package org.apache.synapse.config.xml;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMElement;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.SynapseException;
import org.apache.synapse.task.TaskManager;
import javax.xml.namespace.QName;
import java.util.Iterator;
import java.util.Properties;
public class TaskManagerFactory {
private static final Log log = LogFactory.getLog(TaskManagerFactory.class);
public static final QName PROVIDER_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "provider");
public static final QName PARAMETER_Q
= new QName(XMLConfigConstants.SYNAPSE_NAMESPACE, "parameter");
public static final QName NAME_Q
= new QName(XMLConfigConstants.NULL_NAMESPACE, "name");
public static TaskManager createTaskManager(OMElement elem, Properties properties) {
OMAttribute prov = elem.getAttribute(PROVIDER_Q);
if (prov != null) {
try {
Class provider = Class.forName(prov.getAttributeValue());
TaskManager taskManager = (TaskManager) provider.newInstance();
taskManager.init(getProperties(elem, properties));
taskManager.setConfigurationProperties(getProperties(elem, properties));
return taskManager;
} catch (ClassNotFoundException e) {
handleException("Cannot locate task provider class : " +
prov.getAttributeValue(), e);
} catch (IllegalAccessException e) {
handleException("Error instantiating task provider : " +
prov.getAttributeValue(), e);
} catch (InstantiationException e) {
handleException("Error instantiating task provider : " +
prov.getAttributeValue(), e);
}
} else {
handleException("The task 'provider' " +
"attribute is required for a taskManager definition");
}
return null;
}
private static Properties getProperties(OMElement elem, Properties topLevelProps) {
Iterator params = elem.getChildrenWithName(PARAMETER_Q);
Properties props = new Properties(topLevelProps);
while (params.hasNext()) {
Object o = params.next();
if (o instanceof OMElement) {
OMElement prop = (OMElement) o;
OMAttribute pname = prop.getAttribute(NAME_Q);
String propertyValue = prop.getText();
if (pname != null) {
if (propertyValue != null) {
props.setProperty(pname.getAttributeValue(), propertyValue.trim());
}
} else {
handleException("Invalid taskManager property - property should have a name ");
}
} else {
handleException("Invalid taskManager property");
}
}
return props;
}
private static void handleException(String msg) {
log.error(msg);
throw new SynapseException(msg);
}
private static void handleException(String msg, Exception e) {
log.error(msg, e);
throw new SynapseException(msg, e);
}
}