Chathura has written some load-balancing code for Synapse, but it seems like the current model for endpoints needs a little refactoring to sit well with it.
Currently an endpoint is "just" one endpoint. In the config language (http://ws.apache.org/synapse/Synapse_Configuration_Language.html) it says you can have several endpoints in a <send>..</send> but we've never implemented that. If we did it that way, then you couldn't use the load-balancing with a proxy without defining a sequence, because the proxy just takes a single endpoint reference. So it seems it makes more sense to have the <endpoint> tag refer to a "logical" endpoint. A logical endpoint could be defined in lots of ways. For example, it could actually be a load-balancing group, or a failover pair. So here is a potential syntax: <endpoint name="string"> ( <address uri="http://"; [format="soap|soap11|soap12|pox"]> <enableRM policy=" "/>? <enableSec [policy="key"]/>? <enableAddressing/>? .. extensibility .. </address> | <wsdl [uri="http://..";] [service="qname"] [port/endpoint="qname"]> <wsdl:definition>...</wsdl:definition>? <wsdl20:description>...</wsdl20:description>? <enableRM policy=" "/>? <enableSec [policy="key"]/>? <enableAddressing/>? .. extensibility .. </wsdl> | <loadbalance policy="round-robin"> <endpoint ../>+ </loadbalance> | <failover policy="exponential-retry"> <endpoint ../>+ </failover> | .. extensibility .. ) </endpoint> So in this model, we can define an endpoint as either an address, or using a WSDL, or as a load-balance group, or failover group. There could be other types (maybe using MEX?). Chathura has some cool implementation thoughts to go with this, which I hope he will send as well (hint, hint). Paul -- Paul Fremantle VP/Technology, WSO2 and OASIS WS-RX TC Co-chair http://bloglines.com/blog/paulfremantle [EMAIL PROTECTED] "Oxygenating the Web Service Platform", www.wso2.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
