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package com.sun.enterprise.deployment.node.ejb;
import com.sun.enterprise.deployment.ConcurrentMethodDescriptor;
import com.sun.enterprise.deployment.Descriptor;
import com.sun.enterprise.deployment.TimeoutValueDescriptor;
import com.sun.enterprise.deployment.node.DeploymentDescriptorNode;
import com.sun.enterprise.deployment.node.MethodNode;
import com.sun.enterprise.deployment.node.XMLElement;
import com.sun.enterprise.deployment.xml.EjbTagNames;
import org.w3c.dom.Node;
public class ConcurrentMethodNode extends DeploymentDescriptorNode {
ConcurrentMethodDescriptor descriptor = null;
private static final String READ_LOCK = "Read";
private static final String WRITE_LOCK = "Write";
public ConcurrentMethodNode() {
super();
registerElementHandler(new XMLElement(EjbTagNames.METHOD), MethodNode.class,
"setConcurrentMethod");
registerElementHandler(new XMLElement(EjbTagNames.CONCURRENT_ACCESS_TIMEOUT),
TimeoutValueNode.class, "setAccessTimeout");
}
/**
* @return the Descriptor subclass that was populated by reading
* the source XML file
*/
public Object getDescriptor() {
if (descriptor == null) {
descriptor = (ConcurrentMethodDescriptor) new ConcurrentMethodDescriptor();
}
return descriptor;
}
/**
* receives notiification of the value for a particular tag
*
* @param element the xml element
* @param value it's associated value
*/
public void setElementValue(XMLElement element, String value) {
if (EjbTagNames.CONCURRENT_LOCK.equals(element.getQName())) {
descriptor.setWriteLock(value.equals(WRITE_LOCK));
} else {
super.setElementValue(element, value);
}
}
/**
* write the descriptor class to a DOM tree and return it
*
* @param parent node for the DOM tree
* @param node name for the root element of this xml fragment
* @param the descriptor to write
* @return the DOM tree top node
*/
public Node writeDescriptor(Node parent, String nodeName, Descriptor descriptor) {
if (! (descriptor instanceof ConcurrentMethodDescriptor)) {
throw new IllegalArgumentException(getClass()
+ " cannot handles descriptors of type " + descriptor.getClass());
}
ConcurrentMethodDescriptor desc = (ConcurrentMethodDescriptor) descriptor;
Node concurrentNode = super.writeDescriptor(parent, nodeName, descriptor);
MethodNode methodNode = new MethodNode();
methodNode.writeJavaMethodDescriptor(concurrentNode, EjbTagNames.METHOD,
desc.getConcurrentMethod());
if( desc.hasLockMetadata() ) {
String lockType = desc.isWriteLocked() ? "Write" : "Read";
appendTextChild(concurrentNode, EjbTagNames.CONCURRENT_LOCK, lockType);
}
if( desc.hasAccessTimeout() ) {
TimeoutValueNode timeoutValueNode = new TimeoutValueNode();
TimeoutValueDescriptor timeoutDesc = new TimeoutValueDescriptor();
timeoutDesc.setValue(desc.getAccessTimeoutValue());
timeoutDesc.setUnit(desc.getAccessTimeoutUnit());
timeoutValueNode.writeDescriptor(concurrentNode, EjbTagNames.CONCURRENT_ACCESS_TIMEOUT,
timeoutDesc);
}
return concurrentNode;
}
}