multiple hosts for JNDI providers

mobetter Jun 21, 2005 6:57 PM

Folks,

Am in a position where our jms client (when instantiating the message broker) NEEDS to connect to one host (where the JBOSS mq queue is listening) and if that does not respond try and connect to another host where a similar JBOSS mq queue is listening.

Here is our properties file:
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=jnp://localhost:1099
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces

Currently, we try and connect to JMS on the localhost. This needs to change to accomodate for multiple hosts (two at the moment).

Do i just add the host to the "java.naming.provider.url" property like the example below:

"java.naming.provider.url=jnp://host1:1099 jnp://host2:1099"

Any ideas ...

Appreciate it much ...

Mo.

1. Re: multiple hosts for JNDI providers

genman Jun 22, 2005 5:02 PM (in response to mobetter)

I think you can only have one URL in there at a time. You'll have to write the logic yourself to fail over to the alternative URL if the first one fails.
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2. Re: multiple hosts for JNDI providers

starksm64 Jun 24, 2005 8:03 PM (in response to mobetter)

Comma seperated hosts/urls in the Context.PROVIDER_URL are supported.

public class TestJNDI
{
 public static void main(String[] args) throws Exception
 {
 Properties env = new Properties();
 env.setProperty(Context.INITIAL_CONTEXT_FACTORY,
 "org.jnp.interfaces.NamingContextFactory");
 env.setProperty(Context.URL_PKG_PREFIXES,
 "org.jboss.naming:org.jnp.interfaces");
 env.setProperty(Context.PROVIDER_URL, "jnp://badhost:1099,jnp://localhost:1099");
 InitialContext ctx = new InitialContext(env);
 Object root = ctx.lookup("");
 System.out.println(root);
 }
}

3. Re: multiple hosts for JNDI providers

mobetter Jun 29, 2005 2:30 AM (in response to mobetter)

thanks for the info ... will try it out ...
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