/**
* Message contains MethodCall. Execute it against *this* object and return result. Use
* MethodCall.invoke() to do this. Return result.
*/
public Object handle(Message req) {
Object body;
MethodCall method_call;
if (server_obj == null) {
if (log.isErrorEnabled()) log.error("no method handler is registered. Discarding request.");
return null;
}
if (req == null || req.getLength() == 0) {
if (log.isErrorEnabled()) log.error("message or message buffer is null");
return null;
}
try {
body =
req_marshaller != null
? req_marshaller.objectFromByteBuffer(
req.getBuffer(), req.getOffset(), req.getLength())
: req.getObject();
} catch (Throwable e) {
if (log.isErrorEnabled()) log.error("exception marshalling object", e);
return e;
}
if (!(body instanceof MethodCall)) {
if (log.isErrorEnabled()) log.error("message does not contain a MethodCall object");
// create an exception to represent this and return it
return new IllegalArgumentException("message does not contain a MethodCall object");
}
method_call = (MethodCall) body;
try {
if (log.isTraceEnabled())
log.trace("[sender=" + req.getSrc() + "], method_call: " + method_call);
if (method_call.getMode() == MethodCall.ID) {
if (method_lookup == null)
throw new Exception(
"MethodCall uses ID=" + method_call.getId() + ", but method_lookup has not been set");
Method m = method_lookup.findMethod(method_call.getId());
if (m == null) throw new Exception("no method found for " + method_call.getId());
method_call.setMethod(m);
}
return method_call.invoke(server_obj);
} catch (Throwable x) {
return x;
}
}
public <T> NotifyingFuture<T> callRemoteMethodWithFuture(
Address dest, MethodCall call, RequestOptions options) throws Throwable {
if (log.isTraceEnabled())
log.trace("dest=" + dest + ", method_call=" + call + ", options=" + options);
Object buf =
req_marshaller != null
? req_marshaller.objectToBuffer(call)
: Util.objectToByteBuffer(call);
Message msg = new Message(dest, null, null);
if (buf instanceof Buffer) msg.setBuffer((Buffer) buf);
else msg.setBuffer((byte[]) buf);
msg.setFlag(options.getFlags());
if (options.getScope() > 0) msg.setScope(options.getScope());
return super.sendMessageWithFuture(msg, options);
}
/**
* Invokes a method in all members contained in dests (or all members if dests is null).
*
* @param dests A list of addresses. If null, the method will be invoked on all cluster members
* @param method_call The method (plus args) to be invoked
* @param options A collection of call options, e.g. sync versus async, timeout etc
* @return RspList A list of return values and flags (suspected, not received) per member
* @since 2.9
*/
public RspList callRemoteMethods(
Collection<Address> dests, MethodCall method_call, RequestOptions options) {
if (dests != null && dests.isEmpty()) { // don't send if dest list is empty
if (log.isTraceEnabled())
log.trace(
new StringBuilder("destination list of ")
.append(method_call.getName())
.append("() is empty: no need to send message"));
return RspList.EMPTY_RSP_LIST;
}
if (log.isTraceEnabled())
log.trace(
new StringBuilder("dests=")
.append(dests)
.append(", method_call=")
.append(method_call)
.append(", options=")
.append(options));
Object buf;
try {
buf =
req_marshaller != null
? req_marshaller.objectToBuffer(method_call)
: Util.objectToByteBuffer(method_call);
} catch (Exception e) {
// if(log.isErrorEnabled()) log.error("exception", e);
// we will change this in 3.0 to add the exception to the signature
// (see http://jira.jboss.com/jira/browse/JGRP-193). The reason for a RTE is that we cannot
// change the
// signature in 2.3, otherwise 2.3 would be *not* API compatible to prev releases
throw new RuntimeException("failure to marshal argument(s)", e);
}
Message msg = new Message();
if (buf instanceof Buffer) msg.setBuffer((Buffer) buf);
else msg.setBuffer((byte[]) buf);
msg.setFlag(options.getFlags());
if (options.getScope() > 0) msg.setScope(options.getScope());
RspList retval = super.castMessage(dests, msg, options);
if (log.isTraceEnabled()) log.trace("responses: " + retval);
return retval;
}
public Object callRemoteMethod(Address dest, MethodCall call, RequestOptions options)
throws Throwable {
if (log.isTraceEnabled())
log.trace("dest=" + dest + ", method_call=" + call + ", options=" + options);
Object buf =
req_marshaller != null
? req_marshaller.objectToBuffer(call)
: Util.objectToByteBuffer(call);
Message msg = new Message(dest, null, null);
if (buf instanceof Buffer) msg.setBuffer((Buffer) buf);
else msg.setBuffer((byte[]) buf);
msg.setFlag(options.getFlags());
if (options.getScope() > 0) msg.setScope(options.getScope());
Object retval = super.sendMessage(msg, options);
if (log.isTraceEnabled()) log.trace("retval: " + retval);
if (retval instanceof Throwable) throw (Throwable) retval;
return retval;
}
