ClassNotFoundException

kumarisam · 2011-02-22T14:56:06+00:00

I am trying to run the following code. public static void main(String[] args) { IReportEngine engine = null; IReportRunnable design = null; IRunTask task = null; IReportDocument iReportDocument = null; IDataExtractionTask iDataExtract = null; ArrayList resultSetList = null; …

kumarisam

I am trying to run the following code.

public static void main(String[] args)
{
IReportEngine engine = null;
IReportRunnable design = null;
IRunTask task = null;
IReportDocument iReportDocument = null;
IDataExtractionTask iDataExtract = null;
ArrayList resultSetList = null;
IResultSetItem resultItem = null;
String dispName = null;
IExtractionResults iExtractResults = null;
IDataIterator iData = null;
Object objColumn1 = null;;
Object objColumn2 = null;
IRenderTask renderTask = null;
com.ibm.db2.jcc.DB2Driver driver = null;
try
{
System.out.println("I am here");
ClassLoader loader = ClassLoader.getSystemClassLoader();
System.out.println("I am here 1");
loader.loadClass("com.ibm.db2.jcc.DB2Driver");
System.out.println("I am here 2");
DriverManager.registerDriver(new com.ibm.db2.jcc.DB2Driver());
System.out.println("I am here 3");
engine = ReportingEngineService.getEngine();

// Open the report design
design = engine
.openReportDesign("D:/SSP/build/workspace_emk/cms_birt_reports/cms_reports.rptdesign");

// Create task to run the report - use the task to execute the
// report and save to disk.
task = engine.createRunTask(design);

// run the report and destroy the engine
task.run("d:/BIRT/output/test.rptdocument");

On the above task.run method I am getting following error:

SEVERE: DriverClassLoader failed to load class: com.ibm.db2.jcc.DB2Driver
Throwable occurred: java.lang.ClassNotFoundException: com.ibm.db2.jcc.DB2Driver
at org.eclipse.birt.core.framework.URLClassLoader.findClass(URLClassLoader.java:159)
at java.lang.ClassLoader.loadClass(ClassLoader.java:653)
at java.lang.ClassLoader.loadClass(ClassLoader.java:619)
at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.loadExtraDriver(JDBCDriverManager.java:852)
at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.findDriver(JDBCDriverManager.java:686)
at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.loadAndRegisterDriver(JDBCDriverManager.java:816)
at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.doConnect(JDBCDriverManager.java:213)
at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.getConnection(JDBCDriverManager.java:179)
at org.eclipse.birt.report.data.oda.jdbc.Connection.connectByUrl(Connection.java:220)
at org.eclipse.birt.report.data.oda.jdbc.Connection.open(Connection.java:151)
at org.eclipse.datatools.connectivity.oda.consumer.helper.OdaConnection.open(OdaConnection.java:235)
at org.eclipse.birt.data.engine.odaconsumer.ConnectionManager.openConnection(ConnectionManager.java:157)
at org.eclipse.birt.data.engine.executor.DataSource.newConnection(DataSource.java:236)
at org.eclipse.birt.data.engine.executor.DataSource.open(DataSource.java:223)
at org.eclipse.birt.data.engine.impl.DataSourceRuntime.openOdiDataSource(DataSourceRuntime.java:209)
at org.eclipse.birt.data.engine.impl.QueryExecutor.openDataSource(QueryExecutor.java:390)
at org.eclipse.birt.data.engine.impl.QueryExecutor.prepareExecution(QueryExecutor.java:309)
at org.eclipse.birt.data.engine.impl.PreparedQuery.doPrepare(PreparedQuery.java:498)
at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.produceQueryResults(PreparedDataSourceQuery.java:189)
at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.execute(PreparedDataSourceQuery.java:177)
at org.eclipse.birt.data.engine.impl.PreparedOdaDSQuery.execute(PreparedOdaDSQuery.java:143)
at org.eclipse.birt.report.data.adapter.impl.DataRequestSessionImpl.execute(DataRequestSessionImpl.java:482)
at org.eclipse.birt.report.engine.data.dte.DteDataEngine.doExecuteQuery(DteDataEngine.java:115)
at org.eclipse.birt.report.engine.data.dte.DataGenerationEngine.doExecuteQuery(DataGenerationEngine.java:79)
at org.eclipse.birt.report.engine.data.dte.AbstractDataEngine.execute(AbstractDataEngine.java:253)
at org.eclipse.birt.report.engine.executor.ExecutionContext.executeQuery(ExecutionContext.java:1755)
at org.eclipse.birt.report.engine.executor.QueryItemExecutor.executeQuery(QueryItemExecutor.java:77)
at org.eclipse.birt.report.engine.executor.TableItemExecutor.execute(TableItemExecutor.java:62)
at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.java:45)
at org.eclipse.birt.report.engine.internal.executor.emitter.ReportItemEmitterExecutor.execute(ReportItemEmitterExecutor.java:45)
at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:42)
at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:63)
at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:90)
at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:101)
at org.eclipse.birt.report.engine.presentation.ReportDocumentBuilder.build(ReportDocumentBuilder.java:211)
at org.eclipse.birt.report.engine.api.impl.RunTask.doRun(RunTask.java:237)
at org.eclipse.birt.report.engine.api.impl.RunTask.run(RunTask.java:90)

I have the db2jcc.jar file in the class path and I am using BIRT 2.3.2.2 version.

Any help is greatly appreciated.

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Comments

mwilliams

Is this deployed or from the designer? Where are you putting the driver jar?

quincybatten

ClassNotFoundException is a checked exception in Java that occurs when an application tries to load a class through its fully qualified name, but the class could not be found. The class could be missing in the classpath, or it could have been compiled with a different version of the Java SDK than the one being used by the application.

There are several ways to solve ClassNotFoundException:

Verify the class name: Make sure that you have spelled the fully qualified name of the class correctly.
Check the classpath: Ensure that the class is available in the classpath. If the class is not in the classpath, you can add it to the classpath using the -cp or -classpath option when you run the Java application.
Check the jar file: If the class is part of a jar file, make sure that the jar file is in the classpath and that it contains the class file. You can use the jar command to list the contents of a jar file.
Verify the version of Java: Make sure that the class was compiled with the same version of Java that you are using to run the application.
Check for missing dependencies: If the class you are trying to load depends on other classes, make sure that those classes are also in the classpath.

If you have verified all of these things and the java exception still persists, you may need to recompile the class and its dependencies.