Hi J-F,
On 6/29/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Quoting peter royal <[EMAIL PROTECTED]>:
> On Jun 29, 2006, at 11:02 AM, [EMAIL PROTECTED] wrote:
>> I face the current situation:
>>
>> 1) a device connects to my server and sends a first message to
>> initiate a logical session
>> 2) the server replies
>> 3) the device now listens on the port
>> 4) the server sends some requests (and waits for replies)
>> 5) when it has finished, the server sends a final message to close
>> logical session
>> 6) the device replies and closes connection
>>
>> I thought that I could use a filter to handle message exchanges of
>> 1), 2), 5) and 6). A separate handler would deal with exhanges in
>> 4).
>>
>> The filter would completely hide logical session handling. This means
that
>>
>> a) the handler would receive a sessionOpened() when filter has
>> completed point 2).
>> b) a call to close() by the handler would initiate 5)
>>
>> I have implemented it, but when I write a message in my filter, the
>> messageSent is never called.
>>
>> Where am I wrong?
I now have problem when filtering 'close'.
In filterClose, I send a message and directly return (no call to
nextFilter.filterClose)
The message is never sent. I added a Callback to WriteFuture, and
isWritten returns false.
What am I doing wrong?
How could intercept close?
I guess I answered this question before, but I'm not sure. So I will answer
again. :)
You need to create an IoFilter with a filterClose() method. The
filterClose() method can call nextFilter.filterWrite() to write a message.
But you shouldn't call nextFilter.filterClose() right now, you have to call
it in the callback of the returned WriteFuture:
public void filterClose(...) {
WriteFuture f = nextFilter.filterWrite(...);
f.setCallback(new IoFuture.Callback() {
public void operationComplete(...) {
nextFilter.filterClose(...); // nextFilter should be final
}
});
}
HTH,
Trustin
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