On 8/22/07, Kevin J. Rice <[EMAIL PROTECTED]> wrote:
> Hello!
>
> We're using Webware 0.9.1 and 0.9.4 in various places, so these questions
> apply to both versions:
>
> We're wondering 2 things:
>
> 1. Can we find the current running request for each thread, when that
> request started, and view the queue of requests not yet assigned to any
> thread?
>
> 2. Can we automatically identify a request being processed for more than a
> certain amount of time and terminate that request? This is a sort of a
> timeout setting concept.
>
I asked similar questions about 12 months ago so it might be worth
having a look in the mailing list archive. In the end I concluded that
terminating threads requires a Python extension that I did not want the
trouble of integrating (but which may be included in a future release).
As regards active requests, I have implemented a system that allows me
to find out what my threads are doing. It works like this:
In the base class for all my servlets, I include:
class MyPage(PSPPage):
def awake(self, transaction):
PSPPage.awake(self, transaction)
thread = threading.currentThread()
thread.status = dict()
self.setThreadStatus('awoke', time.asctime())
def sleep(self, trans):
PSPPage.sleep(self, trans)
self.setThreadStatus('awoke', 'asleep')
def setThreadStatus(self, name, value):
threading.currentThread().status[name] = value
Any servlet can use self.setThreadStatus() to record tidbits about what
it is doing.
Then I have a PSP servlet that displays the status for all threads:
<[EMAIL PROTECTED] extends="WebKit.Page"%>
<[EMAIL PROTECTED] method="writeContent"%>
<[EMAIL PROTECTED] imports="cgi, WebKit.ThreadedAppServer, threading"%>
<%
server = WebKit.ThreadedAppServer.server
%>
Active threads according to server: <%=server.activeThreadCount()%>
<%
allThreads = server._threadPool
notProcessing = 0
curThread = threading.currentThread()
threads = filter(lambda t: t != curThread, allThreads)
for thread in threads:
%>
<%if thread.processing:%>
<%
status = thread.__dict__.get('status', None)
if status is None:%>
<p>No status information available.</p>
<%end%>
<%else:%>
<table>
<%for key, value in status.items():%>
<tr><td><%=key%></td><td><%=cgi.escape(str(value))%></td></tr>
<%end%>
</table>
<%end%>
<%end%>
<%else: notProcessing = notProcessing + 1%>
<%end%>
<p>Not processing: <%=notProcessing%> +1 for thread servicing this
request</p>
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