/* 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.camel;
/**
* @author Saeid Mirzaei
* @author Maciej Próchniak
* @author Arnold Schrijver
*/
import org.activiti.engine.IdentityService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.runtime.Execution;
import org.activiti.engine.runtime.ProcessInstance;
import org.apache.camel.Exchange;
import org.apache.camel.impl.DefaultProducer;
public class ActivitiProducer extends DefaultProducer {
private IdentityService identityService;
private RuntimeService runtimeService;
public static final String PROCESS_KEY_PROPERTY = "PROCESS_KEY_PROPERTY";
public static final String PROCESS_ID_PROPERTY = "PROCESS_ID_PROPERTY";
private final long timeout;
private final long timeResolution;
private String processKey = null;
private String activity = null;
public ActivitiProducer(ActivitiEndpoint endpoint, RuntimeService runtimeService, long timeout, long timeResolution) {
super(endpoint);
this.runtimeService = runtimeService;
String[] path = endpoint.getEndpointKey().split(":");
processKey = path[1].replace("//", "");
if (path.length > 2) {
activity = path[2];
}
this.timeout = timeout;
this.timeResolution = timeResolution;
}
public void setIdentityService(IdentityService identityService) {
this.identityService = identityService;
}
public void process(Exchange exchange) throws Exception {
if (shouldStartProcess()) {
ProcessInstance pi = startProcess(exchange);
exchange.setProperty(PROCESS_ID_PROPERTY, pi.getProcessInstanceId());
exchange.getOut().setBody(pi.getId());
} else {
signal(exchange);
}
}
private boolean shouldStartProcess() {
return activity == null;
}
private void signal(Exchange exchange) {
String processInstanceId = findProcessInstanceId(exchange);
boolean firstTime = true;
long initialTime = System.currentTimeMillis();
Execution execution = null;
while (firstTime || (timeout > 0 && (System.currentTimeMillis() - initialTime < timeout))) {
execution = runtimeService.createExecutionQuery()
.processDefinitionKey(processKey)
.processInstanceId(processInstanceId)
.activityId(activity).singleResult();
try {
Thread.sleep(timeResolution);
} catch (InterruptedException e) {
throw new RuntimeException("error occured while waiting for activiti=" + activity + " for processInstanceId=" + processInstanceId);
}
firstTime = false;
if (execution != null) {
break;
}
}
if (execution == null) {
throw new RuntimeException("Couldn't find activity "+activity+" for processId " + processInstanceId + " in defined timeout.");
}
runtimeService.setVariables(execution.getId(), ExchangeUtils.prepareVariables(exchange, getActivitiEndpoint()));
runtimeService.signal(execution.getId());
}
private String findProcessInstanceId(Exchange exchange) {
String processInstanceId = exchange.getProperty(PROCESS_ID_PROPERTY, String.class);
if (processInstanceId != null) {
return processInstanceId;
}
String processInstanceKey = exchange.getProperty(PROCESS_KEY_PROPERTY, String.class);
ProcessInstance processInstance = runtimeService.createProcessInstanceQuery()
.processInstanceBusinessKey(processInstanceKey).singleResult();
if (processInstance == null) {
throw new RuntimeException("Could not find activiti with key " + processInstanceKey);
}
return processInstance.getId();
}
private ProcessInstance startProcess(Exchange exchange) {
ActivitiEndpoint endpoint = getActivitiEndpoint();
String key = exchange.getProperty(PROCESS_KEY_PROPERTY, String.class);
try {
if (endpoint.isSetProcessInitiator()) {
setProcessInitiator(ExchangeUtils.prepareInitiator(exchange, endpoint));
}
if (key == null) {
return runtimeService.startProcessInstanceByKey(processKey, ExchangeUtils.prepareVariables(exchange, endpoint));
} else {
return runtimeService.startProcessInstanceByKey(processKey, key, ExchangeUtils.prepareVariables(exchange, endpoint));
}
} finally {
if (endpoint.isSetProcessInitiator()) {
setProcessInitiator(null);
}
}
}
private void setProcessInitiator(String processInitiator) {
if (identityService == null) {
throw new RuntimeException("IdentityService is missing and must be provided to set process initiator.");
}
identityService.setAuthenticatedUserId(processInitiator);
}
protected ActivitiEndpoint getActivitiEndpoint() {
return (ActivitiEndpoint) getEndpoint();
}
}