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| |
| This sample shows how to define a dynamic dependency from a Component's init method. |
| |
| Let's recap the lifecycle of a DM component: |
| |
| - the configuration (if any) is first injected (updated callback). |
| - then optional dependencies on class fields are injected. |
| - then all required dependencies are injected. |
| - then the init(Component c) method is invoked; And from there you are then able to add dynamic dependencies using any previously |
| injected services (either configuration injected in update method, or other injected services declared from the Activator). |
| - then the start callback is invoked when all required dependencies declared from the init method are injected. |
| |
| In this sample, the "DynamicDependency" Component defines in its "init" method a dynamic dependency on a Storage service. |
| But it first loads the "storage type" and "storage required" dependency informations from a Configuration PID |
| (see the "Dynamic Dependency Configuration" PID from webconsole), which is defined using Bnd MetaType Annotations. |
| |
| So, first, click on the "dynamicdep.api.bndrun" descriptor, and run it. |
| Then go to webconsole (http://localhost:8080/system/console/configMgr), and configure the "Dynamic Dependency Configuration" PID. |
| then just type "log warn" under the gogo shell: |
| |
| log warn |
| |
| Then you normally see something like: |
| |
| 2016.02.08 21:54:16 WARNING - Bundle: org.apache.felix.dependencymanager.samples.dynamicdep.api - MapDBStorage.store(gabu,zo) |
| 2016.02.08 21:54:16 WARNING - Bundle: org.apache.felix.dependencymanager.samples.dynamicdep.api - start |
| 2016.02.08 21:54:16 WARNING - Bundle: org.apache.felix.dependencymanager.samples.dynamicdep.api - init: storage type=mapdb, storageRequired=true |
