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From "Bill Farner" <wfar...@apache.org>
Subject Re: Review Request 25529: Add a controller for job updates.
Date Fri, 12 Sep 2014 21:38:18 GMT


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/InstanceActionHandler.java, line
111
> > <https://reviews.apache.org/r/25529/diff/1/?file=685011#file685011line111>
> >
> >     Instead of embedding the logic into a switch here, would it make sense to make
InstanceAction an actual class that encapsulates the logic/defines an interface around performing
these actions?

A fine suggestion!  It resulted in more code, but it's overall cleaner, thanks!


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/InstanceActionHandler.java, line
113
> > <https://reviews.apache.org/r/25529/diff/1/?file=685011#file685011line113>
> >
> >     use instanceName here?

Nuked with switch to IInstanceKey.


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/InstanceActionHandler.java, line
141
> > <https://reviews.apache.org/r/25529/diff/1/?file=685011#file685011line141>
> >
> >     Should we log (or assert?) here? Are there other actions that we're intentionally
not processing, or is it an error if we get an action not covered?

Goes away now that switch statement is gone.


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/InstanceUpdater.java, line 119
> > <https://reviews.apache.org/r/25529/diff/1/?file=685012#file685012line119>
> >
> >     Is there a ticket for this?

Whoops, that was a reminder for myself, fixed in this diff.  Removed TODO.


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/JobUpdateControllerImpl.java,
line 141
> > <https://reviews.apache.org/r/25529/diff/1/?file=685014#file685014line141>
> >
> >     I don't know if the amount of work done by the underlying calls warrants it,
but you could DRY this up a bit by having instance vars for `storeProvider.getJobUpdateStore()`
(used here, and above) and `update.getSummary()` (used twice below and once above). If you
wanted to go completely overboard, `update.getSummary().getJobKey()` is used above and below.

They're all accessors.  I've done a bit of collapsing, trying for a balance between more code
and more DRY.


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/JobUpdateControllerImpl.java,
line 159
> > <https://reviews.apache.org/r/25529/diff/1/?file=685014#file685014line159>
> >
> >     It seems like the logic of what states to transition to from a given state is
somewhat spread out over the codebase (c.f. https://reviews.apache.org/r/25300/diff/#)? Is
there any way we can centralize that?

Thanks, i wasn't happy with this.  I've pushed more of this down into JobUpdateStateMachine.


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/JobUpdateControllerImpl.java,
line 300
> > <https://reviews.apache.org/r/25529/diff/1/?file=685014#file685014line300>
> >
> >     Thoughts on changing the Function here to be `Function<JobUpdateStatus, Optional<JobUpdateStatus>>`
to clean up the null dance below?

Sure, done.  Downside is that we lose ability to use Functions.forMap().


> On Sept. 11, 2014, 10:13 p.m., Joshua Cohen wrote:
> > src/main/java/org/apache/aurora/scheduler/updater/JobUpdateControllerImpl.java,
lines 484-488
> > <https://reviews.apache.org/r/25529/diff/1/?file=685014#file685014line484>
> >
> >     Do we need guards in place in case the updaterStatus here is not ROLLING_BACK
or ROLLING_FORWARD (or is it guaranteed to be one of the two? If so, is there danger in the
addition of additional statuses in the future rendering that assumption invalid?)

I've refactored this to eliminate the fall-through branch.  Thanks for the nudge!


- Bill


-----------------------------------------------------------
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https://reviews.apache.org/r/25529/#review53101
-----------------------------------------------------------


On Sept. 11, 2014, 4:53 a.m., Bill Farner wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/25529/
> -----------------------------------------------------------
> 
> (Updated Sept. 11, 2014, 4:53 a.m.)
> 
> 
> Review request for Aurora, Joshua Cohen, Kevin Sweeney, Maxim Khutornenko, and Zameer
Manji.
> 
> 
> Bugs: AURORA-613
>     https://issues.apache.org/jira/browse/AURORA-613
> 
> 
> Repository: aurora
> 
> 
> Description
> -------
> 
> There's a lot going on here, i'm happy to break this up if you'd perfer, but the bulk
of the change (JobUpdateControllerImpl+Test) would remain.
> 
> The remaining required piece here is to record JobInstanceUpdateEvents when actions are
taken.
> 
> As you try to follow JobUpdateControllerImplTest, take some care to understand how FakeScheduledExecutor
works.  Ultimately, it accepts work added to a mock, and executes that work when FakeClock
is advanced past the scheduled time.  It may not be obvious at first, but be glad it's there
- this kind of async test would be a nightmare without it.
> 
> 
> Diffs
> -----
> 
>   build.gradle 3237f8dfa3e7d4249a388042dba840a939d513b3 
>   src/main/java/org/apache/aurora/scheduler/async/RescheduleCalculator.java aaa3513ae99c70ffa51fec0a241d67fb815b6d3f

>   src/main/java/org/apache/aurora/scheduler/base/Jobs.java 7b10cf876d4424fab06113aa3e2989a6bef4d346

>   src/main/java/org/apache/aurora/scheduler/base/Query.java d8572bb21a92025e7a51cf18d5bdf00fc1281078

>   src/main/java/org/apache/aurora/scheduler/base/Tasks.java 1be16374aeebaee59063aec982690ffa1fbdcf0f

>   src/main/java/org/apache/aurora/scheduler/state/LockManagerImpl.java 8befecaf4f13c0b890b452bc7b9c0618725b8c41

>   src/main/java/org/apache/aurora/scheduler/storage/ForwardingStore.java b894a71348d2d71c077f35bb21a80ba88a6b4c42

>   src/main/java/org/apache/aurora/scheduler/storage/JobUpdateStore.java 599dbd8bb762d051b75aa1a1e4d6a4c90ca6eb87

>   src/main/java/org/apache/aurora/scheduler/storage/db/DBJobUpdateStore.java ec9b37ccaf03651e986aab9b4541f17ff0540008

>   src/main/java/org/apache/aurora/scheduler/thrift/SchedulerThriftInterface.java a43e5d7748c22d60f56f03a8a3d52949faebeff2

>   src/main/java/org/apache/aurora/scheduler/updater/InstanceActionHandler.java PRE-CREATION

>   src/main/java/org/apache/aurora/scheduler/updater/InstanceUpdater.java d725bc356178f51464b4d8ea896f1bf76815e1b2

>   src/main/java/org/apache/aurora/scheduler/updater/JobUpdateController.java 39bdca02295706714cf720545ffc291f9042702a

>   src/main/java/org/apache/aurora/scheduler/updater/JobUpdateControllerImpl.java 3f542ce3e45ec4561238736f4ce84b69f7e41219

>   src/main/java/org/apache/aurora/scheduler/updater/JobUpdateEventSubscriber.java 7be792f0bc9c5ec14c7001cb243a17d643f9607f

>   src/main/java/org/apache/aurora/scheduler/updater/JobUpdateStateMachine.java 037602d6aabe6dda978cad008075c053e2c042eb

>   src/main/java/org/apache/aurora/scheduler/updater/OneWayJobUpdater.java d6a1e4b2c916b1c4dbcc73fe79bd672fca9b3189

>   src/main/java/org/apache/aurora/scheduler/updater/OneWayJobUpdaterFactory.java 80baa7f9360cc8b2bf7910c26d119d443d6cbbf9

>   src/main/java/org/apache/aurora/scheduler/updater/UpdateConfigurationException.java
PRE-CREATION 
>   src/main/java/org/apache/aurora/scheduler/updater/UpdaterModule.java 028cb079316ca48bb93a35913ae25ace78088fb4

>   src/main/java/org/apache/aurora/scheduler/updater/strategy/ActiveLimitedStrategy.java
8298ea2283298daa71de4d958ca6bb0898d47531 
>   src/main/java/org/apache/aurora/scheduler/updater/strategy/BatchStrategy.java a3e666e85993b833a4765ce0ad5f4825dc9253e8

>   src/main/java/org/apache/aurora/scheduler/updater/strategy/QueueStrategy.java 0cf36839dbf64ad755383bef829e14fd94a97e30

>   src/main/thrift/org/apache/aurora/gen/api.thrift c00f94371a27ffab41188b22f81bb1c8ec7a57e9

>   src/test/java/org/apache/aurora/scheduler/storage/db/DBJobUpdateStoreTest.java 0be4d78dd737b34f8a58276be9ffd7aeaa7f95bb

>   src/test/java/org/apache/aurora/scheduler/thrift/SchedulerThriftInterfaceTest.java
0d51f7dc367081f72090736e36605bf363f3395e 
>   src/test/java/org/apache/aurora/scheduler/updater/FakeScheduledExecutor.java PRE-CREATION

>   src/test/java/org/apache/aurora/scheduler/updater/InstanceActionHandlerTest.java PRE-CREATION

>   src/test/java/org/apache/aurora/scheduler/updater/InstanceUpdaterTest.java f38e6a3e6a798b1c78d73c6d19404156eb6d8c91

>   src/test/java/org/apache/aurora/scheduler/updater/JobUpdateEventSubscriberTest.java
41274421aaae30b43abc3da15a63276a941094f9 
>   src/test/java/org/apache/aurora/scheduler/updater/JobUpdateStateMachineTest.java 6eed641895123d21ed760fa755ce7b30cec3fd44

>   src/test/java/org/apache/aurora/scheduler/updater/JobUpdaterIT.java PRE-CREATION 
>   src/test/java/org/apache/aurora/scheduler/updater/OneWayJobUpdateControllerTest.java
f0b68350ea39e5925a911e46532982c3d61ee0d6 
>   src/test/java/org/apache/aurora/scheduler/updater/OneWayJobUpdaterFactoryImplTest.java
ae654625370fd3ba8be59b9a37ba343ec7115cba 
>   src/test/java/org/apache/aurora/scheduler/updater/strategy/BatchStrategyTest.java e6742dcbe101389710c11e9b75a508f7b61ffe49

>   src/test/java/org/apache/aurora/scheduler/updater/strategy/QueueStrategyTest.java f9a2806708ea1a06a4f0ebe118c777fd9dbe2dcc

> 
> Diff: https://reviews.apache.org/r/25529/diff/
> 
> 
> Testing
> -------
> 
> ./gradlew build -Pq
> 
> Jacoco reports 98% line coverage, 96% branch coverage for the updater package.
> 
> 
> Thanks,
> 
> Bill Farner
> 
>


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