Re: Simple Task Scheduler

From:

Lew <lew@nospam.lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Sun, 25 Mar 2007 11:50:24 -0400

Message-ID:

<WPGdna8tEJLdB5vbnZ2dnUVZ_v2knZ2d@comcast.com>

soup_or_power@yahoo.com wrote:

On Mar 21, 6:26 pm, Lew <l...@nospam.lewscanon.com> wrote:

soup_or_po...@yahoo.com wrote:

The setDaemon method was ignored. I want to eventually port
this code to a servlet in a Tomcat environment. Unless the thread can
be sent to background as daemon, I think there is no way to make it
fly. I tested the code on a RedHat Linux. I'd appreciate any comments.

You aren't supposed to do any explicit thread spawning in a web application,
much less daemon threads. Good way to really hose things.

-- Lew

Thanks, Lew. When I made a servlet immplement Runnable the java
compiler didn't throw any errors.

There's no compile-time issue with such code, so it won't. You can implement
Runnable even in non-threaded code, in fact, but that is also irrelevant. The
issue is at runtime, when the Web container (Tomcat, JBoss, BEA, WebShere,
OAS, Glassfish, Sun App Server, ...) tries to manage the application's thread,
and the application is doing its own thread thing. Entanglement ensues.

It can be done, I suppose, but I wouldn't want to do it.

-- Lew