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org.jbpm.workflow.instance.node.DynamicUtils Maven / Gradle / Ivy
/*
* Copyright 2017 Red Hat, Inc. and/or its affiliates.
*
* 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.jbpm.workflow.instance.node;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.regex.Matcher;
import org.drools.core.command.impl.CommandBasedStatefulKnowledgeSession;
import org.drools.core.event.ProcessEventSupport;
import org.drools.core.impl.StatefulKnowledgeSessionImpl;
import org.drools.core.process.instance.WorkItemManager;
import org.drools.core.process.instance.impl.WorkItemImpl;
import org.drools.mvel.MVELSafeHelper;
import org.jbpm.process.instance.InternalProcessRuntime;
import org.jbpm.process.instance.ProcessInstance;
import org.jbpm.process.instance.impl.ProcessInstanceImpl;
import org.jbpm.util.PatternConstants;
import org.jbpm.workflow.instance.WorkflowProcessInstance;
import org.jbpm.workflow.instance.impl.NodeInstanceImpl;
import org.jbpm.workflow.instance.impl.ProcessInstanceResolverFactory;
import org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl;
import org.kie.api.command.ExecutableCommand;
import org.kie.api.definition.process.Process;
import org.kie.api.runtime.Context;
import org.kie.api.runtime.EnvironmentName;
import org.kie.api.runtime.ExecutableRunner;
import org.kie.api.runtime.KieRuntime;
import org.kie.api.runtime.KieSession;
import org.kie.api.runtime.process.NodeInstance;
import org.kie.api.runtime.process.WorkItem;
import org.kie.internal.KieInternalServices;
import org.kie.internal.command.RegistryContext;
import org.kie.internal.process.CorrelationKey;
import org.kie.internal.process.CorrelationKeyFactory;
import org.kie.internal.runtime.StatefulKnowledgeSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DynamicUtils {
private static final Logger logger = LoggerFactory.getLogger(DynamicUtils.class);
public static void addDynamicWorkItem(
final DynamicNodeInstance dynamicContext,
KieRuntime ksession,
String workItemName,
Map parameters) {
final WorkflowProcessInstance processInstance = dynamicContext.getProcessInstance();
internalAddDynamicWorkItem(processInstance,
dynamicContext,
ksession,
workItemName,
parameters);
}
public static void addDynamicWorkItem(
final org.kie.api.runtime.process.ProcessInstance dynamicProcessInstance,
KieRuntime ksession,
String workItemName,
Map parameters) {
internalAddDynamicWorkItem((WorkflowProcessInstance) dynamicProcessInstance,
null,
ksession,
workItemName,
parameters);
}
private static void internalAddDynamicWorkItem(
final WorkflowProcessInstance processInstance,
final DynamicNodeInstance dynamicContext,
KieRuntime ksession,
String workItemName,
Map parameters) {
final WorkItemImpl workItem = new WorkItemImpl();
workItem.setState(WorkItem.ACTIVE);
workItem.setProcessInstanceId(processInstance.getId());
workItem.setDeploymentId((String) ksession.getEnvironment().get(EnvironmentName.DEPLOYMENT_ID));
workItem.setName(workItemName);
workItem.setParameters(parameters);
for (Map.Entry entry : workItem.getParameters().entrySet()) {
if (entry.getValue() instanceof String) {
String s = (String) entry.getValue();
Object variableValue = null;
Matcher matcher = PatternConstants.PARAMETER_MATCHER.matcher(s);
while (matcher.find()) {
String paramName = matcher.group(1);
variableValue = processInstance.getVariable(paramName);
if (variableValue == null) {
try {
variableValue = MVELSafeHelper.getEvaluator().eval(paramName,
new ProcessInstanceResolverFactory(processInstance));
} catch (Throwable t) {
logger.error("Could not find variable scope for variable {}",
paramName);
logger.error("when trying to replace variable in string for Dynamic Work Item {}",
workItemName);
logger.error("Continuing without setting parameter.");
}
}
}
if (variableValue != null) {
workItem.setParameter(entry.getKey(),
variableValue);
}
}
}
final WorkItemNodeInstance workItemNodeInstance = new WorkItemNodeInstance();
workItemNodeInstance.internalSetWorkItem(workItem);
workItemNodeInstance.setMetaData("NodeType",
workItemName);
workItem.setNodeInstanceId(workItemNodeInstance.getId());
if (ksession instanceof StatefulKnowledgeSessionImpl) {
workItemNodeInstance.setProcessInstance(processInstance);
workItemNodeInstance.setNodeInstanceContainer(dynamicContext == null ? processInstance : dynamicContext);
workItemNodeInstance.addEventListeners();
executeWorkItem((StatefulKnowledgeSessionImpl) ksession,
workItem,
workItemNodeInstance);
} else if (ksession instanceof CommandBasedStatefulKnowledgeSession) {
ExecutableRunner runner = ((CommandBasedStatefulKnowledgeSession) ksession).getRunner();
runner.execute(new ExecutableCommand() {
private static final long serialVersionUID = 5L;
public Void execute(Context context) {
StatefulKnowledgeSession ksession = (StatefulKnowledgeSession) ((RegistryContext) context).lookup(KieSession.class);
WorkflowProcessInstance realProcessInstance = (WorkflowProcessInstance) ksession.getProcessInstance(processInstance.getId());
workItemNodeInstance.setProcessInstance(realProcessInstance);
if (dynamicContext == null) {
workItemNodeInstance.setNodeInstanceContainer(realProcessInstance);
} else {
DynamicNodeInstance realDynamicContext = findDynamicContext(realProcessInstance,
dynamicContext.getUniqueId());
workItemNodeInstance.setNodeInstanceContainer(realDynamicContext);
}
workItemNodeInstance.addEventListeners();
executeWorkItem((StatefulKnowledgeSessionImpl) ksession,
workItem,
workItemNodeInstance);
return null;
}
});
} else {
throw new IllegalArgumentException("Unsupported ksession: " + ksession == null ? "null" : ksession.getClass().getName());
}
}
private static void executeWorkItem(StatefulKnowledgeSessionImpl ksession,
WorkItemImpl workItem,
WorkItemNodeInstance workItemNodeInstance) {
ProcessEventSupport eventSupport = ((InternalProcessRuntime)
ksession.getProcessRuntime()).getProcessEventSupport();
eventSupport.fireBeforeNodeTriggered(workItemNodeInstance,
ksession);
((WorkItemManager) ksession.getWorkItemManager()).internalExecuteWorkItem(workItem);
workItemNodeInstance.internalSetWorkItemId(workItem.getId());
eventSupport.fireAfterNodeTriggered(workItemNodeInstance,
ksession);
}
private static DynamicNodeInstance findDynamicContext(WorkflowProcessInstance processInstance,
String uniqueId) {
for (NodeInstance nodeInstance : ((WorkflowProcessInstanceImpl) processInstance).getNodeInstances(true)) {
if (uniqueId.equals(((NodeInstanceImpl) nodeInstance).getUniqueId())) {
return (DynamicNodeInstance) nodeInstance;
}
}
throw new IllegalArgumentException("Could not find node instance " + uniqueId);
}
public static long addDynamicSubProcess(
final DynamicNodeInstance dynamicContext,
KieRuntime ksession,
final String processId,
final Map parameters) {
final WorkflowProcessInstance processInstance = dynamicContext.getProcessInstance();
return internalAddDynamicSubProcess(processInstance,
dynamicContext,
ksession,
processId,
parameters);
}
public static long addDynamicSubProcess(
final org.kie.api.runtime.process.ProcessInstance processInstance,
KieRuntime ksession,
final String processId,
final Map parameters) {
return internalAddDynamicSubProcess((WorkflowProcessInstance) processInstance,
null,
ksession,
processId,
parameters);
}
public static long internalAddDynamicSubProcess(
final WorkflowProcessInstance processInstance,
final DynamicNodeInstance dynamicContext,
KieRuntime ksession,
final String processId,
final Map parameters) {
final SubProcessNodeInstance subProcessNodeInstance = new SubProcessNodeInstance();
subProcessNodeInstance.setNodeInstanceContainer(dynamicContext == null ? processInstance : dynamicContext);
subProcessNodeInstance.setProcessInstance(processInstance);
subProcessNodeInstance.setMetaData("NodeType",
"SubProcessNode");
if (ksession instanceof StatefulKnowledgeSessionImpl) {
return executeSubProcess((StatefulKnowledgeSessionImpl) ksession,
processId,
parameters,
processInstance,
subProcessNodeInstance);
} else if (ksession instanceof CommandBasedStatefulKnowledgeSession) {
ExecutableRunner commandService = ((CommandBasedStatefulKnowledgeSession) ksession).getRunner();
return commandService.execute(new ExecutableCommand() {
private static final long serialVersionUID = 5L;
public Long execute(Context context) {
StatefulKnowledgeSession ksession = (StatefulKnowledgeSession) ((RegistryContext) context).lookup(KieSession.class);
WorkflowProcessInstance realProcessInstance = (WorkflowProcessInstance) ksession.getProcessInstance(processInstance.getId());
subProcessNodeInstance.setProcessInstance(realProcessInstance);
if (dynamicContext == null) {
subProcessNodeInstance.setNodeInstanceContainer(realProcessInstance);
} else {
DynamicNodeInstance realDynamicContext = findDynamicContext(realProcessInstance,
dynamicContext.getUniqueId());
subProcessNodeInstance.setNodeInstanceContainer(realDynamicContext);
}
return executeSubProcess((StatefulKnowledgeSessionImpl) ksession,
processId,
parameters,
processInstance,
subProcessNodeInstance);
}
});
} else {
throw new IllegalArgumentException("Unsupported ksession: " + (ksession == null ? "null" : ksession.getClass().getName()));
}
}
private static long executeSubProcess(StatefulKnowledgeSessionImpl ksession,
String processId,
Map parameters,
ProcessInstance processInstance,
SubProcessNodeInstance subProcessNodeInstance) {
Process process = ksession.getKieBase().getProcess(processId);
if (process == null) {
logger.error("Could not find process {}",
processId);
throw new IllegalArgumentException("No process definition found with id: " + processId);
} else {
ProcessEventSupport eventSupport = ((InternalProcessRuntime) ksession.getProcessRuntime()).getProcessEventSupport();
eventSupport.fireBeforeNodeTriggered(subProcessNodeInstance,
ksession);
ProcessInstance subProcessInstance = null;
if (((WorkflowProcessInstanceImpl) processInstance).getCorrelationKey() != null) {
List businessKeys = new ArrayList<>();
businessKeys.add(((WorkflowProcessInstanceImpl) processInstance).getCorrelationKey());
businessKeys.add(processId);
businessKeys.add(UUID.randomUUID().toString());
CorrelationKeyFactory correlationKeyFactory = KieInternalServices.Factory.get().newCorrelationKeyFactory();
CorrelationKey subProcessCorrelationKey = correlationKeyFactory.newCorrelationKey(businessKeys);
subProcessInstance = (ProcessInstance) ksession.createProcessInstance(processId,
subProcessCorrelationKey,
parameters);
} else {
subProcessInstance = (ProcessInstance) ksession.createProcessInstance(processId,
parameters);
}
((ProcessInstanceImpl) subProcessInstance).setMetaData("ParentProcessInstanceId",
processInstance.getId());
((ProcessInstanceImpl) subProcessInstance).setParentProcessInstanceId(processInstance.getId());
subProcessInstance = (ProcessInstance) ksession.startProcessInstance(subProcessInstance.getId());
subProcessNodeInstance.internalSetProcessInstanceId(subProcessInstance.getId());
eventSupport.fireAfterNodeTriggered(subProcessNodeInstance,
ksession);
if (subProcessInstance.getState() == org.kie.api.runtime.process.ProcessInstance.STATE_COMPLETED) {
subProcessNodeInstance.triggerCompleted();
} else {
subProcessNodeInstance.addEventListeners();
}
return subProcessInstance.getId();
}
}
private DynamicUtils() {
// It is not allowed to create instances of util classes.
}
}
