Uma,
You've defined it the wrong way round, it should be:
public static boolean gDefaultConnectionIsOracle = false;
Regards,
James Williamson
www.nameonthe.net
----- Original Message -----
From: Uma Munugala <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, March 19, 2002 10:27 PM
Subject: Struggling for one week please Help Help..................
> Hi
>
>
> I have written a servlet which implements SingleThreadModel
> and used already existing public static syncronized classes to access
> database.
> these classes were used for standalone application.
> does static synchronized has any problem with servlets????
>
> when I deployment my servlet and try to run it gives me error, its stack
> trace is below.
>
> when login reaches to access static synchronized class member or static
> synchronized class method Iam getting
> problem.
>
> Funny thing is sames servlet and same code works in java web server. Do I
> need to do some thing else in
> tomcat 4.0.4-b1 to make it work. I tried with tomcat 4.0.3 also.
> I have seen similar problem in archives but that work around does not work
> for me.
>
> ______________________________ Error _____________________________
>
> javax.servlet.ServletException: Invoker service() exception
> at
>
org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java
> :508)
> at
> org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
> FilterChain.java:247)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
> ain.java:193)
> at filters.ExampleFilter.doFilter(ExampleFilter.java:149)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
> FilterChain.java:213)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
> ain.java:193)
> at filters.ExampleFilter.doFilter(ExampleFilter.java:149)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
> FilterChain.java:213)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
> ain.java:193)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
> va:243)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
> va:190)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase
> .java:475)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
> 46)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
> )
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
> java:170)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
> )
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
> :174)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
>
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
> 1017)
> at
>
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1115
> )
> at java.lang.Thread.run(Thread.java:484)
>
>
> root cause
>
> java.lang.ClassFormatError: com/CellFusion/Relational/RelConnection
(Illegal
> Variable name "")
> at java.lang.ClassLoader.defineClass0(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
> at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
> at
>
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLo
> ader.java:1643)
> at
>
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.jav
> a:937)
> at
>
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
> a:1372)
> at
>
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
> a:1254)
> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
> at
>
com.CellFusion.Relational.RelTransaction.beginNewTransaction(RelTransaction.
> java:22)
> at Login.doGet(Login.java:133)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
>
org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java
> :450)
> at
> org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
> FilterChain.java:247)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
> ain.java:193)
> at filters.ExampleFilter.doFilter(ExampleFilter.java:149)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
> FilterChain.java:213)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
> ain.java:193)
> at filters.ExampleFilter.doFilter(ExampleFilter.java:149)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
> FilterChain.java:213)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
> ain.java:193)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
> va:243)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
> va:190)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase
> .java:475)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
> 46)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
> )
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
> java:170)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
> )
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 64)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
> :174)
> at
>
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
> 66)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
> at
>
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
> 1017)
> at
>
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1115
> )
> at java.lang.Thread.run(Thread.java:484)
>
>
>
>
>
> ______________________________code
> description___________________________________________
>
> public class Login extends HttpServlet implements SingleThreadModel
>
>
> In this one Iam trying to access oracle database using custom developed
> classes
>
>
>
> /**
> * defineCFDatabase creates the Data Dictionary for 'cf'
> **/
> public static synchronized boolean defineCFDatabase()
> {
>
> try{
> if (!gDBInitialized) {
>
> gDBInitialized = dbCFDefinition.defineCFDatabase( false );
> if (gDBInitialized) {
>
> gDB = dbCFDefinition.getDatabase();
> dboCF = gDB;
> }
> }
>
> if (gDBInitialized && !gVariablesInitialized) {
> gVariablesInitialized = initializeVariables();
> }
> } catch(Exception e) {
> Util.log("********* Exception :" + e.toString());
> }
>
> return gDBInitialized && gVariablesInitialized;
> }
>
> In dbCFDefinition class
> public static synchronized boolean defineCFDatabase( boolean
forceAllTables
> ){
>
> Access a class called DscDomain trying to get defaultId;
>
> return boolean
> }
>
>
> DscDomain class calls a method as follows
>
>
> public String getGenericType(String dataType , int length) {
>
> if(!RelConnection.gDefaultConnectionIsOracle && mSQLServer){
> //now only for SQLServer
> if (dataType.toLowerCase().equals("varchar2")){
> dataType = "varchar";
> }
> else if (dataType.toLowerCase().equals("number")){
> dataType = "numeric";
> }
> else if (dataType.toLowerCase().equals("date")){
> dataType = "datetime";
> }
> else{
> dataType = "varchar";
> length = 0;
> }
>
> }
> if ( length == 0) {
> Util.log("------- 2 if dataType" + dataType + "
> length: " + length);
> return dataType;
>
> }
> else {
> Util.log("------- else dataType" + dataType + " length:
> " + length);
> return dataType + "(" + length + ")" ;
> }
> }
>
>
> when RelConnection.gDefaultConnectionIsOracle is accessed Iam getting
> problem
> java.lang.ClassFormatError: com/CellFusion/Relational/RelConnection
> (Illegal Variable name "")
>
> RelConnection is a public class with static members and static methods
> In the same package it is able to get other methods. when it is trying to
> access static variable iam getting this error.
>
> gDefaultConnectionIsOracle is defined as
> static public boolean gDefaultConnectionIsOracle = false;
>
>
> Thanks a lot
> Umamaheswar
>
>
>
>
> --
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>
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