Re: [Classpath] - Ordering issue

2020-01-31 Thread Christopher Schultz 
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Xavier,

On 1/30/20 5:00 AM, Xavier (Apache) wrote:
> 
>> On 30 Jan 2020, at 00:09, Christopher Schultz
>>  wrote:
>> 
> Xavier,
> 
> On 1/29/20 3:23 PM, Xavier (Apache) wrote:
 Hello Tomcat list,
 
 I’m struggling with a classpath problem. I have a webapp
 deployed under Tomcat. I have setup multiple tests (3 to be
 exact). They are all running 9.0.20, one under macOS, and the
 other 2 under Debian (same version for both). My app requires
 the jar lib to be loaded in a specific order. What I was able
 to gather so far is that I should do that customisation in
 myapp/WEB-INF/context.xml (it looks like I don’t need to tell
 Tomcat to look for that file)
 
 I’m looking for some sample code to better understand how to
 do it.
 
 So far I tried
 
  >>> docBase="\webapps\CloudManager"> >>> className="org.apache.catalina.loader.VirtualWebappLoader"/>
  xx yy ... 
 
 xx and yy are jar files in
 myapp/WEB-INF/lib/xx.jar
 
 but without any luck.
 
 I’m probably missing something obvious, but I just can’t find
 it.
> 
> Tomcat has no facility to force the loading of specific JARs in a 
> specific order. There has been no consensus that e.g. "alphabetic" 
> ordering should be enforced. There is no (servlet) spec-defined
> order, either.
> 
> If you have some special libraries that must be loaded before
> others (rather than a complete and total ordering), you can use
> the [1] facility to establish a directory where some 
> libraries are loaded first. I suppose you could use many
> PreResources, in order, to achieve a total ordering, but it will be
> a lot of typing.
> 
> The VirtualWebappLoader has been deprecated for a long time. I
> can't even find the class in any currently-supported branch of
> Tomcat.
> 
> -chris
> 
> [1] 
> http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html#Nested_C
om
> 
>
> 
ponents
>> 
>> -
>>
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> 
> Thanks for the pointers Christopher.
> 
> Here’s what I have so far, but I don’t understand why it doesn’t
> work (I get a java.lang.ClassNotFoundException for a class that is
> in the prelib jars)
> 
> -I added a directory mywebapp/WEB-INF/prelib with all the jars that
> should be loaded first (the ones that should be loaded after are in
> the usual mywebapp/WEB-INF/lib directory) 
> -mywebapp/WEB-INF/context.xml contains
> 
>
>  className="org.apache.catalina.webresources.DirResourceSet"
> base=“/WEB-INF/prelib" webAppMount="/WEB-INF/lib" />

The "base" needs to be a fully-qualified path. I assume you haven't
placed your files in /WEB-INF/prelib, but instead have them in
"/home/tomcat/webapps/yourwebapp/WEB-INF/prelib" or something similar.
It is not relative to the web application's "root".

This also means that it can't be loaded from within a WAR file. There
are other ResourceSet implementations that *may* work for reading
files our of a WAR file.

- -chris
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Re: [Classpath] - Ordering issue

2020-01-31 Thread Xavier (Apache) 


> On 30 Jan 2020, at 11:00, Xavier (Apache)  wrote:
> 
>> 
>> On 30 Jan 2020, at 00:09, Christopher Schultz > > wrote:
>> 
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA256
>> 
>> Xavier,
>> 
>> On 1/29/20 3:23 PM, Xavier (Apache) wrote:
>>> Hello Tomcat list,
>>> 
>>> I’m struggling with a classpath problem. I have a webapp deployed
>>> under Tomcat. I have setup multiple tests (3 to be exact). They are
>>> all running 9.0.20, one under macOS, and the other 2 under Debian
>>> (same version for both). My app requires the jar lib to be loaded
>>> in a specific order. What I was able to gather so far is that I
>>> should do that customisation in myapp/WEB-INF/context.xml (it looks
>>> like I don’t need to tell Tomcat to look for that file)
>>> 
>>> I’m looking for some sample code to better understand how to do
>>> it.
>>> 
>>> So far I tried
>>> 
>>>  >> docBase="\webapps\CloudManager"> >> className="org.apache.catalina.loader.VirtualWebappLoader"/> 
>>> xx yy ... 
>>> 
>>> xx and yy are jar files in myapp/WEB-INF/lib/xx.jar
>>> 
>>> but without any luck.
>>> 
>>> I’m probably missing something obvious, but I just can’t find it.
>> 
>> Tomcat has no facility to force the loading of specific JARs in a
>> specific order. There has been no consensus that e.g. "alphabetic"
>> ordering should be enforced. There is no (servlet) spec-defined order,
>> either.
>> 
>> If you have some special libraries that must be loaded before others
>> (rather than a complete and total ordering), you can use the
>> [1] facility to establish a directory where some
>> libraries are loaded first. I suppose you could use many PreResources,
>> in order, to achieve a total ordering, but it will be a lot of typing.
>> 
>> The VirtualWebappLoader has been deprecated for a long time. I can't
>> even find the class in any currently-supported branch of Tomcat.
>> 
>> - -chris
>> 
>> [1]
>> http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html#Nested_Com 
>>  
>> > >
>> ponents
>> -BEGIN PGP SIGNATURE-
>> Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ 
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>>  
>> > >
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>>  > >
> 
> Thanks for the pointers Christopher.
> 
> Here’s what I have so far, but I don’t understand why it doesn’t work (I get 
> a java.lang.ClassNotFoundException for a class that is in the prelib jars)
> 
> -I added a directory mywebapp/WEB-INF/prelib with all the jars that should be 
> loaded first (the ones that should be loaded after are in the usual 
> mywebapp/WEB-INF/lib directory)
> -mywebapp/WEB-INF/context.xml contains
> 
> 
> 
>   
>className="org.apache.catalina.webresources.DirResourceSet" 
> base=“/WEB-INF/prelib" webAppMount="/WEB-INF/lib" />
>   
> 
> -I also tried with an absolute path for “base” without success (also I’d 
> really need a path relative to the webapp or at least the Tomcat 
> installation, is base=$CATALINA_BASE/webapps/mywebapp/WEB-INF/prelib” 
> correct?)
> 
> Any idea about what I’m doing wrong?
> 
> Thanks a lot,
> 
> Xavier


I’m still struggling with this context.xml file.
So far, it doesn’t load what is in the “prelib” folder, even if I put an 
absolute path.

Anyone with a working sample? (ideally with a path relative to either Tomcat or 
the webapp)

Thanks,

Xavier

Re: [Classpath] - Ordering issue

2020-01-30 Thread Xavier (Apache) 

> On 30 Jan 2020, at 00:09, Christopher Schultz  
> wrote:
> 
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA256
> 
> Xavier,
> 
> On 1/29/20 3:23 PM, Xavier (Apache) wrote:
>> Hello Tomcat list,
>> 
>> I’m struggling with a classpath problem. I have a webapp deployed
>> under Tomcat. I have setup multiple tests (3 to be exact). They are
>> all running 9.0.20, one under macOS, and the other 2 under Debian
>> (same version for both). My app requires the jar lib to be loaded
>> in a specific order. What I was able to gather so far is that I
>> should do that customisation in myapp/WEB-INF/context.xml (it looks
>> like I don’t need to tell Tomcat to look for that file)
>> 
>> I’m looking for some sample code to better understand how to do
>> it.
>> 
>> So far I tried
>> 
>>  > docBase="\webapps\CloudManager"> > className="org.apache.catalina.loader.VirtualWebappLoader"/> 
>> xx yy ... 
>> 
>> xx and yy are jar files in myapp/WEB-INF/lib/xx.jar
>> 
>> but without any luck.
>> 
>> I’m probably missing something obvious, but I just can’t find it.
> 
> Tomcat has no facility to force the loading of specific JARs in a
> specific order. There has been no consensus that e.g. "alphabetic"
> ordering should be enforced. There is no (servlet) spec-defined order,
> either.
> 
> If you have some special libraries that must be loaded before others
> (rather than a complete and total ordering), you can use the
> [1] facility to establish a directory where some
> libraries are loaded first. I suppose you could use many PreResources,
> in order, to achieve a total ordering, but it will be a lot of typing.
> 
> The VirtualWebappLoader has been deprecated for a long time. I can't
> even find the class in any currently-supported branch of Tomcat.
> 
> - -chris
> 
> [1]
> http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html#Nested_Com 
> 
> ponents
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> 

Thanks for the pointers Christopher.

Here’s what I have so far, but I don’t understand why it doesn’t work (I get a 
java.lang.ClassNotFoundException for a class that is in the prelib jars)

-I added a directory mywebapp/WEB-INF/prelib with all the jars that should be 
loaded first (the ones that should be loaded after are in the usual 
mywebapp/WEB-INF/lib directory)
-mywebapp/WEB-INF/context.xml contains






 
-I also tried with an absolute path for “base” without success (also I’d really 
need a path relative to the webapp or at least the Tomcat installation, is 
base=$CATALINA_BASE/webapps/mywebapp/WEB-INF/prelib” correct?)

Any idea about what I’m doing wrong?

Thanks a lot,

Xavier

Re: [Classpath] - Ordering issue

2020-01-29 Thread Christopher Schultz 
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Hash: SHA256

Xavier,

On 1/29/20 3:23 PM, Xavier (Apache) wrote:
> Hello Tomcat list,
> 
> I’m struggling with a classpath problem. I have a webapp deployed
> under Tomcat. I have setup multiple tests (3 to be exact). They are
> all running 9.0.20, one under macOS, and the other 2 under Debian
> (same version for both). My app requires the jar lib to be loaded
> in a specific order. What I was able to gather so far is that I
> should do that customisation in myapp/WEB-INF/context.xml (it looks
> like I don’t need to tell Tomcat to look for that file)
> 
> I’m looking for some sample code to better understand how to do
> it.
> 
> So far I tried
> 
>   docBase="\webapps\CloudManager">  className="org.apache.catalina.loader.VirtualWebappLoader"/> 
> xx yy ... 
> 
> xx and yy are jar files in myapp/WEB-INF/lib/xx.jar
> 
> but without any luck.
> 
> I’m probably missing something obvious, but I just can’t find it.

Tomcat has no facility to force the loading of specific JARs in a
specific order. There has been no consensus that e.g. "alphabetic"
ordering should be enforced. There is no (servlet) spec-defined order,
either.

If you have some special libraries that must be loaded before others
(rather than a complete and total ordering), you can use the
[1] facility to establish a directory where some
libraries are loaded first. I suppose you could use many PreResources,
in order, to achieve a total ordering, but it will be a lot of typing.

The VirtualWebappLoader has been deprecated for a long time. I can't
even find the class in any currently-supported branch of Tomcat.

- -chris

[1]
http://tomcat.apache.org/tomcat-9.0-doc/config/resources.html#Nested_Com
ponents
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[Classpath] - Ordering issue

2020-01-29 Thread Xavier (Apache) 
Hello Tomcat list,

I’m struggling with a classpath problem.
I have a webapp deployed under Tomcat. I have setup multiple tests (3 to be 
exact). They are all running 9.0.20, one under macOS, and the other 2 under 
Debian (same version for both).
My app requires the jar lib to be loaded in a specific order.
What I was able to gather so far is that I should do that customisation in 
myapp/WEB-INF/context.xml (it looks like I don’t need to tell Tomcat to look 
for that file)

I’m looking for some sample code to better understand how to do it.

So far I tried



  
  xx
  yy
...


xx and yy are jar files in myapp/WEB-INF/lib/xx.jar

but without any luck.

I’m probably missing something obvious, but I just can’t find it.


Thanks for your help,

Xavier
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