/* 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.activiti.cdi.impl.context;
import java.lang.annotation.Annotation;
import javax.enterprise.context.spi.Context;
import javax.enterprise.context.spi.Contextual;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import org.activiti.cdi.BusinessProcess;
import org.activiti.cdi.annotation.BusinessProcessScoped;
import org.activiti.cdi.impl.util.ProgrammaticBeanLookup;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implementation of the BusinessProcessContext-scope.
*
* @author Daniel Meyer
*/
@SuppressWarnings("unchecked")
public class BusinessProcessContext implements Context {
final static Logger logger = LoggerFactory.getLogger(BusinessProcessContext.class);
private final BeanManager beanManager;
public BusinessProcessContext(BeanManager beanManager) {
this.beanManager = beanManager;
}
protected BusinessProcess getBusinessProcess() {
return ProgrammaticBeanLookup.lookup(BusinessProcess.class, beanManager);
}
@Override
public Class< ? extends Annotation> getScope() {
return BusinessProcessScoped.class;
}
@Override
public <T> T get(Contextual<T> contextual) {
Bean<T> bean = (Bean<T>) contextual;
String variableName = bean.getName();
BusinessProcess businessProcess = getBusinessProcess();
Object variable = businessProcess.getVariable(variableName);
if (variable != null) {
if(logger.isDebugEnabled()) {
if(businessProcess.isAssociated()) {
logger.debug("Getting instance of bean '{}' from Execution[{}]", variableName, businessProcess.getExecutionId());
} else {
logger.debug("Getting instance of bean '{}' from transient bean store", variableName);
}
}
return (T) variable;
} else {
return null;
}
}
@Override
public <T> T get(Contextual<T> contextual, CreationalContext<T> arg1) {
Bean<T> bean = (Bean<T>) contextual;
String variableName = bean.getName();
BusinessProcess businessProcess = getBusinessProcess();
Object variable = businessProcess.getVariable(variableName);
if (variable != null) {
if(logger.isDebugEnabled()) {
if(businessProcess.isAssociated()) {
logger.debug("Getting instance of bean '{}' from Execution[{}]", variableName, businessProcess.getExecutionId());
} else {
logger.debug("Getting instance of bean '{}' from transient bean store", variableName);
}
}
return (T) variable;
} else {
if(logger.isDebugEnabled()) {
if(businessProcess.isAssociated()) {
logger.debug("Creating instance of bean '{}' in business process context representing Execution[{}]", variableName, businessProcess.getExecutionId());
} else {
logger.debug("Creating instance of bean '{}' in transient bean store", variableName);
}
}
T beanInstance = bean.create(arg1);
businessProcess.setVariable(variableName, beanInstance);
return beanInstance;
}
}
@Override
public boolean isActive() {
// we assume the business process is always 'active'. If no task/execution is
// associated, temporary instances of @BusinessProcesScoped beans are cached in the
// conversation / request
return true;
}
}