);
boolean isAbstract = CoreNamespaceUtils.isAbstract(element);
builder.setAbstract(isAbstract);
String parentRef = element.getAttribute("parent");
if (StringUtils.hasText(parentRef)) {
builder.setParentName(parentRef);
}
String repositoryAttribute = element.getAttribute("job-repository");
if (StringUtils.hasText(repositoryAttribute)) {
builder.addPropertyReference("jobRepository", repositoryAttribute);
}
Element validator = DomUtils.getChildElementByTagName(element, "validator");
if (validator != null) {
builder.addPropertyValue("jobParametersValidator", parseBeanElement(validator, parserContext));
}
String restartableAttribute = element.getAttribute("restartable");
if (StringUtils.hasText(restartableAttribute)) {
builder.addPropertyValue("restartable", restartableAttribute);
}
String incrementer = (element.getAttribute("incrementer"));
if (StringUtils.hasText(incrementer)) {
builder.addPropertyReference("jobParametersIncrementer", incrementer);
}
if (isAbstract) {
for (String tagName : Arrays.asList("step", "decision", "split")) {
if (!DomUtils.getChildElementsByTagName(element, tagName).isEmpty()) {
parserContext.getReaderContext().error(
"The <" + tagName + "/> element may not appear on a with abstract=\"true\" ["
+ jobName + "]", element);
}
}
}
else {
InlineFlowParser flowParser = new InlineFlowParser(jobName, jobName);
BeanDefinition flowDef = flowParser.parse(element, parserContext);
builder.addPropertyValue("flow", flowDef);
}
Element description = DomUtils.getChildElementByTagName(element, "description");
if (description != null) {
builder.getBeanDefinition().setDescription(description.getTextContent());
}
List listenersElements = DomUtils.getChildElementsByTagName(element, "listeners");
if (listenersElements.size() == 1) {
Element listenersElement = listenersElements.get(0);
CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(listenersElement.getTagName(),
parserContext.extractSource(element));
parserContext.pushContainingComponent(compositeDef);
ManagedList listeners = new ManagedList<>();
listeners.setMergeEnabled(listenersElement.hasAttribute(MERGE_ATTR)
&& Boolean.valueOf(listenersElement.getAttribute(MERGE_ATTR)));
List listenerElements = DomUtils.getChildElementsByTagName(listenersElement, "listener");
for (Element listenerElement : listenerElements) {
listeners.add(jobListenerParser.parse(listenerElement, parserContext));
}
builder.addPropertyValue("jobExecutionListeners", listeners);
parserContext.popAndRegisterContainingComponent();
}
else if (listenersElements.size() > 1) {
parserContext.getReaderContext().error(
"The '' element may not appear more than once in a single .", element);
}
}
public BeanMetadataElement parseBeanElement(Element element, ParserContext parserContext) {
String refAttribute = element.getAttribute(REF_ATTR);
Element beanElement = DomUtils.getChildElementByTagName(element, BEAN_ELE);
Element refElement = DomUtils.getChildElementByTagName(element, REF_ELE);
if (StringUtils.hasText(refAttribute)) {
return new RuntimeBeanReference(refAttribute);
}
else if (beanElement != null) {
BeanDefinitionHolder beanDefinitionHolder = parserContext.getDelegate().parseBeanDefinitionElement(
beanElement);
parserContext.getDelegate().decorateBeanDefinitionIfRequired(beanElement, beanDefinitionHolder);
return beanDefinitionHolder;
}
else if (refElement != null) {
return (BeanMetadataElement) parserContext.getDelegate().parsePropertySubElement(refElement, null);
}
parserContext.getReaderContext().error(
"One of ref attribute or a nested bean definition or ref element must be specified", element);
return null;
}
}