/*
*
* 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.airavata.xbaya.invoker;
import org.apache.airavata.common.utils.XMLUtil;
import org.apache.airavata.workflow.model.exceptions.WorkflowException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import xsul.wsdl.WsdlDefinitions;
import xsul.wsif.WSIFMessage;
import xsul.wsif.WSIFOperation;
import xsul.xwsif_runtime_async.WSIFAsyncResponsesCorrelator;
import xsul.xwsif_runtime_async_http.XsulSoapHttpWsaResponsesCorrelator;
public class AsynchronousInvoker extends SimpleInvoker {
private static final Logger logger = LoggerFactory.getLogger(AsynchronousInvoker.class);
private String messageBoxURL;
/**
* Constructs an AsynchronousInvoker.
*
* @param definitions
*/
public AsynchronousInvoker(WsdlDefinitions definitions) {
this(definitions, null);
}
/**
* Constructs an AsynchronousInvoker.
*
* @param definitions
* @param messageBoxURL
*/
public AsynchronousInvoker(WsdlDefinitions definitions, String messageBoxURL) {
super(definitions);
this.messageBoxURL = messageBoxURL;
}
/**
* @see org.apache.airavata.xbaya.invoker.SimpleInvoker#setup()
*/
@Override
public void setup() throws WorkflowException {
super.setup();
/* Set the output message to null to set teh output from async Listener */
WSIFAsyncResponsesCorrelator correlator;
if (this.messageBoxURL == null || this.messageBoxURL.length() == 0) {
correlator = new XsulSoapHttpWsaResponsesCorrelator();
String serverLoc = ((XsulSoapHttpWsaResponsesCorrelator) correlator).getServerLocation();
logger.debug("using async correlator at " + serverLoc);
} else {
correlator = new MsgBoxWsaResponsesCorrelator(this.messageBoxURL,this);
logger.debug("using message box at " + this.messageBoxURL);
}
this.client.useAsyncMessaging(correlator);
}
public boolean invoke() throws WorkflowException {
final WSIFOperation operation = this.getOperation();
final WSIFMessage inputMessage = this.getInputMessage();
this.setOutputMessage(null);
try {
new Thread() {
@Override
public void run() {
try {
operation.executeInputOnlyOperation(inputMessage);
} catch (Exception e) {
// Ignore the error.
logger.error("Error invoking GFac Service",e);
}
}
}.start();
while(this.getOutputMessage() == null){
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
logger.error("Error Waiting for the response from backend");
}
}
// Gfac operation failed, so xbaya side throws this exception
if("ErrorResponse".equals(XMLUtil.stringToXmlElement3(this.getOutputMessage().toString()).getName())){
// Here we do not throw an exception, because if we throw an exception Interpreter will catch it and do the unsubscription,
// which is not needed because if there's an gfac side error gfac will send a failure and unsubscription will be done in monitoring
// so if we send an exception we are attempting to do two unsubscriptions which will cause a one unsubscription to fail.
return false;
}
return true;
} catch (RuntimeException e) {
String message = "Error in invoking a service.";
throw new WorkflowException(message, e);
}
}
}