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| <h1 id="configuration-admin">Configuration Admin</h1> |
| <hr> |
| <h2 id="introduction">Introduction</h2> |
| <p>The configuration Admin service allows defining and deploying configuration data to bundles. |
| When compared to config.properties it adds the option to update configuration data by providing a persistent storage. It also allows changing configuration data at run-time.</p> |
| <hr> |
| <h2 id="design">Design</h2> |
| <p>The config_admin bundle implements the configuration_admin service, the interface to configuration objects and the interface of a managed service. At the moment, the implementation uses a config_admin_factory to generate config_admin services for each bundle that wants to use this service. This is an inheritance of the original design and not needed. |
| The configuration data is stored persistently in a subdirectory store of the current bundle directory. |
| The filenames have the name of the PID and have an extension pid, e.g. base.device1.pid |
| The files contains a list of key/value pairs. At least the following keys need to be present: |
| service.bundleLocation |
| service.pid</p> |
| <hr> |
| <h2 id="todo">TODO</h2> |
| <ol> |
| <li>Test the configuration of a service_factory</li> |
| <li>Think about the option to allow remote update of the managed_services</li> |
| <li>Support configuration of multiple managed services with the same PID. At the moment, only one service is bound to a configuration object. |
| To support this the getConfiguration2 function needs to be called with a location NULL according to the spec.</li> |
| </ol> |
| <hr> |
| <h2 id="usage">Usage</h2> |
| <ol> |
| <li>Bundle that needs configuration data |
| This bundle has to register next to its normal service a managed service that has an update method. This managed service needs to be registered with a properties object that contains the key/value pair service.pid=<PID NAME>. |
| Use config_admin_tst/example_test as an example (it is better than example_test2)</li> |
| <li>Bundle/application that wants to update the configuration data of the system |
| This bundle needs to retrieve the running config_admin service. With this service it can retrieve all configuration objects for all known Persistent Identifiers (PIDs). For each PID, get all properties that need to be updated. See config_admin_test for an example.</li> |
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