[jira] Commented: (AMQNET-271) Add support for a Message Transformer to be set in NMS API

["Jim Gomes (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/activemq/browse/AMQNET-271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=61187#action_61187 ] 

Jim Gomes commented on AMQNET-271:
----------------------------------

Instead of a callback interface style of programming, wouldn't it be more .NET-like to use an event driven architecture?  For example:

The IMessageProducer interface would support a PreSendMessageEvent that could be used to register an event handler for processing the message.  Likewise, the IMessageConsumer interface would support a PreDispatchMessageEvent event.  This would make implementations cleaner and simpler, by creating a separation of concerns.  The implementor would not be forced to implement both transforms, since they could create event handlers individually in case they only want to handle pre-dispatch events and don't care about pre-send events.

Just trying to understand this feature a bit more.

> Add support for a Message Transformer to be set in NMS API
> ----------------------------------------------------------
>
>                 Key: AMQNET-271
>                 URL: https://issues.apache.org/activemq/browse/AMQNET-271
>             Project: ActiveMQ .Net
>          Issue Type: Improvement
>          Components: ActiveMQ, EMS, MSMQ, NMS, Stomp
>    Affects Versions: 1.3.0
>            Reporter: Timothy Bish
>            Assignee: Timothy Bish
>            Priority: Minor
>             Fix For: 1.4.0
>
>
> Add support in the NMS API for users to set an custom MessageTransformer on the NMS object: 
> IConnectionFactory
> IConnection
> ISession
> IMessageProducer
> IMessageConsumer
> The transformer would be an instance of IMessageTransformer which provides two methods:
> {noformat}
>     /// <summary>
>     /// Interface for a class that can Transform a Message from one type to another either
>     /// before consumption or before sent by a producer.
>     /// </summary>
>     public interface IMessageTransformer
>     {
>         /// <summary>
>         /// Called from an IMessageProducer prior to sending the IMessage, allows the client
>         /// to perform a transformation on the Message prior to it being sent.  This allows a
>         /// client to configure a single Producer to convert a Message to a format that can be
>         /// processed by a specific receiving client.
>         /// </summary>
>         IMessage ProducerTransform(ISession session, IMessageProducer producer, IMessage message);
>         /// <summary>
>         /// Called from an IMessageConsumer prior to dispatching the message to the client either
>         /// by the 'Receive' methods or from the async listener event.  Allows the client to perform
>         /// message pre-processing before some messages are dispatched into the client code.
>         /// </summary>
>         IMessage ConsumerTransform(ISession session, IMessageConsumer producer, IMessage message);
>     }
> {noformat}

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.