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Example 1 with ConstantQpsDarkClusterStrategy

use of com.linkedin.darkcluster.impl.ConstantQpsDarkClusterStrategy in project rest.li by linkedin.

the class TestConstantQpsDarkClusterStrategy method testStrategy.

@Test(dataProvider = "qpsKeys")
public void testStrategy(int duration, float inboundQps, float outboundQps, int numSourceInstances, int numDarkInstances) {
    IntStream.of(1, 1000, 1000000).forEach(capacity -> {
        DarkClusterDispatcher darkClusterDispatcher = new DefaultDarkClusterDispatcher(new MockClient(false));
        ClockedExecutor executor = new ClockedExecutor();
        Supplier<ConstantQpsRateLimiter> uniqueRateLimiterSupplier = () -> {
            EvictingCircularBuffer uniqueBuffer = TestConstantQpsDarkClusterStrategy.getBuffer(executor);
            ConstantQpsRateLimiter limiter = new ConstantQpsRateLimiter(executor, executor, executor, uniqueBuffer);
            limiter.setBufferCapacity(capacity);
            limiter.setBufferTtl(Integer.MAX_VALUE, ChronoUnit.DAYS);
            return limiter;
        };
        ConstantQpsRateLimiter sharedRateLimiter = uniqueRateLimiterSupplier.get();
        Supplier<ConstantQpsRateLimiter> sharedRateLimiterSupplier = () -> sharedRateLimiter;
        MockClusterInfoProvider mockClusterInfoProvider = new MockClusterInfoProvider();
        mockClusterInfoProvider.putHttpsClusterCount(SOURCE_CLUSTER_NAME, numSourceInstances);
        // dark cluster 1
        BaseDarkClusterDispatcherImpl baseDispatcherOne = new BaseDarkClusterDispatcherImpl(DARK_CLUSTER_NAME_ONE, darkClusterDispatcher, new DoNothingNotifier(), new CountingVerifierManager());
        mockClusterInfoProvider.putHttpsClusterCount(DARK_CLUSTER_NAME_ONE, numDarkInstances);
        ConstantQpsRateLimiter rateLimiterOne = sharedRateLimiterSupplier.get();
        // dark cluster 2
        BaseDarkClusterDispatcherImpl baseDispatcherTwo = new BaseDarkClusterDispatcherImpl(DARK_CLUSTER_NAME_TWO, darkClusterDispatcher, new DoNothingNotifier(), new CountingVerifierManager());
        mockClusterInfoProvider.putHttpsClusterCount(DARK_CLUSTER_NAME_TWO, numDarkInstances);
        ConstantQpsRateLimiter rateLimiterTwo = sharedRateLimiterSupplier.get();
        // dark cluster 3
        BaseDarkClusterDispatcherImpl baseDispatcherThree = new BaseDarkClusterDispatcherImpl(DARK_CLUSTER_NAME_THREE, darkClusterDispatcher, new DoNothingNotifier(), new CountingVerifierManager());
        mockClusterInfoProvider.putHttpsClusterCount(DARK_CLUSTER_NAME_THREE, numDarkInstances);
        ConstantQpsRateLimiter rateLimiterThree = uniqueRateLimiterSupplier.get();
        List<ConstantQpsDarkClusterStrategy> strategies = new ArrayList<>();
        strategies.add(new ConstantQpsDarkClusterStrategy(SOURCE_CLUSTER_NAME, DARK_CLUSTER_NAME_ONE, outboundQps, baseDispatcherOne, new DoNothingNotifier(), mockClusterInfoProvider, rateLimiterOne));
        strategies.add(new ConstantQpsDarkClusterStrategy(SOURCE_CLUSTER_NAME, DARK_CLUSTER_NAME_TWO, outboundQps, baseDispatcherTwo, new DoNothingNotifier(), mockClusterInfoProvider, rateLimiterTwo));
        strategies.add(new ConstantQpsDarkClusterStrategy(SOURCE_CLUSTER_NAME, DARK_CLUSTER_NAME_THREE, outboundQps, baseDispatcherThree, new DoNothingNotifier(), mockClusterInfoProvider, rateLimiterThree));
        // simulate receiving the configured qps while dispatching over the duration
        int msBetweenEachInboundRequest = (int) (1000 / inboundQps);
        for (int runTime = 0; runTime < duration; runTime = runTime + msBetweenEachInboundRequest) {
            RestRequest dummyRestRequest = new RestRequestBuilder(URI.create("foo")).build();
            for (ConstantQpsDarkClusterStrategy strategy : strategies) {
                strategy.handleRequest(dummyRestRequest, dummyRestRequest, new RequestContext());
            }
            executor.runFor(msBetweenEachInboundRequest);
        }
        double validation = ((duration == 0 ? 0 : duration / 1000.0) * outboundQps * numDarkInstances) / (double) (numSourceInstances);
        // Cluster One and Two share a rate limiter, so their combined QPS should match the expected value.
        int actualCountClusterOne = baseDispatcherOne.getRequestCount();
        int actualCountClusterTwo = baseDispatcherTwo.getRequestCount();
        int expectedCountClusterOneAndTwo = (int) validation;
        Assert.assertEquals(actualCountClusterOne + actualCountClusterTwo, expectedCountClusterOneAndTwo, expectedCountClusterOneAndTwo * ERR_PCT, "count not within expected range");
        // Cluster Three uses its own so it matches the expected value on its own.
        int expectedCountClusterThree = (int) validation;
        int actualCountClusterThree = baseDispatcherThree.getRequestCount();
        Assert.assertEquals(actualCountClusterThree, expectedCountClusterThree, expectedCountClusterThree * ERR_PCT, "count not within expected range");
    });
}
Also used : DefaultDarkClusterDispatcher(com.linkedin.darkcluster.impl.DefaultDarkClusterDispatcher) DarkClusterDispatcher(com.linkedin.darkcluster.api.DarkClusterDispatcher) DefaultDarkClusterDispatcher(com.linkedin.darkcluster.impl.DefaultDarkClusterDispatcher) ArrayList(java.util.ArrayList) ClockedExecutor(com.linkedin.test.util.ClockedExecutor) ConstantQpsRateLimiter(com.linkedin.r2.transport.http.client.ConstantQpsRateLimiter) EvictingCircularBuffer(com.linkedin.r2.transport.http.client.EvictingCircularBuffer) RestRequest(com.linkedin.r2.message.rest.RestRequest) RestRequestBuilder(com.linkedin.r2.message.rest.RestRequestBuilder) RequestContext(com.linkedin.r2.message.RequestContext) ConstantQpsDarkClusterStrategy(com.linkedin.darkcluster.impl.ConstantQpsDarkClusterStrategy) BaseDarkClusterDispatcherImpl(com.linkedin.darkcluster.impl.BaseDarkClusterDispatcherImpl) Test(org.testng.annotations.Test)

Aggregations

DarkClusterDispatcher (com.linkedin.darkcluster.api.DarkClusterDispatcher)1 BaseDarkClusterDispatcherImpl (com.linkedin.darkcluster.impl.BaseDarkClusterDispatcherImpl)1 ConstantQpsDarkClusterStrategy (com.linkedin.darkcluster.impl.ConstantQpsDarkClusterStrategy)1 DefaultDarkClusterDispatcher (com.linkedin.darkcluster.impl.DefaultDarkClusterDispatcher)1 RequestContext (com.linkedin.r2.message.RequestContext)1 RestRequest (com.linkedin.r2.message.rest.RestRequest)1 RestRequestBuilder (com.linkedin.r2.message.rest.RestRequestBuilder)1 ConstantQpsRateLimiter (com.linkedin.r2.transport.http.client.ConstantQpsRateLimiter)1 EvictingCircularBuffer (com.linkedin.r2.transport.http.client.EvictingCircularBuffer)1 ClockedExecutor (com.linkedin.test.util.ClockedExecutor)1 ArrayList (java.util.ArrayList)1 Test (org.testng.annotations.Test)1