How to see a Java Blueprint in Apache Brooklyn

Question

I followed the steps of the following example:

https://brooklyn.incubator.apache.org/v/0.7.0-SNAPSHOT/java/archetype.html

And now I have my jar into the /target directory (I assume that this is the java blueprint).

What I want is to see that blueprint in the apache brooklyn server, but I can not see nothing.

I copied the generated jar in lib/brooklyn and in lib/dropins but without success when I start the server. I can not see nothing when I start the server.

Am I missing something? Could it be some problem with versions? The generation on the jar was made with the Milestone 1 and the apache brooklyn is the 0.7.0-Snapshot of May

Answer 1

Presence of the jar in lib/dropins makes your blueprint usable via YAML blueprints or via other Java blueprints.

For example if your Java blueprint is called com.acme.brooklyn.MyBlueprint, then you could launch a YAML app such as:

location: localhost
services:
- type: com.acme.brooklyn.MyBlueprint

If you want your blueprint to be listed in the catalog (i.e. be discoverable), you have a few options (in latest 0.7.0-snaphshot):

• You can post to the REST api to add it (see https://brooklyn.incubator.apache.org/v/latest/ops/catalog/index.html)
• You can add to the catalog via the CLI (see "CLI Options" in https://github.com/apache/incubator-brooklyn/blob/master/docs/guide/ops/catalog/index.md)
• You can configure Brooklyn to do classpath scanning, to find all annotated blueprints (see use of scanJavaAnnotations, in the above link)

You could also consider building your code as an OSGi bundle, rather than putting it in lib/dropins. The advantage of using OSGi is that you can have versioned Java blueprints, updating the code for different versions.