April 2012
Beginner
96 pages
2h 26m
English
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Routers
One of the flow requirements is to send the messages to one or more
channels based on certain criteria. A router component can be used to
distribute the messages to multiple destinations. For example, the
requirement is that all new Trades should be sent to new-trades-in-channel while all amended Trades
are sent to amended-trades-in-channel.
The Router component will take care of
this task. The router picks up the message from a channel and redelivers
(routes) it to the relevant channel based on payload or
headers content.
There is a difference between the filters and routers. While Filter decides whether or not the message is to be sent based on a simple Boolean test, Router forwards the message to one or more channels based on content. There are only two options for a message that’s being passed through a Filter—forwarded or discarded. If a filter is used, a message may or may not appear in an output channel, whereas if a router is used, a single message can be sent to one or more channels.
The framework provides a couple of built-in routers: PayloadTypeRouter, based on
payload content, or HeaderValueRouter, based on
header values.
PayloadTypeRouter
The PayloadTypeRouter
determines the routing of messages to different channels based on the
type of the payload. The router
endpoint attached to an incoming channel will evaluate the type and
accordingly distribute (route) the messages to other channels expecting
that particular type. The payload-type-router element is used to ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.