package org.drools.process.instance.context.exception;
import org.drools.WorkingMemory;
import org.drools.base.DefaultKnowledgeHelper;
import org.drools.base.SequentialKnowledgeHelper;
import org.drools.common.InternalRuleBase;
import org.drools.process.core.context.exception.ActionExceptionHandler;
import org.drools.process.core.context.exception.ExceptionHandler;
import org.drools.process.instance.ContextInstanceContainer;
import org.drools.process.instance.ProcessInstance;
import org.drools.spi.Action;
import org.drools.spi.KnowledgeHelper;
import org.drools.spi.ProcessContext;
import org.drools.workflow.instance.NodeInstance;
public class DefaultExceptionScopeInstance extends ExceptionScopeInstance {
private static final long serialVersionUID = 4L;
public void handleException(ExceptionHandler handler, String exception, Object params) {
if (handler instanceof ActionExceptionHandler) {
Action action = (Action) ((ActionExceptionHandler) handler).getAction().getMetaData("Action");
try {
KnowledgeHelper knowledgeHelper = createKnowledgeHelper();
ProcessContext context = new ProcessContext();
ProcessInstance processInstance = getProcessInstance();
ContextInstanceContainer contextInstanceContainer = getContextInstanceContainer();
if (contextInstanceContainer instanceof NodeInstance) {
context.setNodeInstance((NodeInstance) contextInstanceContainer);
} else {
context.setProcessInstance(processInstance);
}
String faultVariable = handler.getFaultVariable();
if (faultVariable != null) {
context.setVariable(faultVariable, params);
}
action.execute(knowledgeHelper, ((ProcessInstance) processInstance).getWorkingMemory(), context);
} catch (Exception e) {
throw new RuntimeException("unable to execute Action", e);
}
} else {
throw new IllegalArgumentException("Unknown exception handler " + handler);
}
}
private KnowledgeHelper createKnowledgeHelper() {
WorkingMemory workingMemory = ((ProcessInstance) getProcessInstance()).getWorkingMemory();
if ( ((InternalRuleBase) workingMemory.getRuleBase()).getConfiguration().isSequential() ) {
return new SequentialKnowledgeHelper( workingMemory );
} else {
return new DefaultKnowledgeHelper( workingMemory );
}
}
}