/
GenericHTWorkItemHandler.java
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/
GenericHTWorkItemHandler.java
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/*
* Copyright 2012 JBoss by Red Hat.
*
* 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.process.workitem.wsht;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.jbpm.task.TaskService;
import org.jbpm.task.utils.OnErrorAction;
import org.drools.runtime.KnowledgeRuntime;
import org.drools.runtime.StatefulKnowledgeSession;
import org.jbpm.task.Task;
import org.jbpm.task.event.TaskEventKey;
import org.jbpm.task.service.ContentData;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.drools.runtime.process.WorkItem;
import org.drools.runtime.process.WorkItemManager;
import org.jbpm.eventmessaging.EventResponseHandler;
import org.jbpm.eventmessaging.Payload;
import org.jbpm.task.Content;
import org.jbpm.task.Status;
import org.jbpm.task.event.entity.TaskCompletedEvent;
import org.jbpm.task.event.entity.TaskEvent;
import org.jbpm.task.event.entity.TaskFailedEvent;
import org.jbpm.task.event.entity.TaskSkippedEvent;
import org.jbpm.task.service.PermissionDeniedException;
import org.jbpm.task.service.responsehandlers.AbstractBaseResponseHandler;
import org.jbpm.task.utils.ContentMarshallerHelper;
public class GenericHTWorkItemHandler extends AbstractHTWorkItemHandler {
private static final Logger logger = LoggerFactory.getLogger(GenericHTWorkItemHandler.class);
private TaskService client;
private String ipAddress;
private int port;
private boolean local = false;
private boolean connected = false;
private ClassLoader classLoader;
private boolean owningSessionOnly = false;
public GenericHTWorkItemHandler(KnowledgeRuntime session, OnErrorAction action) {
super(session, action);
}
public GenericHTWorkItemHandler(TaskService client, KnowledgeRuntime session, OnErrorAction action) {
super(session, action);
this.client = client;
}
public GenericHTWorkItemHandler(TaskService client, KnowledgeRuntime session, OnErrorAction action, ClassLoader classLoader) {
super(session, action);
this.client = client;
this.classLoader = classLoader;
}
public GenericHTWorkItemHandler(TaskService client, KnowledgeRuntime session) {
super(session);
this.client = client;
}
public GenericHTWorkItemHandler(TaskService client, KnowledgeRuntime session, boolean owningSessionOnly) {
super(session);
this.client = client;
this.owningSessionOnly = owningSessionOnly;
}
public GenericHTWorkItemHandler(KnowledgeRuntime session) {
super(session);
}
public GenericHTWorkItemHandler(KnowledgeRuntime session, boolean owningSessionOnly) {
super(session);
}
public TaskService getClient() {
return client;
}
public void setClient(TaskService client) {
this.client = client;
}
public void setIpAddress(String ipAddress) {
this.ipAddress = ipAddress;
}
public void setPort(int port) {
this.port = port;
}
public void setLocal(boolean local) {
this.local = local;
}
public boolean isConnected() {
return connected;
}
public String getIpAddress() {
return ipAddress;
}
public boolean isLocal() {
return local;
}
public int getPort() {
return port;
}
public ClassLoader getClassLoader() {
return classLoader;
}
public void setClassLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
}
protected void registerTaskEvents() {
TaskCompletedHandler eventResponseHandler = new TaskCompletedHandler();
TaskEventKey key = new TaskEventKey(TaskCompletedEvent.class, -1);
client.registerForEvent(key, false, eventResponseHandler);
eventHandlers.put(key, eventResponseHandler);
key = new TaskEventKey(TaskFailedEvent.class, -1);
client.registerForEvent(key, false, eventResponseHandler);
eventHandlers.put(key, eventResponseHandler);
key = new TaskEventKey(TaskSkippedEvent.class, -1);
client.registerForEvent(key, false, eventResponseHandler);
eventHandlers.put(key, eventResponseHandler);
}
public void connect() {
if (client == null) {
throw new IllegalStateException("You must set the Task Service Client to the work item to work");
}
if (ipAddress == null || ipAddress.equals("") || port <= 0) {
throw new IllegalStateException("You must set the IP and Port to the work item to work");
}
if (client != null) {
if(!connected){
connected = client.connect(ipAddress, port);
if (!connected) {
throw new IllegalArgumentException("Could not connect task client: on ip: "+ipAddress +" - port: "+port);
}
registerTaskEvents();
}
}
}
public void dispose() throws Exception {
for (TaskEventKey key : eventHandlers.keySet()) {
client.unregisterForEvent(key);
}
eventHandlers.clear();
if (client != null) {
client.disconnect();
}
}
@Override
public void executeWorkItem(WorkItem workItem, WorkItemManager manager) {
Task task = createTaskBasedOnWorkItemParams(workItem);
ContentData content = createTaskContentBasedOnWorkItemParams(workItem);
connect();
try {
client.addTask(task, content);
} catch (Exception e) {
if (action.equals(OnErrorAction.ABORT)) {
manager.abortWorkItem(workItem.getId());
} else if (action.equals(OnErrorAction.RETHROW)) {
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
} else {
throw new RuntimeException(e);
}
} else if (action.equals(OnErrorAction.LOG)) {
StringBuffer logMsg = new StringBuffer();
logMsg.append(new Date() + ": Error when creating task on task server for work item id " + workItem.getId());
logMsg.append(". Error reported by task server: " + e.getMessage());
logger.error(logMsg.toString(), e);
}
}
}
@Override
public void abortWorkItem(WorkItem workItem, WorkItemManager manager) {
Task task = client.getTaskByWorkItemId(workItem.getId());
if (task != null) {
try {
client.exit(task.getId(), "Administrator");
} catch (PermissionDeniedException e) {
logger.info(e.getMessage());
}
}
}
public boolean isOwningSessionOnly() {
return owningSessionOnly;
}
public void setOwningSessionOnly(boolean owningSessionOnly) {
this.owningSessionOnly = owningSessionOnly;
}
private class TaskCompletedHandler extends AbstractBaseResponseHandler implements EventResponseHandler {
public void execute(Payload payload) {
TaskEvent event = (TaskEvent) payload.get();
final long taskId = event.getTaskId();
if (owningSessionOnly && (session instanceof StatefulKnowledgeSession)) {
if (((StatefulKnowledgeSession) session).getId() != event.getSessionId()) {
return;
}
}
if (local) {
handleCompletedTask(taskId);
} else {
Runnable runnable = new Runnable() {
public void run() {
handleCompletedTask(taskId);
}
};
new Thread(runnable).start();
}
}
public boolean isRemove() {
return false;
}
public void handleCompletedTask(long taskId) {
Task task = client.getTask(taskId);
long workItemId = task.getTaskData().getWorkItemId();
if (task.getTaskData().getStatus() == Status.Completed) {
String userId = task.getTaskData().getActualOwner().getId();
Map<String, Object> results = new HashMap<String, Object>();
results.put("ActorId", userId);
long contentId = task.getTaskData().getOutputContentId();
if (contentId != -1) {
Content content = client.getContent(contentId);
Object result = ContentMarshallerHelper.unmarshall( content.getContent(), session.getEnvironment(), classLoader);
results.put("Result", result);
if (result instanceof Map) {
Map<?, ?> map = (Map<?, ?>) result;
for (Map.Entry<?, ?> entry : map.entrySet()) {
if (entry.getKey() instanceof String) {
results.put((String) entry.getKey(), entry.getValue());
}
}
}
session.getWorkItemManager().completeWorkItem(task.getTaskData().getWorkItemId(), results);
} else {
session.getWorkItemManager().completeWorkItem(workItemId, results);
}
} else {
session.getWorkItemManager().abortWorkItem(workItemId);
}
}
}
}