Servis-Rhino 4211B Guia do Utilizador descarregar pdf (Página 78)

This shows a dialog in which the procedure name and parameters may be supplied.

Clicking the Run button shows us the results of invoking the adapter on the Worklight Server:

JMS Adapter

The JMS adapter allows a Worklight client to send or receive messages from a Java Message

Service (JMS) queening provider. The JMS adapter encapsulates all access to the JMS system so

that the client developer need only invoke the adapter without having to have knowledge of the

underlying mechanics of JMS access.

Before we dive deeper into the adapter, let us first review our understanding of JMS. JMS provides

an abstraction to Java programmers who wish to access queuing systems. A variety of vendors

provide queuing systems each of which are different. This would mean that a Java programmer

wishing to use one would be bound to that JMS provider. The JMS specification describes a vendor

neutral set of interfaces that a Java programmer can use. In order for a Java application to be able

to access the JMS provider, it needs two pieces of information. The first is called the JMS

Connection Factory definition. This is a JNDI entry that points to a JMS provider supplied

configuration for accessing that JMS provider. The second definition is the identity of a JMS queue

to which messages will be read or written. This is again defined through a JNDI definition.

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Servis-Rhino 4211B Guia do Utilizador Página 78