Taskflow Raise event foucs problem

Hi,
We are using Oracle ADF JDeveloper version 11.1.1.4 (released version) for our development.
We have used several taskflows / reusable taskflows in our application. For most of the taskflows we have "raised events".
However we are facing strange problem with the same.
For example:
Consider a screen where height of the screen is more than the WINDOWS height. For such a screen vertical scroll bar will be there.
There is a taskflow which is at the bottom of the screen. To see that taskflow user will use the vertical scroll and will reach there.
If USER performs any action on this taskflow then events get fired correctly but the focus atomically gets shifted to first element of the screen. Due to this behavior USER needs to scroll the screen every time which is irritating. If we disable the raise event focus doesn’t shift.
Can somebody look into this?

Hi,
customer support would be a good point of contact for analyzing the problem if you have a test case. I can only assume you are talking about contextual events ?
Frak

Similar Messages

C# COM server events "lost" when raising events while Excel is in edit mode

I posted this question on StackOverflow (http://stackoverflow.com/questions/23798443/c-sharp-com-server-events-lost-when-raising-events-while-excel-is-in-edit-mode) but did not receive a good answer, so I'm trying my luck here.
I have an in-proc COM server written in C# (using .NET Framework 3.5) that raises COM events based on this example: http://msdn.microsoft.com/en-us/library/dd8bf0x3(v=vs.90).aspx
Excel VBA is the most common client of my COM server. I’ve found that when I raise COM events while Excel is in edit mode (e.g. a cell is being edited) the event is “lost”. Meaning, the VBA event handler is never called (even after the Excel
edit mode is finished) and the call to the C# event delegate passes through and fails silently with no exceptions being thrown. Do you know how I can detect this situation on my COM server? Or better still, make the event delegate call block until
Excel is out of edit mode?
I have tried:
Inspecting the properties of the event delegate – could not find any property to indicate that the event failed to be raised on the client.
Calling the event delegate directly from a worker thread and from the main thread – event not raised on the client, no exceptions thrown on the server.
Pushing the event delegate onto a worker thread’s Dispatcher and invoking it synchronously – event not raised on the client, no exceptions thrown on the server.
Pushing the event delegate onto the main thread’s Dispatcher and invoking it synchronously and asynchronously – event not raised on the client, no exceptions thrown on the server.
Checking the status code of the Dispatcher.BeginInvoke call (using DispatcherOperation.Status) – the status is always ends with “Completed”, and is never in “Aborted” state.
Creating an out-of-proc C# COM server exe and tested raising the events from there – same result, event handler never called, no exceptions.
Since I get no indication that the event was not raised on the client, I cannot handle this situation in my code.
I have tested this with Excel 2010 and Excel 2013.
Here is a simple test case. The C# COM server:
namespace ComServerTest
public delegate void EventOneDelegate();
// Interface
[Guid("2B2C1A74-248D-48B0-ACB0-3EE94223BDD3"), Description("ManagerClass interface")]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
[ComVisible(true)]
public interface IManagerClass
[DispId(1), Description("Describes MethodAAA")]
String MethodAAA(String strValue);
[DispId(2), Description("Start thread work")]
String StartThreadWork(String strIn);
[DispId(3), Description("Stop thread work")]
String StopThreadWork(String strIn);
[Guid("596AEB63-33C1-4CFD-8C9F-5BEF17D4C7AC"), Description("Manager events interface")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
[ComVisible(true)]
public interface ManagerEvents
[DispId(1), Description("Event one")]
void EventOne();
[Guid("4D0A42CB-A950-4422-A8F0-3A714EBA3EC7"), Description("ManagerClass implementation")]
[ComVisible(true), ClassInterface(ClassInterfaceType.None)]
[ComSourceInterfaces(typeof(ManagerEvents))]
public class ManagerClass : IManagerClass
private event EventOneDelegate EventOne;
private System.Threading.Thread m_workerThread;
private bool m_doWork;
private System.Windows.Threading.Dispatcher MainThreadDispatcher = null;
public ManagerClass()
// Assumes this is created on the main thread
MainThreadDispatcher = System.Windows.Threading.Dispatcher.CurrentDispatcher;
m_doWork = false;
m_workerThread = new System.Threading.Thread(DoThreadWork);
// Simple thread that raises an event every few seconds
private void DoThreadWork()
DateTime dtStart = DateTime.Now;
TimeSpan fiveSecs = new TimeSpan(0, 0, 5);
while (m_doWork)
if ((DateTime.Now - dtStart) > fiveSecs)
System.Diagnostics.Debug.Print("Raising event...");
try
if (EventOne != null)
// Tried calling the event delegate directly
EventOne();
// Tried synchronously invoking the event delegate from the main thread's dispatcher
MainThreadDispatcher.Invoke(EventOne, new object[] { });
// Tried asynchronously invoking the event delegate from the main thread's dispatcher
System.Windows.Threading.DispatcherOperation dispOp = MainThreadDispatcher.BeginInvoke(EventOne, new object[] { });
// Tried synchronously invoking the event delegate from the worker thread's dispatcher.
// Asynchronously invoking the event delegate from the worker thread's dispatcher did not work regardless of whether Excel is in edit mode or not.
System.Windows.Threading.Dispatcher.CurrentDispatcher.Invoke(EventOne, new object[] { });
catch (System.Exception ex)
// No exceptions were thrown when attempting to raise the event when Excel is in edit mode
System.Diagnostics.Debug.Print(ex.ToString());
dtStart = DateTime.Now;
// Method should be called from the main thread
[ComVisible(true), Description("Implements MethodAAA")]
public String MethodAAA(String strValue)
if (EventOne != null)
try
// Tried calling the event delegate directly
EventOne();
// Tried asynchronously invoking the event delegate from the main thread's dispatcher
System.Windows.Threading.DispatcherOperation dispOp = System.Windows.Threading.Dispatcher.CurrentDispatcher.BeginInvoke(EventOne, new object[] { });
// Tried synchronously invoking the event delegate from the main thread's dispatcher
System.Windows.Threading.Dispatcher.CurrentDispatcher.Invoke(EventOne, new object[] { });
catch (System.Exception ex)
// No exceptions were thrown when attempting to raise the event when Excel is in edit mode
System.Diagnostics.Debug.Print(ex.ToString());
return "";
return "";
[ComVisible(true), Description("Start thread work")]
public String StartThreadWork(String strIn)
m_doWork = true;
m_workerThread.Start();
return "";
[ComVisible(true), Description("Stop thread work")]
public String StopThreadWork(String strIn)
m_doWork = false;
m_workerThread.Join();
return "";
I register it using regasm:
%SystemRoot%\Microsoft.NET\Framework\v2.0.50727\regasm /codebase ComServerTest.dll /tlb:ComServerTest.tlb
Excel VBA client code:
Public WithEvents managerObj As ComServerTest.ManagerClass
Public g_nCounter As Long
Sub TestEventsFromWorkerThread()
Set managerObj = New ComServerTest.ManagerClass
Dim dtStart As Date
dtStart = DateTime.Now
g_nCounter = 0
Debug.Print "Start"
' Starts the worker thread which will raise the EventOne event every few seconds
managerObj.StartThreadWork ""
Do While True
DoEvents
' Loop for 20 secs
If ((DateTime.Now - dtStart) * 24 * 60 * 60) > 20 Then
' Stops the worker thread
managerObj.StopThreadWork ""
Exit Do
End If
Loop
Debug.Print "Done"
End Sub
Sub TestEventFromMainThread()
Set managerObj = New ComServerTest.ManagerClass
Debug.Print "Start"
' This call will raise the EventOne event
managerObj.MethodAAA ""
Debug.Print "Done"
End Sub
' EventOne handler
Private Sub managerObj_EventOne()
Debug.Print "EventOne " & g_nCounter
g_nCounter = g_nCounter + 1
End Sub
This problem also occurs for a C++ MFC Automation server that raises COM events. If I raise the COM event from the main thread when Excel is in edit mode, the event handler is never called. No errors or exceptions are thrown on the server,
similar to my C# COM server. However, if I use the Global Interface Table to marshal the event sink interface from the main thread
back to the main thread, then invoking the event - it will block while Excel is in edit mode. (I also used COleMessageFilter to disable the busy dialog and not responding dialogs, otherwise I'd receive the exception:
RPC_E_CANTCALLOUT_INEXTERNALCALL It is illegal to call out while inside message filter.)
Knowing that, I tried to do the same on my C# COM server. I could instantiate the Global Interface Table (using the definition from pinvoke.net) and the message filter (using the IOleMessageFilter definition from MSDN). However, the event still
gets "lost" and does not block while Excel is in edit mode.
Here's my additional C# code to try to make use of the Global Interface Table:
namespace ComServerTest
// Global Interface Table definition from pinvoke.net
ComImport,
InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
Guid("00000146-0000-0000-C000-000000000046")
interface IGlobalInterfaceTable
uint RegisterInterfaceInGlobal(
[MarshalAs(UnmanagedType.IUnknown)] object pUnk,
[In] ref Guid riid);
void RevokeInterfaceFromGlobal(uint dwCookie);
[return: MarshalAs(UnmanagedType.IUnknown)]
object GetInterfaceFromGlobal(uint dwCookie, [In] ref Guid riid);
ComImport,
Guid("00000323-0000-0000-C000-000000000046") // CLSID_StdGlobalInterfaceTable
class StdGlobalInterfaceTable /* : IGlobalInterfaceTable */
public class ManagerClass : IManagerClass
//...skipped code already mentioned in earlier sample above...
//...also skipped the message filter code for brevity...
private Guid IID_IDispatch = new Guid("00020400-0000-0000-C000-000000000046");
private IGlobalInterfaceTable m_GIT = null;
public ManagerClass()
//...skipped code already mentioned in earlier sample above...
m_GIT = (IGlobalInterfaceTable)new StdGlobalInterfaceTable();
public void FireEventOne()
// Using the GIT to marshal the (event?) interface from the main thread back to the main thread (like the MFC Automation server).
// Should we be marshalling the ManagerEvents interface pointer instead? How do we get at it?
uint uCookie = m_GIT.RegisterInterfaceInGlobal(this, ref IID_IDispatch);
ManagerClass mgr = (ManagerClass)m_GIT.GetInterfaceFromGlobal(uCookie, ref IID_IDispatch);
mgr.EventOne(); // when Excel is in edit mode, event handler is never called and does not block, event is "lost"
m_GIT.RevokeInterfaceFromGlobal(uCookie);
I’d like my C# COM server to behave in a similar way to the MFC Automation server. Is this possible? I think I should be registering the ManagerEvents interface pointer in the GIT but I don't know how to get at it? I tried using Marshal.GetComInterfaceForObject(this,
typeof(ManagerEvents)) but that just throws an exception: System.InvalidCastException: Specified cast is not valid.
Thanks.

Hi Jason-F,
I’ve found that when I raise COM events while Excel is in edit mode (e.g. a cell is being edited) the event is “lost”. Meaning,
the VBA event handler is never called (even after the Excel edit mode is finished) and the call to the C# event delegate passes through and fails silently with no exceptions being thrown.
Do you mean you didn't raise EventOne event? EventOne handler like following?
' EventOne handler
Private Sub managerObj_EventOne()
Debug.Print "EventOne " & g_nCounter
g_nCounter = g_nCounter + 1
End Sub
After test your code, here is my screenshot
And here is my execute log in C# ComServerTest.
ManagerClass1/1/2015 5:48:11 PM
DoThreadWork()1/1/2015 5:48:12 PM
ManagerClass_EventOne()1/1/2015 5:48:17 PM
ManagerClass_EventOne()1/1/2015 5:48:22 PM
ManagerClass_EventOne()1/1/2015 5:48:27 PM
ManagerClass_EventOne()1/1/2015 5:48:32 PM
ManagerClass_EventOne()1/1/2015 5:48:37 PM
ManagerClass_EventOne()1/1/2015 5:48:42 PM
ManagerClass1/1/2015 5:49:56 PM
DoThreadWork()1/1/2015 5:49:56 PM
ManagerClass_EventOne()1/1/2015 5:50:01 PM
ManagerClass1/1/2015 5:50:04 PM
If i misunderstand you, please feel free to let me know.
Best regards,
kristin
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Raise event doesn't work on postback?

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http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset.htm
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http://help.sap.com/saphelp_sem40bw/helpdata/EN/86/6ff03b166c8d66e10000000a11402f/frameset
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return d_rows;
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return d_cols;
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return d_data[rowIndex][columnIndex];
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panel.setMaximumSize(size);
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panel.add(table);
window.getContentPane().add(panel);
window.setSize(new Dimension(600,800));
window.validate();
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Thanks in advance!!
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Hi,
I've fixed the problem by upgrading to 1.4.1_02. I was on 1.4.1_01.
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Hi,
I am using soa-suite 11g and was trying chapter 17 (EDN) from the book "Getting Started with Oracle SOA Suite 11g R1 – A Hands-On Tutorial".
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PO.XSD
<?xml version= '1.0' encoding= 'UTF-8' ?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://xmlns.oracle.com/ns/order"
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<element name="price" type="decimal" minOccurs="0"/>
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<element name="ccType" type="string" minOccurs="0"/>
<element name="ccNumber" type="string" minOccurs="0"/>
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<ID>33412</ID>
<productName>Sony Bluray DVD Player</productName>
<itemType>Electronics</itemType>
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<quantity>5</quantity>
<status>Initial</status>
<ccType>Mastercard</ccType>
<ccNumber>1234-1234-1234-1234</ccNumber>
</PurchaseOrder>
EDL
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://schemas.oracle.com/events/edl" targetNamespace="http://schemas.oracle.com/events/edl/POEvents">
<schema-import namespace="http://xmlns.oracle.com/ns/order" location="xsd/po.xsd"/>
<event-definition name="NewPO">
<content xmlns:ns0="http://xmlns.oracle.com/ns/order" element="ns0:PurchaseOrder"/>
</event-definition>
</definitions>
thanks in advance
Balaji

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"Failed to publish the event. A common cause is to input incorrect XML syntax. Please view the log files for details."
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oracle.fabric.common.FabricException: Error enqueing event
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at oracle.security.jps.wls.JpsWeblogicEjbInterceptor.runJaasMode(JpsWeblogicEjbInterceptor.java:61)
at oracle.security.jps.ee.ejb.JpsAbsInterceptor.intercept(JpsAbsInterceptor.java:106)
at oracle.security.jps.ee.ejb.JpsInterceptor.intercept(JpsInterceptor.java:105)
at sun.reflect.GeneratedMethodAccessor863.invoke(Unknown Source)
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at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.jee.intercept.JeeInterceptorInterceptor.invoke(JeeInterceptorInterceptor.java:69)
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at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy241.executeEDNMethod(Unknown Source)
at oracle.soa.management.internal.ejb.impl.FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.executeEDNMethod(FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java:1536)
at oracle.soa.management.internal.ejb.impl.FacadeFinderBean_4vacyo_FacadeFinderBeanImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Caused by: java.lang.NullPointerException
at oracle.integration.platform.blocks.event.saq.SAQBusinessEventBus.inGlobalTrans(SAQBusinessEventBus.java:640)
at oracle.integration.platform.blocks.event.saq.SAQBusinessEventBus.getConnection(SAQBusinessEventBus.java:1357)
at oracle.integration.platform.blocks.event.saq.SAQBusinessEventBus.publishEvent(SAQBusinessEventBus.java:511)
at oracle.integration.platform.blocks.event.EDNFacadeImpl.testEventPublish(EDNFacadeImpl.java:394)
at oracle.soa.management.internal.ejb.impl.FacadeFinderBeanImpl.executeEDNMethod(FacadeFinderBeanImpl.java:1192)
at sun.reflect.GeneratedMethodAccessor940.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at com.bea.core.repackaged.springframework.jee.intercept.MethodInvocationInvocationContext.proceed(MethodInvocationInvocationContext.java:104)
at oracle.security.jps.ee.ejb.JpsAbsInterceptor$1.run(JpsAbsInterceptor.java:88)
at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)
at oracle.security.jps.wls.JpsWeblogicEjbInterceptor.runJaasMode(JpsWeblogicEjbInterceptor.java:61)
at oracle.security.jps.ee.ejb.JpsAbsInterceptor.intercept(JpsAbsInterceptor.java:106)
at oracle.security.jps.ee.ejb.JpsInterceptor.intercept(JpsInterceptor.java:105)
at sun.reflect.GeneratedMethodAccessor863.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.jee.intercept.JeeInterceptorInterceptor.invoke(JeeInterceptorInterceptor.java:69)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.jee.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:37)
at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:55)
at com.bea.core.repackaged.springframework.jee.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:50)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy241.executeEDNMethod(Unknown Source)
at oracle.soa.management.internal.ejb.impl.FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.executeEDNMethod(FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java:1536)
at oracle.soa.management.internal.ejb.impl.FacadeFinderBean_4vacyo_FacadeFinderBeanImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:590)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:478)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:119)
... 2 more

Labview slider event handling problems - revisited

This topic asked a question that was very close to a problem I am having:
Labview slider event handling problems
That is, how do I, using an event structure and/or other means, only read out the value of a slider control after the value change is finalized?
The extra constraint I'd like to place on this, which I believe will invalidate the answer given in the thread above, is that my slider control also has a digital display which can also be used to change the value without ever using the mouse. I cannot look for a value change followed by a mouse-up event if the mouse was not used to change the value.
Any ideas how this might be accomplished? FWIW, I am using LabVIEW 7.0

Each and every incremental value-change event generated by the movement of the slider is still detected and queued up for use by the event structure and the event structure loop wades through them all before it's done.
I have come up the attached "fix" (LV v7.0) for this problem. While it is not as clean a solution as I had hoped it would be, it's the best I can manage given what LabVIEW offers me to work with and it does work in the situation where I need to use it.
Now, within the Finalize Slider Events subVI, I'm keeping track of the most-recent values seen by the subVI, checking to see if they have changed, and reporting out that fact. That gives me a Changed/Not-Changed bit within the event case that I can use to control what code then gets executed. If the event case is just playing catch-up to the real value of the control, I can now see that fact and ignore it.
In this version I've also dumped the variant output and limited the VI to using DBL values. I decided it added complication to something that was too complicated already and I wanted the output terminals for other purposes anyway (reporting of the correct "OldVal" of the control).Message Edited by Warren Massey on 04-28-2005 03:56 AM
Attachments:
slider_events[5].llb ‏77 KB

Raise event..........Help me out

Please tell me how can I trigger event from ABAP program???
I have not work on this ever....Please tell me in detail......
Thanks in Advance........

Hi Pousali,
You can raise events in ABAP using the RAISE EVENT statement.
The syntax is
RAISE EVENT <evt> EXPORTING... <ei> = <f i>...
Raising of events have got application in Object Oriented Programming, where you can give the coding for a Method to be executed when an event is raised.
In classes, if you want to raise events,
it should be defined as follows.
EVENTS critical_value EXPORTING
             value(excess) TYPE i.
The event can be raised as follows.
RAISE EVENT critical_value
         EXPORTING excess = diff.
In classes, user-defined events can be implemented by 5 steps:
1) defining the event ( as specified above )
2) defining the event handler method
eg:
METHODS handle_excess FOR EVENT critical_value      OF counter IMPORTING excess.
3) Raising of the event using RAISE EVENT stmt (as specified above)
4) Provide the implementation of the method defined in step 2.
5) Register the event by using the statement SET HANDLER statement.
In the case of pre-defined events like <b>double click , right click </b> , you need to do steps 2), 4) and 5) as the event has been defined before.
Sample program can be obtained from the following link.
http://help.sap.com/saphelp_nw04/helpdata/en/41/7af4eca79e11d1950f0000e82de14a/content.htm
Regards,
SP.

RAISE EVENT usage in real world

Hi,
I wonder what is the advantage of the statement RAISE EVENT in contrast to a normal call to a class method.
Given the following example coding:
METHOD pai_0100.
CASE ok_code.
    WHEN 'START'.
      RAISE EVENT read_sflight_data_event EXPORTING i_carrid = i_carrid.
ENDCASE.
ENDMETHOD.
This will raise the event read_sflight_data_event. This event calls the method read_sflight_data set as handler in the class constructor:
METHOD constructor.
SET HANDLER me->read_sflight_data FOR me.
ENDMETHOD.
Reading data from database...
METHOD read_sflight_data.
IF NOT i_carrid IS INITIAL.
    SELECT * FROM sflight INTO TABLE gt_sflight
      WHERE carrid = i_carrid.
ELSE.
    SELECT * FROM sflight INTO TABLE gt_sflight.
ENDIF.
ENDMETHOD.
Of course I could have written, too:
METHOD pai_0100.
CASE ok_code.
    WHEN 'START'.
      me->read_sflight_data( i_carrid = i_carrid ).
ENDCASE.
ENDMETHOD.
Which results in exactly the same result of course, however what is the advantage of events in real world? When is it useful to raise an event instead of calling the event handler directly?
Thanks for shedding some lights on this topic.

You don't have to look far to get real world SAP examples for event handling:
<ul style="list-style:circle!important">
<li>Workflow (e.g. trigger an event upon creation/change of a document)</li>
<li>ALV (e.g. react to user input like a double click)</li>
<li>Job control (e.g. fire a job upon a specific event)</li>
</ul>
When you look at the examples it's obvious that the event producer doesn't necessarily know anything about any possible future event consumers: You can ignore events, have one or multiple listeners and the listeners are usually separate from the coding unit that raised the event. Note that it depends on the event handling framework how events are processed (e.g. asynchronous versus synchronous, sequential versus parallel). For class based events the event handler processing is synchronous and sequential; for multiple event handlers their execution sequence is based on their registration order (see [raise event|http://help.sap.com/abapdocu_70/en/ABAPRAISE_EVENT.htm]).
In a simple example like the one you gave I'd say the event handling approach is possibly questionable (at least as long as all the event listeners are within the same class and there is clearly no need for other objects to listen to this event). Anyhow, the example is probably designed to show the gist of event handling, but sometimes examples from SAP look overly complicated because they seem to prefer the [SoC|http://en.wikipedia.org/wiki/Separation_of_concerns] design principle over [KISS|http://en.wikipedia.org/wiki/KISS_principle] (couldn't resist this little rant).
Cheers, harald

TCA Business Object Events: Raise Events Program

Hi,
We are integrating two ebiz instances using SOA and both the instances currently are on 11.5.10. We have back ported patches from ebiz 12i into these instances to use TCA Business Objects functionality(Business Object API's and events). I have a few questions realted to the concurrent program "TCA Business Object Events: Raise Events Program":
1) Do I need to schedule this concurrent program to raise business object events?
2) Is there an alternate way to raise these business object events(any profiles)?
Appreciate if someone can answer these questions.
Thanks,
Sak

Hi,
We use AIA and TCA Business Object Events program to integrate from one Ebiz instance to another.
To achieve what you want I would not do anything in SOA.
In out integration TCA ends up putting messages into WF_BPEL_Q.
I would use the following process: (Assuming offline time is a possibility)
1. Retire the parts of AIA that dequeue from WF_BPEL_Q. (depending on how messages are picked up.)
2. Create a PLSQL script that dequeues all messages from WF_BPEL_Q but dosn't process them. Using relevant select statements you can dequeue by message ID and select only relevant messages
3. Run whatever process you need that puts fires the Raise Events Program
4. Run the script to dequeue the messages that does nothing with them.
5. Re-activate the parts of AIA that dequeue from WF_BPEL_Q
This should give you the desired effect. Just be careful you don't screen out messages that do need to be transfered.
Robert

Taskflow Raise event foucs problem

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