[jira] [Created] (GEODE-7184) Add function executions timer

["Aaron Lindsey (Jira)" <ji...@apache.org>]

Aaron Lindsey created GEODE-7184:
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             Summary: Add function executions timer
                 Key: GEODE-7184
                 URL: https://issues.apache.org/jira/browse/GEODE-7184
             Project: Geode
          Issue Type: Improvement
            Reporter: Aaron Lindsey


Developers oftentimes deploy their own functions to the system to enable decorator pattern for caching to add information to specific key/value pairs. In doing so, they can introduce bottlenecks into the system where server-side functions can cause issues or make things slower than intended. We want a way that users can view functions that they create, and see what the average execution time looks like.
 * *Meter Type*: Timer
 * *Name*: geode.function.executions
 * *Description*: TBD
 * *Tags*: <common_tags>, function (getId on function, if DNE present getClass.getname of deployed function), succeeded (true/false)

h3. Acceptance Criteria

*Meter creation/deletion*: Create meter on function deployment/register, delete on un-deploy/unregister of a function or re-deploy of the same function
 *Measurement*: On an individual server, start the timer when a **USER** deployed function is invoked, and stop the timer when the user function completes OR errors. If it throws a Function Execution or another error then the tag function.isSuccessful=false

Details on Functions and their execution: [https://gemfire.docs.pivotal.io/97/geode/developing/function_exec/function_execution.html]

*Scenario: The timers are created when the function is deployed*
Given a user deployed function with ID functionToTime exists on a cluster with 1 locator/1 server
And functionToTime has not been triggered
Then the server has the following timer:
- name: geode.function.executions
- tag: id = functionToTime
- tag: succeeded = true
- count = 0
- totalTime = 0

And the server has the following timer:
- name: geode.function.executions
- tag: id = functionToTime
- tag: succeeded = false
- count = 0
- totalTime = 0

*Scenario: Successful singular function execution*
 Given a user deployed function with ID functionToTime (that waits for 5 seconds) exists on a cluster with 1 locator/1 server
 When functionToTime is triggered using gfsh command: "execute function --id=functionToTime"
 And the function completes without error
 Then the server has the following timer:
 - name: geode.function.executions
 - tag: id = functionToTime
 - tag: succeeded = true
 - count = 1
 - totalTime >= 5,000,000,000ns

*Scenario: Singular function execution with Any Exception*
 Given a user deployed function with ID functionToTime exists on a cluster with 1 locator /1 server
 When that function execution is triggered using gfsh command: "execute function --id=functionToTime"
 And the function exits with a Any exception error after running for 5 seconds
 Then the server has the following timer:
 - name: geode.function.executions
 - tag: id = functionToTime
 - tag: succeeded = false
 - count = 1
 - totalTime >= 5,000,000,000ns

*Scenario: Function execution on multi-servers*
 Given a user deployed function with ID functionToTime (that waits for 5 seconds) is deployed with 'onRegion' to a replicate region named RR1
 And exists on both servers of a cluster with 1 locator (named L1) as well as 2 servers (named S1,S2)
 When that function execution is triggered against that replicate region using gfsh command: "execute function --id=functionToTime --region=RR1"
 Then one server has the following timer:
 - name: geode.function.executions
 - tag: id = functionToTime
 - tag: succeeded = true
 - count = 1
 - totalTime >= 5,000,000,000ns

 And the other server has the following timer:
 - name: geode.cache.function.executions
 - tag: id = functionToTime
 - tag: succeeded = true
 - count = 0
 - totalTime = 0}}

*Scenario: Function execution multiple times*
 Given a user deployed function with ID functionToTime (that waits for 5 seconds) is deployed with 'onRegion' to a replicate region
 And exists on both servers of a cluster with 1 locator (named L1) as well as 2 servers (named S1,S2)
 When that function execution is triggered 10 times against that replicate region using gfsh command: "execute function --id=functionToTime --region=RR1 --members=S1"
 Then S1 has the following timer:
 - name: geode.function.executions
 - tag:id = functionToTime
 - tag:succeeded = true
 - count = 10

 And S2 has the following timer:
 - name: geode.cache.function.executions
 - tag:id = functionToTime
 - tag:succeeded = true
 - count = 0

*Scenario: The timers are deleted when the function is undeployed*
 Given a user deployed function with ID functionToTime exists on a cluster with 1 locator/1 server
 When the user undeploys the function by `undeploy --jar=<tbd>.jar`
 Then the server does not have any timer with the following name and tag:
 - name: geode.function.executions
 - tag: id = functionToTime

*Scenario: Non-user deployed functions shouldn't count*
 Given a cluster with 1 locator/1 server
 When the system starts up the cache with internal functions
 Then the server does not have any timer with the following name:
 - name: geode.function.executions



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