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Posted to users@wicket.apache.org by James <ja...@gmail.com> on 2011/11/21 02:59:20 UTC
How to build a hudson/jenkins like live log viewer?
Dear wicket community,
In a project that I'm working on, I need to build a "live log viewer" or
"dynamic log viewer" or "refreshable log viewer".
Much like how hudson/jenkins displays the console output.
The idea is to dynamically display the new data added to a log file along
with the existing content.
How to go about doing this? Please throw some light on this.
I searched about this in the web, mailing lists but couldn't find what I
was looking for, so I'm posting it here.
If this is asked elsewhere, kindly re-direct me to the respective resource.
--
Thanks & Regards,
James
A happy Wicket user
Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Or should I have two components?
One to display the existing content of the log and the other one to display
the dynamically added new content..?
On Mon, Nov 21, 2011 at 11:07 AM, James <ja...@gmail.com> wrote:
> Jeremy,
>
> Thanks for your suggestions.
>
>
> *>> I suppose you're only asking about the web UI portion of this
> application.*
>
> Yes, I was asking about the web ui portion only.
>
>
> *>> For the web UI part, there are basically two methods: push, poll*
>
> I would like to use the "poll" method. In fact, I'm trying exactly with
> the AjaxSelfUpdatingTimer behavior only.
> The problem is I don't want to display just the last x lines of the log
> but instead show the "current" content of the log while adding new content
> at the bottom.
> Something like "tail -F foo.log".
> I agree that if I were to display the last x lines, a
> LoadableDetachableModel implementation with the appropriate logic alone
> would be sufficient.
>
>
> On Mon, Nov 21, 2011 at 10:51 AM, Jeremy Thomerson <
> jeremy@wickettraining.com> wrote:
>
>> On Sun, Nov 20, 2011 at 8:59 PM, James <ja...@gmail.com> wrote:
>>
>> > Dear wicket community,
>> >
>> > In a project that I'm working on, I need to build a "live log viewer" or
>> > "dynamic log viewer" or "refreshable log viewer".
>> > Much like how hudson/jenkins displays the console output.
>> >
>> > The idea is to dynamically display the new data added to a log file
>> along
>> > with the existing content.
>> >
>> > How to go about doing this? Please throw some light on this.
>> >
>> > I searched about this in the web, mailing lists but couldn't find what I
>> > was looking for, so I'm posting it here.
>> > If this is asked elsewhere, kindly re-direct me to the respective
>> resource.
>> >
>>
>> I suppose you're only asking about the web UI portion of this application.
>> The service / backend stuff is out of the context of this forum.
>> (Although I would suggest looking at using something like Camel that has
>> all the necessary stuff for monitoring files and file streams and then
>> routing messages through to your application and/or other processors - see
>> [1] below).
>>
>> For the web UI part, there are basically two methods: push, poll
>>
>> 1 - push - using something like cometd, etc to do AJAX push events
>> (really,
>> these are long-pollers, leaving long-running HTTP requests going and
>> processing a stream of events that are received over the life of the
>> connection)
>>
>> 2 - poll - if you have some component that shows the last X lines of a log
>> file, just call component.add(new AjaxSelfUpdatingTimer(someDuration)).
>> As
>> long as you've written your IModel correctly (it always retrieves the most
>> up-to-date data), this will work "out of the box"
>>
>> [1] http://camel.apache.org/stream.html - and things like scanStream
>>
>> --
>> Jeremy Thomerson
>> http://wickettraining.com
>> *Need a CMS for Wicket? Use Brix! http://brixcms.org*
>>
>
>
>
> --
> Thanks & Regards,
> James
>
--
Thanks & Regards,
James
Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Jeremy,
Thanks for your suggestions.
*>> I suppose you're only asking about the web UI portion of this
application.*
Yes, I was asking about the web ui portion only.
*>> For the web UI part, there are basically two methods: push, poll*
I would like to use the "poll" method. In fact, I'm trying exactly with the
AjaxSelfUpdatingTimer behavior only.
The problem is I don't want to display just the last x lines of the log but
instead show the "current" content of the log while adding new content at
the bottom.
Something like "tail -F foo.log".
I agree that if I were to display the last x lines, a
LoadableDetachableModel implementation with the appropriate logic alone
would be sufficient.
On Mon, Nov 21, 2011 at 10:51 AM, Jeremy Thomerson <
jeremy@wickettraining.com> wrote:
> On Sun, Nov 20, 2011 at 8:59 PM, James <ja...@gmail.com> wrote:
>
> > Dear wicket community,
> >
> > In a project that I'm working on, I need to build a "live log viewer" or
> > "dynamic log viewer" or "refreshable log viewer".
> > Much like how hudson/jenkins displays the console output.
> >
> > The idea is to dynamically display the new data added to a log file along
> > with the existing content.
> >
> > How to go about doing this? Please throw some light on this.
> >
> > I searched about this in the web, mailing lists but couldn't find what I
> > was looking for, so I'm posting it here.
> > If this is asked elsewhere, kindly re-direct me to the respective
> resource.
> >
>
> I suppose you're only asking about the web UI portion of this application.
> The service / backend stuff is out of the context of this forum.
> (Although I would suggest looking at using something like Camel that has
> all the necessary stuff for monitoring files and file streams and then
> routing messages through to your application and/or other processors - see
> [1] below).
>
> For the web UI part, there are basically two methods: push, poll
>
> 1 - push - using something like cometd, etc to do AJAX push events (really,
> these are long-pollers, leaving long-running HTTP requests going and
> processing a stream of events that are received over the life of the
> connection)
>
> 2 - poll - if you have some component that shows the last X lines of a log
> file, just call component.add(new AjaxSelfUpdatingTimer(someDuration)). As
> long as you've written your IModel correctly (it always retrieves the most
> up-to-date data), this will work "out of the box"
>
> [1] http://camel.apache.org/stream.html - and things like scanStream
>
> --
> Jeremy Thomerson
> http://wickettraining.com
> *Need a CMS for Wicket? Use Brix! http://brixcms.org*
>
--
Thanks & Regards,
James
Re: How to build a hudson/jenkins like live log viewer?
Posted by Jeremy Thomerson <je...@wickettraining.com>.
On Sun, Nov 20, 2011 at 8:59 PM, James <ja...@gmail.com> wrote:
> Dear wicket community,
>
> In a project that I'm working on, I need to build a "live log viewer" or
> "dynamic log viewer" or "refreshable log viewer".
> Much like how hudson/jenkins displays the console output.
>
> The idea is to dynamically display the new data added to a log file along
> with the existing content.
>
> How to go about doing this? Please throw some light on this.
>
> I searched about this in the web, mailing lists but couldn't find what I
> was looking for, so I'm posting it here.
> If this is asked elsewhere, kindly re-direct me to the respective resource.
>
I suppose you're only asking about the web UI portion of this application.
The service / backend stuff is out of the context of this forum.
(Although I would suggest looking at using something like Camel that has
all the necessary stuff for monitoring files and file streams and then
routing messages through to your application and/or other processors - see
[1] below).
For the web UI part, there are basically two methods: push, poll
1 - push - using something like cometd, etc to do AJAX push events (really,
these are long-pollers, leaving long-running HTTP requests going and
processing a stream of events that are received over the life of the
connection)
2 - poll - if you have some component that shows the last X lines of a log
file, just call component.add(new AjaxSelfUpdatingTimer(someDuration)). As
long as you've written your IModel correctly (it always retrieves the most
up-to-date data), this will work "out of the box"
[1] http://camel.apache.org/stream.html - and things like scanStream
--
Jeremy Thomerson
http://wickettraining.com
*Need a CMS for Wicket? Use Brix! http://brixcms.org*
Re: How to build a hudson/jenkins like live log viewer?
Posted by James Selvakumar <ja...@gmail.com>.
Guys,
This works like a charm. I'm using it in in our project. Thanks once again
for all your suggestions.
Just a minor correction in case you are using a MultiLineLabel for
"nextLog".
While appending Javascript in the "onPostProcessTarget" method, instead of:
use:
This is needed because ".text()" method removes the html formatting (i.e the
<br> tags) added by MultiLineLabel.
Cheers.
--
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Re: How to build a hudson/jenkins like live log viewer?
Posted by Martin Grigorov <mg...@apache.org>.
Hi,
Check the source code of these two examples:
http://www.wicket-library.com/wicket-examples/ajax/clock
http://www.wicket-library.com/wicket-examples/ajax/world-clock
For your task you can use MultilineLabel component to show the current
content. Just refresh its model with the latest content of the file.
This wont be very effective because it will re-deliver the whole file
content again and again but it is the most simple way.
When you become more acquaint with Wicket you can optimize it by
re-delivering just the new stuff that is not already shown in the
previous repaint.
On Tue, Mar 20, 2012 at 1:55 AM, kiwi.ryu <ki...@gmail.com> wrote:
> Hi, as i mentioned i am new to wicket, can you pls tell me how to call this
> final code mentioned in this thread?
>
> i can't have this in constructor, I need to have this code executed after a
> file selection. Now how do I
> add these 2 div's during initialization. I have no idea.
>
> please respond ASAP.
>
> Thanks in advance
>
> --
> View this message in context: http://apache-wicket.1842946.n4.nabble.com/How-to-build-a-hudson-jenkins-like-live-log-viewer-tp4090224p4487006.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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>
--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com
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Re: How to build a hudson/jenkins like live log viewer?
Posted by "kiwi.ryu" <ki...@gmail.com>.
Hi, as i mentioned i am new to wicket, can you pls tell me how to call this
final code mentioned in this thread?
i can't have this in constructor, I need to have this code executed after a
file selection. Now how do I
add these 2 div's during initialization. I have no idea.
please respond ASAP.
Thanks in advance
--
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Re: How to build a hudson/jenkins like live log viewer?
Posted by Josh Kamau <jo...@gmail.com>.
James ;
Load the file , set it as value for a label component, then add
ajaxtimerbehaviour (or something like that) to keep refreshing the label..
Josh.
On Fri, Mar 16, 2012 at 10:26 PM, kiwi.ryu <ki...@gmail.com> wrote:
> Hi, am working on kind of similar use case to build a log viewer. New to
> wicket..can you share how would you invoke this code from your wicket class
> based on user selection of a file? appreciate ur inputs. thank you.
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/How-to-build-a-hudson-jenkins-like-live-log-viewer-tp4090224p4479107.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
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>
>
Re: How to build a hudson/jenkins like live log viewer?
Posted by "kiwi.ryu" <ki...@gmail.com>.
Hi, am working on kind of similar use case to build a log viewer. New to
wicket..can you share how would you invoke this code from your wicket class
based on user selection of a file? appreciate ur inputs. thank you.
--
View this message in context: http://apache-wicket.1842946.n4.nabble.com/How-to-build-a-hudson-jenkins-like-live-log-viewer-tp4090224p4479107.html
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Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Thanks everybody. I finally managed to display the content of an active log
file.
As mentioned in the earlier responses, all you need is two labels.
*Markup*:
<div id="logData" wicket:id="logData"></div>
<div id="nextLog" wicket:id="nextLog"></div>
*Java*:
Create the "logData" label as you would normally create labels and load the
content of the log file.
Something like this:
private MultiLineLabel createLogData()
{
return new MultiLineLabel("logData", new
LoadableDetachableModel<Object>()
{
@Override
protected Object load()
{
try{
return FileUtils.readFiletoString(file);
}catch(Exception ex){}
return "";
}
});
}
And now the interesting component "nextLog". It might look something like
this:
private Label createNextLog()
{
Label nextLog = new Label("nextLog", new
LoadableDetachableModel<Object>()
{
@Override
protected Object load()
{
//use a tailing api like "Tailer" in commons-io or may be
just java.io.RandomAccessFile?
return "your 'tail' content goes here";
}
}){
// This is needed because, wicket created dynamic ids for the
"nextLog" component
@Override
public String getMarkupId(boolean createIfDoesNotExist)
{
return "nextLog";
}
};
nextLog.add(new
AjaxSelfUpdatingTimerBehavior(Duration.seconds(REFRESH_INTERVAL))
{
@Override
protected void onPostProcessTarget(AjaxRequestTarget target)
{
/*
* We are doing the following here:
* - append the content of "nextLog" to "logData"
* - remove "nextLog"
* - insert "nextLog" after "logData".
*/
target.appendJavascript(
"$('#logData').append('<p>' + $('#nextLog').text()
+ '</p>');" +
"$('#nextLog').remove();" +
"$(\"<div
id='nextLog'>\").insertAfter($('#logData'));");
}
});
nextLog.setOutputMarkupId(true);
return nextLog;
}
Thank you once again for each and everyone who took their time to give your
thoughts/suggestions. They were precious and I learned a lot by merely
interacting with this wonderful community.
On Mon, Nov 21, 2011 at 1:53 PM, James <ja...@gmail.com> wrote:
> Thanks Igor. You simplified it to the maximum.
> On Nov 21, 2011 1:36 PM, "Igor Vaynberg" <ig...@gmail.com> wrote:
>
>> a much simplified version:
>>
>> <div wicket:id="logData">log contents</div>
>> <div wicket:id="nextLog">next log call</div>
>>
>> no panel needed. add self-updating behavior to next log call and in
>> the callback also add
>>
>> target.appendjavascript( "$('#logdata).append($('#nextlog).content());
>> $('#nextlog').remove(); $('#logdata).insertafter($('<div
>> id='nextlog'>));" )
>>
>> im paraphrasing jquery here, but the is that you repaint the nextog
>> div and add javascript that after the repaint you move its contents to
>> the logdata div, and then empty the nextlog div. of course the nextlog
>> div should be hidden via css....
>>
>> -igor
>>
>>
>> On Sun, Nov 20, 2011 at 7:46 PM, Clint Checketts <ch...@gmail.com>
>> wrote:
>> > I'd need to look at Tailer to see how it operates. But here is how I'd
>> try
>> > it (it is quick and I don't like the markup, but we'll optimize it
>> later:
>> >
>> > Create a panel that looks like so (we'll call it LoggingPanel):
>> >
>> > <wicket:panel>
>> > <div wicket:id="logData">log contents</div>
>> > <div wicket:id="nextLog">next log call</div>
>> > </wicket:panel>
>> >
>> > Add a self updating timer behavior so the panel check the Tailer for
>> > output, if there is data, then update the logData label with it, make
>> the
>> > nextLog component be another LoggingPanel with a
>> SelfUpdatingTImerBehavior,
>> > and stop the timerbehavior on the current panel.
>> >
>> > Drawbacks are: the divs keep getting nested, so the markup isn't the
>> most
>> > beautiful, so setRenderBodyOnly(true) might make it nicer.
>> >
>> > -Clint
>> >
>> > On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com>
>> wrote:
>> >
>> >> Thanks Steve. I'll look into the commons-io "Tailer".
>> >> But any idea on how to use this with wicket?
>> >>
>> >> On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
>> >> steve.swinsburg@gmail.com
>> >> > wrote:
>> >>
>> >> > I've done something similar to this using the Tailer class from
>> >> commons-io.
>> >> >
>> >> > cheers,
>> >> > Steve
>> >> >
>> >> >
>> >> > On 21/11/2011, at 12:59 PM, James wrote:
>> >> >
>> >> > > Dear wicket community,
>> >> > >
>> >> > > In a project that I'm working on, I need to build a "live log
>> viewer"
>> >> or
>> >> > > "dynamic log viewer" or "refreshable log viewer".
>> >> > > Much like how hudson/jenkins displays the console output.
>> >> > >
>> >> > > The idea is to dynamically display the new data added to a log file
>> >> along
>> >> > > with the existing content.
>> >> > >
>> >> > > How to go about doing this? Please throw some light on this.
>> >> > >
>> >> > > I searched about this in the web, mailing lists but couldn't find
>> what
>> >> I
>> >> > > was looking for, so I'm posting it here.
>> >> > > If this is asked elsewhere, kindly re-direct me to the respective
>> >> > resource.
>> >> > >
>> >> > > --
>> >> > > Thanks & Regards,
>> >> > > James
>> >> > > A happy Wicket user
>> >> >
>> >> >
>> >> > ---------------------------------------------------------------------
>> >> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> >> > For additional commands, e-mail: users-help@wicket.apache.org
>> >> >
>> >> >
>> >>
>> >>
>> >> --
>> >> Thanks & Regards,
>> >> James
>> >>
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
--
Thanks & Regards,
James
Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Thanks Igor. You simplified it to the maximum.
On Nov 21, 2011 1:36 PM, "Igor Vaynberg" <ig...@gmail.com> wrote:
> a much simplified version:
>
> <div wicket:id="logData">log contents</div>
> <div wicket:id="nextLog">next log call</div>
>
> no panel needed. add self-updating behavior to next log call and in
> the callback also add
>
> target.appendjavascript( "$('#logdata).append($('#nextlog).content());
> $('#nextlog').remove(); $('#logdata).insertafter($('<div
> id='nextlog'>));" )
>
> im paraphrasing jquery here, but the is that you repaint the nextog
> div and add javascript that after the repaint you move its contents to
> the logdata div, and then empty the nextlog div. of course the nextlog
> div should be hidden via css....
>
> -igor
>
>
> On Sun, Nov 20, 2011 at 7:46 PM, Clint Checketts <ch...@gmail.com>
> wrote:
> > I'd need to look at Tailer to see how it operates. But here is how I'd
> try
> > it (it is quick and I don't like the markup, but we'll optimize it later:
> >
> > Create a panel that looks like so (we'll call it LoggingPanel):
> >
> > <wicket:panel>
> > <div wicket:id="logData">log contents</div>
> > <div wicket:id="nextLog">next log call</div>
> > </wicket:panel>
> >
> > Add a self updating timer behavior so the panel check the Tailer for
> > output, if there is data, then update the logData label with it, make the
> > nextLog component be another LoggingPanel with a
> SelfUpdatingTImerBehavior,
> > and stop the timerbehavior on the current panel.
> >
> > Drawbacks are: the divs keep getting nested, so the markup isn't the most
> > beautiful, so setRenderBodyOnly(true) might make it nicer.
> >
> > -Clint
> >
> > On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com> wrote:
> >
> >> Thanks Steve. I'll look into the commons-io "Tailer".
> >> But any idea on how to use this with wicket?
> >>
> >> On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
> >> steve.swinsburg@gmail.com
> >> > wrote:
> >>
> >> > I've done something similar to this using the Tailer class from
> >> commons-io.
> >> >
> >> > cheers,
> >> > Steve
> >> >
> >> >
> >> > On 21/11/2011, at 12:59 PM, James wrote:
> >> >
> >> > > Dear wicket community,
> >> > >
> >> > > In a project that I'm working on, I need to build a "live log
> viewer"
> >> or
> >> > > "dynamic log viewer" or "refreshable log viewer".
> >> > > Much like how hudson/jenkins displays the console output.
> >> > >
> >> > > The idea is to dynamically display the new data added to a log file
> >> along
> >> > > with the existing content.
> >> > >
> >> > > How to go about doing this? Please throw some light on this.
> >> > >
> >> > > I searched about this in the web, mailing lists but couldn't find
> what
> >> I
> >> > > was looking for, so I'm posting it here.
> >> > > If this is asked elsewhere, kindly re-direct me to the respective
> >> > resource.
> >> > >
> >> > > --
> >> > > Thanks & Regards,
> >> > > James
> >> > > A happy Wicket user
> >> >
> >> >
> >> > ---------------------------------------------------------------------
> >> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >> > For additional commands, e-mail: users-help@wicket.apache.org
> >> >
> >> >
> >>
> >>
> >> --
> >> Thanks & Regards,
> >> James
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
Re: How to build a hudson/jenkins like live log viewer?
Posted by Igor Vaynberg <ig...@gmail.com>.
a much simplified version:
<div wicket:id="logData">log contents</div>
<div wicket:id="nextLog">next log call</div>
no panel needed. add self-updating behavior to next log call and in
the callback also add
target.appendjavascript( "$('#logdata).append($('#nextlog).content());
$('#nextlog').remove(); $('#logdata).insertafter($('<div
id='nextlog'>));" )
im paraphrasing jquery here, but the is that you repaint the nextog
div and add javascript that after the repaint you move its contents to
the logdata div, and then empty the nextlog div. of course the nextlog
div should be hidden via css....
-igor
On Sun, Nov 20, 2011 at 7:46 PM, Clint Checketts <ch...@gmail.com> wrote:
> I'd need to look at Tailer to see how it operates. But here is how I'd try
> it (it is quick and I don't like the markup, but we'll optimize it later:
>
> Create a panel that looks like so (we'll call it LoggingPanel):
>
> <wicket:panel>
> <div wicket:id="logData">log contents</div>
> <div wicket:id="nextLog">next log call</div>
> </wicket:panel>
>
> Add a self updating timer behavior so the panel check the Tailer for
> output, if there is data, then update the logData label with it, make the
> nextLog component be another LoggingPanel with a SelfUpdatingTImerBehavior,
> and stop the timerbehavior on the current panel.
>
> Drawbacks are: the divs keep getting nested, so the markup isn't the most
> beautiful, so setRenderBodyOnly(true) might make it nicer.
>
> -Clint
>
> On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com> wrote:
>
>> Thanks Steve. I'll look into the commons-io "Tailer".
>> But any idea on how to use this with wicket?
>>
>> On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
>> steve.swinsburg@gmail.com
>> > wrote:
>>
>> > I've done something similar to this using the Tailer class from
>> commons-io.
>> >
>> > cheers,
>> > Steve
>> >
>> >
>> > On 21/11/2011, at 12:59 PM, James wrote:
>> >
>> > > Dear wicket community,
>> > >
>> > > In a project that I'm working on, I need to build a "live log viewer"
>> or
>> > > "dynamic log viewer" or "refreshable log viewer".
>> > > Much like how hudson/jenkins displays the console output.
>> > >
>> > > The idea is to dynamically display the new data added to a log file
>> along
>> > > with the existing content.
>> > >
>> > > How to go about doing this? Please throw some light on this.
>> > >
>> > > I searched about this in the web, mailing lists but couldn't find what
>> I
>> > > was looking for, so I'm posting it here.
>> > > If this is asked elsewhere, kindly re-direct me to the respective
>> > resource.
>> > >
>> > > --
>> > > Thanks & Regards,
>> > > James
>> > > A happy Wicket user
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> > For additional commands, e-mail: users-help@wicket.apache.org
>> >
>> >
>>
>>
>> --
>> Thanks & Regards,
>> James
>>
>
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Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Thanks Steve for the code. Igor has almost given all the code we might ever
need for the ui part.
Clint,
I tried your suggestions but it was challenging to start stop the self
updating behavoir.
On Nov 21, 2011 1:22 PM, "Steve Swinsburg" <st...@gmail.com>
wrote:
> For the backend, I have the Tailer running in a Thread, and keep a
> reference to it. The you can interrupt the thread as desired by calling
> thread.interrupt(). Some backend code you might find useful:
>
> private Thread thread;
>
> public void destroy() {
> //set the flag to tell our listener to shutdown
> stopListener();
> }
>
>
> public void startListener(File f) {
> if(thread == null) {
> //setup the listener and start the thread
> TailerListener listener = new LogTailListener();
> Tailer tailer = new Tailer(f, listener, 1000, true);
>
> thread = new Thread(tailer, THREAD_NAME);
> thread.start();
> }
> }
>
> public void stopListener() {
> thread.interrupt();
> }
>
> Interested to see your UI when you are done, please share!
>
> cheers,
> Steve
>
>
>
> On 21/11/2011, at 3:10 PM, James wrote:
>
> > Clint,
> >
> > Thanks for this idea. Let me give a try to it.
> > Pondering whether the Tailer would introduce any memory leaks if we
> > navigate to a different page.
> >
> > On Mon, Nov 21, 2011 at 11:46 AM, Clint Checketts <checketts@gmail.com
> >wrote:
> >
> >> I'd need to look at Tailer to see how it operates. But here is how I'd
> try
> >> it (it is quick and I don't like the markup, but we'll optimize it
> later:
> >>
> >> Create a panel that looks like so (we'll call it LoggingPanel):
> >>
> >> <wicket:panel>
> >> <div wicket:id="logData">log contents</div>
> >> <div wicket:id="nextLog">next log call</div>
> >> </wicket:panel>
> >>
> >> Add a self updating timer behavior so the panel check the Tailer for
> >> output, if there is data, then update the logData label with it, make
> the
> >> nextLog component be another LoggingPanel with a
> SelfUpdatingTImerBehavior,
> >> and stop the timerbehavior on the current panel.
> >>
> >> Drawbacks are: the divs keep getting nested, so the markup isn't the
> most
> >> beautiful, so setRenderBodyOnly(true) might make it nicer.
> >>
> >> -Clint
> >>
> >> On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com>
> wrote:
> >>
> >>> Thanks Steve. I'll look into the commons-io "Tailer".
> >>> But any idea on how to use this with wicket?
> >>>
> >>> On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
> >>> steve.swinsburg@gmail.com
> >>>> wrote:
> >>>
> >>>> I've done something similar to this using the Tailer class from
> >>> commons-io.
> >>>>
> >>>> cheers,
> >>>> Steve
> >>>>
> >>>>
> >>>> On 21/11/2011, at 12:59 PM, James wrote:
> >>>>
> >>>>> Dear wicket community,
> >>>>>
> >>>>> In a project that I'm working on, I need to build a "live log viewer"
> >>> or
> >>>>> "dynamic log viewer" or "refreshable log viewer".
> >>>>> Much like how hudson/jenkins displays the console output.
> >>>>>
> >>>>> The idea is to dynamically display the new data added to a log file
> >>> along
> >>>>> with the existing content.
> >>>>>
> >>>>> How to go about doing this? Please throw some light on this.
> >>>>>
> >>>>> I searched about this in the web, mailing lists but couldn't find
> >> what
> >>> I
> >>>>> was looking for, so I'm posting it here.
> >>>>> If this is asked elsewhere, kindly re-direct me to the respective
> >>>> resource.
> >>>>>
> >>>>> --
> >>>>> Thanks & Regards,
> >>>>> James
> >>>>> A happy Wicket user
> >>>>
> >>>>
> >>>> ---------------------------------------------------------------------
> >>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> >>>> For additional commands, e-mail: users-help@wicket.apache.org
> >>>>
> >>>>
> >>>
> >>>
> >>> --
> >>> Thanks & Regards,
> >>> James
> >>>
> >>
> >
> >
> >
> > --
> > Thanks & Regards,
> > James
>
>
Re: How to build a hudson/jenkins like live log viewer?
Posted by Steve Swinsburg <st...@gmail.com>.
For the backend, I have the Tailer running in a Thread, and keep a reference to it. The you can interrupt the thread as desired by calling thread.interrupt(). Some backend code you might find useful:
private Thread thread;
public void destroy() {
//set the flag to tell our listener to shutdown
stopListener();
}
public void startListener(File f) {
if(thread == null) {
//setup the listener and start the thread
TailerListener listener = new LogTailListener();
Tailer tailer = new Tailer(f, listener, 1000, true);
thread = new Thread(tailer, THREAD_NAME);
thread.start();
}
}
public void stopListener() {
thread.interrupt();
}
Interested to see your UI when you are done, please share!
cheers,
Steve
On 21/11/2011, at 3:10 PM, James wrote:
> Clint,
>
> Thanks for this idea. Let me give a try to it.
> Pondering whether the Tailer would introduce any memory leaks if we
> navigate to a different page.
>
> On Mon, Nov 21, 2011 at 11:46 AM, Clint Checketts <ch...@gmail.com>wrote:
>
>> I'd need to look at Tailer to see how it operates. But here is how I'd try
>> it (it is quick and I don't like the markup, but we'll optimize it later:
>>
>> Create a panel that looks like so (we'll call it LoggingPanel):
>>
>> <wicket:panel>
>> <div wicket:id="logData">log contents</div>
>> <div wicket:id="nextLog">next log call</div>
>> </wicket:panel>
>>
>> Add a self updating timer behavior so the panel check the Tailer for
>> output, if there is data, then update the logData label with it, make the
>> nextLog component be another LoggingPanel with a SelfUpdatingTImerBehavior,
>> and stop the timerbehavior on the current panel.
>>
>> Drawbacks are: the divs keep getting nested, so the markup isn't the most
>> beautiful, so setRenderBodyOnly(true) might make it nicer.
>>
>> -Clint
>>
>> On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com> wrote:
>>
>>> Thanks Steve. I'll look into the commons-io "Tailer".
>>> But any idea on how to use this with wicket?
>>>
>>> On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
>>> steve.swinsburg@gmail.com
>>>> wrote:
>>>
>>>> I've done something similar to this using the Tailer class from
>>> commons-io.
>>>>
>>>> cheers,
>>>> Steve
>>>>
>>>>
>>>> On 21/11/2011, at 12:59 PM, James wrote:
>>>>
>>>>> Dear wicket community,
>>>>>
>>>>> In a project that I'm working on, I need to build a "live log viewer"
>>> or
>>>>> "dynamic log viewer" or "refreshable log viewer".
>>>>> Much like how hudson/jenkins displays the console output.
>>>>>
>>>>> The idea is to dynamically display the new data added to a log file
>>> along
>>>>> with the existing content.
>>>>>
>>>>> How to go about doing this? Please throw some light on this.
>>>>>
>>>>> I searched about this in the web, mailing lists but couldn't find
>> what
>>> I
>>>>> was looking for, so I'm posting it here.
>>>>> If this is asked elsewhere, kindly re-direct me to the respective
>>>> resource.
>>>>>
>>>>> --
>>>>> Thanks & Regards,
>>>>> James
>>>>> A happy Wicket user
>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>>>> For additional commands, e-mail: users-help@wicket.apache.org
>>>>
>>>>
>>>
>>>
>>> --
>>> Thanks & Regards,
>>> James
>>>
>>
>
>
>
> --
> Thanks & Regards,
> James
Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Clint,
Thanks for this idea. Let me give a try to it.
Pondering whether the Tailer would introduce any memory leaks if we
navigate to a different page.
On Mon, Nov 21, 2011 at 11:46 AM, Clint Checketts <ch...@gmail.com>wrote:
> I'd need to look at Tailer to see how it operates. But here is how I'd try
> it (it is quick and I don't like the markup, but we'll optimize it later:
>
> Create a panel that looks like so (we'll call it LoggingPanel):
>
> <wicket:panel>
> <div wicket:id="logData">log contents</div>
> <div wicket:id="nextLog">next log call</div>
> </wicket:panel>
>
> Add a self updating timer behavior so the panel check the Tailer for
> output, if there is data, then update the logData label with it, make the
> nextLog component be another LoggingPanel with a SelfUpdatingTImerBehavior,
> and stop the timerbehavior on the current panel.
>
> Drawbacks are: the divs keep getting nested, so the markup isn't the most
> beautiful, so setRenderBodyOnly(true) might make it nicer.
>
> -Clint
>
> On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com> wrote:
>
> > Thanks Steve. I'll look into the commons-io "Tailer".
> > But any idea on how to use this with wicket?
> >
> > On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
> > steve.swinsburg@gmail.com
> > > wrote:
> >
> > > I've done something similar to this using the Tailer class from
> > commons-io.
> > >
> > > cheers,
> > > Steve
> > >
> > >
> > > On 21/11/2011, at 12:59 PM, James wrote:
> > >
> > > > Dear wicket community,
> > > >
> > > > In a project that I'm working on, I need to build a "live log viewer"
> > or
> > > > "dynamic log viewer" or "refreshable log viewer".
> > > > Much like how hudson/jenkins displays the console output.
> > > >
> > > > The idea is to dynamically display the new data added to a log file
> > along
> > > > with the existing content.
> > > >
> > > > How to go about doing this? Please throw some light on this.
> > > >
> > > > I searched about this in the web, mailing lists but couldn't find
> what
> > I
> > > > was looking for, so I'm posting it here.
> > > > If this is asked elsewhere, kindly re-direct me to the respective
> > > resource.
> > > >
> > > > --
> > > > Thanks & Regards,
> > > > James
> > > > A happy Wicket user
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > > For additional commands, e-mail: users-help@wicket.apache.org
> > >
> > >
> >
> >
> > --
> > Thanks & Regards,
> > James
> >
>
--
Thanks & Regards,
James
Re: How to build a hudson/jenkins like live log viewer?
Posted by Clint Checketts <ch...@gmail.com>.
I'd need to look at Tailer to see how it operates. But here is how I'd try
it (it is quick and I don't like the markup, but we'll optimize it later:
Create a panel that looks like so (we'll call it LoggingPanel):
<wicket:panel>
<div wicket:id="logData">log contents</div>
<div wicket:id="nextLog">next log call</div>
</wicket:panel>
Add a self updating timer behavior so the panel check the Tailer for
output, if there is data, then update the logData label with it, make the
nextLog component be another LoggingPanel with a SelfUpdatingTImerBehavior,
and stop the timerbehavior on the current panel.
Drawbacks are: the divs keep getting nested, so the markup isn't the most
beautiful, so setRenderBodyOnly(true) might make it nicer.
-Clint
On Sun, Nov 20, 2011 at 9:27 PM, James <ja...@gmail.com> wrote:
> Thanks Steve. I'll look into the commons-io "Tailer".
> But any idea on how to use this with wicket?
>
> On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <
> steve.swinsburg@gmail.com
> > wrote:
>
> > I've done something similar to this using the Tailer class from
> commons-io.
> >
> > cheers,
> > Steve
> >
> >
> > On 21/11/2011, at 12:59 PM, James wrote:
> >
> > > Dear wicket community,
> > >
> > > In a project that I'm working on, I need to build a "live log viewer"
> or
> > > "dynamic log viewer" or "refreshable log viewer".
> > > Much like how hudson/jenkins displays the console output.
> > >
> > > The idea is to dynamically display the new data added to a log file
> along
> > > with the existing content.
> > >
> > > How to go about doing this? Please throw some light on this.
> > >
> > > I searched about this in the web, mailing lists but couldn't find what
> I
> > > was looking for, so I'm posting it here.
> > > If this is asked elsewhere, kindly re-direct me to the respective
> > resource.
> > >
> > > --
> > > Thanks & Regards,
> > > James
> > > A happy Wicket user
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > For additional commands, e-mail: users-help@wicket.apache.org
> >
> >
>
>
> --
> Thanks & Regards,
> James
>
Re: How to build a hudson/jenkins like live log viewer?
Posted by James <ja...@gmail.com>.
Thanks Steve. I'll look into the commons-io "Tailer".
But any idea on how to use this with wicket?
On Mon, Nov 21, 2011 at 11:10 AM, Steve Swinsburg <steve.swinsburg@gmail.com
> wrote:
> I've done something similar to this using the Tailer class from commons-io.
>
> cheers,
> Steve
>
>
> On 21/11/2011, at 12:59 PM, James wrote:
>
> > Dear wicket community,
> >
> > In a project that I'm working on, I need to build a "live log viewer" or
> > "dynamic log viewer" or "refreshable log viewer".
> > Much like how hudson/jenkins displays the console output.
> >
> > The idea is to dynamically display the new data added to a log file along
> > with the existing content.
> >
> > How to go about doing this? Please throw some light on this.
> >
> > I searched about this in the web, mailing lists but couldn't find what I
> > was looking for, so I'm posting it here.
> > If this is asked elsewhere, kindly re-direct me to the respective
> resource.
> >
> > --
> > Thanks & Regards,
> > James
> > A happy Wicket user
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
--
Thanks & Regards,
James
Re: How to build a hudson/jenkins like live log viewer?
Posted by Steve Swinsburg <st...@gmail.com>.
I've done something similar to this using the Tailer class from commons-io.
cheers,
Steve
On 21/11/2011, at 12:59 PM, James wrote:
> Dear wicket community,
>
> In a project that I'm working on, I need to build a "live log viewer" or
> "dynamic log viewer" or "refreshable log viewer".
> Much like how hudson/jenkins displays the console output.
>
> The idea is to dynamically display the new data added to a log file along
> with the existing content.
>
> How to go about doing this? Please throw some light on this.
>
> I searched about this in the web, mailing lists but couldn't find what I
> was looking for, so I'm posting it here.
> If this is asked elsewhere, kindly re-direct me to the respective resource.
>
> --
> Thanks & Regards,
> James
> A happy Wicket user
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