> are watchdog and watchdog target complete set of abstractions ?
Watchdog publishes start, stop and reset. Triggering is defered to Watchdog
subtypes. WatchdogTarget is the trigger type defined to work with a subset
of Watchdog subtypes.
> To me this means there is another association API. Can you post that API
> please. How will you lookup and associate a watchdog with target?
Here is the Watchdog and Adapter for the SMTPHandler:
TimeoutWatchdog theWatchdog =
new TimeoutWatchdog(timeout,
new WatchdogTarget() {
public void execute() {
SMTPHandler.this.getLogger().error("...");
try {
SMTPHandler.this.socket.close();
} catch (Exception e) {
// ignored
}
}
});
There is no lookup. The target is part of the instance data for the
Watchdog object. There is no exposed "manager" class; the client code deals
directly with the Watchdog object, which can delegate behavior to other
objects, or implement it directly. But that is not exposed by the
interface.
I have not seen the addition, but I understand that Peter has made a
Watchdog Factory providing the same capability, except that it allows the
implementation of the Watchdog to be defered, so that either the dual-thread
or shared-thread implementation can be used.
--- Noel
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