camel in spring, configuring routes at deployment-time

[guest]

I've assembled some routes in a spring bean and I've come to a situation where id like to turn 'on' a route or turn 'off' a route during deployment time.  Maybe I can use some properties file that can configure this.  What would be the best way to do this?

[davsclaus]

You can use the Camel properties component

http://camel.apache.org/properties

And then there is the {{autoStartup}} attribute on the {{}} tag which you can use to set as either true or false.

I think there was a mistake in Camel 2.3/2.4 that the {{autoStartup}} attribute was forced to be a xs:boolean type and hence didnt support the properties. This has been fixed in 2.5 which is to be released in this month.

[davsclaus]

You can then just set all routes to autoStartup=false and then enable them from Java code. There is a startRoute on the CamelContext you can use.

See also Camel in action, chapter 13.

[donaldesb]

Hi Dav,

I had tried using properties placeholder in my camel-context.xml route

The content of myprop.properties is:

cool.start=file:/esb/camellos/eat/?fileName=singtel.$

But after changing the value in the myprop.properties config file, servicemix is still using the previous cached value.

I need to restart servicemix in order for servicemix to pick up the new value from the myprop.properties config file.

But the value in ?fileName ${} placeholder can be immediately retrieved from another updated config file without restarting servicemix.

Is there a way for servicemix to read an updated   value without restarting servicemix?

[davsclaus]

If you are using SMX 4.x then you need some OSGi stuff to have it be able to auto update .properties files on the fly.

[davsclaus]

I managed to find some documentation about using properties file with OSGi config

http://fusesource.com/docs/esb/4.2/deploy_osgi/DeployCamel-Packaging.html

[donaldesb]

Hi Dav,

I had tried the camel-osgi example. After "mvn clean install", I copied the

camel-osgi-4.2.0-fuse-02-00.jar

into    /esb/apache-servicemix-4.2.0-fuse-02-00/deploy

then I modified the content in    org.apache.servicemix.examples.cfg

to     prefix=YourTransform ( . . . test . . .)

But servicemix did not pick up the new value.

After typing     osgi:update (bundle id)    at linux command, then servicemix start reading the new value in the config file.

Is that the normal behaviour or am i missing something?

Regards.

Edited by: donaldesb on Nov 12, 2010 6:41 AM

[ffang]

Hi,

Yeah, you need update or restart the bundle to pick up the new property value.

Freeman

[njiang]

Current camel doesn't support to load the properties after the route is started,  so if you change the properties you need to load the bundle again to pick up that change.

Willem