/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.servicemix.osworkflow.functions;
import java.util.Map;
import javax.jbi.messaging.MessageExchange;
import javax.jbi.messaging.MessagingException;
import javax.jbi.messaging.NormalizedMessage;
import javax.xml.transform.dom.DOMSource;
import org.w3c.dom.Node;
import com.opensymphony.module.propertyset.PropertySet;
import com.opensymphony.workflow.FunctionProvider;
import com.opensymphony.workflow.WorkflowException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.servicemix.jbi.jaxp.SourceTransformer;
import org.apache.servicemix.osworkflow.OSWorkflow;
import org.apache.servicemix.osworkflow.OSWorkflowEndpoint;
import org.apache.xpath.CachedXPathAPI;
public class ExampleFunction implements FunctionProvider {
private static Log logger = LogFactory.getLog(ExampleFunction.class);
/*
* (non-Javadoc)
*
* @see com.opensymphony.workflow.FunctionProvider#execute(java.util.Map,
* java.util.Map, com.opensymphony.module.propertyset.PropertySet)
*/
public void execute(Map transientVars, Map args, PropertySet propertySet)
throws WorkflowException {
logger.info("Executing function...");
NormalizedMessage msg = null;
OSWorkflowEndpoint ep = null;
boolean isAsynchron = false;
MessageExchange exchange = null;
if (transientVars.containsKey(OSWorkflow.KEY_ASYNC_PROCESSING)) {
isAsynchron = (Boolean) transientVars
.get(OSWorkflow.KEY_ASYNC_PROCESSING);
} else {
throw new WorkflowException(
"ExampleFunction: Missing transient variable for async object. ("
+ OSWorkflow.KEY_ASYNC_PROCESSING + ")");
}
if (transientVars.containsKey(OSWorkflow.KEY_EXCHANGE)) {
exchange = (MessageExchange) transientVars
.get(OSWorkflow.KEY_EXCHANGE);
} else {
throw new WorkflowException(
"ExampleFunction: Missing transient variable for exchange object. ("
+ OSWorkflow.KEY_EXCHANGE + ")");
}
if (transientVars.containsKey(OSWorkflow.KEY_IN_MESSAGE)) {
msg = (NormalizedMessage) transientVars
.get(OSWorkflow.KEY_IN_MESSAGE);
} else {
throw new WorkflowException(
"ExampleFunction: Missing transient variable for message object. ("
+ OSWorkflow.KEY_IN_MESSAGE + ")");
}
if (transientVars.containsKey(OSWorkflow.KEY_ENDPOINT)) {
ep = (OSWorkflowEndpoint) transientVars
.get(OSWorkflow.KEY_ENDPOINT);
} else {
throw new WorkflowException(
"ExampleFunction: Missing transient variable for endpoint object. ("
+ OSWorkflow.KEY_ENDPOINT + ")");
}
SourceTransformer sourceTransformer = new SourceTransformer();
try {
DOMSource inMessageXml = (DOMSource) sourceTransformer
.toDOMSource(msg.getContent());
// Parse out the actual message content
CachedXPathAPI xpath = new CachedXPathAPI();
Node exampleNode = xpath.selectSingleNode(inMessageXml.getNode(),
"/example");
if (exampleNode != null) {
String value = exampleNode.getTextContent();
logger.info("Received content: " + value);
propertySet.setString("ExampleKey", value);
} else {
throw new WorkflowException(
"ExampleFunction: Missing tag: example");
}
} catch (Exception ex) {
throw new WorkflowException(ex);
} finally {
// if the exchange came as asynchronous inOnly or RobustInOnly
// we will now send a receipt to the sender
try {
if (isAsynchron) {
ep.done(exchange);
}
} catch (MessagingException mex) {
throw new WorkflowException(mex);
}
}
}
}