/**
* Sends a unicast message and - depending on the options - returns a result
*
* @param msg the message to be sent. The destination needs to be non-null
* @param opts the options to be used
* @return T the result
* @throws Exception If there was problem sending the request, processing it at the receiver, or
* processing it at the sender.
* @throws TimeoutException If the call didn't succeed within the timeout defined in options (if
* set)
*/
public <T> T sendMessage(Message msg, RequestOptions opts) throws Exception {
Address dest = msg.getDest();
if (dest == null)
throw new IllegalArgumentException("message destination is null, cannot send message");
if (opts != null) {
msg.setFlag(opts.getFlags()).setTransientFlag(opts.getTransientFlags());
if (opts.getScope() > 0) msg.setScope(opts.getScope());
if (opts.getMode() == ResponseMode.GET_NONE) async_unicasts.incrementAndGet();
else sync_unicasts.incrementAndGet();
}
UnicastRequest<T> req = new UnicastRequest<T>(msg, corr, dest, opts);
req.execute();
if (opts != null && opts.getMode() == ResponseMode.GET_NONE) return null;
Rsp<T> rsp = req.getResult();
if (rsp.wasSuspected()) throw new SuspectedException(dest);
Throwable exception = rsp.getException();
if (exception != null) {
if (exception instanceof Error) throw (Error) exception;
else if (exception instanceof RuntimeException) throw (RuntimeException) exception;
else if (exception instanceof Exception) throw (Exception) exception;
else throw new RuntimeException(exception);
}
if (rsp.wasUnreachable()) throw new UnreachableException(dest);
if (!rsp.wasReceived() && !req.responseReceived())
throw new TimeoutException("timeout sending message to " + dest);
return rsp.getValue();
}
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;
}
/**
* Sends a unicast message to the target defined by msg.getDest() and returns a future
*
* @param msg The unicast message to be sent. msg.getDest() must not be null
* @param options
* @param listener A FutureListener which will be registered (if non null) with the future
* <em>before</em> the call is invoked
* @return NotifyingFuture<T> A future from which the result can be fetched
* @throws Exception If there was problem sending the request, processing it at the receiver, or
* processing it at the sender. {@link java.util.concurrent.Future#get()} will throw this
* exception
* @throws TimeoutException If the call didn't succeed within the timeout defined in options (if
* set)
*/
public <T> NotifyingFuture<T> sendMessageWithFuture(
Message msg, RequestOptions options, FutureListener<T> listener) throws Exception {
Address dest = msg.getDest();
if (dest == null)
throw new IllegalArgumentException("message destination is null, cannot send message");
if (options != null) {
msg.setFlag(options.getFlags()).setTransientFlag(options.getTransientFlags());
if (options.getScope() > 0) msg.setScope(options.getScope());
if (options.getMode() == ResponseMode.GET_NONE) async_unicasts.incrementAndGet();
else sync_unicasts.incrementAndGet();
}
UnicastRequest<T> req = new UnicastRequest<T>(msg, corr, dest, options);
if (listener != null) req.setListener(listener);
req.setBlockForResults(false);
req.execute();
if (options != null && options.getMode() == ResponseMode.GET_NONE)
return new NullFuture<T>(null);
return req;
}
protected <T> GroupRequest<T> cast(
final Collection<Address> dests,
Message msg,
RequestOptions options,
boolean block_for_results,
FutureListener<RspList<T>> listener)
throws Exception {
if (msg.getDest() != null && !(msg.getDest() instanceof AnycastAddress))
throw new IllegalArgumentException("message destination is non-null, cannot send message");
if (options != null) {
msg.setFlag(options.getFlags()).setTransientFlag(options.getTransientFlags());
if (options.getScope() > 0) msg.setScope(options.getScope());
}
List<Address> real_dests;
// we need to clone because we don't want to modify the original
if (dests != null) {
real_dests = new ArrayList<Address>();
for (Address dest : dests) {
if (dest instanceof SiteAddress || this.members.contains(dest)) {
if (!real_dests.contains(dest)) real_dests.add(dest);
}
}
} else real_dests = new ArrayList<Address>(members);
// if local delivery is off, then we should not wait for the message from the local member.
// therefore remove it from the membership
Channel tmp = channel;
if ((tmp != null && tmp.getDiscardOwnMessages())
|| msg.isTransientFlagSet(Message.TransientFlag.DONT_LOOPBACK)) {
if (local_addr == null) local_addr = tmp != null ? tmp.getAddress() : null;
if (local_addr != null) real_dests.remove(local_addr);
}
if (options != null && options.hasExclusionList()) {
Address[] exclusion_list = options.exclusionList();
for (Address excluding : exclusion_list) real_dests.remove(excluding);
}
// don't even send the message if the destination list is empty
if (log.isTraceEnabled()) log.trace("real_dests=" + real_dests);
if (real_dests.isEmpty()) {
if (log.isTraceEnabled()) log.trace("destination list is empty, won't send message");
return null;
}
if (options != null) {
boolean async = options.getMode() == ResponseMode.GET_NONE;
if (options.getAnycasting()) {
if (async) async_anycasts.incrementAndGet();
else sync_anycasts.incrementAndGet();
} else {
if (async) async_multicasts.incrementAndGet();
else sync_multicasts.incrementAndGet();
}
}
GroupRequest<T> req = new GroupRequest<T>(msg, corr, real_dests, options);
if (listener != null) req.setListener(listener);
if (options != null) {
req.setResponseFilter(options.getRspFilter());
req.setAnycasting(options.getAnycasting());
}
req.setBlockForResults(block_for_results);
req.execute();
return req;
}