org.apache.commons.dbcp.DelegatingPreparedStatement is closed..what is it?
Hi guys,
i need your help.
In my jsf application i've created one arraylist in which i collect prepared statements like
PreparedStatement pst2 =null;
pst2 = conn
.prepareStatement("INSERT INTO esperimento(id_,username,nometeam) VALUES(null,?,?);
pst2.setString(1, bean2.getLoginName());
pst2.setString(2, bean2.getTeamName());
pst2.setString(3, platformName);
experiments.add(pst2);
and i've another class with a method that execute the preparedstatements presents into experiments arraylist all at once(in a transaction).In my example there is only a prepared statement..
I've an exception launching my application
java.sql.SQLException: org.apache.commons.dbcp.DelegatingPreparedStatement is closed.
at org.apache.commons.dbcp.DelegatingStatement.checkOpen(DelegatingStatement.java:136)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101)
at giu.QueryManager.executeTransaction(QueryManager.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:126)
at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:267)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:381)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:75)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at giu.AuthorizationFilter.doFilter(AuthorizationFilter.java:59)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
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)
What can i do?'
Please help me....
Here is my method
public String executeTransaction()throws SQLException{
Experiment exp = (Experiment) ViewUtils
.eval("#{experiment}");
DataSource dataSource = Singleton.getInstance().getDataSource();
Connection conn=null;
try{
conn = dataSource.getConnection();
if (conn !=null){
conn.setAutoCommit(false);
if(exp.getExperiments()==null){
System.out.println("esperiments ?null!");
}
else System.out.println("esperiments ?pieno!!");
for (int i=0;i<exp.getExperiments().size();i++){
try{
((java.sql.PreparedStatement) exp.getExperiments().get(i)).executeUpdate();
}
catch(Exception e){
e.printStackTrace();}
}
}
if (exp.getExperiments().size()>0){
conn.commit();// Rende permanenti tutte le modifiche.
}else
conn.rollback();// Annulla tutte le modifiche.
}
catch (Exception e){
e.printStackTrace();
}finally{
try{
if (conn !=null)
conn.close();
}catch (SQLException e){
}
;
}
return"analysis";
}
