DB connection close issue - help
Hello
I use jDev 11.1.15, I have a scenario where I'm passing my form values to a stored procedure to db operations. To do this, I get the values in my grain of support form. Then I will pass these values of java class AMImpl.
pageDef Action method:
<methodAction id="deleteMapping" InstanceName="AppModuleDataControl.dataProvider" DataControl="AppModuleDataControl" RequiresUpdateModel="true" Action="invokeMethod" MethodName="deleteMapping" IsViewObjectMethod="false" ReturnName="data.AppModuleDataControl.methodResults.deleteMapping_AppModuleDataControl_dataProvider_deleteMapping_result"> <NamedData NDName="mapId" NDType="java.lang.String"/> <NamedData NDName="modBy" NDType="java.lang.String"/> </methodAction>
I use in my grain of support
OperationBinding mapDelete = bindings.getOperationBinding("deleteMapping");
---
---
Map params = mapDelete.getParamsMap();
params.put("mapId", mapId);
params.put("modBy", currentUser);
output = (String)mapDelete.execute();
in my AMImpl Java class
public String deleteMapping(String mapId, String modBy) {
String output = null;
Connection conn = null;
CallableStatement st = null;
try {
conn = getDBTransaction().createStatement(1).getConnection();
if (conn != null) {
System.out.println("DB Connected");
String execProc =
"begin PKG_NM.SP_DEL_MAPPING(:ip_mapId," + ":ip_modBy," + ":op_errMsg); end;";
st = getDBTransaction().createCallableStatement(execProc, this.getDBTransaction().DEFAULT);
try {
st = (OracleCallableStatement)getDBTransaction().createCallableStatement(execProc, 0);
st.setObject("ip_mapId", mapId);
st.setObject("ip_modBy", modBy);
st.registerOutParameter("op_errMsg", Types.VARCHAR);
st.execute();
output = (String)st.getObject("op_errMsg");
} catch (SQLException se) {
System.out.println("Exception @ deleteMapping ::" + se);
}
}
} catch (Exception e) {
System.out.println("Exception @ deleteMapping :: " + e);
} finally {
try {
if (conn != null) {
conn.close();
}
if (st != null) {
st.close();
}
} catch (Exception ex) {
System.out.println("Exception @ deleteMapping finally :: " + ex);
}
}
return output;
}
My class is able to hit the stored procedure and passing the params, after that he throw below mentioned exception
oracle.jbo.JboException: Houston-29000: Unexpected exception caught: java.sql.SQLException, msg = connection is closed
If disconnection below the code in my class, his works very well. but I want to close the db connection after the process.
if (conn != null) {
conn.close();
}
Kindly help me to solve this problem.
Thanks in advance...
--
Virginia
Hello
is your application a typical ADF Application?
If you use the connection of the Application Module (AM) you must not close this (ADF Resource Manager do this work for you, for a 'normal' ADF application)!
Do you you only close the statement. So to remove this code tight connection.
Greetings
Martin
Tags: Java
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