Thanks Nikolai..this is what i am doing...not sure if this is too
much..what do you think..the goal is to make sure that a UUID is unique
across the entire application (the problem is each node that is part of the
cluster would be doing this for different entities that it owns)
...
...
System.out.println("==== in ObjectCacheMgrService.insertDepartment ==== for
dept : " + dept);
long t1 = System.currentTimeMillis();
*String uUID = new IgniteUuid(UUID.randomUUID(),
igniteAtomicSequence.incrementAndGet()).toString();*
long t2 = System.currentTimeMillis();
System.out.println("Time for UUID generation (millis) : " + (t2 - t1));
*dept.setId(uUID);*
* deptCache.getAndPut(uUID, dept);*
System.out.println("==== in ObjectCacheMgrService.insertDepartment :
department ==== inserted successfully : " + dept);
...
...
Regards,
Muthu
On Mon, Jun 12, 2017 at 3:24 AM, Nikolai Tikhonov <[email protected]>
wrote:
> Muthu,
>
> Yes, you can use IgniteUUID as unique ID generator. What you will use
> depends your requirements. IgniteAtomicSequence takes one long and
> IgniteUUID takes 3 long. But getting new range sequence is distributed
> operation. You need to decied what more critical for your.
>
> On Fri, Jun 9, 2017 at 8:46 PM, Muthu <[email protected]> wrote:
>
>>
>> Missed adding this one...i know there is support for ID generation with
>> IgniteAtomicSequence @ https://apacheignite.readme.io/docs/id-generator
>>
>> The question is which one should i use...i want to use this to generate
>> unique ids for entities that are to be cached & persisted..
>>
>> Regards,
>> Muthu
>>
>>
>> On Fri, Jun 9, 2017 at 10:27 AM, Muthu <[email protected]> wrote:
>>
>>> Hi Folks,
>>>
>>> Is it possible to generate a Grid/Cluster unique UUID using IgniteUuid.
>>> I looked at the source code & static factory method *randomUuid
>>> <https://ignite.apache.org/releases/latest/javadoc/org/apache/ignite/lang/IgniteUuid.html#randomUuid%28%29>*().
>>> It looks like it generates one with with a java.util.UUID (generated with
>>> its randomUUID) & an AutomicLong's incrementAndGet
>>>
>>> Can i safely assume that given that it uses a combination of UUID & long
>>> on the individual VMs that are part of the Grid/Cluster it will be unique
>>> or is there a better way?
>>>
>>> Regards,
>>> Muthu
>>>
>>
>>
>
