Hi All,
I have embedded Tomcat 5.0.19 in my application, which is a simple web based database application in servlets. In Embedded Tomcat we don't have server.xml.
Reference:
http://www.vsj.co.uk/articles/display.asp?id=319
I am trying to create JNDI Context to connect to my database.
My configuration file is like this:
<naming>
<context >
<resource name="jdbc/myDS" type="javax.sql.DataSource" >
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFact ory</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>net.sourceforge.jtds.jdbc.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:jtds:sqlserver://SQLServer:1433;databaseName=myDB;</value>
</parameter>
<parameter>
<name>username</name>
<value>sa</value>
</parameter>
<parameter>
<name>password</name>
<value>sa</value>
</parameter>
</resource>
</context>
</naming>
I have put this config file in the root directory and called thru the following method.
XmlConfigurator.loadConfiguration(getClass().getRe sourceAsStream("/myConfig.xml"));
Ref:
http://directory.apache.org/subproje...ing/using.html
I have written a class which starts the embedded tomcat and calls the above method.
The following is the output of tomcat:
Apr 15, 2005 3:19:00 PM org.apache.catalina.startup.Embedded start
INFO: Starting tomcat server
Apr 15, 2005 3:19:01 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.0.19
Apr 15, 2005 3:19:01 PM org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
Apr 15, 2005 3:19:01 PM org.apache.struts.util.PropertyMessageResources <init>
INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=tru
e
Apr 15, 2005 3:19:01 PM org.apache.struts.util.PropertyMessageResources <init>
INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNul
l=true
Apr 15, 2005 3:19:02 PM org.apache.struts.util.PropertyMessageResources <init>
INFO: Initializing, config='view.ApplicationResources', returnNull=true
Apr 15, 2005 3:19:02 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on port 9889
Apr 15, 2005 3:19:02 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on port 9889
I have written another class which does the context lookup function and creates the Connection Object like this:
public Connection getConnection()
{
Context ctx=new InitialContext();
Context jdbcCtx = (Context)ctx.lookup("jdbc");
DataSource datasource=(DataSource)jdbcCtx.lookup("myDS");
return datasource.getConnection();
}
but every time my web application calls this function to create a new connection it throws:
javax.naming.NameNotFoundException: Name jdbc is not bound in this Context
at org.apache.naming.NamingContext.lookup(NamingConte xt.java:815)
at org.apache.naming.NamingContext.lookup(NamingConte xt.java:198)
at org.apache.naming.SelectorContext.lookup(SelectorC ontext.java:183)
at javax.naming.InitialContext.lookup(InitialContext. java:347)
at view.DatabaseConnection.getConnection(DatabaseConn ection.java:109)
at view.Admin_LoginValidation.doPost(Admin_LoginValid ation.java:42)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(Appl
icationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationF
ilterChain.java:204)
at org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperV
alve.java:257)
at org.apache.catalina.core.StandardValveContext.invo keNext(StandardValv
eContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.jav
a:567)
at org.apache.catalina.core.StandardContextValve.invo keInternal(Standard
ContextValve.java:245)
at org.apache.catalina.core.StandardContextValve.invo ke(StandardContextV
alve.java:199)
at org.apache.catalina.core.StandardValveContext.invo keNext(StandardValv
eContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.jav
a:567)
at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.j
ava:184)
at org.apache.catalina.core.StandardValveContext.invo keNext(StandardValv
eContext.java:151)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.j
ava:164)
at org.apache.catalina.core.StandardValveContext.invo keNext(StandardValv
eContext.java:149)
at org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.jav
a:567)
at org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineVal
ve.java:156)
at org.apache.catalina.core.StandardValveContext.invo keNext(StandardValv
eContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(S tandardPipeline.jav
a:567)
at org.apache.catalina.core.ContainerBase.invoke(Cont ainerBase.java:972)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(Co yoteAdapter.java:20
6)
at org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java
:833)
at org.apache.coyote.http11.Http11Protocol$Http11Conn ectionHandler.proce
ssConnection(Http11Protocol.java:732)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(P oolTcpEndpoint.java
:619)
at org.apache.tomcat.util.threads.ThreadPool$ControlR unnable.run(ThreadP
ool.java:688)
at java.lang.Thread.run(Thread.java:534)
java.lang.NullPointerException
when I tried Context lookup in the same class which starts Tomcat, there is no problem: it gets the Name jdbc/myDB. How to make the Context Global.
Please help me out to solve this problem.
Thanks in Advance,
Pretty
JNDI setup in Embedded Tomcat 5.0.19
