Hi Jose,
Hmmm... very strange.
Normally I would have said:
Seen that the implementation of init() is:
public void init(ServletConfig config) throws ServletException {
this.config = config;
this.init();
}
and that line 204 of servlet-api-4 is:
public ServletContext getServletContext() {
return getServletConfig().getServletContext();
}
and that:
public ServletConfig getServletConfig() {
return config;
}
my conclusion is that your InscribeServlet must somehow override the
init(ServletConfig) method and it must not do a super.init(config)...
However, the stack trace says:
> javax.servlet.GenericServlet.init(GenericServlet.java:256)
and line 256 is:
254 public void init(ServletConfig config) throws ServletException {
255 this.config = config;
256 this.init();
257 }
thus it means this.config = config must have been called... So you're
not overriding GenericServlet.init(ServletConfig) or if you do you are
correctly calling super.init(config)...
hmm....
Can you test that config is not null:
public void testPostMethod() throws ServletException
{
assertNotNull("aha config is null", config);
InscribeServlet inscribeServlet = new
InscribeServlet();
inscribeServlet.init(config);
}
Thanks
-Vincent
> -----Original Message-----
> From: Jose Alfonso Martinez [mailto:[EMAIL PROTECTED]
> Sent: 11 August 2003 19:43
> To: [EMAIL PROTECTED]
> Subject: calling getServletContext() in a servlet - how to??
>
> Hello,
>
> I am testing a servlet, just the init() method like this:
>
> public void testPostMethod() throws ServletException
> {
> InscribeServlet inscribeServlet = new
InscribeServlet();
> inscribeServlet.init(config);
> }
>
> I get a java.lang.NullPointerException when calling
getServletContext()...
>
> in the init() method, my servlet calls
getServletContext().getRealPath().
> I guess there is where the exception occurs. It could also be in a
call to
> get the DataSource via InitialContext. Attached is the stack trace and
the
> init() method of my Servlet.
>
> Does anyone knows what am I doing wrong???? thanks in advance.
>
> Jose
>
>
> Stack Trace
> ============
>
> test2:
> [junit] Running com.cevex.servlet.TestInscribeServlet
> [junit] Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 1.562
sec
> [junit] Testsuite: com.cevex.servlet.TestInscribeServlet
> [junit] Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 1.562
sec
>
> [junit] Testcase: testPostMethod took 1.514 sec
> [junit] Caused an ERROR
> [junit] null
> [junit] java.lang.NullPointerException
> [junit] at
>
javax.servlet.GenericServlet.getServletContext(GenericServlet.java:204)
> [junit] at com.cevex.servlet.InscribeServlet.init(Unknown
> Source)
> [junit] at
> javax.servlet.GenericServlet.init(GenericServlet.java:256)
> [junit] at
> com.cevex.servlet.TestInscribeServlet.testPostMethod(Unknown Source)
> [junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
> [junit] at
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:
> 39)
> [junit] at
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Im
> pl.java:25)
> [junit] at
>
org.apache.cactus.internal.server.ServerTestCaseDelegate.runServerTest(S
er
>
verTestCaseDelegate.java;org/apache/cactus/util/log/LogAspect.aj[1k]:214
)
> [junit] at
> org.apache.cactus.ServletTestCase.runTest(ServletTestCase.java:280)
> [junit] at
> org.apache.cactus.ServletTestCase.runBare(ServletTestCase.java:251)
> [junit] at
>
org.apache.cactus.server.AbstractWebTestCaller.doTest(AbstractWebTestCal
le
> r.java:156)
> [junit] at
>
org.apache.cactus.server.AbstractWebTestController.dispatch133_handleReq
ue
>
st(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.a
j[
> 1k]:130)
> [junit] at
>
org.apache.cactus.server.AbstractWebTestController.around133_handleReque
st
>
(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj[
1k
> ]:1158)
> [junit] at
>
org.apache.cactus.server.AbstractWebTestController.handleRequest(Abstrac
tW
> ebTestController.java;org/apache/cactus/util/log/LogAspect.aj[1k]:101)
> [junit] at
>
org.apache.cactus.server.ServletTestRedirector.dispatch160_doPost(Servle
tT
> estRedirector.java;org/apache/cactus/util/log/LogAspect.aj[1k]:125)
> [junit] at
>
org.apache.cactus.server.ServletTestRedirector.around160_doPost(ServletT
es
> tRedirector.java;org/apache/cactus/util/log/LogAspect.aj[1k]:1158)
> [junit] at
>
org.apache.cactus.server.ServletTestRedirector.doPost(ServletTestRedirec
to
> r.java;org/apache/cactus/util/log/LogAspect.aj[1k]:109)
> [junit] at
>
org.apache.cactus.server.ServletTestRedirector.dispatch159_doGet(Servlet
Te
> stRedirector.java;org/apache/cactus/util/log/LogAspect.aj[1k]:96)
> [junit] at
>
org.apache.cactus.server.ServletTestRedirector.around159_doGet(ServletTe
st
> Redirector.java;org/apache/cactus/util/log/LogAspect.aj[1k]:1158)
> [junit] at
>
org.apache.cactus.server.ServletTestRedirector.doGet(ServletTestRedirect
or
> .java;org/apache/cactus/util/log/LogAspect.aj[1k]:92)
> [junit] at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
> [junit] at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> [junit] at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
ti
> onFilterChain.java:247)
> [junit] at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
er
> Chain.java:193)
> [junit] at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.
> java:260)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:643)
> [junit] at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80
> )
> [junit] at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> [junit] at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.
> java:191)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:643)
> [junit] at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80
> )
> [junit] at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> [junit] at
>
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:241
5)
> [junit] at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:1
> 80)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:643)
> [junit] at
>
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherVa
lv
> e.java:170)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:641)
> [junit] at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:1
> 72)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:641)
> [junit] at
>
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509
)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:641)
> [junit] at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80
> )
> [junit] at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> [junit] at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
ja
> va:174)
> [junit] at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.i
nv
> okeNext(StandardPipeline.java:643)
> [junit] at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:4
80
> )
> [junit] at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> [junit] at
>
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
> [junit] at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:43
2)
> [junit] at
>
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
on
> nection(Http11Protocol.java:386)
> [junit] at
>
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:53
4)
> [junit] at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.j
> ava:530)
> [junit] at java.lang.Thread.run(Thread.java:536)
>
>
>
>
> And the init() method of my Servlet
> ===================================
> public void init() throws CevexServletException
> {
> try
> {
> // get the initial context
> Context initCtx = new InitialContext();
> Context envCtx = (Context) initCtx.lookup("java:comp/env");
>
> // get the datasource
> ds = (DataSource) envCtx.lookup("jdbc/cevexDB");
>
> /* something is worng with the mail session, check later */
> //session = (Session) envCtx.lookup("mail/Session");
>
> // initialize new mail seession
> Properties props = new Properties();
> props.put("mail.smtp.host", "localhost");
> Session session = Session.getDefaultInstance(props, null);
> session.setDebug(false);
>
> // Read email strings from files
> String realPath = getServletContext().getRealPath("/");
> mailInscripcionMasc = new CevexMail(session, realPath +
> getInitParameter("mailInscripcionMasc"));
> mailInscripcionFem = new CevexMail(session, realPath +
> getInitParameter("mailInscripcionFem"));
> mailInscripcionConInvitacionMasc = new CevexMail(session,
realPath +
>
> getInitParameter("mailInscripcionConInvitacionMasc"));
> mailInscripcionConInvitacionFem = new CevexMail(session,
realPath +
>
> getInitParameter("mailInscripcionConInvitacionFem"));
>
> } // end try
> .... catch statements
> }
>
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