RE: T5 developing with WTP and TOMCAT
Hello,
About this topic, I tried some investigations on my side, and I found out that
the reason why classes don't auto-reload is that the WebappClassLoader of
tomcat 5 (I currently use tomcat 5.0, but I guess it's the same on Tomcat 5.5)
keeps in cache (in a Hashtable more precisely) all classes it already loaded
once.
And this cache is never cleared, except when the WebappClassLoader is stopped.
So, when the class file is modified on the disk, tapestry 5 clears its own
cache, and then asks to the parent classloader (WebAppClassLoader) to reload
the class, which then serves the previous version of the class from its cache.
The result is that the class is never actually updated until the next restart
of tomcat.
So, as a temporary solution, I tried to develop a class extending
WebappClassLoader that does not cache classes for packages containing .pages.
and .components.. The source of this class is :
public class Tapestry5DevClassLoader extends WebappClassLoader{
private static String[]
noCacheElements={.pages.,/pages/,.components.,/components/};
public Tapestry5DevClassLoader() {
super();
}
public Tapestry5DevClassLoader(ClassLoader arg0) {
super(arg0);
}
@Override
protected InputStream findLoadedResource(String arg0) {
InputStream is=super.findLoadedResource(arg0);
if (is!=null){
if (isNoCacheElement(arg0))
return null;
}
return is;
}
private boolean isNoCacheElement(String name){
for (int i=0;inoCacheElements.length;i++){
if (name.indexOf(noCacheElements[i])=0)
return true;
}
return false;
}
}
To make it work, you have to do 2 things :
- Compile the class and add it to the server/classes (or server/lib if you
package it in a jar) directory of your tomcat installation directory.
- in your server.xml file, modify the context declaration and disable tomcat's
auto-reloading functionality, and declare the newly created classloader instead
of the default one :
Context docBase=testtapestry5 path=/testtapestry5 reloadable=false
source=org.eclipse.jst.j2ee.server:testtapestry5
Loader
loaderClass=net.atos.mm.fwk.tapestry5.classloader.Tapestry5DevClassLoader
/Loader
/Context
This is of course a temporary solution, but I tried it and it works for me.
Waiting for something better, I hope it can help.
Gregory Brysbaert
-Message d'origine-
De : Thiago H de Paula Figueiredo [mailto:[EMAIL PROTECTED]
Envoyé : jeudi 16 août 2007 18:59
À : Tapestry users
Objet : Re: T5 developing with WTP and TOMCAT
On Thu, 16 Aug 2007 12:54:31 -0300, Denny [EMAIL PROTECTED] wrote:
Ok, now, I am using jettylauncher eclipse plugin to develop T5. I hope T5
can fix the problem about working with tomcat. There are many people
using tomcat for develop and product.
It's a Tomcat issue, not a Tapestry one. Howard explains the problem here:
http://tapestryjava.blogspot.com/2007/02/fighting-with-tomcat.html
--
Thiago H. de Paula Figueiredo
Desenvolvedor, Instrutor e Consultor de Tecnologia
Eteg Tecnologia da Informação Ltda.
http://www.eteg.com.br
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Re: T5 developing with WTP and TOMCAT
Hello Gregory,
Nice that you've posted here the hot reloading issue, but have you
succeeded in deploying maven project under WTP?
We've tried today but failed. We required to do some .project hacks
but maven libraries are still not associated with the deployed WAR
Renat
On 05/09/07, Brysbaert Gregory [EMAIL PROTECTED] wrote:
Hello,
About this topic, I tried some investigations on my side, and I found out
that the reason why classes don't auto-reload is that the WebappClassLoader
of tomcat 5 (I currently use tomcat 5.0, but I guess it's the same on Tomcat
5.5) keeps in cache (in a Hashtable more precisely) all classes it already
loaded once.
And this cache is never cleared, except when the WebappClassLoader is stopped.
So, when the class file is modified on the disk, tapestry 5 clears its own
cache, and then asks to the parent classloader (WebAppClassLoader) to reload
the class, which then serves the previous version of the class from its
cache. The result is that the class is never actually updated until the next
restart of tomcat.
So, as a temporary solution, I tried to develop a class extending
WebappClassLoader that does not cache classes for packages containing
.pages. and .components.. The source of this class is :
public class Tapestry5DevClassLoader extends WebappClassLoader{
private static String[]
noCacheElements={.pages.,/pages/,.components.,/components/};
public Tapestry5DevClassLoader() {
super();
}
public Tapestry5DevClassLoader(ClassLoader arg0) {
super(arg0);
}
@Override
protected InputStream findLoadedResource(String arg0) {
InputStream is=super.findLoadedResource(arg0);
if (is!=null){
if (isNoCacheElement(arg0))
return null;
}
return is;
}
private boolean isNoCacheElement(String name){
for (int i=0;inoCacheElements.length;i++){
if (name.indexOf(noCacheElements[i])=0)
return true;
}
return false;
}
}
To make it work, you have to do 2 things :
- Compile the class and add it to the server/classes (or server/lib if you
package it in a jar) directory of your tomcat installation directory.
- in your server.xml file, modify the context declaration and disable
tomcat's auto-reloading functionality, and declare the newly created
classloader instead of the default one :
Context docBase=testtapestry5 path=/testtapestry5 reloadable=false
source=org.eclipse.jst.j2ee.server:testtapestry5
Loader
loaderClass=net.atos.mm.fwk.tapestry5.classloader.Tapestry5DevClassLoader
/Loader
/Context
This is of course a temporary solution, but I tried it and it works for me.
Waiting for something better, I hope it can help.
Gregory Brysbaert
-Message d'origine-
De: Thiago H de Paula Figueiredo [mailto:[EMAIL PROTECTED]
Envoyé: jeudi 16 août 2007 18:59
À: Tapestry users
Objet: Re: T5 developing with WTP and TOMCAT
On Thu, 16 Aug 2007 12:54:31 -0300, Denny [EMAIL PROTECTED] wrote:
Ok, now, I am using jettylauncher eclipse plugin to develop T5. I hope T5
can fix the problem about working with tomcat. There are many people
using tomcat for develop and product.
It's a Tomcat issue, not a Tapestry one. Howard explains the problem here:
http://tapestryjava.blogspot.com/2007/02/fighting-with-tomcat.html
--
Thiago H. de Paula Figueiredo
Desenvolvedor, Instrutor e Consultor de Tecnologia
Eteg Tecnologia da Informação Ltda.
http://www.eteg.com.br
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
Best regards,
Renat Zubairov
Re: T5 developing with WTP and TOMCAT
Ok, now, I am using jettylauncher eclipse plugin to develop T5. I hope T5 can fix the problem about working with tomcat. There are many people using tomcat for develop and product. On 8/15/07, Denny deng [EMAIL PROTECTED] wrote: Hi, I develop with WTP and TOMCAT. If I set the tomcat don't auto-reload, tapestry5 can take the changes of html template, while it can't take the chages of page class. It make the hot code replace failed. However, If I enable tomcat auto-reload. tapestry can take both html template and page class changes. But, it will cause tomcat reload the context. It's very slow, and after some times, it will cause tomcat out of memory. I know using Jetty servlet container will be fine. But I like developing with eclipse WTP. So I like the way of T3, T4, just add a java system property. -Dorg.apache.tapestry.disable-caching=true. It would be fine. just a bit slow while reload the page. -- View this message in context: http://www.nabble.com/T5-developing-with-WTP-and-TOMCAT-tf4273924.html#a12164566 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Regards Denny Site: http://dengyin2000.javaeye.com
Re: T5 developing with WTP and TOMCAT
I use Tomcat 5.5.23 and WTP for development. My context probably reloads 200-400 times a day. Only when I am making changes to web.xml/context.xml, log4j.properties, hibernate xmls do I need to stop and then start the server again. I have never run into a memory issue, although if I run modules directly from workspace the temp directory under my workspace/.metadata//server-core can get hosed sometimes. I've had more reliability running straight from the Tomcat container, with everything initialized through WTP. On 8/16/07, Denny [EMAIL PROTECTED] wrote: Ok, now, I am using jettylauncher eclipse plugin to develop T5. I hope T5 can fix the problem about working with tomcat. There are many people using tomcat for develop and product. On 8/15/07, Denny deng [EMAIL PROTECTED] wrote: Hi, I develop with WTP and TOMCAT. If I set the tomcat don't auto-reload, tapestry5 can take the changes of html template, while it can't take the chages of page class. It make the hot code replace failed. However, If I enable tomcat auto-reload. tapestry can take both html template and page class changes. But, it will cause tomcat reload the context. It's very slow, and after some times, it will cause tomcat out of memory. I know using Jetty servlet container will be fine. But I like developing with eclipse WTP. So I like the way of T3, T4, just add a java system property. -Dorg.apache.tapestry.disable-caching=true. It would be fine. just a bit slow while reload the page. -- View this message in context: http://www.nabble.com/T5-developing-with-WTP-and-TOMCAT-tf4273924.html#a12164566 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Regards Denny Site: http://dengyin2000.javaeye.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: T5 developing with WTP and TOMCAT
On Thu, 16 Aug 2007 12:54:31 -0300, Denny [EMAIL PROTECTED] wrote: Ok, now, I am using jettylauncher eclipse plugin to develop T5. I hope T5 can fix the problem about working with tomcat. There are many people using tomcat for develop and product. It's a Tomcat issue, not a Tapestry one. Howard explains the problem here: http://tapestryjava.blogspot.com/2007/02/fighting-with-tomcat.html -- Thiago H. de Paula Figueiredo Desenvolvedor, Instrutor e Consultor de Tecnologia Eteg Tecnologia da Informação Ltda. http://www.eteg.com.br - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
T5 developing with WTP and TOMCAT
Hi, I develop with WTP and TOMCAT. If I set the tomcat don't auto-reload, tapestry5 can take the changes of html template, while it can't take the chages of page class. It make the hot code replace failed. However, If I enable tomcat auto-reload. tapestry can take both html template and page class changes. But, it will cause tomcat reload the context. It's very slow, and after some times, it will cause tomcat out of memory. I know using Jetty servlet container will be fine. But I like developing with eclipse WTP. So I like the way of T3, T4, just add a java system property. -Dorg.apache.tapestry.disable-caching=true. It would be fine. just a bit slow while reload the page. -- View this message in context: http://www.nabble.com/T5-developing-with-WTP-and-TOMCAT-tf4273924.html#a12164566 Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
T5 developing with WTP and TOMCAT
Hi, I develop with WTP and TOMCAT. If I set the tomcat don't auto-reload, tapestry5 can take the changes of html template, while it can't take the chages of page class. It make the hot code replace failed. However, If I enable tomcat auto-reload. tapestry can take both html template and page class changes. But, it will cause tomcat reload the context. It's very slow, and after some times, it will cause tomcat out of memory. I know using Jetty servlet container will be fine. But I like developing with eclipse WTP. So I like the way of T3, T4, just add a java system property. - Dorg.apache.tapestry.disable-caching=true. It would be fine. just a bit slow while reload the page. -- Regards Denny Site: http://dengyin2000.javaeye.com
