/**
* 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.oodt.pcs.util;
//JDK imports
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collections;
import java.util.List;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;
//OODT imports
import org.apache.oodt.cas.workflow.structs.WorkflowInstance;
import org.apache.oodt.cas.workflow.system.XmlRpcWorkflowManagerClient;
import org.apache.xmlrpc.XmlRpcClient;
/**
*
* A set of utility methods that can be used by PCS that need to communicate
* with the Workflow Manager.
*
* @author mattmann
* @version $Revision$
*/
public class WorkflowManagerUtils {
/* our workflow manager client */
private XmlRpcWorkflowManagerClient client;
/* our log stream */
private static final Logger LOG = Logger.getLogger(WorkflowManagerUtils.class
.getName());
private URL wmUrl;
public WorkflowManagerUtils(String urlStr) {
this(safeGetUrlFromString(urlStr));
}
public WorkflowManagerUtils(URL url) {
this.client = new XmlRpcWorkflowManagerClient(url);
this.wmUrl = url;
}
public WorkflowManagerUtils(XmlRpcWorkflowManagerClient client) {
this.client = client;
}
public void updateWorkflowInstanceStatus(String wInstId, String status) {
try {
this.client.updateWorkflowInstanceStatus(wInstId, status);
} catch (Exception e) {
e.printStackTrace();
}
}
public List<WorkflowInstance> safeGetWorkflowInstances() {
if (!isConnected())
return Collections.EMPTY_LIST;
try {
return this.client.getWorkflowInstances();
} catch (Throwable ignore) {
return Collections.EMPTY_LIST;
}
}
public boolean isConnected() {
try {
XmlRpcClient c = new XmlRpcClient(this.client.getWorkflowManagerUrl());
c.execute("workflowmgr.getWorkflowInstances", new Vector());
return true;
} catch (Exception ignore) {
return false;
}
}
public List safeGetWorkflowInstancesByStatus(String status) {
try {
return this.client.getWorkflowInstancesByStatus(status);
} catch (Exception e) {
LOG.log(Level.WARNING,
"exception obtaining workflow instances by status: [" + status
+ "]: message: " + e.getMessage());
return null;
}
}
public int safeGetNumWorkflowInstancesByStatus(String status) {
try {
return this.client.getNumWorkflowInstancesByStatus(status);
} catch (Exception e) {
LOG.log(Level.WARNING,
"exception obtaining num workflow instances by status: [" + status
+ "]: message: " + e.getMessage());
return -1;
}
}
/**
* @return the client
*/
public XmlRpcWorkflowManagerClient getClient() {
return client;
}
/**
* @param client
* the client to set
*/
public void setClient(XmlRpcWorkflowManagerClient client) {
this.client = client;
if (this.client != null) {
this.wmUrl = this.client.getWorkflowManagerUrl();
}
}
private static URL safeGetUrlFromString(String urlStr) {
URL url = null;
try {
url = new URL(urlStr);
} catch (MalformedURLException e) {
LOG.log(Level.SEVERE, "PCS: Unable to generate url from url string: ["
+ urlStr + "]: Message: " + e.getMessage());
}
return url;
}
/**
*
* @return The {@link URL} pointer to the Workflow Manager that this
* WorkflowManagerUtils communicates with.
*/
public URL getWmUrl() {
return this.wmUrl;
}
}