Hi Grzegorz,
Thank you for your response.
I have gone through your explanation; I have seen that "/" is overriding the
default servlet. Thank you for letting me know.
But we had that web.xml configuration from last several years below is the
web.xml which was being used from older karaf versions (before 4.4.1).
<servlet>
<servlet-name>helloboard</servlet-name>
<servlet-class>com.console.helloboard.HelloboardServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>helloboard</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
Previously HelloboardServlet used to take in all the requests and process them,
below is the code block which is used to be executed.
public class HelloboardServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
if (request.getServletPath().equals("/")) {
response.sendRedirect("views/welcome.jsp");
} else if (request.getServletPath().startsWith("/resources/")){
if(request.getServletPath().endsWith(".css")) {
response.setContentType("text/css");
} else if (request.getServletPath().endsWith(".js")) {
response.setContentType("text/javascript");
}
RequestDispatcher rd =
getServletContext().getNamedDispatcher("default");
rd.include(request, response);
}
}
}
I want to know why it was able to create a default RequestDispatcher back then
and why not now? are there any changes in the implementation as part of the
upgrades, if yes can I get some information of what has been modified.
As per your directions I have changed the web.xml servlet mapping from / to /*,
now I'm able to create the default servlet but the above code block will not be
working because I have changed the url-pattern from / to /* all the request
objects are containing servletPath as "" (empty string). Which will break the
existing flow.
I'm sorry that I cannot share the WAB and can give any further inputs regarding
this issue.
Thanks,
Prashanth Ettaboina.
From: Prashanth Ettaboina
Sent: 15 November 2022 20:03
To: '[email protected]' <[email protected]>; '[email protected]'
<[email protected]>; '[email protected]' <[email protected]>
Subject: RE: Unable to create default RequestDispatcher
Hi Grzegorz,
I'm generating a WAR file of the bundle(which will have the web application).
Adding the war file in the feature.xml and installing it in the karaf as a kar
file.
<!-- Server Console Bundles -->
<bundle
start-level="95">mvn:com.server.console/helloboard/${project.version}/war</bundle>
karaf@root()> kar: install file :filepath*** snapshot.kar
below are the logs from karaf which are generated while I installed the kar
file.
2022-11-15T19:19:11.401+0530 CEF:1 | org.apache.karaf.kar.core | 4.4.1 | INFO
| ID=168 THR=0.0-SNAPSHOT.kar CAT=KarServiceImpl MSG=Added
feature repository
'mvn:com.server.kars/example-console/51.0.0-SNAPSHOT/xml/features'
2022-11-15T19:19:11.403+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=0.0-SNAPSHOT.kar CAT=FeaturesServiceImpl
MSG=Adding features: example-console/[51.0.0.SNAPSHOT,51.0.0.SNAPSHOT]
2022-11-15T19:19:15.041+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=tures-3-thread-1 CAT=FeaturesServiceImpl
MSG=Changes to perform:
2022-11-15T19:19:15.041+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=tures-3-thread-1 CAT=FeaturesServiceImpl MSG=
Region: root
2022-11-15T19:19:15.042+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=tures-3-thread-1 CAT=FeaturesServiceImpl MSG=
Bundles to install:
2022-11-15T19:19:15.042+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=tures-3-thread-1 CAT=FeaturesServiceImpl MSG=
mvn:com.server.console/helloboard/51.0.0-SNAPSHOT/war
2022-11-15T19:19:20.621+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=tures-3-thread-1 CAT=FeaturesServiceImpl MSG=
helloboard/51.0.0.SNAPSHOT
2022-11-15T19:19:20.634+0530 CEF:1 | org.ops4j.pax.web.pax-web-extender-war |
8.0.6 | INFO | ID=269 THR=ender-1-thread-1 CAT=BundleWebApplication
MSG=Configuring Web Application "/helloboard" for bundle
helloboard/51.0.0.SNAPSHOT
2022-11-15T19:19:20.635+0530 CEF:1 | org.apache.karaf.features.core | 4.4.1 |
INFO | ID=19 THR=tures-3-thread-1 CAT=FeaturesServiceImpl
MSG=Done.
2022-11-15T19:19:32.512+0530 CEF:1 | org.ops4j.pax.web.pax-web-runtime | 8.0.6
| INFO | ID=272 THR=ender-1-thread-1 CAT=StoppableHttpServiceFactory
MSG=Binding HTTP Service for bundle: [helloboard [318]]
2022-11-15T19:19:32.514+0530 CEF:1 | org.ops4j.pax.web.pax-web-extender-war |
8.0.6 | INFO | ID=269 THR=ender-1-thread-1 CAT=BundleWebApplication
MSG=Allocated context for /helloboard:
OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,}
2022-11-15T19:19:32.520+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerController
MSG=Receiving Batch{"Deployment of Web Application "/helloboard" for bundle
helloboard/51.0.0.SNAPSHOT", size=24}
2022-11-15T19:19:32.520+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Creating new Jetty context for
ServletContextModel{id=ServletContextModel-234,contextPath='/helloboard'}
2022-11-15T19:19:32.521+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding
OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,context=WebContainerContextWrapper{bundle=helloboard
[318],contextId='/helloboard',delegate=org.ops4j.pax.web.extender.war.internal.WebApplicationHelper@1641e385}}
to
o.o.p.w.s.j.i.PaxWebServletContextHandler@6ae38bdd{/helloboard,null,STOPPED}<mailto:o.o.p.w.s.j.i.PaxWebServletContextHandler@6ae38bdd%7b/dashboard,null,STOPPED%7d>
2022-11-15T19:19:32.522+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Changing default OSGi context model for
o.o.p.w.s.j.i.PaxWebServletContextHandler@6ae38bdd{/helloboard,null,STOPPED}<mailto:o.o.p.w.s.j.i.PaxWebServletContextHandler@6ae38bdd%7b/dashboard,null,STOPPED%7d>
2022-11-15T19:19:32.522+0530 CEF:1 | org.ops4j.pax.web.pax-web-spi | 8.0.6 |
INFO | ID=273 THR=ploy /helloboard) CAT=OsgiServletContext
MSG=Registering
OsgiServletContext{model=OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,context=WebContainerContextWrapper{bundle=helloboard
[318],contextId='/helloboard',delegate=org.ops4j.pax.web.extender.war.internal.WebApplicationHelper@1641e385}}}
as OSGi service for "/helloboard" context path
2022-11-15T19:19:32.523+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Configuring metadata of
OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,context=WebContainerContextWrapper{bundle=helloboard
[318],contextId='/helloboard',delegate=org.ops4j.pax.web.extender.war.internal.WebApplicationHelper@1641e385}}
2022-11-15T19:19:32.523+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Configuring MIME and Locale Encoding mapping of
OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,context=WebContainerContextWrapper{bundle=helloboard
[318],contextId='/helloboard',delegate=org.ops4j.pax.web.extender.war.internal.WebApplicationHelper@1641e385}}
2022-11-15T19:19:32.524+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding servlet
ServletModel{id=ServletModel-235,name='audit',urlPatterns=[/uem/data/audit/*,
/data/audit/*],servletClass=class
com..gcs.console.helloboard.AuditLogServlet,contexts=null}
2022-11-15T19:19:32.524+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding servlet
ServletModel{id=ServletModel-236,name='jsp',urlPatterns=[*.jspx,
*.jsp],servletClass=class
org.ops4j.pax.web.jsp.JspServlet,contexts=[{WAB,OCM-233,/helloboard,/helloboard}]}
2022-11-15T19:19:32.525+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding servlet
ServletModel{id=ServletModel-237,name='login-typeCheck',urlPatterns=[/loginType/*],servletClass=class
com..gcs.console.helloboard.LoginTypeCheckServlet,contexts=null}
2022-11-15T19:19:32.525+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding servlet
ServletModel{id=ServletModel-238,name='repository',urlPatterns=[/data/docs/*,
/uem/data/docs/*],servletClass=class
com..gcs.console.helloboard.RepositoryServlet,contexts=null}
2022-11-15T19:19:32.525+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding servlet
ServletModel{id=ServletModel-239,name='helloboard',urlPatterns=[/],servletClass=class
com..gcs.console.helloboard.HelloboardServlet,contexts=null}
2022-11-15T19:19:32.525+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Adding servlet
ServletModel{id=ServletModel-240,name='basic-auth',urlPatterns=[/login/*],servletClass=class
com..gcs.console.helloboard.BasicAuthServlet,contexts=null}
2022-11-15T19:19:32.525+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Changing filter configuration for context /helloboard
2022-11-15T19:19:32.526+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Reconfiguration of welcome files for all resource servlets in context
"OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,context=WebContainerContextWrapper{bundle=helloboard
[318],contextId='/helloboard',delegate=org.ops4j.pax.web.extender.war.internal.WebApplicationHelper@1641e385}}"
2022-11-15T19:19:32.526+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Changing error page configuration for context /helloboard
2022-11-15T19:19:32.526+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerWrapper
MSG=Starting Jetty context "/helloboard" with default Osgi Context
OsgiContextModel{WAB,id=OCM-233,name='/helloboard',path='/helloboard',bundle=helloboard,context=WebContainerContextWrapper{bundle=helloboard
[318],contextId='/helloboard',delegate=org.ops4j.pax.web.extender.war.internal.WebApplicationHelper@1641e385}}
2022-11-15T19:19:32.528+0530 CEF:1 | org.ops4j.pax.web.pax-web-jsp | 8.0.6 |
INFO | ID=271 THR=ploy /helloboard) CAT=PaxWebTldScanner
MSG=Searching for TLDs in pax-web-jsp bundle
2022-11-15T19:19:32.639+0530 CEF:1 | org.ops4j.pax.web.pax-web-jsp | 8.0.6 |
INFO | ID=271 THR=ploy /helloboard) CAT=PaxWebTldScanner
MSG=Searching for TLDs in context configuration (web.xml)
2022-11-15T19:19:32.639+0530 CEF:1 | org.ops4j.pax.web.pax-web-jsp | 8.0.6 |
INFO | ID=271 THR=ploy /helloboard) CAT=PaxWebTldScanner
MSG=Searching for TLDs in /WEB-INF/
2022-11-15T19:19:32.640+0530 CEF:1 | org.ops4j.pax.web.pax-web-jsp | 8.0.6 |
INFO | ID=271 THR=ploy /helloboard) CAT=PaxWebTldScanner
MSG=Searching for TLDs in bundle helloboard [318]
2022-11-15T19:19:32.828+0530 CEF:1 | org.ops4j.pax.web.pax-web-runtime | 8.0.6
| INFO | ID=272 THR=ploy /helloboard) CAT=HttpServiceEnabled
MSG=Registering
EventListenerModel{id=EventListenerModel-252,listener='ch.qos.logback.classic.servlet.LogbackServletContextListener@70476be6',contexts=[{WAB,OCM-233,/helloboard,/helloboard}]}
2022-11-15T19:19:32.828+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerController
MSG=Receiving Batch{"Registration of
EventListenerModel{id=EventListenerModel-252,listener='ch.qos.logback.classic.servlet.LogbackServletContextListener@70476be6',contexts=[{WAB,OCM-233,/helloboard,/helloboard}]}",
size=1}
2022-11-15T19:19:32.830+0530 CEF:1 | org.ops4j.pax.web.pax-web-runtime | 8.0.6
| INFO | ID=272 THR=ploy /helloboard) CAT=HttpServiceEnabled
MSG=Registering
EventListenerModel{id=EventListenerModel-251,listener='org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer$ContextDestroyListener@526531fa',contexts=[{WAB,OCM-233,/helloboard,/helloboard}]}
2022-11-15T19:19:32.831+0530 CEF:1 | org.ops4j.pax.web.pax-web-jetty | 8.0.6 |
INFO | ID=270 THR=ploy /helloboard) CAT=JettyServerController
MSG=Receiving Batch{"Registration of
EventListenerModel{id=EventListenerModel-251,listener='org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer$ContextDestroyListener@526531fa',contexts=[{WAB,OCM-233,/helloboard,/helloboard}]}",
size=1}
2022-11-15T19:19:32.834+0530 CEF:1 | org.eclipse.jetty.util | 9.4.48.v20220622
| INFO | ID=243 THR=ploy /helloboard) CAT=ContextHandler
MSG=Started
o.o.p.w.s.j.i.PaxWebServletContextHandler@6ae38bdd{ServerHelloboard,/helloboard,null,AVAILABLE}<mailto:o.o.p.w.s.j.i.PaxWebServletContextHandler@6ae38bdd%7bServerDashboard,/dashboard,null,AVAILABLE%7d>
From: Prashanth Ettaboina
Sent: 15 November 2022 16:28
To: '[email protected]'
<[email protected]<mailto:[email protected]>>;
'[email protected]' <[email protected]<mailto:[email protected]>>;
'[email protected]' <[email protected]<mailto:[email protected]>>
Subject: RE: Unable to create default RequestDispatcher
Hi Grzegorz,
I'm not registering the ExampleServlet anywhere, I'm configuring them in
web.xml.
In the web.xml we are giving the servlet and servlet mapping with url-pattern
and class path.
Thanks,
Prashanth Ettaboina.
From: Prashanth Ettaboina
Sent: 14 November 2022 19:11
To: [email protected]<mailto:[email protected]>;
[email protected]<mailto:[email protected]>;
[email protected]<mailto:[email protected]>
Subject: Unable to create default RequestDispatcher
Hi Team,
I have updated my KARAF version from 4.2.15 to 4.4.1 and Java from 8 to 11 in
my application.
Gone through the official Release notes and updated some dependencies as well.
Upgraded OSGI-Core from 6.0.0 to 8.0.0.
Upgraded osgi.compendium 5.0.0 to osgi.cmpn 7.0.0
Upgraded Jetty from 9.4.43.v20210629 to 9.4.46.v20220331.
Upgraded pax-web-spi from 4.3.4 to 7.2.11.
I'm using javax.servlet-api 3.1.0 version in my application.
I'm unable to create default RequestDispatcher.
Please check the below code lines.
public class ExampleServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
RequestDispatcher requestDispatcher =
getServletContext().getNamedDispatcher("default"); // get getServletContext()
is calling the method in GenericServlet.
requestDispatcher.include(request, response);
}
}
the above code used to work fine before the version upgrades but now I'm
getting the requestDispatcher as null.
Can anyone please look at it, let me know if I'm missing something.
Thanks,
Prashanth Ettaboina
