> On April 22, 2016, 6:15 p.m., Jayush Luniya wrote:
> >
> 
> Alexander Denissov wrote:
>     So, what will be the rules for SA logic inheritance ?
>     
>     When MYSERVICE/2.0.0 ships and needs to reuse the stack_advisor logic 
> from MYSERVICE/1.0.0 -- will we:
>     - rely on stack inheritance ?
>     - rely on SA inheritance within MYSERVICE ?
>     - combination of these ?

There will be no implicit inheritance.  If you want to use inheritance you can 
but it will be left up to the service to handle it with code like:

SCRIPT_DIR = os.path.dirname(os.path.abspath(file))
PARENT_DIR = os.path.join(SCRIPT_DIR, '../../../2.2/services/YARN/')
PARENT_FILE = os.path.join(PARENT_DIR, 'service_advisor.py')

try:
  with open(PARENT_FILE, 'rb') as fp:
    service_advisor = imp.load_module('service_advisor', fp, PARENT_FILE, 
('.py', 'rb', imp.PY_SOURCE))
except Exception as e:
  traceback.print_exc()
  print "Failed to load parent"


class 
HDP23MAPREDUCE2ServiceAdvisor(service_advisor.HDP22MAPREDUCE2ServiceAdvisor):


- Tim


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On April 22, 2016, 6:27 p.m., Tim Thorpe wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/44210/
> -----------------------------------------------------------
> 
> (Updated April 22, 2016, 6:27 p.m.)
> 
> 
> Review request for Ambari, Alexander Denissov, bhuvnesh chaudhary, Jayush 
> Luniya, Oleksandr Diachenko, Sumit Mohanty, Srimanth Gunturi, and Yusaku Sako.
> 
> 
> Bugs: AMBARI-15226
>     https://issues.apache.org/jira/browse/AMBARI-15226
> 
> 
> Repository: ambari
> 
> 
> Description
> -------
> 
> Currently the stack advisor is defined under each stack version such as 
> HDP/2.3. The problem with this is that it restricts the services that can be 
> added to the stack. If a custom service is to be added, they would need to 
> modify the stack advisor. If the configuration recommendation and validation 
> can be done at the service level then the custom service could just include 
> their own recommendations and validations separately.
> 
> 
> Diffs
> -----
> 
>   ambari-server/src/main/assemblies/server.xml e1a4919 
>   
> ambari-server/src/main/java/org/apache/ambari/server/api/services/AmbariMetaInfo.java
>  df65010 
>   
> ambari-server/src/main/java/org/apache/ambari/server/api/services/stackadvisor/commands/StackAdvisorCommand.java
>  00c8696 
>   
> ambari-server/src/main/java/org/apache/ambari/server/controller/StackServiceResponse.java
>  ca1968e 
>   
> ambari-server/src/main/java/org/apache/ambari/server/controller/internal/StackServiceResourceProvider.java
>  6c6fa91 
>   
> ambari-server/src/main/java/org/apache/ambari/server/stack/CommonServiceDirectory.java
>  636de37 
>   
> ambari-server/src/main/java/org/apache/ambari/server/stack/ServiceDirectory.java
>  d574d60 
>   
> ambari-server/src/main/java/org/apache/ambari/server/stack/ServiceModule.java 
> b7e09a9 
>   
> ambari-server/src/main/java/org/apache/ambari/server/stack/StackServiceDirectory.java
>  d27e52a 
>   ambari-server/src/main/java/org/apache/ambari/server/state/ServiceInfo.java 
> db95fec 
>   
> ambari-server/src/main/resources/common-services/HAWQ/2.0.0/service_advisor.py
>  PRE-CREATION 
>   
> ambari-server/src/main/resources/common-services/PXF/3.0.0/service_advisor.py 
> PRE-CREATION 
>   ambari-server/src/main/resources/properties.json eac0dbd 
>   ambari-server/src/main/resources/stacks/HDP/2.0.6/services/stack_advisor.py 
> 0130483 
>   ambari-server/src/main/resources/stacks/HDP/2.3/services/stack_advisor.py 
> 3a65541 
>   ambari-server/src/main/resources/stacks/service_advisor.py PRE-CREATION 
>   ambari-server/src/main/resources/stacks/stack_advisor.py 539bd25 
>   ambari-server/src/test/python/stacks/2.3/common/test_stack_advisor.py 
> 6c9fd46 
> 
> Diff: https://reviews.apache.org/r/44210/diff/
> 
> 
> Testing
> -------
> 
> Ran all the non java unit tests.  
> 
> Total run:945
> Total errors:0
> Total failures:0
> 
> Manually configured HAWQ and PXF as part of the HDP 2.3 stack and made sure 
> their service advisors were called.
> 
> 
> Thanks,
> 
> Tim Thorpe
> 
>

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