Commit Graph

31 Commits

Author SHA1 Message Date
Daniel Nephin ffefcdc025 streaming: support X-Cache-Hit header
If a value was already available in the local view the request is considered a cache hit.
If the materialized had to wait for a value, it is considered a cache miss.
2021-06-28 17:29:23 -04:00
Daniel Nephin b5503223ae submatview: add test cases for store.Get with timeout and no index
Also set a more unique name for the serviceRequest.Type to prevent potential name conflicts
in the future.
2021-06-08 18:04:38 -04:00
Daniel Nephin b8717966f1 submatview: and Store integration test with stream backend 2021-06-08 12:15:35 -04:00
Daniel Nephin 4fb6c5a137 submatview: fix a bug with Store.Get
When info.Timeout is 0, it should have no timeout. Previously it was using a 0 duration timeout
which caused it to return without waiting.

This bug was masked by using a timeout in the tests. Removing the timeout caused the tests to fail.
2021-06-03 17:48:44 -04:00
Daniel Nephin 2dcfe4a0d5 submatview: improve a couple comments 2021-06-01 17:49:31 -04:00
Daniel Nephin 65da18a986 submatview: fix godoc and comment typos
Co-authored-by: Paul Banks <banks@banksco.de>
2021-04-28 12:27:38 -04:00
Daniel Nephin 872bb9db14 submatview: avoid sorting results unnecessarily
Previous getFromView would call view.Result when the result may not have been returned
(because the index is updated past the minIndex. This would allocate a slice and sort it
for no reason, because the values would never be returned.

Fix this by re-ordering the operations in getFromView.

The test changes in this commit were an attempt to cover the case where
an update is received but the index does not exceed the minIndex.
2021-04-27 19:03:17 -04:00
Daniel Nephin cf8520d85c submatview: only return materializer from getEntry
Also rename it to readEntry now that it doesn't return the entire entry. Based on feedback
in PR review, the full entry is not used by the caller, and accessing the fields wouldn't be
safe outside the lock, so it is safer to return only the Materializer
2021-04-27 19:03:17 -04:00
Daniel Nephin 768e0a7d03 submatview: godoc 2021-04-27 19:03:17 -04:00
Daniel Nephin 2dfacb2d49 rpcclient/health: convert tests to the new submatview.Store interface
Also fixes a minor data race in Materializer. Capture the error before
releasing the lock.
2021-04-27 19:03:17 -04:00
Daniel Nephin 43b14bf57f submatview: fix two flaky tests
These tests can flake when we get a notification for an earlier event.
Retry the read from update channel a few times to make sure we get the
event we expect.
2021-04-27 19:03:17 -04:00
Daniel Nephin 8f47bbe89a rpcclient:health: fix a data race and flake in tests
Split the TestStreamingClient into the two logical components the real
client uses. This allows us to test multiple clients properly.

Previously writing of ctx from multiple Subscribe calls was showing a
data race.

Once this was fixed a test started to fail because the request had to be
made with a greater index, so that the store.Get call did not return
immediately.
2021-04-27 19:03:17 -04:00
Daniel Nephin 95c92343e4 rpcclient/health: fix data race in a test
The idleTTL was being written and read concurrently. Instead move the idleTTL to a struct
field so that when one test patches the TTL it does not impact others.

The background goroutines for the store can outlive a test because context cancellation
is async.
2021-04-27 19:03:17 -04:00
Daniel Nephin 440ab3e0ae submatview: move error return to NewMaterializer
So that we don't have to create views ahead of time, when we will never use that view.
2021-04-27 19:03:16 -04:00
Daniel Nephin 31c9519712 submatview: test Store.Run 2021-04-27 19:03:16 -04:00
Daniel Nephin d23fd66aeb submatview: test store with Get and Notify calls together 2021-04-27 19:03:16 -04:00
Daniel Nephin 54a402d772 submatview: more test cases for Store.Get
And simplify the return value by using a Result type.
2021-04-27 19:03:16 -04:00
Daniel Nephin f7190b1c61 submatview: reduce the getFromView implementation
Remove View.Result error return value, it was always nil, and seems like it will likely always remain nill
since it is simply reading a stored value.

Also replace some cache types with local types.
2021-04-27 19:03:16 -04:00
Daniel Nephin f4573177ba submatview: track requests instead of notifiers
And only start expiration time when the last request ends. This makes tracking expiry simpler, and
ensures that no entry can be expired while there are active requests.
2021-04-27 19:03:16 -04:00
Daniel Nephin 468469bd27 submatview: set up expiry of materializers 2021-04-27 19:03:16 -04:00
Daniel Nephin f46a830e48 submatview: setup testing structure 2021-04-27 19:03:16 -04:00
Daniel Nephin e4c503c28e submatview: rough outline of the Get and Notify methods. 2021-04-27 19:03:16 -04:00
Daniel Nephin c23e98a5e6 submatview: setup the interface for the store 2021-04-27 19:03:15 -04:00
Daniel Nephin 3ab546623f submatview: do not reset retry waiter when materializer is reset
The materializer is often reset when an error is received. By resetting
the retryWaiter we effectively never wait. The retryWaiter should only
be reset when we get an event without error. This is done in
Materializer.updateView().
2021-02-09 13:56:50 -05:00
Daniel Nephin 83401194ab streaming: improve godoc for cache-type
And fix a bug where any error that implemented the temporary interface was considered
a temporary error, even when the method would return false.
2020-10-06 13:52:02 -04:00
Daniel Nephin bda19cb71e submatview: remove notifyUpdateLocked from reset
This call appears to only be necessary because reset() was called from
NewMaterializer.

This commit has the constructor set a default value for updateCh, and
removes both the call to reset() from New(), and the call to
notifyUpdateLocked() from reset().

This should ensure that we do not notify the Fetch() call before we have new
values to report.
2020-10-06 13:22:02 -04:00
Daniel Nephin e5813bd9d6 submatview: remove method receiver from handlers 2020-10-06 13:22:02 -04:00
Daniel Nephin f857aef4a8 submatview: add a test for handling of NewSnapshotToFollow
Also add some godoc
Rename some vars and functions
Fix a data race in the new cache test for entry closing.
2020-10-06 13:22:02 -04:00
Daniel Nephin 58cf09247b submatview: refactor Materializer
Refactor of Materializer.Run
Use handlers to manage state in Materializer
Rename Materializer receiver
rename m.l to m.lock, and flip some conditionals to remove the negative.
Improve godoc, rename Deps, move resetErr, and pass err into notifyUpdate
Update for NewSnapshotToFollow events
Refactor to move context cancel out of Materializer
2020-10-06 13:22:02 -04:00
Daniel Nephin e8c7881196 submatview: Move the 'use materialize from result.State' logic
No need to do all this other work if we have one already.

This logic moved closer to this call site 3 times during the process
of refactoring.
2020-10-06 13:22:02 -04:00
Daniel Nephin 3bb252888b submatview: Move Materializer to submatview package 2020-10-06 13:22:02 -04:00