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package com.sun.enterprise.deployment;
import com.sun.enterprise.deployment.types.MessageDestinationReferencer;
import java.io.Serializable;
import java.util.Set;
import java.util.Iterator;
/**
* Shared implementation for deployment descriptor entities that can refer
* to a message destination. Each MessageDestinationReferencer has an
* owner. The owner can either be a MessageDestinationReference
* or a MessageDrivenBean.
*
* @author Kenneth Saks
*
*/
public class MessageDestinationReferencerImpl implements
MessageDestinationReferencer, Serializable {
// holds the name of the message destination link.
private String messageDestinationLinkName=null;
// In case the reference has been resolved, this points to the
// referenced message destination.
private MessageDestinationDescriptor messageDestination=null;
private MessageDestinationReferenceDescriptor ownerMsgDestRef = null;
private EjbMessageBeanDescriptor ownerMsgBean = null;
public MessageDestinationReferencerImpl(MessageDestinationReferencerImpl other) {
//super(other);
messageDestinationLinkName = other.messageDestinationLinkName; // immutable String
messageDestination = other.messageDestination; // copy as-is
ownerMsgDestRef = other.ownerMsgDestRef; // copy as-is
ownerMsgBean = other.ownerMsgBean; // copy as-is
}
public MessageDestinationReferencerImpl(Descriptor desc) {
if( desc instanceof MessageDestinationReferenceDescriptor ) {
ownerMsgDestRef = (MessageDestinationReferenceDescriptor) desc;
} else if( desc instanceof EjbMessageBeanDescriptor ) {
ownerMsgBean = (EjbMessageBeanDescriptor) desc;
} else {
throw new IllegalArgumentException("Invalid desc = " + desc);
}
}
/**
* True if the owner is a message destination reference.
*/
public boolean ownedByMessageDestinationRef() {
return (ownerMsgDestRef != null);
}
/**
* Get the descriptor for the message destination reference owner.
*/
public MessageDestinationReferenceDescriptor getMessageDestinationRefOwner
() {
return ownerMsgDestRef;
}
/**
* True if the owner is a message-driven bean.
*/
public boolean ownedByMessageBean() {
return (ownerMsgBean != null);
}
/**
* Get the descriptor for the message-driven bean owner.
*/
public EjbMessageBeanDescriptor getMessageBeanOwner() {
return ownerMsgBean;
}
/**
* True if this reference has been resolved to a valid MessageDestination
* object.
*/
public boolean isLinkedToMessageDestination() {
return (messageDestination != null);
}
private BundleDescriptor getBundleDescriptor() {
return ownedByMessageDestinationRef() ?
ownerMsgDestRef.getReferringBundleDescriptor() :
ownerMsgBean.getEjbBundleDescriptor();
}
/**
* @return the link name of the message destination to which I refer
* NOTE that this "link name" is potentially different from the actual
* name of the target message destination, since the message destination
* could be defined in a different module.
*/
public String getMessageDestinationLinkName() {
return messageDestinationLinkName;
}
/**
* Sets the name of the message destination to which I refer.
* NOTE : Does *NOT* attempt to resolve link name. Use
* alternate version of setMessageDestinationLinkName or resolveLink
* if link resolution is required.
*/
public void setMessageDestinationLinkName(String linkName) {
setMessageDestinationLinkName(linkName, false);
}
/**
* Sets the name of the message destination to which I refer.
* @param resolve if true, *try* to resolve link to the target message
* destination.
*
* @return MessageDestination to which link was resolved, or null if
* link name resolution failed.
*/
public MessageDestinationDescriptor setMessageDestinationLinkName
(String linkName, boolean resolve) {
messageDestinationLinkName = linkName;
MessageDestinationDescriptor msgDest = null;
if( resolve ) {
msgDest = resolveLinkName();
}
return msgDest;
}
/**
* Try to resolve the current link name value to a MessageDestination
* object.
*
* @return MessageDestination to which link was resolved, or null if
* link name resolution failed.
*/
public MessageDestinationDescriptor resolveLinkName() {
MessageDestinationDescriptor msgDest = null;
String linkName = messageDestinationLinkName;
if( (linkName != null) && (linkName.length() > 0) ) {
int hashIndex = linkName.indexOf('#');
BundleDescriptor bundleDescriptor = getBundleDescriptor();
Application app = bundleDescriptor.getApplication();
BundleDescriptor targetBundle = bundleDescriptor;
String msgDestName = linkName;
if( app != null ) {
// explicit reference to another module
if( hashIndex != -1 ) {
String relativeModuleUri = linkName.substring(0, hashIndex);
msgDestName = linkName.substring(hashIndex + 1);
targetBundle = app.getRelativeBundle(bundleDescriptor,
relativeModuleUri);
} else {
// Default is to find message destination within this
// module. If it's not there, try searching the other
// modules. NOTE that it's up to the deployer to ensure
// that any message destinations that are referred to
// from outside the defining module without an explicit
// reference have names that are unique within all the
// message destinations in the .ear. There is no
// required search ordering.
if( !bundleDescriptor.hasMessageDestinationByName
(msgDestName) ) {
Set modules = app.getBundleDescriptors();
for(Iterator iter = modules.iterator(); iter.hasNext();)
{
BundleDescriptor next=(BundleDescriptor)iter.next();
if( next.hasMessageDestinationByName(msgDestName) ) {
targetBundle = next;
break;
}
}
}
}
}
try {
if( targetBundle != null ) {
msgDest = targetBundle.getMessageDestinationByName
(msgDestName);
}
} catch(IllegalArgumentException iae) {}
}
if( msgDest != null ) {
setMessageDestination(msgDest);
}
return msgDest;
}
/**
* @return the message destination to which I refer. Can be NULL.
*/
public MessageDestinationDescriptor getMessageDestination() {
return messageDestination;
}
/**
* @param messageDestiation the message destination to which I refer.
*/
public void setMessageDestination(MessageDestinationDescriptor newMsgDest) {
if( messageDestination != null ) {
messageDestination.removeReferencer(this);
}
if( newMsgDest != null ) {
newMsgDest.addReferencer(this);
// Keep message destination link name in synch with message
// destination object.
BundleDescriptor bundleDescriptor = getBundleDescriptor();
BundleDescriptor targetBundleDescriptor =
newMsgDest.getBundleDescriptor();
String linkName = newMsgDest.getName();
if( bundleDescriptor != targetBundleDescriptor ) {
Application app = bundleDescriptor.getApplication();
String relativeUri = app.getRelativeUri(bundleDescriptor,
targetBundleDescriptor);
linkName = relativeUri + "#" + linkName;
}
messageDestinationLinkName = linkName;
}
messageDestination = newMsgDest;
}
}
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