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From Zach Richardson <j.zach.richard...@gmail.com>
Subject Re: Trying to write tests for CASSANDRA-3127 (Internode Compression)
Date Wed, 26 Oct 2011 20:18:20 GMT
Nick,

Thanks for the reply!

I ended up creating a custom IVerbHandler to receive the messages from
MessagingService, and when I created messages, I set their from field
to an address != localhost, so they did not get optimized.  This
appeared to work!

Thanks again.

Zach

On Mon, Oct 24, 2011 at 10:25 AM, Nick Bailey <nick@datastax.com> wrote:
> Not sure if you saw this, but org.apache.cassandra.net.sink has a
> SinkManager class and an interface for implementing message sinks. Basically
> it lets you catch messages as they are being sent or received by
> MessagingService.
>
> Could be useful, and is used in a couple other tests.
>
> On Sun, Oct 23, 2011 at 11:54 AM, Zach Richardson <zach@raveldata.com>wrote:
>
>> Thanks,
>>
>> Will give these a shot.
>>
>> On Sun, Oct 23, 2011 at 11:18 AM, Jonathan Ellis <jbellis@gmail.com>
>> wrote:
>>
>> > I see a couple options.
>> >
>> > StorageProxy has this constant:
>> >
>> >    private static final boolean OPTIMIZE_LOCAL_REQUESTS = true; //
>> > set to false to test messagingservice path on single node
>> >
>> > So, you could make it an instance variable and create a SP object with
>> > it set to false for tests.
>> >
>> > Or, you could do a test using ccm for multinode control, as in the
>> > long_read.sh test on
>> > https://issues.apache.org/jira/browse/CASSANDRA-3303.
>> >
>> > On Fri, Oct 21, 2011 at 4:28 PM, Zach Richardson
>> > <j.zach.richardson@gmail.com> wrote:
>> > > Hi All,
>> > >
>> > > I have been working on an implementation for internode compression
>> > > (CASSANDRA-3127.) https://issues.apache.org/jira/browse/CASSANDRA-3127
>> > >
>> > > I have written code that "works," but I'm looking for some advice on
>> > > how to write unit tests for it.  At the moment it compresses where:
>> > >
>> > > interrnode_message_compression_threshold > 0 means it compress
>> > > messages larger than it
>> > > compresses all messags if it is == 0
>> > > and compresses none if less than 0
>> > >
>> > > The code itself has been tested in an environment outside of cassandra
>> > > (i.e. a few mock classes, and a heavily modified OutboundTcpConnection
>> > > and IncomingTcpConnection.) and inside of Cassandra all of the current
>> > > unit tests are passing.
>> > >
>> > > Since I can't inject a mocked MessagingService into
>> > > IncomingTcpConnection, I'm guessing I have to do the testing from the
>> > > outside of MessagingService, but the MessagingService itself checks to
>> > > see if you are sending messages to yourself, and doesn't put them over
>> > > the connection.  Are there any tricks to letting me mock different
>> > > endpoints from within a unit test?
>> > >
>> > > Can this only be tested in a distributed fashion at the OS level?
>> > >
>> > > Also the internode_message_compression_threshold is set through the
>> > > cassandra.yaml file--is it possible to set these properties at
>> > > runtime?  Can I just change the public entry for it in the static
>> > > Config class directly, or will that break other things?
>> > >
>> > > Thanks for you help and time,
>> > >
>> > > Zach
>> > >
>> >
>> >
>> >
>> > --
>> > Jonathan Ellis
>> > Project Chair, Apache Cassandra
>> > co-founder of DataStax, the source for professional Cassandra support
>> > http://www.datastax.com
>> >
>>
>>
>>
>> --
>> Zach Richardson
>> Ravel, Co-founder
>> Austin, TX
>> zach@raveldata.com
>> 512.825.6031
>>
>

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