Why do we use a queue?

When we deal with event, we use queue sometimes.
But I am not really understand, why we use queue.
Why don't just execute it immediately?
Queue occurs time delay. And makes program complicated.
Can somebody tell me the reason, or what kinds of situation we use the queue?

Why don't just execute it immediately?It would be nice. Although computers are fast, code doesn't always execute instantaneously. Sometimes it may take a few milliseconds or more. So events get added to the queue and each event is processed sequentially from the queue. This is done automatically by Swing and is generally not somthing you need to worry about.

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Why we will go for Queue delta instead of Unserialized and Direct delta ?

Hi Experts,
Why we will go for Queue delta instead of Unserialized and Direct delta ? specify any reasons for that ?
What happens internally when we use Queue delta , Direct delta ?
I will allocate points to those who help me in detail. My advance thanks who respond to my query.

Hi,
Direct Delta
With this update mode, extraction data is transferred directly to the BW delta queues every time a document is posted. In this way, each document posted with delta extraction is converted to exactly one LUW in the related BW delta queues. If you are using this method, there is no need to schedule a job at regular intervals to transfer the data to the BW delta queues. On the other hand, the number of LUWs per DataSource increases significantly in the BW delta queues because the deltas of many documents are not summarized into one LUW in the BW delta queues as was previously the case for the V3 update.
If you are using this update mode, note that you cannot post any documents during delta initialization in an application from the start of the recompilation run in the OLTP until all delta init requests have been successfully updated successfully in BW. Otherwise, data from documents posted in the meantime is irretrievably lost. The restrictions and problems described in relation to the "Serialized V3 update" do not apply to this update method.
This update method is recommended for the following general criteria:
a) A maximum of 10,000 document changes (creating, changing or deleting documents) are accrued between two delta extractions for the application in question. A (considerably) larger number of LUWs in the BW delta queue can result in terminations during extraction.
b) With a future delta initialization, you can ensure that no documents are posted from the start of the recompilation run in R/3 until all delta-init requests have been successfully posted. This applies particularly if, for example, you want to include more organizational units such as another plant or sales organization in the extraction. Stopping the posting of documents always applies to the entire client.
Queued Delta
With this update mode, the extraction data for the affected application is compiled in an extraction queue (instead of in the update data) and can be transferred to the BW delta queues by an update collective run, as previously executed during the V3 update.
Up to 10,000 delta extractions of documents to an LUW in the BW delta queues are cumulated in this way per DataSource, depending on the application.
If you use this method, it is also necessary to schedule a job to regularly transfer the data to the BW delta queues ("update collective run"). However, you should note that reports delivered using the logistics extract structures Customizing cockpit are used during this scheduling. This scheduling is carried out with the same report which is used when you use the V3 updating (RMBWV311, RMBWV312 or RMBWV313).There is no point in scheduling with the RSM13005 report for this update method since this report only processes V3 update entries. The simplest way to perform scheduling is via the "Job control" function in the logistics extract structures Customizing Cockpit. We recommend that you schedule the job hourly during normal operation - that is, after successful delta initialization.
In the case of a delta initialization, the document postings of the affected application can be included again after successful execution of the recompilation run in the OLTP (e.g OLI7BW, OLI8BW or OLI9BW), provided that you make sure that the update collective run is not started before all delta Init requests have been successfully updated in the BW.
In the posting-free phase during the recompilation run in OLTP, you should execute the update collective run once (as before) to make sure that there are no old delta extraction data remaining in the extraction queues when you resume posting of documents.
Using transaction SMQ1 and the queue names MCEX11, MCEX12 or MCEX13 you can get an overview of the data in the extraction queues.
If you want to use the functions of the logistics extract structures Customizing cockpit to make changes to the extract structures of an application (for which you selected this update method), you should make absolutely sure that there is no data in the extraction queue before executing these changes in the affected systems. This applies in particular to the transfer of changes to a production system. You can perform a check when the V3 update is already in use in the respective target system using the RMCSBWCC check report.
In the following cases, the extraction queues should never contain any data:
- Importing an R/3 Support Package
- Performing an R/3 upgrade
For an overview of the data of all extraction queues of the logistics extract structures Customizing Cockpit, use transaction LBWQ. You may also obtain this overview via the "Log queue overview" function in the logistics extract structures Customizing cockpit. Only the extraction queues that currently contain extraction data are displayed in this case.
The restrictions and problems described in relation to the "Serialized V3 update" do not apply to this update method.
This update method is recommended for the following general criteria:
a) More than 10,000 document changes (creating, changing or deleting a document) are performed each day for the application in question.
b) In future delta initializations, you must reduce the posting-free phase to executing the recompilation run in R/3. The document postings should be included again when the delta Init requests are posted in BW. Of course, the conditions described above for the update collective run must be taken into account.
Un-serialized V3 Update
Note: Before PI Release 2002.1 the only update method available was V3 Update. As of PI 2002.1 three new update methods are available because the V3 update could lead to inconsistencies under certain circumstances. As of PI 2003.1 the old V3 update will not be supported anymore.
With this update mode, the extraction data of the application in question continues to be written to the update tables using a V3 update module and is retained there until the data is read and processed by a collective update run.
However, unlike the current default values (serialized V3 update); the data is read in the update collective run (without taking the sequence from the update tables into account) and then transferred to the BW delta queues.
The restrictions and problems described in relation to the "Serialized V3 update" do not apply to this update method since serialized data transfer is never the aim of this update method. However, you should note the following limitation of this update method:
The extraction data of a document posting, where update terminations occurred in the V2 update, can only be processed by the V3 update when the V2 update has been successfully posted.
This update method is recommended for the following general criteria:
a) Due to the design of the data targets in BW and for the particular application in question, it is irrelevant whether or not the extraction data is transferred to BW in exactly the same sequence in which the data was generated in R/3.
Thanks,
JituK

Why do we use WLST Scripting when things can be done manually??

Hi experts ,
It may be a stupid question ,
why do we use WLST scripting for things like deleting Queue _ _ etc , which can be done manually (through console)Please help i am newbie in this technology

In addition to the practical reasons which Barosa supplied, it is also a best practice for addtional reasons:
<ul><li>removing human errors from typos, omissions, etc
</li>
<li>making certains tasks (domain creation, configuration, application deployments, etc) repeatable, especially ones with many steps
</li>
<li>tasks that are repeatable, once tested, have a high degree of confidence that they will be done exactly the same way next time with a script
</li>
</ul>
There are many more, but hopefully this gives you an idea of the benefits.

Why do we use cl_gui_cfw= flush method in Object Oriented ALV programming

Dear Friends,
Please solve my query regarding control framework. Why do we use cl_gui_cfw=>flush method in Object Oriented ALV programming. I studied and found that this method transfers automation queue to Front end. But I could not find any further update on this.
Thanks & Regards
Amit Sharma

Generally this is to restrict the traffic b/w frontend and backend. This means that every operation in Control Framework should be first buffered in the backend and synchronized with the frontend at certain points (one of this point is calling synchronization method cl_gui_cfw=>flush ). This explicit order of synchronization is due to RFC call needed for every communication b/w front/back end. So to avoid to many RFC calls we do it only at certain time.
Please refer [Automation Queue|http://help.sap.com/saphelp_wp/helpdata/en/9b/d080ba9fc111d2bd68080009b4534c/frameset.htm]. I think it explains the concept quite well.
Regards
Marcin

Why do I use my ipod as a camera when I lose precious photos even when I try to back up before an update! Selling my ipod at the first chance I get

Why do I use my Ipod tiuch as a camera when lose precious photos of my granddaughter every time there is an operating system update? Even when I try to back up the ipod, I can't find the pics etc on my pc. It is very annoying and I am seriously considering selling my ipod because of this. No warning is given that photos will be lost. So very disappointed in aple, lost all my music last time, as well as my pics.

Yes, using the windows photo capture application is how you get photos taken with the iPod onto your pc. You should store them there, and organize them in folders.
Create one main photo folder. Inside that folder create additional folders to hold photos. Each folder will become an album on an iPod, iPad, or iPhone. Do not next any other folders inside the first album folder.
Then start iTunes on your pc and connect your iPod. Select your iPod in itunes and select the Photos tab that will be ps enter. You will most likely have first find your main photos folder. Ten select to sync all photos from your pc or select only those albums you want to have on your iPod. The click on Apply or Sync. That will copy the photos to your iPod.
If you should do something later to cause these albums to disappear from your iPod you can quickly copy them back by doing another sync.

How to get the job logs from sm35 by using the queue id and session name?

hi all,
can any one please let me know how to read the job log from sm35 by using the session name and queue id. i have the job name and job count but is it possible to download the job log by using the queue id and session name.
FYI..
i want to read this job log and i want to send it to an email id.
-> i am using the job_open and submitting the zreport via job name and job count and then i am using the function module job_close.
but this is not working in my scenario i have the queue id and session name by using this two i want to get the job log is there any function module available or code please provide me some inputs.
thanks in advance,
koushik

Hi Bharath,
If you want to download it to the local file then you can follow the instructions in the below link.
How to download Batch Input Session Log?
Regards,
Sachin

How do you remove back up data from the memory storage? my storage data states that i have over 80gb of data used for back ups and i dont know why as i use a external hard drive as a time machine .now my 250gb flash storage is nearly full

how do you remove back up data from the memory storage? my storage data states that i have over 80gb of data used for back ups and i dont know why as i use a external hard drive as a time machine .now my 250gb flash storage is nearly full.. HELP!

When Time Machine backs up a portable Mac, some of the free space will be used to make local snapshots, which are backup copies of recently deleted files. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. In the Storage display of System Information, local snapshots are shown as Backups. The snapshots are automatically deleted when they expire or when free space falls below a certain level. You ordinarily don't need to, and should not, delete local snapshots yourself. If you followed bad advice to disable local snapshots by running a shell command, you may have ended up with a lot of data in the Other category. Ask for instructions in that case.
See this support article for some simple ways to free up storage space.

Error in using the JMS Adater using weblogic queue

I am using weblogic queue in jms adapter to queue the data. i configured the server.xml
     <shared-library name="oracle.weblogic" version="10.1.3">
          <code-source path="D:\product\10.1.3.1\OracleAS_5\jdk\lib\weblogic.jar"/>
     </shared-library>
I got the following error. Any Suggestions?
file:/D:/product/10.1.3.1/OracleAS_5/bpel/domains/default/tmp/.bpel_OSM_OrderRequest_2.0_c68a29fd8af11327e1a8892e8de5a6bb.tmp/Sample.wsdl [ Produce_Message_ptt::Produce_Message(orderRequestMessage) ] - WSIF JCA Execute of operation 'Produce_Message' failed due to: Could not instantiate InteractionSpec oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec due to:
     Missing class: oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec
     Dependent class: oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA
     Loader: oracle.bpel.common:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_5/bpel/lib/orabpel.jar
     Configuration: <code-source> in /D:/product/10.1.3.1/OracleAS_5/j2ee/oc4j_soa/config/server.xml
This load was initiated at orabpel.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.; nested exception is:
     oracle.classloader.util.AnnotatedClassNotFoundException:
     Missing class: oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec
     Dependent class: oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA
     Loader: oracle.bpel.common:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_5/bpel/lib/orabpel.jar
     Configuration: <code-source> in /D:/product/10.1.3.1/OracleAS_5/j2ee/oc4j_soa/config/server.xml
This load was initiated at orabpel.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.; nested exception is:
     org.collaxa.thirdparty.apache.wsif.WSIFException: Could not instantiate InteractionSpec oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec due to:
     Missing class: oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec
     Dependent class: oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA
     Loader: oracle.bpel.common:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_5/bpel/lib/orabpel.jar
     Configuration: <code-source> in /D:/product/10.1.3.1/OracleAS_5/j2ee/oc4j_soa/config/server.xml
This load was initiated at orabpel.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.; nested exception is:
     oracle.classloader.util.AnnotatedClassNotFoundException:
     Missing class: oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec
     Dependent class: oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA
     Loader: oracle.bpel.common:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_5/bpel/lib/orabpel.jar
     Configuration: <code-source> in /D:/product/10.1.3.1/OracleAS_5/j2ee/oc4j_soa/config/server.xml
This load was initiated at orabpel.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.
</summary>
</part>
-<part name="detail">
<detail>
org.collaxa.thirdparty.apache.wsif.WSIFException: Could not instantiate InteractionSpec oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec due to:
     Missing class: oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec
     Dependent class: oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA
     Loader: oracle.bpel.common:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_5/bpel/lib/orabpel.jar
     Configuration: <code-source> in /D:/product/10.1.3.1/OracleAS_5/j2ee/oc4j_soa/config/server.xml
This load was initiated at orabpel.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.; nested exception is:
     oracle.classloader.util.AnnotatedClassNotFoundException:
     Missing class: oracle.tip.adapter.jms.outbound.JmsProduceInteractionSpec
     Dependent class: oracle.tip.adapter.fw.wsif.jca.WSIFOperation_JCA
     Loader: oracle.bpel.common:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_5/bpel/lib/orabpel.jar
     Configuration: <code-source> in /D:/product/10.1.3.1/OracleAS_5/j2ee/oc4j_soa/config/server.xml
This load was initiated at orabpel.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.

I am able to fix this error by copying "JmsAdapter.jar" to "applib" directory of oc4j_soa.
I was getting a new error.
+"Missing class: oracle.tip.adapter.api.TranslationAware+
+     Dependent class: oracle.tip.adapter.jms.JmsInteractionSpec+
+     Loader: global.libraries:1.0+
+     Code-Source: /D:/SOA1013/j2ee/oc4j_soa/applib/JmsAdapter.jar+
+     Configuration: <code-source> in /D:/SOA1013/j2ee/oc4j_soa/config/server.xml+
+The missing class is available from the following locations:+
+     1. Code-Source: /D:/SOA1013/bpel/lib/orabpel.jar (from <code-source> in /D:/SOA1013/j2ee/oc4j_soa/config/server.xml)+
+     This code-source is available in loader oracle.bpel.common:10.1.3."+
But managed it to fix it by copying "orabpel.jar" to "applib" directory.
We need to restart OC4J once we copy the JAR files.
regards,
S.Vasanth Kumar.

Why do we use open URL in default browser function? What are the uses of it?

Why do we use "open URL in default browser" function? What are the uses of it?

kdm7 wrote:
Okay.
So can we keep a web button to access the www.ni.com ? So that web site opens only when button pressed?
P.S I,m a newbie.
Yes, you can also, e.g. include a help file or manual as html and open that in the browser.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

WHY CANT I USE FINAL CUT EXPRESS HD IN MY MACBOOK

WHY CANT I USE FINAL CUT EXPRESS HD IN MY MACBOOK?

hey there DavoMrMac,
according to Apple's 'site:
System Requirements
Macintosh computer with 500MHz or faster PowerPC G4 or G5 (550MHz for PowerBook G4) or Intel Core Duo
512MB RAM
Display with 1024-by-768 (or higher) resolution
An AGP or PCI Express graphics card compatible with Quartz Extreme or an Intel GMA integrated graphics processor in MacBook or Mac Mini
Mac OS X 10.4.6 or later
QuickTime 7.0.4 or later
HDV features require 1GHz or faster processor and 1GB of RAM (2GB recommended)
500MB disk space required for applications; additional 16GB of additional storage space for Soundtrack and LiveType content (can be installed on separate disks)
DVD drive for software installation
i've been running FCE HD 3.5 on my MacBook since i got it in November '06. runs okay for the few short SD projects(15:00) or less i've put together.

I cannot use a website I need to use, with Firefox 5.0. So, I need to uninstall and go back to 3.5 or 3.6. Please advise. Also, my control panel locks up since Windows Explorer has pbms. Which is why I am using Firefox instead. Thanks for any help!

I cannot use a website I need to use, with Firefox 5.0. So, I need to uninstall and go back to 3.5 or 3.6. Please advise. Also, my control panel locks up since Windows Explorer has pbms. Which is why I am using Firefox instead. Thanks for any help!

''I figured it was going to be FAFSA causing your problem.''
Install Portable Firefox 3.6.x to your hard drive for that one website. It won't affect your current Firefox installation at all. <br />
http://portableapps.com/apps/internet/firefox_portable/localization#legacy36

Function module: why do we use FM and what is the purpose of using FM

hi,
   Can any please explain. Why do we use FM?
                                       What is the purpose of using FM ?
                                       Where we are using FM and for what tables in R/3 ?
I could be thankful to you if any one answer above questions.
Arun

Hi,
We go for creating FM when there is a chance of using the same code in different reports in R/3.
Suppose I have a requirement say, to display the Payer Name for every sale order.
This is most common requirement in any project.
You can create a FM say READ_CUSTOMER_NAME in SE37.
Write a select statement from the table VBAP to fetch the Payer Name based on the Sales Order.
Now you can activate the FM and it is ready to be used across all the reports in R/3.
Need : To avoid redundant coding and to modularize the code.
If you want to see the list of Standard FMs, got SE37 --> press F4 and you'll get all the SAP standard FMs.
For customized FMs (User defined), type Z* or Y* and press F4.
Hope this helps a bit !!!
Regards,
Balaji V

What is the significance of Marker interface? Why are we using, even though

What is the significance of Marker interface? Why are we using, even though it has no method?

Well, what's the significance of an interface? They can define a set of methods a class may implement but the class could equally well implement these methods without the interface so why having interfaces at all?
The answer is that the most important aspect of an interface is that it constitutes a type (you can declare variables of it). And it's a type regardless of how many methods it defines, including none. So the reason for having a marker interface is that you're interested solely in the type aspect of interfaces.

Why do we use dunning for vendors

Hi All...
We create dunning for customer to send them reminders for payment....But why do we use dunning for vendors (in Vendor Master Data)??
Txk,
Umesh

Hi,
If you dun customers who are also vendors and want to clear the items, the dunning program lists both the overdue customer items and the overdue vendor items in the dunning proposal, and determines a joint balance.When you dun a customer who is also a vendor, only the master record information of the customer is relevant.The items can only be cleared if the same dunning procedure has been defined in the standard dunning area for both customer and vendor.
Hope this helps you. let me know if you need anyother information.
Rgds
Manish
===========================================================================

Why do we use Allowed Operations in DML Process

Hello,
Why do we use Allowed Operations in DML Process ??
Can you please clear this confusion:
I am using apex 4.1. oracle 11g R2 SOE ...
Using the Wizard, I created a Form and IR on Dept Table...
In the form page:
- Create Button
The name is "CREATE"
NO Database Action
- DML Process
Allowed Operations: nothing is checked
This will insert a new row in the Dept table
In the form page:
- Create Button
The name is "CREATE2"
Database Action : insert
- DML Process
Allowed Operations: nothing is checked
This will insert a new row in the Dept table
So, What difference does it make if INSERT check box in Allowed Operations of DML Process is TICKED OR NOT ??
Regards,
Fateh

kdm7 wrote:
Okay.
So can we keep a web button to access the www.ni.com ? So that web site opens only when button pressed?
P.S I,m a newbie.
Yes, you can also, e.g. include a help file or manual as html and open that in the browser.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

Why do we use a queue?

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