javax.naming.NamingException: Cannot create resource instance
ushasagi
Have Some issue while refering resource parameter in Tomcat any help and suggesion will be appreciated.
Details for the samle code is given following. I had created jarfile which contains my bean class and factory class and i placed that in server\lib as well as common\lib
Server.xml file Contains
<?xml version='1.0' encoding='utf-8'?>
<Server>
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
<GlobalNamingResources>
<Environment name="simpleValue" type="java.lang.Integer" value="30"/>
<Resource auth="Container" name="MyResourceLink" type="com.ibm.resource.Config"/>
<Resource auth="Container" description="User database that can be updated and saved" name="UserDatabase" type="org.apache.catalina.UserDatabase"/>
<ResourceParams name="MyResourceLink">
<parameter>
<name>factory</name>
<value>com.ibm.resource.ConfigFactory</value>
</parameter>
<parameter>
<name>bar</name>
<value>23</value>
</parameter>
</ResourceParams>
<ResourceParams name="UserDatabase">
<parameter>
<name>factory</name>
<value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
</parameter>
<parameter>
<name>pathname</name>
<value>conf/tomcat-users.xml</value>
</parameter>
</ResourceParams>
</GlobalNamingResources>
<Service name="Catalina">
<Connector acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" port="8080" redirectPort="8443" maxSpareThreads="75" maxThreads="150" minSpareThreads="25">
</Connector>
<Connector port="8009" protocol="AJP/1.3" protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler" redirectPort="8443">
</Connector>
<Engine defaultHost="localhost" name="Catalina">
<Host appBase="webapps" name="localhost">
<Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_log." suffix=".txt" timestamp="true"/>
</Host>
<Logger className="org.apache.catalina.logger.FileLogger" prefix="catalina_log." suffix=".txt" timestamp="true"/>
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"/>
</Engine>
</Service>
</Server>
web.xml file Contains
<?xml version="1.0" encoding="UTF-8"?>
<web-app>
<display-name>Resource Refrence Sample</display-name>
<servlet>
<display-name>ShowContext</display-name>
<servlet-name>ShowContext</servlet-name>
<servlet-class>ShowContext</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ShowContext</servlet-name>
<url-pattern>/ShowContext</url-pattern>
</servlet-mapping>
<resource-env-ref>
<resource-env-ref-name>MyResourceLink</resource-env-ref-name>
<resource-env-ref-type>com.ibm.resource.Config</resource-env-ref-type>
</resource-env-ref>
<welcome-file-list>
<welcome-file>Test.jsp</welcome-file>
</welcome-file-list>
</web-app>
Servlet Contains
protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException {
// TODO Auto-generated method stub
try {
int i=1;
System.out.println("Initializing Initial Context");
Context initCtx = new InitialContext();
System.out.println("Initial Context Lookup");
Context envCtx = (Context) initCtx.lookup("java:comp/env");
System.out.println("Environment Context Lookup");
//Object object = envCtx.lookup("bar");
Object object = envCtx.lookup("MyResourceLink");
System.out.println("Casting Context Object To Context");
Config config = (Config) object;
System.out.println("Getting Map");
Map mp=(Map) config.getAttributes();
System.out.println("Getting Map Key Set");
Set mapkeyval=mp.keySet();
Iterator itr=mapkeyval.iterator();
while(itr.hasNext())
{
String keyVal=(String)itr.next();
String myVariable = (String) config.getAttribute(keyVal);
System.out.println("Variable No: "+i);
System.out.println("Variable Name: "+keyVal);
System.out.println("Variable Value: "+myVariable);
System.out.println("---------------------------------------------");
i=i+1;
}
} catch (Exception e) {System.out.println("Unable To Get Initial Context");e.printStackTrace(); }
}
Bean Class
package com.ibm.resource;
import java.util.HashMap;
import java.util.Map;
public class Config
{
private Map attributes = null;
public Config()
{
attributes = new HashMap();
}
protected void setAttribute(String attributeName, String attributeValue)
{
attributes.put(attributeName, attributeValue);
}
public Object getAttribute(String attributeName)
{
return attributes.get(attributeName);
}
public Map getAttributes()
{
return attributes;
}
public void setAttributes(Map attributes)
{
this.attributes=attributes;
}
}
Factory Class
package com.ibm.resource;
import java.util.Enumeration;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.RefAddr;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;
public class ConfigFactory implements ObjectFactory
{
private static Config config = null;
public Object getObjectInstance(Object object,Name name,Context nameCtx,Hashtable environment) throws NamingException
{
if(config == null)
{
config = new Config();
System.out.println("Converting Input Object Into Refrence");
Reference ref = (Reference) object;
System.out.println("Getting Address Enumeration From Refrence");
Enumeration addrs = ref.getAll();
System.out.println("Initializing Variables ");
RefAddr addr = null;
String entryName = null;
String value = null;
System.out.println("Going To Iterate Address Enumeration");
while (addrs.hasMoreElements())
{
addr = (RefAddr) addrs.nextElement();
System.out.println("Getting Type From RefAddr");
entryName = addr.getType();
System.out.println("Getting Contents");
value = (String) addr.getContent();
System.out.println("Setting Attribute");
config.setAttribute(entryName, value);
}
}
return config;
}
}
Error I Am Getting (Log File Containts)
Aug 27, 2007 5:14:46 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Aug 27, 2007 5:14:46 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 815 ms
Converting Input Object Into Refrence
Getting Address Enumeration From Refrence
Initializing Variables
Going To Iterate Address Enumeration
Getting Type From RefAddr
Getting Contents
Setting Attribute
Getting Type From RefAddr
Getting Contents
Setting Attribute
Getting Type From RefAddr
Getting Contents
Setting Attribute
Getting Type From RefAddr
Getting Contents
Setting Attribute
Aug 27, 2007 5:14:46 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Aug 27, 2007 5:14:46 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.0.28
Aug 27, 2007 5:14:46 PM org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
Aug 27, 2007 5:14:46 PM org.apache.catalina.core.StandardHost getDeployer
INFO: Create Host deployer for direct deployment ( non-jmx )
Aug 27, 2007 5:14:46 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\admin.xml
Aug 27, 2007 5:14:47 PM org.apache.struts.util.PropertyMessageResources <init>
INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true
Aug 27, 2007 5:14:47 PM org.apache.struts.util.PropertyMessageResources <init>
INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true
Aug 27, 2007 5:14:47 PM org.apache.struts.util.PropertyMessageResources <init>
INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\balancer.xml
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\jsp-examples.xml
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\manager.xml
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\ResRefSample.xml
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\ROOT.xml
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\servlets-examples.xml
Aug 27, 2007 5:14:47 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\tomcat-docs.xml
Aug 27, 2007 5:14:48 PM org.apache.catalina.core.StandardHostDeployer install
INFO: Processing Context configuration file URL file:C:\ApacheTomcat5.0\conf\Catalina\localhost\webdav.xml
Aug 27, 2007 5:14:48 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Aug 27, 2007 5:14:48 PM org.apache.jk.common.ChannelSocket init
INFO: JK2: ajp13 listening on /0.0.0.0:8009
Aug 27, 2007 5:14:48 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/31 config=C:\ApacheTomcat5.0\conf\jk2.properties
Aug 27, 2007 5:14:48 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1927 ms
Initializing Initial Context
Initial Context Lookup
Environment Context Lookup
Unable To Get Initial Context
javax.naming.NamingException: Cannot create resource instance
at org.apache.naming.factory.ResourceEnvFactory.getObjectInstance(ResourceEnvFactory.java:99)
at javax.naming.spi.NamingManager.getObjectInstance(Unknown Source)
at org.apache.naming.NamingContext.lookup(NamingContext.java:791)
at org.apache.naming.NamingContext.lookup(NamingContext.java:151)
at ShowContext.doGet(ShowContext.java:44)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
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Alexandru Popescu ☀
./alex
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