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At line 41 changed 1 line.
* Of course, the handlers can be managed in the configuration handler, which includes adding, removing and reordering handlers. It should be pretty intuitive...
* Of course, the handlers can be managed in the configuration editor, which includes adding, removing and ordering handlers. It should be pretty intuitive...
At line 50 changed 1 line.
Do note that handlers for a giving endpoint will be executed on the request and response processing path. JAX-WS offers message context properties to allow the implementation to selectively choose which path the handler should be applied to, if that is desired.
Do note that handlers for a giving endpoint will be executed on the request and response processing path. JAX-WS offers message context properties to allow the user\\
implementation to selectively choose which path the handler should be applied to, if that is desired.
At line 52 changed 1 line.
Sometimes, handlers can be as simple as logging/tracking the message payload. Below is your typical "HelloWorld" kind of sample.\\
Sometimes, handlers can be as simple as logging/tracking the message payload. Below is your typical "Hello World" kind of sample.\\
At line 55 removed 57 lines.
So as promised, we have a simple example of how to use handlers with OpenESB. Here we have our famous Synchronous sample, and we are going to add a couple of handlers on\\
the "provider" endpoint to log the SOAP messages.\\
We have three
!! Using JAX-WS handlers with HTTP Binding Component
! Overview
* What is JAX-WS handler
In JAX-WS, there is the concept of ''__handlers__'' which are really interceptors to inject application logic to alter the protocol or payload messages before and/or after service\\
invocations. These are application level implementations which can be invoked at strategic places to extend the message processing capabilities.\\
[Check this out |https://jax-ws.dev.java.net/articles/handlers_introduction.html] for more elaborate overviews of the JAX-WS handlers.
! How to enable JAX-WS handlers in OpenESB
In OpenESB, we allow user handler implementations to be plugged into JAX-WS runtime through HTTP BC. A few things worth mentioning are:
** Handler implementation can be implemented in Java SE project(s) or any other standalone environment, i.e. handler implementation(s) can also be compiled outside of the IDE.
** Handler is an user implemented class with the only requirement of implementing the well-defined JAX-WS handler interface (SOAPHandler, LogicalHandler, and the optimized version of the SOAPHandler called MessageHandler)
** Handler implementation and configuration does not affect the application composition, i.e. building a BPEL process which adds a webservice request message\\
handler to tweak the SOAP headers before invoking a remote service should/would not affect the BPEL logic.
** Handler configuration, i.e. the particular handler class to invoke, will be done on the SOAP binding in CASA editor
\\
! How to configure JAX-WS handlers in OpenESB
** As mentioned earlier, handlers can be configured on the SOAP binding in CASA. Since it is a port (endpoint) level configuration, the handler configuration is enabled on the SOAP\\ endpoint icon (i.e. the "greenish" and the "pupleish" arrows), as shown in the screen shot below:
\\
[{Image src='SOAPEndpointConfigEditor.png' width='' height='' align='left|center|right' }]
\\
** Clicking on the "..." button in the endpoint property sheet for "Handlers" will bring up the handler configuration editor:
\\
[{Image src='HandlerConfigEditor.png' width='' height='' align='left|center|right' }]
\\
** Clicking on the "Add" button will bring up a file chooser window. From here, user can browse to a NetBeans Java SE project, or a file directory containing the jar file(s) for\\ the handler implementation and any dependency libraries, or a single jar file containing all the handler(s) and dependency classes.\\ CASA introspects the selected project folder or the jar file(s) and populates the "Handler Chain" list with all the JAX-WS handlers found.\\ Detail of the selected handler is\\displayed in the "Handler Details" section.
\\
[{Image src='HandlerConfiguration.png' width='' height='' align='left|center|right' }]
\\
** Of course, the handlers can be managed in the configuration handler, which includes adding, removing and reordering handlers. It should be pretty intuitive...
! How does the handler work (in OpenESB)
Handlers can be defined to access and/or modify incoming or outgoing SOAP messages. There can be any number of handlers, and/or any combination of the legitimate handler types defined for a SOAP endpoint.\\
When there are mixed handler types defined for a given endpoint, the execution order will depend on the directionality of the message: all logical handlers will be executed \\
before the SOAP handlers on outgoing (request and/or response) messages, and SOAP handlers will be executed before logical handlers on incoming (request and response) messages.\\
When there are multiple handlers defined for the same type/group, the handlers will be executed in the order they are defined in the CASA editor.\\
Do note that handlers for a giving endpoint will be executed on the request and response processing path. JAX-WS offers message context properties to allow the implementation to selectively choose which path the handler should be applied to, if that is desired.
Sometimes, handlers can be as simple as logging/tracking the message payload. Below is your typical "HelloWorld" kind of sample.\\
! A sample
At line 118 changed 1 line.
All three projects are included here in the Handler_Sample.zip.
All three projects are included here in the [Handler_Sample.zip | Handler_Sample.zip].
G'day, Anonymous Guest

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This page (revision-18) was last changed on 14-Sep-09 17:49 PM, -0700 by Sherry Weng