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https://issues.apache.org/jira/browse/MESOS-3067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15306785#comment-15306785
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Anand Mazumdar commented on MESOS-3067:
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+1 to what Vinod said.
Also, there have been other suggested alternatives like using
{{Content-Encoding}} and setting it to {{RecordIO}}. I don't quite like that
idea since {{RecordIO}} is an _application_ level detail and not how the
content was actually encoded over the wire as {{Content-Encoding}} seems to
suggest.
Since this JIRA is already resolved, I would encourage having this discussion
on MESOS-3601 that caters explicitly to formalizing such headers.
> Implement a streaming response decoder for events stream
> --------------------------------------------------------
>
> Key: MESOS-3067
> URL: https://issues.apache.org/jira/browse/MESOS-3067
> Project: Mesos
> Issue Type: Task
> Reporter: Anand Mazumdar
> Assignee: Benjamin Mahler
> Fix For: 0.24.0
>
>
> We need a streaming response decoder to de-serialize chunks sent from the
> master on the events stream.
> From the HTTP API design doc:
> Master encodes each Event in RecordIO format, i.e. a string representation of
> length of the event in bytes followed by JSON or binary Protobuf (possibly
> compressed) encoded event.
> As of now for getting the basic features right , this is being done in the
> test-cases:
> {code}
> auto reader = response.get().reader;
> ASSERT_SOME(reader);
> Future<std::string> eventFuture = reader.get().read();
> AWAIT_READY(eventFuture);
> Event event;
> event.ParseFromString(eventFuture.get());
> {code}
> Two things need to happen:
> - We need master to emit events in RecordIO format i.e. event size followed
> by the serialized event instead of just the serialized events as is the case
> now.
> - The decoder class should then abstract away the logic of reading the
> response and de-serializing events from the stream.
> Ideally, the decoder should work with both "json" and "protobuf" responses.
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