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ASF GitHub Bot commented on STORM-200:
--------------------------------------
Github user revans2 commented on the pull request:
https://github.com/apache/incubator-storm/pull/38#issuecomment-36027319
The code also seems to have missed ShellSpout.java.
> Proposal for Multilang's Metrics feature
> ----------------------------------------
>
> Key: STORM-200
> URL: https://issues.apache.org/jira/browse/STORM-200
> Project: Apache Storm (Incubating)
> Issue Type: New Feature
> Reporter: DashengJu
> Priority: Minor
>
> Storm 0.9.0.1 exposes a metrics interface to report summary statistics across the full
topology. We can build our own metric, and build metrics consumer to use those statistics.
> But when we use Multilang(ie. Python), we can not use this feature. So we want to summit
a proposal for multilang's metrics.
> The specifics of the proposal:
> 1. The main idea is: when user want to add a metric statistics in multilang(python) bolt，
> a) he need first create a metric object and register in ShellBolt's sub-class,
> b) then update the metric in Python bolt process through RPC call.
> 2. In Metrics API:
> a) extend IMetric interface add a method for RPC call：public void updateMetricFromRPC(List<Object>
params);
> b) modify IMetric implements, to support updateMetricFromRPC;
> 3. In ShellBolt，
> a) we have a Map<String, IMetric> to hold user's registered metrics object；
> b) we have a method registerMetric(String name, T metric) for user to register their
metris object;
> c) we have a method handleMetrics(Map action) to handle RPC call from Python process；
> 4) In Multilang protocol: add a command "metrics" for shell process to make RPC call.
The protocol is: {"command":"metrics", "name":"metric-registerd-name", "params":["param-1",
param-2]}
> 5) In storm.py：add rpcMetrics(name, params), user can update remote metric through
this RPC call.
> any suggestions?
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