Are the service(), doPost() and doGet() methods THREAD-SAFE?

Please Let Me know If service(), doPost() and doGet() are Thread-safe. If they are not thread safe, How to make them thread-safe?

Please Let Me know If service(), doPost() and doGet() are Thread-safe. They are not.
If they are not thread safe, How to make them thread-safe?The best way is to avoid writing code that depends on a servlet's thread safety; i.e., no servlet instance variables - keep everything local to the method. Else, you'll want to learn about synchronization.
[JavaWorld article - Write thread-safe servlets|http://www.javaworld.com/javaworld/jw-07-2004/jw-0712-threadsafe.html].
~

Similar Messages

DoPost() and doGet() method calling

Hi All,
What is the purpose of calling the doGet() method inside of doPost() instead of calling it directly.
          doPost(HttpServletRequest request, HttpServletResponse response){
                                doGet(request,response);
            why we are calling the doGet() method like thisThanks in Advance,
mahes

Seemingly the post and the get do exactly the same thing, so to avoid duplicate code, (s)he just simply had one call the other.
However, you shouldn't really do it this way. You should break out the parts of the methods that are the same into new methods, and call these new methods from both the post and get methods. That will allow the two methods to handle some other things slightly differently. I.E. the get method is not suppossed to cause side effects (i.e. you are not suppossed to change any data when using a get method) whereas post methods can.

Are the APIs of java.swing.Timer thread-safe?

As the title.

They are safe for use with the event thread, as the actionPerformed method is invoked on the event thread,
so you can make UI changes from your actionPerformed without fear.
That is their only thread-related-ness, so other than that, I would think they are not thread safe in general.
: jay

What are the parameters in Call transaction method?

Hi ABAPER'S,
Please give me what are the parameters in call transaction method?
Thanks,
Prakash

Processing batch input data with CALL TRANSACTION USING is the faster of the two recommended data transfer methods. In this method, legacy data is processed inline in your data transfer program.
Syntax:
CALL TRANSACTION <tcode>
USING <bdc_tab>
MODE <mode>
UPDATE <update>
<tcode> : Transaction code
<bdc_tab> : Internal table of structure BDCDATA.
<mode> : Display mode:
A
Display all
E
Display errors only
N
No display
<update> : Update mode:
S
Synchronous
A
Asynchronous
L
Local update
A program that uses CALL TRANSACTION USING to process legacy data should execute the following steps:
Prepare a BDCDATA structure for the transaction that you wish to run.
With a CALL TRANSACTION USING statement, call the transaction and prepare the BDCDATA structure. For example:
CALL TRANSACTION 'TFCA' USING BDCDATA
MODE 'A'
UPDATE 'S'.
MESSAGES INTO MESSTAB.
IF SY-SUBRC <> 0.
<Error_handling>.
ENDIF.
The MODE Parameter
You can use the MODE parameter to specify whether data transfer processing should be displayed as it happens. You can choose between three modes:
A Display all. All screens and the data that goes in them appear when you run your program.
N No display. All screens are processed invisibly, regardless of whether there are errors or not. Control returns to your program as soon as transaction processing is finished.
E Display errors only. The transaction goes into display mode as soon as an error in one of the screens is detected. You can then correct the error.
The display modes are the same as those that are available for processing batch input sessions.
The UPDATE Parameter
You use the UPDATE parameter to specify how updates produced by a transaction should be processed. You can select between these modes:
A Asynchronous updating. In this mode, the called transaction does not wait for any updates it produces to be completed. It simply passes the updates to the SAP update service. Asynchronous processing therefore usually results in faster execution of your data transfer program.
Asynchronous processing is NOT recommended for processing any larger amount of data. This is because the called transaction receives no completion message from the update module in asynchronous updating. The calling data transfer program, in turn, cannot determine whether a called transaction ended with a successful update of the database or not.
If you use asynchronous updating, then you will need to use the update management facility (Transaction SM12) to check whether updates have been terminated abnormally during session processing. Error analysis and recovery is less convenient than with synchronous updating.
S Synchronous updating. In this mode, the called transaction waits for any updates that it produces to be completed. Execution is slower than with asynchronous updating because called transactions wait for updating to be completed. However, the called transaction is able to return any update error message that occurs to your program. It is much easier for you to analyze and recover from errors.
L Local updating. If you update data locally, the update of the database will not be processed in a separate process, but in the process of the calling program. (See the ABAP keyword documentation on SET UPDATE TASK LOCAL for more information.)
The MESSAGES Parameter
The MESSAGES specification indicates that all system messages issued during a CALL TRANSACTION USING are written into the internal table <MESSTAB> . The internal table must have the structure BDCMSGCOLL .
You can record the messages issued by Transaction TFCA in table MESSTAB with the following coding:
(This example uses a flight connection that does not exist to trigger an error in the transaction.)
DATA: BEGIN OF BDCDATA OCCURS 100.
INCLUDE STRUCTURE BDCDATA.
DATA: END OF BDCDATA.
DATA: BEGIN OF MESSTAB OCCURS 10.
INCLUDE STRUCTURE BDCMSGCOLL.
DATA: END OF MESSTAB.
BDCDATA-PROGRAM = 'SAPMTFCA'.
BDCDATA-DYNPRO = '0100'.
BDCDATA-DYNBEGIN = 'X'.
APPEND BDCDATA.
CLEAR BDCDATA.
BDCDATA-FNAM = 'SFLIGHT-CARRID'.
BDCDATA-FVAL = 'XX'.
APPEND BDCDATA.
BDCDATA-FNAM = 'SFLIGHT-CONNID'.
BDCDATA-FVAL = '0400'.
APPEND BDCDATA.
CALL TRANSACTION 'TFCA' USING BDCDATA MODE 'N'
MESSAGES INTO MESSTAB.
LOOP AT MESSTAB.
WRITE: / MESSTAB-TCODE,
MESSTAB-DYNAME,
MESSTAB-DYNUMB,
MESSTAB-MSGTYP,
MESSTAB-MSGSPRA,
MESSTAB-MSGID,
MESSTAB-MSGNR.
ENDLOOP.
The following figures show the return codes from CALL TRANSACTION USING and the system fields that contain message information from the called transaction. As the return code chart shows, return codes above 1000 are reserved for data transfer. If you use the MESSAGES INTO <table> option, then you do not need to query the system fields shown below; their contents are automatically written into the message table. You can loop over the message table to write out any messages that were entered into it.
Return codes:
Value
Explanation
0
Successful
<=1000
Error in dialog program
> 1000
Batch input error
System fields:
Name:
Explanation:
SY-MSGID
Message-ID
SY-MSGTY
Message type (E,I,W,S,A,X)
SY-MSGNO
Message number
SY-MSGV1
Message variable 1
SY-MSGV2
Message variable 2
SY-MSGV3
Message variable 3
SY-MSGV4
Message variable 4
Error Analysis and Restart Capability
Unlike batch input methods using sessions, CALL TRANSACTION USING processing does not provide any special handling for incorrect transactions. There is no restart capability for transactions that contain errors or produce update failures.
You can handle incorrect transactions by using update mode S (synchronous updating) and checking the return code from CALL TRANSACTION USING. If the return code is anything other than 0, then you should do the following:
write out or save the message table
use the BDCDATA table that you generated for the CALL TRANSACTION USING to generate a batch input session for the faulty transaction. You can then analyze the faulty transaction and correct the error using the tools provided in the batch input management facility.

What are the services in KM repostory?

Hi Gurus,
What are services available in KM Repository?
Thanks in Advance,
Dharani

HI
refer to this
http://help.sap.com/saphelp_nw70/helpdata/EN/c1/c87d3cf8ff3934e10000000a11405a/frameset.htm
dharani wrote :
what are the services in KM repostory
most of the basic question u can find information in help.sap.com
its better to work on search engine and then u can post here
just type what u typed in this thread in the above mentioned website.
regards,
vijay.

Can't do factory restore & only disks that keep ejecting are the osx install and apps disks

First of all let me say, this is my first Apple computer and I'm not experienced in forums. Please do not read rudeness into what is actually frustration at searching forever for a solution and trying not to wish I had been talked into an Apple. With that said....
I've had my iMac for about a year and a half. We had lost our internet and were using a hotspot for awhile so we could look for another provider and get online if we needed to. One day I signed on and, we didn't have an isp mind you, but the browser opened up to the dominant isp in this area saying a virus was detected coming from this iMac address? I thought that was strange and panicked so decided to do what I would on a pc, just restore the whole thing to factory settings. Everything was going smooth, (my updates were at 10.6.8 at the time)... when I restored I was back at 10.6.2. (osx disk) I was doing systems updates and one apparently hung.... when told to restart, I did... but the computer would never boot back up. It would turn on.... go to gray screen... then blue screen... then shut off. I couldn't boot in safe mode, pram reset did nothing, smc reset did nothing, couldn't hold 'd' to get to diagnostics, couldn't boot to recovery... it kept spitting out disks after trying to read them... with all those solutions I found online and nothing helping I had to call Apple... they couldn't help over the phone because Apple Care expired, unless I purchased help... this frustrated me because every where I found my problem and a different solution their Apple Care had expired too.... so had to set an appt at an Apple store.
So took it in to Apple, just got it back yesterday. I let them know I was restoring to factory settings so wasn't worried about losing anything. When I picked it up, I was told no charge... it was a software issue they saw where it hung and fixed it. I tried to ask questions about the 'software repair' but they didn't seem to want to answer my questions. It just says 'software repair' on my order. So I asked 'okay, so it's back to factory settings like when I bought it?' I was told yes and I said great that was my goal anyway. I get home and it's NOT like when I first purchased it or like a factory restore. Everything I was doing before it crashed is on there. So I'm back to trying to do a factory restore. But for some reason now, it seems the only disks that keep self ejecting are the osx install and application disks. I still can't do a boot recovery, AHT, or 'c' boot... since the apple disks eject I can't use start up to get to them.
I find it odd that both the oxc install disk and applications disk would be damaged at the same time when they both previously worked. I called the Apple Store where I took it to talk to the geniuses that worked on it because I had a question about the repair they did....
Apple: I'm sorry we don't offer tech support
Me: I understand but I had a question about the repair done from there the other day
Apple: We are just a store and can't answer tech questions
Me: I understand and get that but since I took my mac to your store to be worked on I thought I could ask the person that worked on it a question about the 'software repair' and meaning and what software was repaired
Apple: No you will have to set another apt to bring your computer in if you are still having problems
Me: UGHHHHHH (pulling hair out)
So (a little late huh?) to make a long story short giving what I stated above:
Why is it, only the osx install and application disks not working now? They worked before taking it to Apple
What can I do at this point?
Can you do a factory restore without disks on a Mac?
If by chance both disk did for some reason go out, how do I get them replaced?
If I gave TMI without enough important info let me know.
My OS X install disk says version 10.6.2 on it
About this Mac currently says Mac OS X version 10.6.8
Batteries died on keyboard and mouse so am using usb wired keyboard and mouse
At some point I had used bootcamp and then later found parallels so I could install a Corel product and keep using... could some windows files be messing something up in there somewhere?
It used to say Mac OS X Version 10.6.8 and I could have sworn I saw it said 'snow leopard' in there somewhere, now I can't even find that word in search on the computer. Long post I know but trying to set what was going on at the time I took it in.
I'm not sure what else needs to be added to get this to the correct thread or help. As I stated my goal is to have it like I just pulled it out of the box for the first time so no solution will scare me off about loss of data.
Thanks for any help.

Wow, sorry to hear of your experience. Seems strange that your disk would just eject like they did. It could be a lot of things but more than likely you just kind of have to start all over.
What I would do is insert your system disk and instead of going immediately to an install I would go to disk utility and erase the drive. That will erase everything on the disk and give you a new blank disk to start with. After that I would try to reinstall the system. Assuming that goes well then you should be restored to where it was when you purchased it. After that you can reinstall all your applications or personal files. I hope you have good backups.
I remember one time I was having a similar problem and don't ask my why I did it but I actually could not get it to install a system. I removed both of my ram sticks, shut the computer down for about 10 minutes including unplugging it from the wall plug, then reinstalled the ram, plugged it back in and started up from the system disk and all worked just fine. To this day I have no idea if pulling the ram helped but I have never had to do it since and for some dumb reason that solved the problem I was having, which is the same problem you are having now. Call it voodoo but it worked.
Good Luck!!
Message was edited by: Al Van Malsen

My iSight is not working on my Macbook Pro. What are the possible problems and solutions?

My iSight is not working on my Macbook Pro. What are the possible problems and solutions?

Hello Douglas,
Thank you for the details of the issue you are experiencing with the built-in iSight camera on your MacBook Pro. I recommend the following steps for this issue:
Important: Follow these instructions in order. Test the camera between steps to see if the issue is resolved.
Built-in iSight cameras
These steps are for iSight cameras that are built into a computer, such as the iMac G5 (iSight) or later, the MacBook, or MacBook Pro.
See if the issue is application-specific.
Try another application (iSight works with applications like iChat, PhotoBooth, and iMovie HD 6) to see if the iSight camera exhibits the same behavior in all applications. If it only happens in one application, try reinstalling that application.
See if the issue is user-specific.
Test your iSight camera in another user account. If the issue only occurs in one user, the issue would be isolated to user settings.
Find out if the computer recognizes the iSight
Check System Profiler (in the Utilities folder, inside the Applications folder). Under the USB header, check to see if the iSight camera is detected.
Reset SMC or PMU
Reset your computer's SMC or PMU, and then check System Profiler again. (SMC reset instructions for iMac G5 (iSight), Intel-based iMacs; PMU reset instructions for MacBook and MacBook Pro.)
If your built-in iSight camera is still not behaving correctly after trying all these steps, you may need to contact Apple or an Apple-Authorized Service Provider for service.
You can find the full article here:
How to Troubleshoot iSight
http://support.apple.com/kb/ht2090
Thank you for using Apple Support Communities.
Best,
Sheila M.

What are the different tools and techniques available to track analytics in SharePoint online 2013?

I want to know What are the different tools and techniques available to track analytics in SharePoint online 2013. Please provide your suggestions/ inputs. Thanks in advance.

you can Use the Web Analytics Integration app to
connect your SharePoint Online public website to third-party web analytics services, such as Webtrends, Google Analytics, Adobe, and so on.
Google Analytics
Webtrends for SharePoint
CARDIOLOG ANALYTICS
Please remember to mark your question as answered &Vote helpful,if this solves/helps your problem. ****************************************************************************************** Thanks -WS MCITP(SharePoint 2010, 2013) Blog: http://wscheema.com/blog

Servlet with dopost and main() methods

I have pre-existing servlet code for maintenance purposes.
It received a request by POST action from the client. This class also has main() method where class is instasiated and processed.
Can anyone help me understand reason for having dopost and main() methods.
TIA

Before the days of JUnit developers would write a main method for a class as a way to test the class. Some older developers still do it. I know because I am dealing with the problem now.

What are the services will cover in extended 2 year warranty for g6-2301ax?

Hi all,
I would like buy new g6-2301ax laptop. I got to know about 2 year extended warranty.
My doubts are
What are the services will cover in that extended 2 year warranty?
Will they liable for any internal device failure like HD, RAM, Display and Chipset?
Thank you

Hello MRSrinivas,
I see that you have questions about an extended warranty.
All the information I provide would be concerning an HP extended warranty.
If you purchase a warranty from a retail store or online from a site other than HP.COM then the information would not be relevant because the terms and conditions may differ for that warranty.
Here is a link with information on the extended warranty and the different kind of features you can get with an extended warranty.
A standard warranty covers hardware failures on the computer for the length of the warranty period. That includes hard drives, memory (RAM), processors, motherboards, etc.
It does not cover any accidental damage such as cracked screens or liquid damage.
You can purchase HP warranties with features like accidental damage protection which will cover a cracked screen and liquid spills.
This is basic information about the warranties you can refer to the document for in depth breakdown of what the warranty includes and what features you can get with different warranty plans.
↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

What are the services should activate?

Dear All,
We are in EHP6 and portal 7.3
What are the services need to activate?
Please share any links? or any SAP notes?
Regards
Somu

it's depends upon the requirement and molga your implementing.
You can activate the required services for ESS.
=> Run t-code SICF
=> In Service field mention HRESS* or HRMSS*
=> Click on Execute button
=> you can see all the ESS/MSS services under WEBDYNPRO -> SAP folder
=> You can activate which ever you required as per your requirement
And these are other services needs to b activated in below folders
sap -> public -> Business Suite : Activate this full folder and sub folders
sap -> public -> icf_check
sap -> public -> icf_info full folder
sap -> public -> icman
sap -> public ->info
sap -> public ->myssocntl
sap -> public ->ping
sap -> public -> bsp : Activate this full folder and sub folders
sap -> public -> bc -> pictograms
sap -> public -> bc ->icons
sap -> public -> bc ->icons_rtl
sap -> public -> bc ->ur
sap -> public -> bc ->webicons
sap -> public -> bc ->icf

What are the output type and Tcodes?+

What are the output type and Tcodes?

hi,
ex-how to config output type.
You will assign output types using Transaction NACE.
Do the follow steps to assign output type
1)Select Application Type V2 which will have description Shipping.
2)Click on Output types button.
3)Go to change mode by pressing Ctrl+F4.
4)Select one output type which already exists
5)Do Copy As(F6)
6)Give your output type against Output Type field.
7)Under General data Tab, Give Program and Form routine and Save the data.
i think it a work of functional guy but at senior level i think it is not a big deal for abaper.
Check the following documentation
In NACE t-codewe have the application for each one. based on the application output type can be defined, based on output type script and print progrma can be defined.
If suppose data can be read from EDI then we should go for condition records.
So whenever we execute the script first composer checks the output type and then execute the program. in program whenever opn form FM will be populate then script will open first. After that again program till another FM will populate if it then script will populate........like it is cycle proces. Composer does all these things and at last it will submit that output to spool.
Go to the Transaction NACE.
choose the related sub module.. like billing or shipping
doubel click on Output Types
Choose the Output Type for which whcih you wanted your script to trigger
Then select the Output Type and double click on Processing Routine
Then go to create new entries--> Select the Medium (1- print output), then enter your Script and Print Program detls --> Save and come out
Now go to the Transaction (for which you have created the output type)... Issue output--> Select the output type --> Print....
Device Types for SAP Output Devices (Detail Information)
Definition
The device type indicates the type of printer to be addressed. When you define an output device, choose the name of the device type that was defined in the SAP System for your printer model, such as Post2 for a PostScript printer. In the case of frontend printing under Microsoft Windows, you can also use the generic (device-independent) device type SWIN.
The system uses the information in the device type to convert a document from the internal SAP character representation (spool request in OTF or in text format) to a device-specific, print-ready data stream (output request). Since a device type specifies attributes that apply to all devices of a certain model, it can be shared among device definitions. For example, all devices in the SAP spool system that are compatible with Hewlett-Packard LaserJet IIID printers would use the HPLJIIID device type.
You should not confuse the device type with the printer driver. The device type is the total of all attributes of an output device that the SAP System must know to control the output device correctly, such as control commands for font selection, page size, character set selection, and so on. These attributes also include the printer driver that SAPscript/Smart Forms (the SAP form processor) should use for this printer. The SAPscript printer driver that is to be used for devices of this type for output formatting is therefore only an attribute that the device type specifies.
How do I choose the correct device type?
In most cases, the SAP System already provides the appropriate device type for the printer type for the printer model that you want to use.
These standard device types are completely defined and need no modification or extension before you use them in device definitions.
You can also download missing device types from the sapserv server. For a current list of the supported device types, see SAP Note 8928 in the SAP Service Marketplace.
Most printers can be controlled using a generic format, such as PostScript. They can be switched to a mode that is compatible with one of the standard printers for which an SAP device type is available. In this case, a supported model is emulated.
Almost all printers are delivered with Microsoft Windows printer drivers. The system can control these printers with the generic (device-independent) device type SWIN. The Microsoft Windows spool system then performs the processing of the print data.
If the specified device types are not available, and generic device types cannot be used, you must create your own device type or edit a copy of an existing device type. We recommend that only those with specialist knowledge of the SAP Spool System and printer driver code do this. For more information, see Defining a New Device Type .
Attributes of a Device Type
A device type is distinguished by the attributes listed below. If you change an existing device type or create a new device type, you must change at least some of these attributes.
Character set: A character set specifies the codes with which characters must be represented in the print-ready output stream (output request). This code replaces the generic SAP characters set that is used internally by the SAP spool system (spool request).
Printer driver: You can specify different printer drivers for printing SAPscript documents and ABAP lists.
Print controls: Print controls represent printer operations, such as boldface or changing the font size. These print control are replaced by printer-specific commands during the creation of the output request from a spool request.
Formats: Formats specify the format supported by the SAP system. The system differentiates between SAPScript formats (DINA4 and LETTER) and ABAP list formats (X_65_132 = 65 rows/132 columns).
Page format: A page format is the interface between a format and SAPscript. It specifies the paper dimensions with which SAPScript can calculate the row and column lengths.
Actions: Actions are output device-specific commands that are required for the implementation of a format. The action printer initialization, for example, can contain a printer command with which the number of rows on a page is defined. There is a set of actions for every format supported by a device type.
regards
siva

Windows could not start the Cluster Service on Local computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code 2.

Dear Technet,
Windows could not start the Cluster Service on Local computer. For more information, review the System Event Log. If this is a non-Microsoft service, contact the service vendor, and refer to service-specific error code 2.
My cluster suddenly went disappear. and tried to restart the cluster service. When trying to restart service this above mention error comes up.
even i tried to remove the cluster through power-shell still couldn't happen because of cluster service not running.
Help me please.. thank you.
Regards
Shamil

Hi,
Could you confirm which account when you start the cluster service? The Cluster service is a service that requires a domain user account.
The server cluster Setup program changes the local security policy for this account by granting a set of user rights to the account. Additionally, this account is made a member
of the local Administrators group.
If one or more of these user rights are missing, the Cluster service may stop immediately during startup or later, depending on when the Cluster service requires the particular
user right.
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

What are the services or commands contained under ASA-management-only policy ?

If an interface is enabled of management-only policy under adaptive security appliance, what are the services comes under this would be allowed ?

Thanks Obama for replying.
Here is the comment from @jaiharidas of MSFT if anyone's interested:
@Naziq, It is better to have multiple shares under single storage account and there is no perf implications. However, please ensure that your ingress/egress and request/sec is within
the limits of a single storage account (seemsdn.microsoft.com/.../dn249410.aspx)
and use multiple storage accounts if you need to scale beyond the limits.
See the original comment on Azure Storage Team here: http://ow.ly/ChPNf
@nazik_huq

Satellite M30: Are the SD-R6472 and SD-R6572 drives compatible?

Hi,
are the SD-R6472 and SD-R6572 DVD-RW DRIVES compatible with the Toshiba Satellite M30?
THX

Hi
I dont have found any further information about the compatibility of this drives with the Satellite M30.
But if you want you can visit the Toshiba website:
http://eu.computers.toshiba-europe.com/cgi-bin/ToshibaCSG/generic_content.jsp?service=EU&ID=ONLINE_SHOP
There you can find options and accessories for many Toshiba units.
Check it.
Ps: You can also try to ask the Toshiba service in your country for the details.

Are the service(), doPost() and doGet() methods THREAD-SAFE?

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