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org.flowable.engine.impl.bpmn.helper.ClassDelegate Maven / Gradle / Ivy
/* 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.flowable.engine.impl.bpmn.helper;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.flowable.bpmn.model.FlowElement;
import org.flowable.bpmn.model.MapExceptionEntry;
import org.flowable.bpmn.model.Task;
import org.flowable.common.engine.api.FlowableException;
import org.flowable.common.engine.api.FlowableIllegalArgumentException;
import org.flowable.common.engine.api.delegate.Expression;
import org.flowable.engine.DynamicBpmnConstants;
import org.flowable.engine.delegate.BpmnError;
import org.flowable.engine.delegate.CustomPropertiesResolver;
import org.flowable.engine.delegate.DelegateExecution;
import org.flowable.engine.delegate.ExecutionListener;
import org.flowable.engine.delegate.FutureJavaDelegate;
import org.flowable.engine.delegate.JavaDelegate;
import org.flowable.engine.delegate.TransactionDependentExecutionListener;
import org.flowable.engine.delegate.TransactionDependentTaskListener;
import org.flowable.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior;
import org.flowable.engine.impl.bpmn.behavior.ServiceTaskFutureJavaDelegateActivityBehavior;
import org.flowable.engine.impl.bpmn.behavior.ServiceTaskJavaDelegateActivityBehavior;
import org.flowable.engine.impl.bpmn.parser.FieldDeclaration;
import org.flowable.engine.impl.context.BpmnOverrideContext;
import org.flowable.engine.impl.delegate.ActivityBehavior;
import org.flowable.engine.impl.delegate.SubProcessActivityBehavior;
import org.flowable.engine.impl.delegate.TriggerableActivityBehavior;
import org.flowable.engine.impl.delegate.invocation.ExecutionListenerInvocation;
import org.flowable.engine.impl.delegate.invocation.TaskListenerInvocation;
import org.flowable.engine.impl.persistence.entity.ExecutionEntity;
import org.flowable.engine.impl.util.CommandContextUtil;
import org.flowable.task.service.delegate.DelegateTask;
import org.flowable.task.service.delegate.TaskListener;
import com.fasterxml.jackson.databind.node.ObjectNode;
/**
* Helper class for bpmn constructs that allow class delegation.
*
* This class will lazily instantiate the referenced classes when needed at runtime.
*
* @author Joram Barrez
* @author Falko Menge
* @author Saeid Mirzaei
* @author Yvo Swillens
*/
public class ClassDelegate extends AbstractClassDelegate implements TaskListener, ExecutionListener, TransactionDependentExecutionListener, TransactionDependentTaskListener, SubProcessActivityBehavior, CustomPropertiesResolver {
private static final long serialVersionUID = 1L;
protected ActivityBehavior activityBehaviorInstance;
protected Expression skipExpression;
protected List mapExceptions;
protected CustomPropertiesResolver customPropertiesResolverInstance;
protected boolean triggerable;
public ClassDelegate(String className, List fieldDeclarations, Expression skipExpression) {
super(className, fieldDeclarations);
this.skipExpression = skipExpression;
}
public ClassDelegate(String id, String className, List fieldDeclarations, boolean triggerable, Expression skipExpression,
List mapExceptions) {
this(className, fieldDeclarations, skipExpression);
this.triggerable = triggerable;
this.serviceTaskId = id;
this.mapExceptions = mapExceptions;
}
public ClassDelegate(Class clazz, List fieldDeclarations, Expression skipExpression) {
this(clazz.getName(), fieldDeclarations, skipExpression);
}
public ClassDelegate(String className, List fieldDeclarations) {
super(className, fieldDeclarations);
}
public ClassDelegate(Class clazz, List fieldDeclarations) {
super(clazz, fieldDeclarations);
}
// Execution listener
@Override
public void notify(DelegateExecution execution) {
ExecutionListener executionListenerInstance = getExecutionListenerInstance();
CommandContextUtil.getProcessEngineConfiguration().getDelegateInterceptor().handleInvocation(new ExecutionListenerInvocation(executionListenerInstance, execution));
}
// Transaction Dependent execution listener
@Override
public void notify(String processInstanceId, String executionId, FlowElement flowElement, Map executionVariables, Map customPropertiesMap) {
TransactionDependentExecutionListener transactionDependentExecutionListenerInstance = getTransactionDependentExecutionListenerInstance();
// Note that we can't wrap it in the delegate interceptor like usual here due to being executed when the context is already removed.
transactionDependentExecutionListenerInstance.notify(processInstanceId, executionId, flowElement, executionVariables, customPropertiesMap);
}
@Override
public Map getCustomPropertiesMap(DelegateExecution execution) {
if (customPropertiesResolverInstance == null) {
customPropertiesResolverInstance = getCustomPropertiesResolverInstance();
}
return customPropertiesResolverInstance.getCustomPropertiesMap(execution);
}
// Task listener
@Override
public void notify(DelegateTask delegateTask) {
TaskListener taskListenerInstance = getTaskListenerInstance();
CommandContextUtil.getProcessEngineConfiguration().getDelegateInterceptor().handleInvocation(new TaskListenerInvocation(taskListenerInstance, delegateTask));
}
@Override
public void notify(String processInstanceId, String executionId, Task task, Map executionVariables, Map customPropertiesMap) {
TransactionDependentTaskListener transactionDependentTaskListenerInstance = getTransactionDependentTaskListenerInstance();
transactionDependentTaskListenerInstance.notify(processInstanceId, executionId, task, executionVariables, customPropertiesMap);
}
protected ExecutionListener getExecutionListenerInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof ExecutionListener) {
return (ExecutionListener) delegateInstance;
} else if (delegateInstance instanceof JavaDelegate) {
return new ServiceTaskJavaDelegateActivityBehavior((JavaDelegate) delegateInstance, triggerable, skipExpression);
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + ExecutionListener.class + " nor " + JavaDelegate.class);
}
}
protected TransactionDependentExecutionListener getTransactionDependentExecutionListenerInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof TransactionDependentExecutionListener) {
return (TransactionDependentExecutionListener) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + TransactionDependentExecutionListener.class);
}
}
protected CustomPropertiesResolver getCustomPropertiesResolverInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof CustomPropertiesResolver) {
return (CustomPropertiesResolver) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + CustomPropertiesResolver.class);
}
}
protected TaskListener getTaskListenerInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof TaskListener) {
return (TaskListener) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + TaskListener.class);
}
}
protected TransactionDependentTaskListener getTransactionDependentTaskListenerInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof TransactionDependentTaskListener) {
return (TransactionDependentTaskListener) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + TransactionDependentTaskListener.class);
}
}
// Activity Behavior
@Override
public void execute(DelegateExecution execution) {
if (CommandContextUtil.getProcessEngineConfiguration().isEnableProcessDefinitionInfoCache()) {
ObjectNode taskElementProperties = BpmnOverrideContext.getBpmnOverrideElementProperties(serviceTaskId, execution.getProcessDefinitionId());
if (taskElementProperties != null && taskElementProperties.has(DynamicBpmnConstants.SERVICE_TASK_CLASS_NAME)) {
String overrideClassName = taskElementProperties.get(DynamicBpmnConstants.SERVICE_TASK_CLASS_NAME).asText();
if (StringUtils.isNotEmpty(overrideClassName) && !overrideClassName.equals(className)) {
className = overrideClassName;
activityBehaviorInstance = null;
}
}
}
if (activityBehaviorInstance == null) {
activityBehaviorInstance = getActivityBehaviorInstance();
}
try {
activityBehaviorInstance.execute(execution);
} catch (BpmnError error) {
ErrorPropagation.propagateError(error, execution);
} catch (RuntimeException e) {
if (!ErrorPropagation.mapException(e, (ExecutionEntity) execution, mapExceptions)) {
throw e;
}
}
}
// Signallable activity behavior
@Override
public void trigger(DelegateExecution execution, String signalName, Object signalData) {
if (activityBehaviorInstance == null) {
activityBehaviorInstance = getActivityBehaviorInstance();
}
if (activityBehaviorInstance instanceof TriggerableActivityBehavior) {
((TriggerableActivityBehavior) activityBehaviorInstance).trigger(execution, signalName, signalData);
if (triggerable) {
leave(execution);
}
} else {
throw new FlowableException("signal() can only be called on a " + TriggerableActivityBehavior.class.getName() + " instance");
}
}
// Subprocess activityBehaviour
@Override
public void completing(DelegateExecution execution, DelegateExecution subProcessInstance) throws Exception {
if (activityBehaviorInstance == null) {
activityBehaviorInstance = getActivityBehaviorInstance();
}
if (activityBehaviorInstance instanceof SubProcessActivityBehavior) {
((SubProcessActivityBehavior) activityBehaviorInstance).completing(execution, subProcessInstance);
} else {
throw new FlowableException("completing() can only be called on a " + SubProcessActivityBehavior.class.getName() + " instance");
}
}
@Override
public void completed(DelegateExecution execution) throws Exception {
if (activityBehaviorInstance == null) {
activityBehaviorInstance = getActivityBehaviorInstance();
}
if (activityBehaviorInstance instanceof SubProcessActivityBehavior) {
((SubProcessActivityBehavior) activityBehaviorInstance).completed(execution);
} else {
throw new FlowableException("completed() can only be called on a " + SubProcessActivityBehavior.class.getName() + " instance");
}
}
protected ActivityBehavior getActivityBehaviorInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof ActivityBehavior) {
return determineBehaviour((ActivityBehavior) delegateInstance);
} else if (delegateInstance instanceof JavaDelegate) {
return determineBehaviour(new ServiceTaskJavaDelegateActivityBehavior((JavaDelegate) delegateInstance, triggerable, skipExpression));
} else if (delegateInstance instanceof FutureJavaDelegate) {
return determineBehaviour(new ServiceTaskFutureJavaDelegateActivityBehavior((FutureJavaDelegate) delegateInstance, triggerable, skipExpression, mapExceptions));
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + JavaDelegate.class.getName() + ", " + FutureJavaDelegate.class.getName() + " nor " + ActivityBehavior.class.getName());
}
}
// Adds properties to the given delegation instance (eg multi instance) if needed
protected ActivityBehavior determineBehaviour(ActivityBehavior delegateInstance) {
if (hasMultiInstanceCharacteristics()) {
multiInstanceActivityBehavior.setInnerActivityBehavior((AbstractBpmnActivityBehavior) delegateInstance);
return multiInstanceActivityBehavior;
}
return delegateInstance;
}
}
