I want to become really proficient with WLS

Hey Everybody,
My company does J2EE work and I've never had a really strong grasp of how WLS or Application Servers in general work. So, I want to fix this. I want to become really familiar with how they work and I want to be to do pretty much anything with them. What are some good resources to start with? What should I look at to learn more?
Mark

Review the examples:
http://www.oracle.com/technology/obe/fusion_middleware/wls103/index.html
See the examples that ship with the product.
Participate in the forums.
Do all that and you're on the right track.

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ConnectionPool problems with WLS 7.0 and Oracle 9.2

Hi,
We are using WLS 7.0 SP4, and Oracle 9 and the Oracle thin driver type 4. In our
application on the productive system (and only there) we constantly encounter
a whole set of SQLExceptions which have all in common that the Connection from
the pool is not valid any more when the application tries to use it.
Typical, recurring error messages are:
- Exhausted ResultSet
- Connection has already been closed
- Closed Statement
- Transaction is no longer active - status committing
- NullPointerException at
weblogic.jdbc.pool.Connection.prepareStatement()
There are no special Statements which create these errors. They are spread at
random across practically every query the application creates, and the same queries
sometimes succeed and sometimes fail.
I double and triple checked that all Connections, Statements and ResultSets are
closed immediately after use. As an example, I attached a code snippet and a resulting
StackTrace which.
The problem also seems to occur only with an (unknown) minimum of concurrent usern,
since in the approval tests on an almost identical test system these errors never
occurred.
I also followed the advice from Oracle and installed the latest Oracle JDBC driver
(Oracle 10g) - to no avail.
What else can I do?
Another question: Is it correct that my Oracle JDBC driver is in the application
classpath (via a reference in the Manifest file of the application jar), not in
the system classpath? There has never been a problem with that, but in a Newsgroup
answer from Nov 10, 2003 (subject: "ResultSet closes prematurely"), Joe Weinstein
suggested to "get it listed at the
front of the -classpath argument that the startWebLogic script creates for the
java line that starts the server".
I hesitate to do so, since the driver is in a standard WebApp- directory, WEB-INF/lib.
Is it possible and safe to add a jar located there to the system classpath? If
it is possible, why is it necessary?
Best regards,
Andreas Zehrt
[CodeSnippetsAndStackTraceForConnectionPoolProblem.txt]

Andreas Zehrt wrote:
Hi Joe,
Your hint that there is a threading problem was right:
On further investigation of the code I found out that the class that passes the
Connection to the DAO not only stores it as a member at some point (which is not
a good idea anyway) but is also a singleton - then, of course, it's no surprise
that the Connection gets invalid in a incalculable way when concurrent threads
share it.
The singleton instantiation was not so obvious because the way of instantiation
is controlled by a configuration parameter that can be overridden at different
levels.
I changed it and the productive logfiles indicate that the SQLExceptions related
to that class have disappeared.I am happy to have helped.
So, thanks a lot for the advice.
But I am still wondering why this code has worked for so long a time with WLS
5.1 and Oracle 8 (the system has been productive for over 2 years). Even in the
approval tests with WLS 7.0 and Oracle 9, we did not run into problems, although
it was multi-user environment.Mo idea.
I still believe that there is a difference between WLS 5.1 and 7.0 in the way
it treats pooled Oracle JDBC Connections. I wished both Oracle and Bea could be
a little more explicit about those changes and possible version incompatabilities
beyond the general advice "use the latest thin driver".Though I can think of no change to our pooling which would have had any material
effect in this case, I will certainly do what I can to see that our documentation
is explicit about changes.
Joe
Best regards, Andreas
Joe Weinstein <[email protected]> wrote:
Hi Andreas.
Andreas Zehrt wrote:
Hi,
We are using WLS 7.0 SP4, and Oracle 9 and the Oracle thin driver type4. In our
application on the productive system (and only there) we constantlyencounter
a whole set of SQLExceptions which have all in common that the Connectionfrom
the pool is not valid any more when the application tries to use it.
Typical, recurring error messages are:
- Exhausted ResultSetThat is typically if the statement that created it is either re-executed
or closed.
- Connection has already been closedAs described. If you give a stacktrace, we could make a debug patch which
would show
where it was originally closed.
- Closed Statementsame as above.
- Transaction is no longer active - status committingThat implies your code is obtaining a connection from a transactional
datasource,
and then later trying to use it after the transaction which it was associated
with,
is finished.
- NullPointerException at
weblogic.jdbc.pool.Connection.prepareStatement()Maybe any of the above.
There are no special Statements which create these errors. They arespread at
random across practically every query the application creates, andthe same queries
sometimes succeed and sometimes fail.
I double and triple checked that all Connections, Statements and ResultSetsare
closed immediately after use. As an example, I attached a code snippetand a resulting
StackTrace which.
The problem also seems to occur only with an (unknown) minimum of concurrentusern,
since in the approval tests on an almost identical test system theseerrors never
occurred.
I also followed the advice from Oracle and installed the latest OracleJDBC driver
(Oracle 10g) - to no avail.
What else can I do?
Another question: Is it correct that my Oracle JDBC driver is in theapplication
classpath (via a reference in the Manifest file of the applicationjar), not in
the system classpath? There has never been a problem with that, butin a Newsgroup
answer from Nov 10, 2003 (subject: "ResultSet closes prematurely"),Joe Weinstein
suggested to "get it listed at the
front of the -classpath argument that the startWebLogic script createsfor the
java line that starts the server".
I hesitate to do so, since the driver is in a standard WebApp- directory,WEB-INF/lib.
Is it possible and safe to add a jar located there to the system classpath?If
it is possible, why is it necessary?I was only concerned to ensure we know which driver we are working with.
We also ship
an oracle thin driver, which becomes obsolete soon...
I am concerned that your code creates pool connections to be used later.
The problems
can arise if more than one thread ever gets the same connection, or if
the connection
is used in the same thread, spanning transactions. It does also seem
that there may
be a threading issue, because if two threads each call the code to create
a connection,
and two connections are made, but one over-writes the other, the two
threads can
end up using the same connection, and closing it. The over-written one
never gets closed,
resulting in that leak message you got...
Joe
The Connection parameter is opened by a business component class, ComaServiceProviderClassicImpl.It is propagated through
several classes in the business layer, but not used, until the DAOtakes it to make the query.
So, the Connection is closed where it was opened, not in the DAO class.
public class ConcernDAOImpl extends BaseDAO {
     public Collection getConcernsForIncidents(Connection conn, Collectionincidents)
throws DataAccessException, ConstraintException, ComaParseException{>
sqlMessage.append(")");
String sqlStmt = sqlMessage.toString();
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
pstmt = conn.prepareStatement(sqlStmt);
rs = pstmt.executeQuery();
while (rs != null && rs.next()) {
final Concern concern =
new Concern(DAOUtil.getComaOID(rs, ComaDBNames.KDANR));
concern.setIncidentOID(DAOUtil.getComaOID(rs, ComaDBNames.KDAVGENR));
return concerns;
} catch (SQLException sqle) {
// Wrapps real SQL exception
String[] message = new String[]{sqle.getMessage(), sqlStmt};
throw new DataAccessException(ExpCode.S_ORACLE_SQL, message,
sqle);
} finally {
closeAll(rs, pstmt);
_logger.exitDebug(method);
Here, the Connection is acquired and finally closed
public class ComaServiceProviderClassicImpl {
     public void updateComplaint(
final Request updateRequest,
final ResponseSingleElement response,
final Principal principal)
throws SystemException {
try {
logger.info("updateComplaint", "store incident");
// store the incident in the database
incidentManager.storeIncident(getConnection(), updateIncident);
// reload the incident from Cache and / or the databaseto get the ContactReferences.
Incident returnIncident = incidentManager.loadIncident(//IncidentManager passes the Connection to the DAO
getConnection(), updateIncident.getOID());
} catch (RemoteException rex) {
// remote exceptions
rollbackIfNecessary();
CoreUtils.unwrapRemoteException(rex, logger);
} catch (SystemException e) {
// all other exceptions --> rollback if necessary and rethrow
rollbackIfNecessary();
throw e;
} finally {
removeConnection();
logger.exitDebug("updateComplaint");
This is the resulting StackTrace:
sql exception: [Closed Statement: next] - sql statement: [select *
     at de.deutschepost.ubbrief.coma.persistence.dao.ConcernDAOImpl.getConcernsForIncidents(ConcernDAOImpl.java:363)
     at de.deutschepost.ubbrief.coma.persistence.dao.CachingConcernDAOImpl.getConcernsForIncidents(CachingConcernDAOImpl.java:129)
     at de.deutschepost.ubbrief.coma.persistence.incidentmanager.IncidentManagerImpl.loadConcernStructuresIntoIncidents(IncidentManagerImpl.java:1067)
     at de.deutschepost.ubbrief.coma.persistence.incidentmanager.IncidentManagerImpl.loadStructureForIncident(IncidentManagerImpl.java:320)
     at de.deutschepost.ubbrief.coma.persistence.incidentmanager.IncidentManagerImpl.loadIncidents(IncidentManagerImpl.java:264)
     at de.deutschepost.ubbrief.coma.persistence.taskmanager.TaskManagerImpl.selectTasksForUser(TaskManagerImpl.java:299)
     at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2Impl.getTaskList(ComaServiceProviderZ2Impl.java:113)
     at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2Bean_1dhrj7_EOImpl.getTaskList(ComaServiceProviderZ2Bean_1dhrj7_EOImpl.java:154)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList.runServiceMethod(CMPGetTaskList.java:64)
     at de.deutschepost.ubbrief.coma.sbbx.sp.BasicMethodProvider.execute(BasicMethodProvider.java:145)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl.execute(CMPGetTaskList_9b9mv5_EOImpl.java:46)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl_WLSkel.invoke(UnknownSource)
     at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:159)
     at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:263)
     at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:230)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl_WLStub.execute(UnknownSource)
     at de.deutschepost.ubbrief.backbone.jazz.impl.core.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:115)
     at de.deutschepost.ubbrief.backbone.common.impl.core.rpc.server.ServerKernelImpl.handleTransportMessage(ServerKernelImpl.java:270)
     at de.deutschepost.ubbrief.backbone.common.impl.core.messaging.MessageTransport.handleMessage(MessageTransport.java:454)
     at de.deutschepost.ubbrief.backbone.common.impl.core.KernelFacade.handleMessage(KernelFacade.java:209)
     at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean.messageArrived(BackboneBean.java:637)
     at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean_ina9d7_ELOImpl.messageArrived(BackboneBean_ina9d7_ELOImpl.java:105)
     at de.deutschepost.ubbrief.backbone.jazz.impl.transport.receive.LocalQueueReceiveBean.deliverMessage(LocalQueueReceiveBean.java:43)
     at de.deutschepost.ubbrief.backbone.jazz.impl.transport.receive.AbstractMessageReceiveBean.onMessage(AbstractMessageReceiveBean.java:127)
     at weblogic.ejb20.internal.MDListener.execute(MDListener.java:377)
     at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:311)
     at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:286)
     at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2351)
     at weblogic.jms.client.JMSSession.execute(JMSSession.java:2267)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:234)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:210)
####<May 26, 2004 12:18:43 PM CEST> <Warning> <JDBC> <S0048016> <REMA20Z><Finalizer> <kernel identity> <> <001074> <A JDBC pool connection leak
was detected. A Connection leak occurs when a connection obtained from
the pool was not closed explicitly by calling close() and then was disposed
by the garbage collector and returned to the connection pool. The following
stack trace at create shows where the leaked connection was created.
Stack trace at connection create:
     at weblogic.jdbc.pool.Connection.<init>(Connection.java:66)
     at weblogic.jdbc.pool.Driver.allocateConnection(Driver.java:294)
     at weblogic.jdbc.pool.Driver.connect(Driver.java:210)
     at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:373)
     at weblogic.jdbc.jts.Driver.connect(Driver.java:129)
     at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:287)
     at de.deutschepost.ubbrief.coma.core.ComaComponentImpl.getConnectionFromPool(ComaComponentImpl.java:163)
     at de.deutschepost.ubbrief.coma.core.ComaComponentImpl.getConnectionInternal(ComaComponentImpl.java:135)
     at de.deutschepost.ubbrief.coma.core.ComaComponentImpl.getConnection(ComaComponentImpl.java:99)
     at de.deutschepost.ubbrief.coma.persistence.customermanager.CurryCustomerManagerImpl.findCustomers(CurryCustomerManagerImpl.java:73)
     at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2BaseImpl.resolveCustomerInstances(ComaServiceProviderZ2BaseImpl.java:808)
     at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2Impl.getTaskList(ComaServiceProviderZ2Impl.java:213)
     at de.deutschepost.ubbrief.coma.service.z2.ComaServiceProviderZ2Bean_1dhrj7_EOImpl.getTaskList(ComaServiceProviderZ2Bean_1dhrj7_EOImpl.java:154)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList.runServiceMethod(CMPGetTaskList.java:64)
     at de.deutschepost.ubbrief.coma.sbbx.sp.BasicMethodProvider.execute(BasicMethodProvider.java:145)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl.execute(CMPGetTaskList_9b9mv5_EOImpl.java:46)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl_WLSkel.invoke(UnknownSource)
     at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:159)
     at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:263)
     at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:230)
     at de.deutschepost.ubbrief.coma.sbba.z2.CMPGetTaskList_9b9mv5_EOImpl_WLStub.execute(UnknownSource)
     at de.deutschepost.ubbrief.backbone.jazz.impl.core.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:115)
     at de.deutschepost.ubbrief.backbone.common.impl.core.rpc.server.ServerKernelImpl.handleTransportMessage(ServerKernelImpl.java:270)
     at de.deutschepost.ubbrief.backbone.common.impl.core.messaging.MessageTransport.handleMessage(MessageTransport.java:454)
     at de.deutschepost.ubbrief.backbone.common.impl.core.KernelFacade.handleMessage(KernelFacade.java:209)
     at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean.messageArrived(BackboneBean.java:637)
     at de.deutschepost.ubbrief.backbone.jazz.impl.backbone.BackboneBean_ina9d7_ELOImpl.messageArrived(BackboneBean_ina9d7_ELOImpl.java:105)
     at de.deutschepost.ubbrief.backbone.jazz.impl.transport.receive.LocalQueueReceiveBean.deliverMessage(LocalQueueReceiveBean.java:43)
     at de.deutschepost.ubbrief.backbone.jazz.impl.transport.receive.AbstractMessageReceiveBean.onMessage(AbstractMessageReceiveBean.java:127)
     at weblogic.ejb20.internal.MDListener.execute(MDListener.java:377)
     at weblogic.ejb20.internal.MDListener.transactionalOnMessage(MDListener.java:311)
     at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:286)
     at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2351)
     at weblogic.jms.client.JMSSession.execute(JMSSession.java:2267)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:234)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:210)

Hey guys ! I use logic pro ... not logic proX ... and i want to record my drums with 4 mics. I got a mixer with also 4 inputs ( Behringer Xenyx QX 1202USB ) But in my Logic i can't take the third input !?!? i can only choose 1 and 2 .... Please Help :)

hey guys ! I use logic pro ... not logic proX ... and i want to record my drums with 4 mics. I got a mixer with also 4 inputs ( Behringer Xenyx QX 1202USB ) But in my Logic i can't take the third input !?!? i can only choose 1 and 2 .... Please Help

Friedrich sp wrote:
Can you send me a mixer wich can do that, please ?
Who do you think I am? Santa Claus?
What you need is not a mixer, but an audio interface with at least 4 mic inputs. There is a lot of choice there, but you should indicate a budget. You can go from, say, € 300 to € thousands, if you want.
Roland UA 1010
Focusrite Scarlett 18i8
However, there are other options (like multi-out mixer plus multi in interface, or standalone mic preamps plus interface with 4 inputs, etc). I have little experience using these however so I really cannot say much about which one(s) to get. The two mentioned above both have four mic preamps, but they are by no means the only way to do it.
The cheapest solution I can think of is to get a second 1204USB, plug it in, and in OS X create an Aggregate device (=the two are being merged into 'one virtual' interface with two discrete stereo (= four discrete mono) inputs. Disadvantage: you keep the same (limited) soundquality of the 16 bits convertors. Getting any of the interfaces mentioned earlier will also mean you'll make the significant step up from 16 to 24 bits sound.

Inet opta2000 XDatasource with WLS 6.0 sp1, please help

          Hi,
          I am using I-net Opta 2000 v2.05 JDBC XADriver with WLS 6.0 sp1.
          I create a connection pool using com.inet.tds. XDatasouce. In
          WLS startup script, I put in -Dweblogic.Debug=weblogic.JTAJDBC
          debug switch. The output reports UnknownMethod datasourceName
          exception. I attached stack trace at the end. I didn't create datasourceName.
          the next thing I want to do is:
          1) Create one CMP entity bean name cmpBean_1 using XA Pool one
          connects with MS SQL Database DB1.
          2) Create second CMP entity bean name cmpBean_2 using XA Pool
          two connects with MS SQL Database DB2.
          3) In a sessionless bean, I will do
          ut = ctx.getUserTransaction();
          ut.begin();
          cmpBean_1.doSomething();
          cmpBean_2.doSomething();
          ut.commit();
          Could I do like this?
          Thanks in advance.
          Rock
          config.xml
          <JDBCConnectionPool DriverName="com.inet.tds.XDataSource"
          Name="rock_development_tx"
          properties="user=app;password=lication" Targets="Moon"
          URL="jdbc:inetdae7:rock_development@localhost"/>
          <JDBCTxDataSource EnableTwoPhaseCommit="true"
          JNDIName="jdbc/Tx4Rock" Name="Tx_DataSource_4_Rock"
          PoolName="rock_development_tx" Targets="Moon"/>
          debug outputs:
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - XADataSource props:{user=app, password=lication, dataSourceName=rock_development_tx}>
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - Property 'user' set>
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - Property 'password' set>
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - < Cannot set property 'dataSourceName'
          java.lang.NoSuchMethodException
          at java.lang.Class.getMethod0(Native Method)
          at java.lang.Class.getMethod(Class.java:888)
          at weblogic.jdbc.common.internal.DataSourceUtil.initProp(DataSourceUtil.java:48)
          at weblogic.jdbc.common.internal.DataSourceUtil.initProps(DataSourceUtil.java:19)
          at weblogic.jdbc.common.internal.XAConnectionEnvFactory.getXADataSrc(XAConnectionE
          nvFactory.java:124)
          at weblogic.jdbc.common.internal.XAConnectionEnvFactory.<init>(XAConnectionEnvFact
          ory.java:35)
          at weblogic.jdbc.common.internal.ConnectionPool.getResourceFactory(ConnectionPool.
          java:353)
          at weblogic.jdbc.common.internal.ConnectionPool.startup(ConnectionPool.java:301)
          at weblogic.jdbc.common.JDBCService.addDeployment(JDBCService.java:91)
          at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarg
          et.java:283)
          at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(DeploymentTar
          get.java:233)
          at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeployments(Depl
          oymentTarget.java:194)
          at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(Deployment
          Target.java:158)
          at java.lang.reflect.Method.invoke(Native Method)
          at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.ja
          va:559)
          at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:545)
          at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanIm
          pl.java:285)
          at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555)
          at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
          at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:431)
          at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:172)
          at $Proxy29.updateDeployments(Unknown Source)


          Hi,
          I am using I-net Opta 2000 v2.05 JDBC XADriver with WLS 6.0 sp1.
          I create a connection pool using com.inet.tds. XDatasouce. In
          WLS startup script, I put in -Dweblogic.Debug=weblogic.JTAJDBC
          debug switch. The output reports UnknownMethod datasourceName
          exception. I attached stack trace at the end. I didn't create datasourceName.
          the next thing I want to do is:
          1) Create one CMP entity bean name cmpBean_1 using XA Pool one
          connects with MS SQL Database DB1.
          2) Create second CMP entity bean name cmpBean_2 using XA Pool
          two connects with MS SQL Database DB2.
          3) In a sessionless bean, I will do
          ut = ctx.getUserTransaction();
          ut.begin();
          cmpBean_1.doSomething();
          cmpBean_2.doSomething();
          ut.commit();
          Could I do like this?
          Thanks in advance.
          Rock
          config.xml
          <JDBCConnectionPool DriverName="com.inet.tds.XDataSource"
          Name="rock_development_tx"
          properties="user=app;password=lication" Targets="Moon"
          URL="jdbc:inetdae7:rock_development@localhost"/>
          <JDBCTxDataSource EnableTwoPhaseCommit="true"
          JNDIName="jdbc/Tx4Rock" Name="Tx_DataSource_4_Rock"
          PoolName="rock_development_tx" Targets="Moon"/>
          debug outputs:
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - XADataSource props:{user=app, password=lication, dataSourceName=rock_development_tx}>
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - Property 'user' set>
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - Property 'password' set>
          <Mar 15, 2001 10:57:14 PM PST> <Debug> <JDBC XA> <main -tx:null-
          -pool:rock_development_tx
          - < Cannot set property 'dataSourceName'
          java.lang.NoSuchMethodException
          at java.lang.Class.getMethod0(Native Method)
          at java.lang.Class.getMethod(Class.java:888)
          at weblogic.jdbc.common.internal.DataSourceUtil.initProp(DataSourceUtil.java:48)
          at weblogic.jdbc.common.internal.DataSourceUtil.initProps(DataSourceUtil.java:19)
          at weblogic.jdbc.common.internal.XAConnectionEnvFactory.getXADataSrc(XAConnectionE
          nvFactory.java:124)
          at weblogic.jdbc.common.internal.XAConnectionEnvFactory.<init>(XAConnectionEnvFact
          ory.java:35)
          at weblogic.jdbc.common.internal.ConnectionPool.getResourceFactory(ConnectionPool.
          java:353)
          at weblogic.jdbc.common.internal.ConnectionPool.startup(ConnectionPool.java:301)
          at weblogic.jdbc.common.JDBCService.addDeployment(JDBCService.java:91)
          at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarg
          et.java:283)
          at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(DeploymentTar
          get.java:233)
          at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeployments(Depl
          oymentTarget.java:194)
          at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(Deployment
          Target.java:158)
          at java.lang.reflect.Method.invoke(Native Method)
          at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.ja
          va:559)
          at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:545)
          at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanIm
          pl.java:285)
          at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555)
          at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
          at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:431)
          at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:172)
          at $Proxy29.updateDeployments(Unknown Source)

New to this and really struggling with FormsCentral

I started using Adobe Standard to create my form but somehow in the process was switched to FormsCentral online. I am creating an application with many fillable forms and it will go out to over 100 people with about 60 filling it out. I did sign up for the FormsCentral Basic account so I can get more than 50 responses. I am starting from blank and not using a template because none of the templates really went with what I am trying to do. So my first question is should I be doing this in Standard or FormsCentral? My second question is other than YouTube videos where is the best place to find step by step instructions on how to build a form? I have the basic idea and have started the form but it's not really turning out the way I had hoped, there are a lot of things that I don't know how to do so it's becoming quite frustrating.

Hi,
> Should I be doing this in Standard or FormsCentral?
Please refer to the following FAQ. It provides a comparison of the features that are available to you in each product.
http://forums.adobe.com/docs/DOC-1385
> Other than YouTube videos where is the best place to find step by step instructions on how to build a form?
Here are a few links that you might find helpful:
http://blogs.adobe.com/acom/2011/03/formscentral-tutorial-part-1-creating-the-form.html
http://acrobatusers.com/tutorials/creating-forms-using-adobe-formscentral
http://acrobatusers.com/tutorials/filter/search&category=75&channel=tutorials/
If you have any specific questions, please post them to the forum.
Regards,
Brian

Workaround for using Oracle JDBC extension with WLS pooling

Reading the newsgroup I saw that many of us encountered the problems
with ClassCastException when tried to use Oracle JDBC extension
with WLS pooling. I also had.
In this case BEA recommends to use dangerous
method getVendorConnection() which exposes
the physical connection object to your code.
Yes it's really dangerous because of unsafe usage may breaks
WLS pooled connection(s).
Moreover, this practice will make your JDBC code
unportable (your JDBC code in addition to Oracle dependence
became Weblogic dependent):
void doSmth() {
Connection con = ...;
Connection vCon = ((WLConnection)con).getVendorConnection();
// + mess of usage con in one places and vCon in others
// (where Oracle extensions are needed)
// !Don't forget to don't close vCon!
Sux.
I found the workaround.
Introduction
============
Yes the real cause of ClassCastException is that
in depth of Oracle driver the casting
to class oracle.jdbc.driver.OracleConnection
(not to interface oracle.jdbc.OracleConnection)
is performed.
Someone can say that this is bug or pure desing.
Weblogic pooled connection provide dynamic
implementation for all public interfaces
which real physical (wrapped) connection object implements.
Great feature!
But I guess that all interface methods implemented
by simple call-delegation to physical (wrapped) connection object.
In case of oracle.jdbc.OracleConnection interface
this approach doesn't work for at least one its method:
public OracleConnection unwrap()
WLS pooled connection shoudn't implement this method by
delegation to physical connection object BUT should
return physical connection object itself!
// Wrong implementation of unwrap()
// delegation is used
public OracleConnection unwrap() {
return physicalConnection.unwrap();
// Right implementation of unwrap()
// physical connection returned
public OracleConnection unwrap() {
return physicalConnection;
Workaround
==========
1. Develop your own OracleConnection wrapper class:
import oracle.jdbc.OracleConnection;
import weblogic.jdbc.extensions.WLConnection;
public class MyOracleConnectionImpl implements OracleConnection {
private OracleConnection con;
public MyOracleConnectionImpl(OracleConnection connection)
throws SQLException
this.con = connection;
public OracleConnection unwrap() {
return (OracleConnection)
((WLConnection)con).getVendorConnection();
/* Implement all other methods by delegation to con object */
2. Don't get Connections directly from DataSource --
develop your own simple (may be static) utility
class which retrives Connections from dataSource
and returns them wrapped into your MyOracleConnectionImpl
to your code from some method:
puclic abstract class MyConnectionSource {
public static Connection getConnection() {
Connection con = // get it from DataSource
return new MyOracleConnectionImpl((OracleConnection)con);
3. Add attribute RemoveInfectedConnectionsEnabled="false"
to definition of your JDBCConnectionPool within config.xml
You may do it because of you `safely` use vendorConnection --
you don't expose it to application code.
4. Enjoy the Oracle JDBC extensions in your code!
Example:
Connection con = MyConnectionSource.getConnection;
ArrayDescriptor add =
ArrayDescriptor.createDescriptor("your_type", con);
Hope it helps to someone.
Best regards,
Eugene Voytitsky

Hello Eugene Voytitsky,
Thanks Eugene Voytitsky for your idea
I have tried the solution suggested by You, but it did not work.
It still throws ClassCastException.
I am sorry for posting the whole code of two classes below.
I did this to give you more clarity.
I am also indicating the place where the exception was thrown..
Please let me know if I am doing something wrong.
OracleConnection Wrapper class
package ejbTesting;
// sql imports
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
// util imports
import java.util.Map;
import java.util.Properties;
// imports from Oracle Driver Classes
import oracle.jdbc.OracleConnection;
import oracle.jdbc.OracleOCIFailover;
import oracle.jdbc.OracleSavepoint;
// import from Weblogic extensions
import weblogic.jdbc.extensions.WLConnection;
public class WeblogicConnectionWrapper implements OracleConnection
     // oracle connection object
     private OracleConnection connection;
     public WeblogicConnectionWrapper (OracleConnection orclConnection)
          try
               this.connection = orclConnection;
          catch(Exception unexpected )
               unexpected.printStackTrace();
     public OracleConnection unwrap()
          try
          // The datasource returns a weblogic.jdbc.pool.Connection
          // This needs to be type casted to weblogic.jdbc.extensions.WLConnection
          // Only this weblogic.jdbc.extensions.WLConnection CAN BE type casted
          // to OracleConnection
     return (OracleConnection) ((WLConnection) connection).getVendorConnection();
     catch(Exception sqlException )
          sqlException.printStackTrace ();
          return null;
     /* Implement all other methods by delegation to connection object */
public Connection _getPC()
return connection._getPC();
public void archive(int i, int j, String s)
throws SQLException
connection.archive(i, j, s);
public void assertComplete()
throws SQLException
connection.assertComplete();
public void clearWarnings()
throws SQLException
connection.clearWarnings();
public void close()
throws SQLException
connection.close();
public void commit()
throws SQLException
connection.commit();
public Statement createStatement()
throws SQLException
return connection.createStatement();
public Statement createStatement(int i, int j)
throws SQLException
return connection.createStatement(i, j);
public boolean getAutoClose()
throws SQLException
return connection.getAutoClose();
public boolean getAutoCommit()
throws SQLException
return connection.getAutoCommit();
public CallableStatement getCallWithKey(String s)
throws SQLException
return connection.getCallWithKey(s);
public String getCatalog()
throws SQLException
return connection.getCatalog();
public boolean getCreateStatementAsRefCursor()
return connection.getCreateStatementAsRefCursor();
public int getDefaultExecuteBatch()
return connection.getDefaultExecuteBatch();
public int getDefaultRowPrefetch()
return connection.getDefaultRowPrefetch();
public Object getDescriptor(String s)
return connection.getDescriptor(s);
public boolean getExplicitCachingEnabled()
throws SQLException
return connection.getExplicitCachingEnabled();
public boolean getImplicitCachingEnabled()
throws SQLException
return connection.getImplicitCachingEnabled();
public boolean getIncludeSynonyms()
return connection.getIncludeSynonyms();
public Object getJavaObject(String s)
throws SQLException
return connection.getJavaObject(s);
public DatabaseMetaData getMetaData()
throws SQLException
return connection.getMetaData();
public Properties getProperties()
return connection.getProperties();
public boolean getRemarksReporting()
return connection.getRemarksReporting();
public boolean getRestrictGetTables()
return connection.getRestrictGetTables();
public String getSQLType(Object obj)
throws SQLException
return connection.getSQLType(obj);
public String getSessionTimeZone()
return connection.getSessionTimeZone();
public int getStatementCacheSize()
throws SQLException
return connection.getStatementCacheSize();
public PreparedStatement getStatementWithKey(String s)
throws SQLException
return connection.getStatementWithKey(s);
public int getStmtCacheSize()
return connection.getStmtCacheSize();
public short getStructAttrCsId()
throws SQLException
return connection.getStructAttrCsId();
public boolean getSynchronousMode()
return connection.getSynchronousMode();
public int getTransactionIsolation()
throws SQLException
return connection.getTransactionIsolation();
public Map getTypeMap()
throws SQLException
return connection.getTypeMap();
public String getUserName()
throws SQLException
return connection.getUserName();
public boolean getUsingXAFlag()
return connection.getUsingXAFlag();
public SQLWarning getWarnings()
throws SQLException
return connection.getWarnings();
public boolean getXAErrorFlag()
return connection.getXAErrorFlag();
public boolean isClosed()
throws SQLException
return connection.isClosed();
public boolean isLogicalConnection()
return connection.isLogicalConnection();
public boolean isReadOnly()
throws SQLException
return connection.isReadOnly();
public String nativeSQL(String s)
throws SQLException
return connection.nativeSQL(s);
public Object openJoltConnection(String s, short word0, short word1)
return connection.openJoltConnection(s, word0, word1);
public void oracleReleaseSavepoint(OracleSavepoint oraclesavepoint)
throws SQLException
connection.oracleReleaseSavepoint(oraclesavepoint);
public void oracleRollback(OracleSavepoint oraclesavepoint)
throws SQLException
connection.oracleRollback(oraclesavepoint);
public OracleSavepoint oracleSetSavepoint()
throws SQLException
return connection.oracleSetSavepoint();
public OracleSavepoint oracleSetSavepoint(String s)
throws SQLException
return connection.oracleSetSavepoint(s);
public int pingDatabase(int i)
throws SQLException
return connection.pingDatabase(i);
public CallableStatement prepareCall(String s)
throws SQLException
return connection.prepareCall(s);
public CallableStatement prepareCall(String s, int i, int j)
throws SQLException
return connection.prepareCall(s, i, j);
public CallableStatement prepareCallWithKey(String s)
throws SQLException
return connection.prepareCallWithKey(s);
public PreparedStatement prepareStatement(String s)
throws SQLException
return connection.prepareStatement(s);
public PreparedStatement prepareStatement(String s, int i, int j)
throws SQLException
return connection.prepareStatement(s, i, j);
public PreparedStatement prepareStatementWithKey(String s)
throws SQLException
return connection.prepareStatementWithKey(s);
public void purgeExplicitCache()
throws SQLException
connection.purgeExplicitCache();
public void purgeImplicitCache()
throws SQLException
connection.purgeImplicitCache();
public void putDescriptor(String s, Object obj)
throws SQLException
connection.putDescriptor(s, obj);
public void registerApiDescription(String s, short word0, short word1, String
s1)
connection.registerApiDescription(s, word0, word1, s1);
public void registerSQLType(String s, Class class1)
throws SQLException
connection.registerSQLType(s, class1);
public void registerSQLType(String s, String s1)
throws SQLException
connection.registerSQLType(s, s1);
public void registerTAFCallback(OracleOCIFailover oracleocifailover, Object
obj)
throws SQLException
connection.registerTAFCallback(oracleocifailover, obj);
public void rollback()
throws SQLException
connection.rollback();
public void setAutoClose(boolean flag)
throws SQLException
connection.setAutoClose(flag);
public void setAutoCommit(boolean flag)
throws SQLException
connection.setAutoCommit(flag);
public void setCatalog(String s)
throws SQLException
connection.setCatalog(s);
public void setCreateStatementAsRefCursor(boolean flag)
connection.setCreateStatementAsRefCursor(flag);
public void setDefaultExecuteBatch(int i)
throws SQLException
connection.setDefaultExecuteBatch(i);
public void setDefaultRowPrefetch(int i)
throws SQLException
connection.setDefaultRowPrefetch(i);
public void setExplicitCachingEnabled(boolean flag)
throws SQLException
connection.setExplicitCachingEnabled(flag);
public void setImplicitCachingEnabled(boolean flag)
throws SQLException
connection.setImplicitCachingEnabled(flag);
public void setIncludeSynonyms(boolean flag)
connection.setIncludeSynonyms(flag);
public void setReadOnly(boolean flag)
throws SQLException
connection.setReadOnly(flag);
public void setRemarksReporting(boolean flag)
connection.setRemarksReporting(flag);
public void setRestrictGetTables(boolean flag)
connection.setRestrictGetTables(flag);
public void setSessionTimeZone(String s)
throws SQLException
connection.setSessionTimeZone(s);
public void setStatementCacheSize(int i)
throws SQLException
connection.setStatementCacheSize(i);
public void setStmtCacheSize(int i)
throws SQLException
connection.setStmtCacheSize(i);
public void setStmtCacheSize(int i, boolean flag)
throws SQLException
connection.setStmtCacheSize(i, flag);
public void setSynchronousMode(boolean flag)
connection.setSynchronousMode(flag);
public void setTransactionIsolation(int i)
throws SQLException
connection.setTransactionIsolation(i);
public void setTypeMap(Map map)
throws SQLException
connection.setTypeMap(map);
public void setUsingXAFlag(boolean flag)
connection.setUsingXAFlag(flag);
public void setWrapper(OracleConnection oracleconnection)
connection.setWrapper(oracleconnection);
public void setXAErrorFlag(boolean flag)
connection.setXAErrorFlag(flag);
public void shutdown(int i)
throws SQLException
connection.shutdown(i);
public void startup(String s, int i)
throws SQLException
connection.startup(s, i);
Util class to get Wrapped Connections from
datasource
package ejbTesting;
// j2ee imports
import javax.naming.InitialContext;
import javax.sql.DataSource;
// sql imports
import java.sql.Connection;
// imports from Oracle Driver Classes
import oracle.jdbc.OracleConnection;
* Wrapper class for the DataSource Connection from Weblogic pool
public class DataSourceConnectionWrapper
     // datasource variable
     private static transient DataSource datasource = null;
     private static String dbName = "jdbc/workbench";
* Method that returns the database connection
     public static Connection getConnection()
          try
               // initialsing the datasource object
               initialiseDataSource ();
               // Getting a connection from the datasource
               Connection con = datasource.getConnection( );
               // wrapping it custom wrapper class and
               // returning the connection object
               return new WeblogicConnectionWrapper((OracleConnection)con);
          catch(Exception exception )
               exception.printStackTrace();
               return null;
     private static void initialiseDataSource( ) throws Exception
if ( datasource == null )
try
InitialContext ic = new InitialContext( );
datasource = (DataSource) ic.lookup( dbName );
catch (Exception ne )
throw new Exception( "NamingException while looking up DataSource with
JNDI name" +
dbName + ": \n" + ne.getMessage( ) );
Exception Stack Trace
The line 46 in DataSourceConnectionWrapper
corresponds to
return new WeblogicConnectionWrapper((OracleConnection)con);
Which I feel is logical as the connection which we get from Weblogic
datasource cannot be type casted to OracleConnection
java.lang.ClassCastException: weblogic.jdbc.pool.Connection
at ejbTesting.DataSourceConnectionWrapper.getConnection(DataSourceConnectionWrapper.java:46)

I want to make a deal with the iphone i am american person from tx but now i am in ukraine so i want to buy a 1000 iphone 5 and cash u can send it to me in the airport in ukraine in kive city with a man so he give me the iphone and i give him the money ca

i will be happy work for apple really andi want to make a deal with the iphone i am american person from tx but now i am in ukraine so i want to buy a 1000 iphone 5 and cash u can send it to me in the airport in ukraine in kive city with a man so he give me the iphone and i give him the money cash and i want to make my name a business man and if i can work with apple

yeah. Good luck with that.

I want to become really proficient with WLS

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