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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-3060) Refactor MeteredXXStore
Date Thu, 28 Jan 2016 19:22:39 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-3060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15122147#comment-15122147

ASF GitHub Bot commented on KAFKA-3060:

GitHub user guozhangwang opened a pull request:


    KAFKA-3060: Refactor MeteredStore and RockDBStore Impl

    Changes include:
    1) Move logging logic from MeteredXXXStore to internal stores, and leave WindowedStore
API clean by removed all internalPut/Get functions.
    2) Wrap common logging behavior of InMemory and LRUCache stores into one class.
    3) Fix a bug for StoreChangeLogger where byte arrays are not comparable in HashSet by
using a specified RawStoreChangeLogger.
    4) Add a caching layer on top of RocksDBStore with object caching, it relies on the object's
equals and hashCode function to be consistent with serdes.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/guozhangwang/kafka K3060

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #826
commit bf4c4cb3dbb5b4066d9c3e0ada5b7ffd98eb129a
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-14T20:27:58Z

    add internal source topic for tracking

commit 1485dff08a76c6ff685b0fe72226ce3b629b1d3c
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-14T22:32:08Z

    minor fix for this.interSourceTopics

commit 60cafd0885c41f93e408f8d89880187ddec789a1
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-15T01:09:00Z

    add KStream windowed aggregation

commit 983a626008d987828deabe45d75e26e909032843
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-15T01:34:56Z

    merge from apache trunk

commit 57051720de4238feb4dc3c505053096042a87d9c
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-15T21:38:53Z


commit 4a49205fcab3a05ed1fd05a34c7a9a92794b992d
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-15T22:07:17Z

    minor fix on HoppingWindows

commit 9b4127e91c3a551fb655155d9b8e0df50132d0b7
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-15T22:43:14Z

    fix HoppingWindows

commit 9649fe5c8a9b2e900e7746ae7b8745bb65694583
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-16T19:00:54Z

    add retainDuplicate option in RocksDBWindowStore

commit 8a9ea02ac3f9962416defa79d16069431063eac0
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-16T19:06:12Z

    minor fixes

commit 4123528cf4695b05235789ebfca3a63e8a832ffa
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-18T17:55:02Z

    Merge branch 'trunk' of https://git-wip-us.apache.org/repos/asf/kafka into K3104

commit 46e8c8d285c0afae6da9ec7437d082060599f3f1
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-18T19:15:47Z

    add wordcount and pipe jobs

commit 582d3ac24bfe08edb1c567461971cd35c1f75a00
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-18T21:53:21Z

    merge from trunk

commit 5a002fadfcf760627274ddaa016deeaed5a3199f
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-19T00:06:34Z

    1. WallClockTimestampExtractor as default; 2. remove windowMS config; 3. override state
dir with jobId prefix;

commit 7425673e523c42806b29a364564a747443712a53
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-19T01:26:11Z

    Add PageViewJob

commit ca04ba8d18674c521ad67872562a7671cb0e2c0d
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-19T06:23:05Z

    minor changes on topic names

commit 563cc546b3a0dd16d586d2df33c37d2c5a5bfb18
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-19T21:30:11Z

    change config importance levels

commit 4218904505363e61bb4c6b60dc5b13badfd39697
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-21T00:11:34Z

    Merge branch 'trunk' of https://git-wip-us.apache.org/repos/asf/kafka into K3066

commit 26fb5f3f5a8c9b304c5b1e61778c6bc1d9d5fccb
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-21T06:43:04Z

    demo examples v1

commit 6d92a55d770e058183daabb7aaef7675335fbbad
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T00:41:12Z

    Merge branch 'trunk' of https://git-wip-us.apache.org/repos/asf/kafka into K3066

commit 929e405058eb61d38510120f3f3ed50cd0cfaf47
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T01:02:04Z

    add RollingRocksDBStore

commit 324eb584b97ed3c228347d108d697d2f5133ea99
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T01:23:32Z

    modify MeteredWindowStore

commit 7ba2d90fe1de1ca776cea23ff1c2e8f8b3a6c3f2
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T01:35:10Z

    remove getter

commit a4d78bac9d84dfd1c7dab4ae465b9115ddc451b3
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T01:36:51Z

    remove RollingRocksDB

commit d0e8198ac6a25315d7ab8d21894acf0077f88fde
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T17:24:32Z

    adding cache layer on RocksDB

commit 257b53d3b6df967f8a015a06c9e178d4219d0f8c
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T23:15:08Z


commit 25fd73107c577ac2e4b32300d4fe132ad7ff7312
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T23:21:29Z

    merge from trunk

commit e57abf3c117d4ea7398c6157983d75443194ce9f
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T23:29:59Z

    merge from demo example changes again

commit a0caee14d4a7b77045d9813a1072143db0fc8fa1
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-22T23:50:19Z

    resolve conflicts

commit 5501e6fef16fdef55cb2136d8c3f8035d394d79f
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-26T17:12:12Z

    Merge branch 'trunk' of https://git-wip-us.apache.org/repos/asf/kafka into K3060

commit d73b594147d1b4e25a61497550f498b9f14822a0
Author: Guozhang Wang <wangguoz@gmail.com>
Date:   2016-01-26T19:04:11Z

    move logging to rocksDBStore


> Refactor MeteredXXStore
> -----------------------
>                 Key: KAFKA-3060
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3060
>             Project: Kafka
>          Issue Type: Sub-task
>          Components: kafka streams
>    Affects Versions:
>            Reporter: Yasuhiro Matsuda
>            Priority: Minor
> ** copied from a github comment by Guozhang Wang **
> The original motivation of having the MeteredXXStore is to wrap all metrics / logging
semantics into one place so they do not need to be re-implemented again, but this seems to
be an obstacle with the current pattern now, for example MeteredWindowStore.putAndReturnInternalKey
is only used for logging, and MeteredWindowStore.putInternal / MeteredWindowStore.getInternal
are never used since only its inner will trigger this function. So how about refactoring this
piece as follows:
> 1. WindowStore only expose two APIs: put(K, V) and get(K, long).
> 2. Add a RollingRocksDBStores that does not extend any interface, but only implements
putInternal, getInternal and putAndReturnInternalKey that uses underlying RocksDBStore<byte[],
byte[]> as Segments.
> 3. RocksDBWindowStore implements WindowStore with an RollingRocksDBStores inner.
> 4. Let MeteredXXStore only maintain the metrics recording logic, and let different stores
implement their own logging logic, since this is now different across different types and
are better handled separately. Also some types of stores may not even have a loggingEnabled
flag, if it will always log, or will never log.

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