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Re: [xmlblaster] Newbie question: xlmblaster and php: how to get updates?

Eduard Martinez wrote:

I'm trying to implement an application wich sends messages asynchrolously
betwen a java application an several php clients. I took a look to the php
demo, but I can't figure how to suscribe on a topic and specify something to
get updates when there is a new message of the topic, like the java client.
Is it possible? How can I do it?


Salute Edu,

i don't think that Cyrilles XmlRpc demo supports callbacks.

So you need to make your own implementation,
here are three approaches you could try:

1. Extend Cyrilles XmlRpc example with a XmlRpc-callback server,
there are many such implementations, see

2. Access our xmlBlaster C library from PHP.
Like this you have tunneled callbacks, high performance, zlib compression
See http://www.xmlblaster.org/xmlBlaster/doc/requirements/client.c.socket.html
and see how our C# example is doing this:

3. You can use Cyrilles XmlRpc PHP code and use blocking get() calls (with timeouts):
You would subscribe with PHP but the clients callback queue has set dispatcherActive=false
so the messages are collected on server side. Now you can use synchronous get()
calls which block until messages are available
(see xmlBlaster/src/java/org/xmlBlaster/client/XmlBlasterAccess.java:receive() as a
code sample to use for PHP).
This approach is very simple but you need to use a dedicated thread in PHP for the blocking get() call
(see also http://www.xmlblaster.org/xmlBlaster/doc/requirements/engine.qos.queryspec.QueueQuery.html)