# How to check within a plugin mandatory plugins **URL:** \ **Category:** Elasticsearch\ **Created:** [August 10, 2012, 3:52pm UTC](https://discuss.elastic.co/t/how-to-check-within-a-plugin-mandatory-plugins/8706 "2012-08-10T15:52:47Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [August 10, 2012, 3:52pm UTC](https://discuss.elastic.co/t/how-to-check-within-a-plugin-mandatory-plugins/8706/1 "2012-08-10T15:52:47Z")
Heya, I would like to check if mandatory plugins for my own plugin are loaded. Is it possible? For example, I have the FSRiver which depends on mapper-attachment plugin. I'm thinking of verifying mapper attachment plugin when the river starts: [https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/river/fs/FsRiver.java#L83](https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/river/fs/FsRiver.java#L83) [https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/river/fs/FsRiver.java#L83](https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/river/fs/FsRiver.java#L83) Is it the best place to do it or is it better to do it when I register the plugin: [https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/plugin/river/fs/FsRiverPlugin.java#L45](https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/plugin/river/fs/FsRiverPlugin.java#L45) [https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/plugin/river/fs/FsRiverPlugin.java#L45](https://github.com/dadoonet/fsriver/blob/master/src/main/java/org/elasticsearch/plugin/river/fs/FsRiverPlugin.java#L45) And how can I check that in Java? Thanks for your advices. David. -- David Pilato [http://www.scrutmydocs.org/](http://www.scrutmydocs.org/) [http://dev.david.pilato.fr/](http://dev.david.pilato.fr/) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs ---
**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\ **Post date:** [August 12, 2012, 1:41pm UTC](https://discuss.elastic.co/t/how-to-check-within-a-plugin-mandatory-plugins/8706/2 "2012-08-12T13:41:16Z")
Hi David, On Fri, Aug 10, 2012 at 5:52 PM, David Pilato [david@pilato.fr](mailto:david@pilato.fr) wrote: > \*\* > > I would like to check if mandatory plugins for my own plugin are loaded. > > Is it possible? And how can I check that in Java? > If you get access to the node during river startup, you could do it via guice injector access I guess MyClass instanceOfClazz = ((InternalNode) node).injector().getInstance(MyClass.class); --Alexander -- ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [August 12, 2012, 2:02pm UTC](https://discuss.elastic.co/t/how-to-check-within-a-plugin-mandatory-plugins/8706/3 "2012-08-12T14:02:59Z")
Thanks Alexander. I will try it and give a feedback. Cheers. David 😉 Twitter : @dadoonet / @elasticsearchfr Le 12 août 2012 à 15:41, Alexander Reelsen [alr@spinscale.de](mailto:alr@spinscale.de) a écrit : > Hi David, > > On Fri, Aug 10, 2012 at 5:52 PM, David Pilato [david@pilato.fr](mailto:david@pilato.fr) wrote: > I would like to check if mandatory plugins for my own plugin are loaded. > Is it possible? > > And how can I check that in Java? > If you get access to the node during river startup, you could do it via guice injector access I guess > > MyClass instanceOfClazz = ((InternalNode) node).injector().getInstance(MyClass.class); > > ## --Alexander -- ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:16am UTC](https://discuss.elastic.co/t/how-to-check-within-a-plugin-mandatory-plugins/8706/4 "2017-07-06T03:16:39Z")