/**
* Invokes a method in all members and expects responses from members contained in dests (or all
* members if dests is null).
*
* @param dests A list of addresses. If null, we'll wait for responses from 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
* @param listener A FutureListener which will be registered (if non null) with the future
* <em>before</em> the call is invoked
* @return NotifyingFuture A future from which the results can be fetched
* @throws Exception If the sending of the message threw an exception. Note that <em>no</em>
* exception will be thrown if any of the target members threw an exception; such an exception
* will be in the Rsp element for the particular member in the RspList
*/
public <T> NotifyingFuture<RspList<T>> callRemoteMethodsWithFuture(
Collection<Address> dests,
MethodCall method_call,
RequestOptions options,
FutureListener<RspList<T>> listener)
throws Exception {
if (dests != null && dests.isEmpty()) { // don't send if dest list is empty
if (log.isTraceEnabled())
log.trace(
"destination list of %s() is empty: no need to send message", method_call.getName());
return new NullFuture<>(new RspList());
}
if (log.isTraceEnabled())
log.trace("dests=%s, method_call=%s, options=%s", dests, method_call, options);
Buffer buf =
req_marshaller != null
? req_marshaller.objectToBuffer(method_call)
: Util.objectToBuffer(method_call);
Message msg = new Message().setBuffer(buf);
NotifyingFuture<RspList<T>> retval = super.castMessageWithFuture(dests, msg, options, listener);
if (log.isTraceEnabled()) log.trace("responses: %s", retval);
return retval;
}
/**
* Message contains MethodCall. Execute it against *this* object and return result. Use
* MethodCall.invoke() to do this. Return result.
*/
public Object handle(Message req) throws Exception {
if (server_obj == null) {
log.error(Util.getMessage("NoMethodHandlerIsRegisteredDiscardingRequest"));
return null;
}
if (req == null || req.getLength() == 0) {
log.error(Util.getMessage("MessageOrMessageBufferIsNull"));
return null;
}
Object body =
req_marshaller != null
? req_marshaller.objectFromBuffer(req.getRawBuffer(), req.getOffset(), req.getLength())
: req.getObject();
if (!(body instanceof MethodCall))
throw new IllegalArgumentException("message does not contain a MethodCall object");
MethodCall method_call = (MethodCall) body;
if (log.isTraceEnabled()) log.trace("[sender=%s], method_call: %s", req.getSrc(), method_call);
if (method_call.getMode() == MethodCall.ID) {
if (method_lookup == null)
throw new Exception(
String.format(
"MethodCall uses ID=%d, but method_lookup has not been set", method_call.getId()));
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);
}
/**
* 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;
}
}
/**
* 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 Buffer objectToBuffer(Object obj) throws Exception {
MethodCall call = (MethodCall) obj;
ByteBuffer buf;
switch (call.getId()) {
case START:
case GET_CONFIG:
buf = ByteBuffer.allocate(Global.BYTE_SIZE);
buf.put((byte) call.getId());
return new Buffer(buf.array());
case SET_OOB:
case SET_SYNC:
return new Buffer(booleanBuffer(call.getId(), (Boolean) call.getArgs()[0]));
case SET_NUM_MSGS:
case SET_NUM_THREADS:
case SET_MSG_SIZE:
case SET_ANYCAST_COUNT:
return new Buffer(intBuffer(call.getId(), (Integer) call.getArgs()[0]));
case GET:
return new Buffer(longBuffer(call.getId(), (Long) call.getArgs()[0]));
case PUT:
Long long_arg = (Long) call.getArgs()[0];
byte[] arg2 = (byte[]) call.getArgs()[1];
buf =
ByteBuffer.allocate(
Global.BYTE_SIZE + Global.INT_SIZE + Global.LONG_SIZE + arg2.length);
buf.put((byte) call.getId())
.putLong(long_arg)
.putInt(arg2.length)
.put(arg2, 0, arg2.length);
return new Buffer(buf.array());
case SET_READ_PERCENTAGE:
Double double_arg = (Double) call.getArgs()[0];
buf = ByteBuffer.allocate(Global.BYTE_SIZE + Global.DOUBLE_SIZE);
buf.put((byte) call.getId()).putDouble(double_arg);
return new Buffer(buf.array());
default:
throw new IllegalStateException("method " + call.getMethod() + " not known");
}
}