jbi

Such a request-response messaging pattern is also allowed in JBI and referred to as in-out.

The rest of this series is all about using JBI and configuring ServiceMix to build an HSB.

Two years after it was released, the number of ESB implementations that do not use JBI outweighs the number that do.

Integration was the initial idea behind the spawning of JBI, but it will prove to be useful in other situations.

This File Binding Component configuration provides a JBI service with the name esb: mail-service and has an endpoint with the name sender.

There were few people interested in deploying to SCA, but it was "on the radar" as something they may need in conjunction with JBI.

Step 3: The BC transforms the service invocation request into a normalized format defined by the JBI specification.

This example implements a provider, which can be accessed from other JBI services by sending a JIB message to this service endpoint.

Step 9: The BC connected with the first JBI environment transforms the service invocation request into a normalized message.

This allows atomic actions to be performed as part of a JBI Exchange.

This example is a blending of the first two examples with an additional JBI instance containing a non-replicated service.

On a higher level, Swordfish is using a subset of the JBI standard for messaging abstraction and message routing between components.

When you're working with Petals, you don't configure the Service Unit in an xbean. xml file, you configure it in a jbi. xml file.

The JBI specification provides a detailed XML schema for defining the behavior of all BCs and SEs that you wish to host on JBI.

To implement components of the JBI environment, ServiceMix uses the popular open source Spring framework (see Resources).

All you need to do is to configure an external service provider and a consumer in the first JBI server.

Now you'll assemble the service units into a JBI service assembly.

BCs provide connectivity to services consumers and providers external to a JBI environment.

Whenever you want to integrate a service into JBI, you need a JBI component, whether the service is WSDL-based or industry-specific.

Plus, IBM and BEA were not involved in the specification because they did not believe it was needed.

In the JBI-based implementation services do not interact with each other directly.

This version is not yet released at the moment of writing, so we will use a Mail JBI component provided b y another JBI implementation.

These enhancements do allow a JBI management operation to target a specific instance or a set of instances, or all instances.

It includes reference implementation model and interfaces, which JBI-compliant products or an in-house JBI solution must implement.

The anchor construct in JBI is the service container object, which supports plug-ins communicating through message routers.

This means you can simply use the configuration of the Radiology Department application as the second JBI server.

The runtime consists of a light weight JBI core, and several components.

Write the JBI configurations for the service provider (that is the Radiology Department application) as well as the service consumer.

The JBI specification has a standard interface named javax. jbi. component. Component, which all BCs should implement.

Oh and I'll point out again that JBI and SCA are not in conflict.

In addition to standardized service definitions JBI uses the notion of "normalized" messages supporting global components interoperability.

JBI is based around a messaging paradigm that makes routing and processing decisions on normalized messages at runtime.

These two elements are described in the JBI specification, but don't allow service specific configuration.

Figure 4 shows a service consumer and an external service provider connected to one JBI server.

Configuring an external service provider simply means telling the first JBI server that the second is a web service.

JBI provides all the features of an ESB that I have discussed, so I'll use it to build an HSB.

In this example we'll be using a JBI component provided by the Petals project, which we already discussed in chapter 1.

In this example we specified the service and endpoint names for the File sender JBI service.

Step 10: The BC connected with the first JBI environment hands over the normalized message to the NMR.

SJ: JBI is engine-to-engine, SCA wraps up the code in the engines.

JBI can be used as the infrastructure for creating runtimes that can deploy and execute applications described using SCA composites.

Step 8: The second JBI environment receives the request and forwards it to the BC connected with the first JBI environment.

I'll show you how to use Apache ServiceMix, a popular open source implementation of JBI, as an HSB.

JBI has both architectural and educational value.

This means the two JBI environments connect to each other through appropriate BCs.

Howe ver, Petals use the standard extension mechanism which is described in the JBI specification.

The JBI specification uses WSDL 2. 0 to define the interface of services exposed by internal and external service providers.

Step 5: The NMR forwards the normalized message to the BC connected with the second JBI environment.

A downside of ServiceMix is the learning curve to get into JBI.

JBI works on the idea of normalized message routing.

Then along comes SCA with what some perceive as overlap in the JBI JEE space and many people are already nailing the coffin shut on JBI.

You can see that the JBI assembly file of Listing 9 is very similar to Listing 6.

Part 2 of this series will give you practical steps for building an HL7-based BC and integrating HL7 into JBI.

But for the moment, there's more to learn about JBI.

What are your future plans with regards to JBI?

I won't discuss the entire JBI schema in this article.

This network address exists on the second JBI server.

Internal services in JBI are hosted as SEs.

This situation is similar to Figure 7 from Part 1, where I discuss the interconnection of JBI servers.

Some vendors even announce that they are dropping JBI because of lack of applicability.

If you are running the second JBI server from a different address, you must make the appropriate changes in these two places.

Step 6: The BC connected with the second JBI environment denormalizes the message.

service: Name of the radiology service provider that is hosted on the second JBI server.

This second part demonstrates how to configure these services so that a JBI server can start acting as an HSB.

The request will go to the first JBI server, travel through its consumer BC, NMR, provider BC, and then to the second JBI server.

When I tried this JBI interconnection, my second JBI server was running on a machine whose local network address was 192. 168. 10. 33.

Part 2 will demonstrate the use of more JBI schema tags.

InfoQ: Do you see any overlap between SCA and JBI?

I'll focus here on one important JBI tag called .

If you have the HL7 BC, you can integrate any HL7 service into JBI, thereby forming an HSB.

You have seen how to use JBI's tag to configure your BCs and SEs.

Configuring an external service provider for the first JBI server

To create the service assembly, you just need to write a JBI XML configuration, as shown in Listing 6

To run the first JBI server, perform these steps

Testing the interconnection of JBI servers

This sequence of events reveals two simple points about JBI

Mixing internal and external services in JBI

JBI container hosts two distinct types of plug-in components 9