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https://issues.apache.org/jira/browse/IGNITE-4244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15676410#comment-15676410
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Roman Shtykh edited comment on IGNITE-4244 at 11/18/16 10:57 AM:
-----------------------------------------------------------------
[~anovikov] Andrey, I was looking at INCR/DECR implementation, and looks like I
got it wrong.
I thought that I can put a value and then increment/decrement it, but it
appears that this operations are done on {{IgniteAtomicLong}} and cannot be
accessed by put or get operation (memcached and rest implemetations also have
this limitation).
The value of atomic long can be known only on return of increment/decrement
operation.
i.e., you can do
{code}
client.put("key")
client.increment("key")
client.get("key")
{code}
but key's value you access with {{get}} won't be incremented, because it is not
the atomic long you do increment.
This is my understanding.
Therefore, I changed the implementation of these Redis commands. It is not
exactly what a user expects but this is how rest is implemented.
Can you please have a look?
was (Author: roman_s):
[~anovikov] Andrey, I was looking at INCR/DECR implementation, and looks like I
got it wrong.
I thought that I can put a value and then increment/decrement it, but it
appears that this operations are done on {{IgniteAtomicLong}} and cannot be
accessed by put or get operation (memcached and rest implemetations also have
this limitation).
The value of atomic long can be known only on return of increment/decrement
operation.
i.e., you can do
{code}
client.put("key")
client.increment("key")
client.get("key")
{code}
but key's value you access with {{get}} won't be incremented, because it is not
the atomic long you do increment.
This is my understanding.
Therefore, I changed the implementation of Redis commands. It is not exactly
what a user expects but this is how rest is implemented.
Can you please have a look?
> Redis INCR/DECR to operate on AtomicLong.
> -----------------------------------------
>
> Key: IGNITE-4244
> URL: https://issues.apache.org/jira/browse/IGNITE-4244
> Project: Ignite
> Issue Type: Sub-task
> Reporter: Roman Shtykh
> Assignee: Roman Shtykh
>
> "The INCR command parses the string value as an integer, increments it by
> one, and finally sets the obtained value as the new value. "
> http://redis.io/topics/data-types-intro
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