9.4. Using Permissions in Your Service
In this section, we return to the unfinished design of the parameter service (ParameterService) from Chapter 4 and see how permissions can be used in this service.
9.4.1. Checking Permissions
Recall that the parameter service allows other bundles to access their parameter settings and handles the task of persistently saving them to and restoring them from a file. Because we used the service factory technique, each bundle can read, create, or modify its own parameters. However, oftentimes an administrative bundle may want to configure the parameters on behalf of another bundle. For instance, the administrative bundle can set the sender, recipient, and mail host parameters for the mailer example, or the printer ...
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