/*
* Copyright 2013 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
*
* http://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.jsr;
import java.util.Properties;
import javax.batch.runtime.context.StepContext;
import org.springframework.batch.core.jsr.configuration.support.BatchPropertyContext;
import org.springframework.batch.core.scope.context.StepSynchronizationManager;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.FactoryBeanNotInitializedException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.Assert;
/**
* {@link FactoryBean} implementation used to create {@link javax.batch.runtime.context.StepContext}
* instances within the step scope.
*
* @author Michael Minella
* @author Chris Schaefer
* @since 3.0
*/
public class JsrStepContextFactoryBean implements FactoryBean<StepContext>, InitializingBean {
@Autowired
private BatchPropertyContext batchPropertyContext;
private static final ThreadLocal<javax.batch.runtime.context.StepContext> contextHolder = new ThreadLocal<javax.batch.runtime.context.StepContext>();
protected void setBatchPropertyContext(BatchPropertyContext batchPropertyContext) {
this.batchPropertyContext = batchPropertyContext;
}
/* (non-Javadoc)
* @see org.springframework.beans.factory.FactoryBean#getObject()
*/
@Override
public StepContext getObject() throws Exception {
return getCurrent();
}
private javax.batch.runtime.context.StepContext getCurrent() {
org.springframework.batch.core.StepExecution curStepExecution = null;
if(StepSynchronizationManager.getContext() != null) {
curStepExecution = StepSynchronizationManager.getContext().getStepExecution();
}
if(curStepExecution == null) {
throw new FactoryBeanNotInitializedException("A StepExecution is required");
}
StepContext context = contextHolder.get();
// If the current context applies to the current step, use it
if(context != null && context.getStepExecutionId() == curStepExecution.getId()) {
return context;
}
Properties stepProperties = batchPropertyContext.getStepProperties(curStepExecution.getStepName());
if(stepProperties != null) {
context = new JsrStepContext(curStepExecution, stepProperties);
} else {
context = new JsrStepContext(curStepExecution, new Properties());
}
contextHolder.set(context);
return context;
}
/* (non-Javadoc)
* @see org.springframework.beans.factory.FactoryBean#getObjectType()
*/
@Override
public Class<?> getObjectType() {
return StepContext.class;
}
/* (non-Javadoc)
* @see org.springframework.beans.factory.FactoryBean#isSingleton()
*/
@Override
public boolean isSingleton() {
return false;
}
@Override
public void afterPropertiesSet() throws Exception {
Assert.notNull(batchPropertyContext, "BatchPropertyContext is required");
}
public void remove() {
if(contextHolder.get() != null) {
contextHolder.remove();
}
}
}