The package ftplet is the basic API required to add
custom user specified ftplets. The server needs
slightly modified version of these APIs. Ftplet API is
somewhat fixed but server API may get changed in
future. This is the reason behind this difference. The
following two hierarchy will clarify this.
FtpConfig <- IFtpConfig <- FtpConfigImpl
FtpStatistics <- IFtpStatistics <- FtpStatisticsImpl
OK, if we're keen about Dependency Injection, we'd need to change a
lot. The basic FtpConfig component should have little knowledge of
UserManager (and others), and no coupling to it...
class XStreamFtpConfig implements FtpConfig { }
class FooUserManager implements UserManager {
FooUserManager( FtpConfig c ) {
// whatever
}
}
class SomethingComponentThatRequiresUserManager {
SomethingComponentThatRequiresUserManager( UserManager um ) {
// whatever
}
}
Also, for the record, a reusable component should not make a logging
framework choice :-)
Better would be a Monitor and an adapter to one of a number of
Logging Framework implementations.
- Paul
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