How to control service shutdown sequence of dependent services

I am running three java applications say A,B,C as windows services with A having dependency on B and B having dependency on C.
Which means when you start A, It shall automatically start services B and C (Java programs running as service). And also when you stop C ,it shall stop first B and then A.
Problem I am facing is when you stop C. Windows first stop A then B.
I am able to register java applications as windows services with dependencies.Problem is when u stop service,Windows send signal to all the dependent services to stop and thus I am not able to control order in which services stop
Any help is appreciated
regards

In your web.xml, under the servlet tag, make A.jsp be loaded the first, at your web app 's startup:
<jsp-file>A.jsp</jsp-file>
<load-on-startup>0</load-on-startup>
...

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* On each request, I check (some condition X) to see if I can service the request immediately.
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In brief, there are a bunch of threads that are running my program. I want to control which thread runs when. I create a queue accessible to all threads, and also a condition that can be modified by any thread in a synchronized manner. Say the condition was just a counter. When a thread runs, it increments the counter. If the counter hits some threshold, future threads will be blocked, until a currently running thread completes its task and decrements the counter, after which it also notifies a blocked thread.
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I am not sure I understand your requirement completely. But, if you want to process requests at your control, let tomcat servlet add the requests to your program queue so that your program can process them one by one whenever it wants to.
For selective notification to a particular thread, each thread can wait on one object that is also shared by your program. So, one object is used as a monitor between your program and one waiting thread. I think you are doing this already!!?
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[SOLVED] systemd/User, starting a Dependent service

I am missing something simple here. I have two services. Once is dependent on the other.
I got the first service to start with:
$ cat ~/.config/systemd/user/[email protected]
[Unit]
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[email protected]
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And the status of the service shows it logging and working, picking up changes, etc.
I must be missing a configuration parameter in the service file.
Last edited by eduncan911 (2015-05-25 14:39:38)

mauritiusdadd wrote:
Just a shot in the dark, but try to change the After= and Requires= lines in [email protected] to
After=network.target syncthing@%i.service
Requires=syncthing@%i.service
You know how you stay up late and everything you do right seems to be wrong?
When I ran:
systemctl status [email protected]
...it showed inactive (dead) and is the reason I made this thread.
Changed it to this:
systemctl --user status [email protected]
Allowed me to see it started. *head smack*
And btw, I tried "syncthing@%i.service" and it worked too! I reverted back to "[email protected]" to verify %i fixed it, but it started as well as before. So "%i" seems agnostic and would work as well.

How to control the processing of the request?

I have something like this:
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This one is a tricky problem - a side-effect of JSF doing a lot of things automatically is that sometimes it does too much.
I don't have a great solution, but here's a couple of ideas:
(1) Try using multiple <h:form>s on your page (not nested one inside the other, but separate). Data will only get updated in the form that contains the button that got pressed.
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Neither of these are beautiful solutions - the second is way ugly - but they might help. Long-range, I'd love to see something like "subforms" supported in JSF that can provide finer grained control over what gets processed (validations, model pushes, etc.) and what doesn't without resorting to the blunt hammer of multiple HTML forms.
I'm a little confused about "the model is updated with the value of the components whenever the form is submitted, and regardless of whether the value of the components has changed or not.", because JSF is checking the old value and using ".equals()" to see if its changed. Note, however, that it's not caching the old value across the request, but simply going back to the model on the subsequent request, which may (or may not) explain the behavior you're seeing.
-- Adam Winer (EG member)

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