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Merge pull request #1941 from guobingkun/custom_extension 

add doc for bundling custom extensions with other Druid extensions
This commit is contained in:
Fangjin Yang 2015-11-09 11:32:33 -08:00
parent 7816d67148 b24eccfb9e
commit 78b42c1087
1 changed files with 11 additions and 0 deletions
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docs/content/development/modules.md
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@ -16,6 +16,7 @@ Druid's extensions leverage Guice in order to add things at runtime. Basically,
1. Add Complex metrics
1. Add new Query types
1. Add new Jersey resources
1. Bundle your extension with all the other Druid extensions
Extensions are added to the system via an implementation of `io.druid.initialization.DruidModule`.
@ -227,3 +228,13 @@ Adding new Jersey resources to a module requires calling the following code to b
```java
Jerseys.addResource(binder, NewResource.class);
```
### Bundle your extension with all the other Druid extensions
When you do `mvn install`, Druid extensions will be packaged within the Druid tarball and `extensions` directory, which are both underneath `distribution/target/`.
If you want your extension to be included, you can add your extension's maven coordinate as an argument at
[distribution/pom.xml](https://github.com/druid-io/druid/blob/master/distribution/pom.xml#L95)
During `mvn install`, maven will install your extension to the local maven repository, and then call [pull-deps](../operations/pull-deps.html) to pull your extension from
there. In the end, you should see your extension underneath `distribution/target/extensions` and within Druid tarball.