[jira] [Created] (IGNITE-3637) MemoryEventStorageSpi should not be used by default

[Anton Vinogradov (Jira)]

Valentin Kulichenko created IGNITE-3637:
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             Summary: MemoryEventStorageSpi should not be used by default
                 Key: IGNITE-3637
                 URL: https://issues.apache.org/jira/browse/IGNITE-3637
             Project: Ignite
          Issue Type: Improvement
          Components: general
    Affects Versions: 1.7
            Reporter: Valentin Kulichenko
             Fix For: 1.8


The main use case for events if listening for them in real time. This does not require any storage, but we use {{MemoryEventStorageSpi}} by default which consumes memory.

We should:
* Create {{NoOpEventStorageSpi}} and make it the default one.
* If the new SPI is used, print out a warning saying that {{IgniteEvents.localQuery}} and {{remoteQuery}} methods will not work. If one of these methods is called, throw an exception.
* Test Visor, as it can depend on events in some places.



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