public static LiveRef read(ObjectInput in, boolean useNewFormat)
throws IOException, ClassNotFoundException {
Endpoint ep;
ObjID id;
// Now read in the endpoint, id, and result flag
// (need to choose whether or not to read old JDK1.1 endpoint format)
if (useNewFormat) {
ep = TCPEndpoint.read(in);
} else {
ep = TCPEndpoint.readHostPortFormat(in);
}
id = ObjID.read(in);
boolean isResultStream = in.readBoolean();
LiveRef ref = new LiveRef(id, ep, false);
if (in instanceof ConnectionInputStream) {
ConnectionInputStream stream = (ConnectionInputStream) in;
// save ref to send "dirty" call after all args/returns
// have been unmarshaled.
stream.saveRef(ref);
if (isResultStream) {
// set flag in stream indicating that remote objects were
// unmarshaled. A DGC ack should be sent by the transport.
stream.setAckNeeded();
}
} else {
DGCClient.registerRefs(ep, Arrays.asList(new LiveRef[] {ref}));
}
return ref;
}
public boolean remoteEquals(Object obj) {
if (obj != null && obj instanceof LiveRef) {
LiveRef ref = (LiveRef) obj;
TCPEndpoint thisEp = ((TCPEndpoint) ep);
TCPEndpoint refEp = ((TCPEndpoint) ref.ep);
RMIClientSocketFactory thisClientFactory = thisEp.getClientSocketFactory();
RMIClientSocketFactory refClientFactory = refEp.getClientSocketFactory();
/**
* Fix for 4254103: LiveRef.remoteEquals should not fail if one of the objects in the
* comparison has a null server socket. Comparison should only consider the following
* criteria:
*
* <p>hosts, ports, client socket factories and object IDs.
*/
if (thisEp.getPort() != refEp.getPort() || !thisEp.getHost().equals(refEp.getHost())) {
return false;
}
if ((thisClientFactory == null) ^ (refClientFactory == null)) {
return false;
}
if ((thisClientFactory != null)
&& !((thisClientFactory.getClass() == refClientFactory.getClass())
&& (thisClientFactory.equals(refClientFactory)))) {
return false;
}
return (id.equals(ref.id));
} else {
return false;
}
}
public boolean equals(Object obj) {
if (obj != null && obj instanceof LiveRef) {
LiveRef ref = (LiveRef) obj;
return (ep.equals(ref.ep) && id.equals(ref.id) && isLocal == ref.isLocal);
} else {
return false;
}
}
public void write(ObjectOutput out, boolean useNewFormat) throws IOException {
boolean isResultStream = false;
if (out instanceof ConnectionOutputStream) {
ConnectionOutputStream stream = (ConnectionOutputStream) out;
isResultStream = stream.isResultStream();
/*
* If this LiveRef is being marshalled as part of a return value,
* then we have to worry about referential integrity being broken
* while the reference is in transit, in case there no longer
* remains a strong reference in this VM after the call has
* completed. Therefore, we tell the stream to save a reference
* until an acknowledgment has been received from the caller; for
* "local" LiveRefs, save a reference to the impl directly,
* because the impl is not reachable from this LiveRef (see
* 4114579); otherwise, save a reference to the LiveRef, for the
* client-side DGC to watch over (see 4017232 for more details).
*/
if (isResultStream) {
if (isLocal) {
Target target = ObjectTable.getTarget(id);
if (target != null) {
Remote impl = target.getImpl();
if (impl != null) {
stream.saveObject(impl);
}
}
} else {
stream.saveObject(this);
}
}
}
// All together now write out the endpoint, id, and flag
// (need to choose whether or not to use old JDK1.1 endpoint format)
if (useNewFormat) {
((TCPEndpoint) ep).write(out);
} else {
((TCPEndpoint) ep).writeHostPortFormat(out);
}
id.write(out);
out.writeBoolean(isResultStream);
}
public int hashCode() {
return id.hashCode();
}