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;
}
private static void incomingMessageCall(UnicastConnection conn) throws IOException {
ObjectInputStream in = conn.startObjectInputStream(); // (re)start ObjectInputStream
ObjID objid = ObjID.read(in);
int method = in.readInt();
long hash = in.readLong();
// System.out.println("ObjID: " + objid + ", method: " + method + ", hash: " + hash);
// Use the objid to locate the relevant UnicastServerRef
UnicastServerRef uref = (UnicastServerRef) objects.get(objid);
Object returnval;
int returncode = RETURN_ACK;
// returnval is from Method.invoke(), so we must check the return class to see
// if it's primitive type
Class returncls = null;
if (uref != null) {
try {
// Dispatch the call to it.
returnval = uref.incomingMessageCall(conn, method, hash);
returncls = uref.getMethodReturnType(method, hash);
} catch (Exception e) {
returnval = e;
returncode = RETURN_NACK;
} catch (Error e) {
returnval =
new ServerError("An Error is thrown while processing the invocation on the server", e);
returncode = RETURN_NACK;
}
} else {
returnval = new NoSuchObjectException("");
returncode = RETURN_NACK;
}
conn.getDataOutputStream().writeByte(MESSAGE_CALL_ACK);
ObjectOutputStream out = conn.startObjectOutputStream(); // (re)start ObjectOutputStream
out.writeByte(returncode);
(new UID()).write(out);
// System.out.println("returnval=" + returnval + " returncls=" + returncls);
if (returnval != null && returncls != null)
((RMIObjectOutputStream) out).writeValue(returnval, returncls);
// 1.1/1.2 void return type detection:
else if (!(returnval instanceof RMIVoidValue || returncls == Void.TYPE))
out.writeObject(returnval);
out.flush();
}