Map.invoke & map.put change visibility question

Hi,
In the documentation is stated that changes done by a entryProcessor are visible only after the processor has finished execution. I could not find statement about the opposite direction - what happens if map.invoke() and map.put() are trying to change the same entry? Is there possibility the map.put method to be executed in parallel to the map.invoke, so that map.put changes value while map.invoke is being executed on it? I saw in the forum statement that all map operations are executed in single thread (when modifying the same entry)- does this mean that map.put is sort-of standard processor and is queued just like any other processors?
Best Regards,
Georgi

Hi Georgi,
all operations related to a single entry are executed in a single-threaded manner on the storage node, meaning either one or zero thread does anything on any single entry. It is not possible that a put would occur for an entry while an entry-processor is processing that entry.
And yes, it is a usable analog to think on a put operation as an entry-processor doing a setValue on the entry, or a lock/unlock operation as an entry-processor which changes the lock ownership (note: an acquired lock for an entry does not affect anything other than a lock operation for the same entry, which will not succeed until the earlier lock was released).
Best regards,
Robert

Similar Messages

Information on the flow of a backing map put() call?

Hi,
I've been trying to find information on the flow of a backing map put() call. Can you explain how/when/if the put() is backed up in a distributed cache? e.g. is the backup copy updated during the put call as in the case of a normal put through the distributed service?
Thanks,
Andy

BigAndy wrote:
Hi,
I've been trying to find information on the flow of a backing map put() call. Can you explain how/when/if the put() is backed up in a distributed cache? If you do a direct backing map put(), the put() call does not wait for the backup to happen.
When exactly that backup happens depends on which Coherence version you use.
For certain later Coherence version (I believe starting with 3.6.0p4) if you did that backing map put from within a MapTrigger.process() or EntryProcessor.process/processAll method (in which case, I believe, it is backed up together with changes done within the EntryProcessor/MapTrigger), or not.
For earlier versions, a backing map put from an EntryProcessor or MapTrigger is going to be backed up in a backup message which is sent earlier than the backup message for the entry-processor change or whatever change triggered the map-trigger.
For a backing map put not done from an entry-processor or map trigger, first of all don't do such a thing, as it can not be guaranteed that the partition is local when the backing map put is carried out. Second of all, it is going to be backed up asynchronously and there is no other operation to compare to so nothing more needs to be said about this case...
e.g. is the backup copy updated during the put call as in the case of a normal put through the distributed service? No, it is going to happen asynchronously, and very probably later than the backing map put() returns. See above
Best regards,
Robert

Map.put() can destroy other objects' maps

Hi,
I assign a new value to an already existing key in a map:
map.put(key1, value1);
map.put(key1, value2);
While still ok in memory, the state of many maps in the database becomes
invalid.
The statement that Kodo logs is the following:
UPDATE JUNIT.MAPWI_MAP SET JDOID = ?, JDOID_VALUE = ? WHERE JDOID_KEY
= ?
Instead of just changing the value in the map's table, Kodo also changes
the owner.
I think the following statement would be correct:
UPDATE JUNIT.MAPWI_MAP SET JDOID_VALUE = ? WHERE JDOID_KEY = ? AND
JDOID = ?
A workaround is to check if a key is already in a map and removing it
before assigning it a new value. That way Kodo makes "delete" + "insert"
instead of "update".
We use Kodo 3.0.0 on Oracle.
--Wolfgang

Thank you very much for this bug report. We've fixed the problem
internally; 3.0.1 will include the fix.

Every time I try to purchase a song from itunes, it says I have to put in security questions and answer them, which it's never done before. Then after I do the questions, it says that an error occurred and my changes couldn't be saved. HELP!

Every time I try to purchase a song from itunes, it says I have to put in security questions and answer them, which it's never done before. Then after I do the questions, it says that an error occurred and my changes couldn't be saved. It has been doing this for weeks, and I can't purchase anything! HELP!

Hi mterry1723, one solution that might be worth trying is this:
- Close iTunes, if it's open
- Open Safari and got to 'Preferences'
- Select 'Security' on the top
- Untick all the security options in the menu
- Click the 'Show Cookies' button and look for all the 'apple' entries in the left-hand column.
- Highlight them (select them collectively) and press 'Remove'
- Now open iTunes and buy the song as usual.
- You may be asked to do the same security process as before, so do as asked.
- Hopefully, the security check will now have accepted your answers and start downloading the song as normal.
Remember to re-tick all the required security options you had just un-ticked in Safari preferences. You don't need to bother about opening the cookies again.
I hope this has worked for you and my profoundest apologies if it has not. Worth a go, though!
I did see this thread: https://discussions.apple.com/message/18259935#18259935 which may be of more help, mainly the last entry by 'c2boyd'
Message was edited by: Bongomal

Explain a complex mapping in informatica(interview question)

Hi Deepak, Complex mapping examples I can give you here SCD type 2 can be called as a complex mapping.Doing a mapping through indirect method can be a complex mapping. It depends on your experience. How much experience you are having. Regards,DJ

explain a complex mapping in informatica(interview question)can any one explan with a complex example thank you all in advance

Google Map is not visible.

HI all,
I'm currently working on a PCUI Scenario, which requires linking to a Google Map. I've followed a Blog by Gregor Wolf and have done all as been said in it. I'm facing an issue now. I ran my BSP Application and when i gave the Business Partner Number and clicked on search am able to see the position of the BP on the page but the map is not visible.
Can anybody throw light on this.
Helpful answers will be rewarded.
Thanks,
Prashanth.

Hi Gregor,
Thanks for your reply. I'm using Mozilla Fire Fox. Could this be of any problem, anyway let me check if Internet Security Settings could be the problem as you have said. I'm able to view the Dialog which shows the Direction and the standard buttons that are available in to move up and down except the Map.
Kindly help me in Solving this.
Thanks,
Prashanth

GPO Drive mapping - drive not visible but mapped

Did you double check your policy and make sure you selected "Show this drive" for that mapped drive?

HiI've got a weird issue and Internet has yet to give me a solution.So I've created a GPO that maps drives to certain users inOU's.Users that do not yet have a profile ona workstation get the drive mapped as expected. But users that have previously logged on to the workstations do not see the drive.gpupdate /force does not seem to resolve the issue. I ran a gpresult /H result.html and saw that the GPO succeeded in applying the user settings. I checked the drive with "net use" and there I could see that the drive was mapped butjust not visible in Windows. The drive letter I'm using is not used by another device. The reconnect checkbox is ticked in the Drive Maps properties.When I type the drive letter in the addressbar in explorer ( N:\) it works flawlessly so it's not a permission issue.So to summarize: drive is accessible and mapped...
This topic first appeared in the Spiceworks Community

I just put 55 dollars in my account and i cannot remember any oof my questions and it will not let me change the questions or answers. can i some how switch my money to a new account?

i recently purchased a new iphone 5 and it has locked me out from my account because i do not know my security questions, can i transfer the money into a new account or change my questions... i have been locked out from changing my password and other things for the next 8 hours

Hello there, hcheslynn.
The following Knowledge Base article provides a great resource for what to do next after changing your Apple ID:
Apple ID: What to do after you change your Apple ID
http://support.apple.com/kb/HT5796
Particularly for your case:
iCloud
iOS 6 and later: Go to Settings > iCloud.
If you signed out before changing your Apple ID, enter your current Apple ID to sign in. The data from your iCloud account will download to your device.
If you're still signed in with your previous Apple ID:
Scroll down and tap Delete Account. Depending on what iCloud options are turned on, you'll be asked to confirm that you want to delete data from your device. To confirm, tap Delete. (If you're using iOS 7 and have Find My iPhone turned on, you'll be asked to enter the password for your previous Apple ID. Enter the password, then tap Turn Off.) The data will be deleted from your device, but not from iCloud.
Enter your current Apple ID to sign in. The data from your iCloud account will download again to your device.
If you still get prompted for your old Apple ID's password, the following article provides some additional troubleshooting steps:
iOS 7: If you're asked for the password to your previous Apple ID when signing out of iCloud
http://support.apple.com/kb/ts5223
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

HT5570 change security questions? HELP!

It keeps telling me, in every question about the security questions, to click underneath where it says to change my questions but it doesn't show up on my computer or even apple product. Every way it has told me to change the questions either did not show visibly show up or did not work. HELP!

You need to ask Apple to reset your security questions. To do this, click here and pick a method; if that page doesn't list one for your country or you're unable to call, fill out and submit this form.
(116600)

HT5312 i want to change security questions and you told me to sent an email to be change and nothing sent to my email

i want to change security questions and you told me to sent an email to be change and nothing sent to my email

If it hasn't arrived after a few hours and isn't in a spam filter, you need to contact Apple. Click here, phone them, and ask for the Account Security team, or fill out and submit this form.
(90777)

HT201303 I want to change my questions and answers apple account?

I want to change my questions and answers apple account?
I just can not buy anything, because when I buy it asks questions and answers from my account and I forgot

It got sent to a different email address, or got caught in a spam filter, or something’s wrong at Apple’s end. You need to ask Apple to reset your security questions. To do this, click here and pick a method; if that page doesn't list one for your country or you're unable to call, fill out and submit this form.
(116802)

How to change security question

how to change security question in apple id. I forgot my answers. Please help

You need to ask Apple to reset your security questions. To do this, click here and pick a method; if that page doesn't list one for your country or you're unable to call, fill out and submit this form.
(124195)

Changing security question answers

how do i change security question answers in i forgot them?

Take a look at this:
http://support.apple.com/kb/HT5312

HT5312 How do I change the questions and answers to my security questions???????? I'm stuck! Help!

Does anyone know how to change the questions and answers on your security questions?

You need to contact Apple, either through the link in that article or by phoning them.
(77160)

HT204088 How can I to change security questions if I have forgotten them?

I can't seem to find a way to change my questions, I have forgotten my answers :(

 Account Security Team (AST) 
Check the AppleCare number for your country here:
http://support.apple.com/kb/HE57
Call them up, and let them know you would like to be transferred to the Account Security Team.

Map.invoke & map.put change visibility question

Similar Messages

Maybe you are looking for