Re: Problem with get ROOT context in servlet on tomcat 8.0.30 (jdk 1.7.0_79)

[Tomasz Macnar]

Thanks for answer.



In tomcat 6 when i put this configuration to server.xml

<Context path="" docBase="${catalina.base}/webapps/ROOT" crossContext="true" />



Pozdrawiam,
Tomasz Macnar

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mob. +48 694 464 934

W dniu 2015-12-31 o 10:09, Mark Thomas pisze:

I understand that application deploy order is the key to get context to deployed applicaitons (when application isn't deployed i can't get it context - it is clear). But ROOT application is deployed before app1, but i can't get ROOT context from app1. *Is it in tomcat 8 possible to get ROOT context from other application (in servlet) ? *If yes, coud tou give me an simple example ? i have returned ROOT application context. The same code work fine in tomcat 6.

On 31/12/2015 07:40, Tomasz Macnar wrote:

Hi,

I have problem with get ROOT servlet context from other application (on
the same server) in tomcat 8.0.30.
My code look this:

public class TestServlet extends HttpServlet {

     @Override
     public void init() throws ServletException {

         ServletContext servletContext = getServletContext();

         System.out.println("Servlet START: " +
servletContext.getContextPath());

         String[] contextTab = { "/", "/app1", "/app2" };

         for (String con : contextTab) {
             System.out.println("Context " + con + " : " +
servletContext.getContext(con));
         }
     }
}

This servlet I have in app1 and app2 with
<load-on-startup>1<load-on-startup>.

And in context "/" always I have null. In server.xml i have configuration:

<Context path="" docBase="${catalina.base}/webapps/ROOT"
crossContext="true" />
<Context path="/app1" docBase="${catalina.base}/webapps/app1"
crossContext="true" />
<Context path="/app2" docBase="${catalina.base}/webapps/app2"
crossContext="true" />

And the output is:
Servlet START: /app1
Context / : null
Context /app1 : null
Context /app2 : null

Servlet START: /app2
Context / : null
Context /app1 : org.apache.catalina.core.ApplicationContextFacade@8c6fb37
Context /app2 : null


I debug source of tomcat and find, that ROOT context (with empty "path"
in configuration server.xml) is added to ContainerBase class (HashMap
name children) in key "", but I suppose it should add ROOT context with
key "/".

No.

Please tell me if i have wrong configuration or other thing ?

The results above are giving you a big hint. app1 can't see any other
apps, but app2 can see app1 yet they are using exactly the same code.

Think about the order in which applications start and when the above
code runs.

Mark


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