Examples with SpeculativeExecutionPolicy com.datastax.oss.driver.api.core.specex.SpeculativeExecutionPolicy used on opensource projects

Example 6 with SpeculativeExecutionPolicy

use of com.datastax.oss.driver.api.core.specex.SpeculativeExecutionPolicy in project java-driver by datastax.

the class ContinuousGraphRequestHandlerSpeculativeExecutionTest method should_not_schedule_speculative_executions_if_not_idempotent.

@Test
@UseDataProvider(location = DseTestDataProviders.class, value = "nonIdempotentGraphConfig")
public void should_not_schedule_speculative_executions_if_not_idempotent(boolean defaultIdempotence, GraphStatement<?> statement) {
    GraphRequestHandlerTestHarness.Builder harnessBuilder = GraphRequestHandlerTestHarness.builder().withDefaultIdempotence(defaultIdempotence);
    PoolBehavior node1Behavior = harnessBuilder.customBehavior(node1);
    try (GraphRequestHandlerTestHarness harness = harnessBuilder.build()) {
        SpeculativeExecutionPolicy speculativeExecutionPolicy = harness.getContext().getSpeculativeExecutionPolicy(DriverExecutionProfile.DEFAULT_NAME);
        GraphBinaryModule module = createGraphBinaryModule(harness.getContext());
        new ContinuousGraphRequestHandler(statement, harness.getSession(), harness.getContext(), "test", module, graphSupportChecker).handle();
        node1Behavior.verifyWrite();
        node1Behavior.setWriteSuccess();
        // should not schedule any timeout
        assertThat(harness.nextScheduledTimeout()).isNull();
        verifyNoMoreInteractions(speculativeExecutionPolicy);
        verifyNoMoreInteractions(nodeMetricUpdater1);
    }
}

Example 7 with SpeculativeExecutionPolicy

use of com.datastax.oss.driver.api.core.specex.SpeculativeExecutionPolicy in project java-driver by datastax.

the class ContinuousGraphRequestHandlerSpeculativeExecutionTest method should_stop_retrying_other_executions_if_result_complete.

@Test
@UseDataProvider(location = DseTestDataProviders.class, value = "idempotentGraphConfig")
public void should_stop_retrying_other_executions_if_result_complete(boolean defaultIdempotence, GraphStatement<?> statement) throws Exception {
    GraphRequestHandlerTestHarness.Builder harnessBuilder = GraphRequestHandlerTestHarness.builder().withDefaultIdempotence(defaultIdempotence);
    PoolBehavior node1Behavior = harnessBuilder.customBehavior(node1);
    PoolBehavior node2Behavior = harnessBuilder.customBehavior(node2);
    PoolBehavior node3Behavior = harnessBuilder.customBehavior(node3);
    try (GraphRequestHandlerTestHarness harness = harnessBuilder.build()) {
        SpeculativeExecutionPolicy speculativeExecutionPolicy = harness.getContext().getSpeculativeExecutionPolicy(DriverExecutionProfile.DEFAULT_NAME);
        long firstExecutionDelay = 100L;
        when(speculativeExecutionPolicy.nextExecution(any(Node.class), eq(null), eq(statement), eq(1))).thenReturn(firstExecutionDelay);
        GraphBinaryModule module = createGraphBinaryModule(harness.getContext());
        CompletionStage<AsyncGraphResultSet> resultSetFuture = new ContinuousGraphRequestHandler(statement, harness.getSession(), harness.getContext(), "test", module, graphSupportChecker).handle();
        node1Behavior.verifyWrite();
        node1Behavior.setWriteSuccess();
        // next scheduled timeout should be the first speculative execution. Get it and run it.
        CapturedTimeout speculativeExecution1 = harness.nextScheduledTimeout();
        assertThat(speculativeExecution1.getDelay(TimeUnit.MILLISECONDS)).isEqualTo(firstExecutionDelay);
        speculativeExecution1.task().run(speculativeExecution1);
        node2Behavior.verifyWrite();
        node2Behavior.setWriteSuccess();
        // Complete the request from the initial execution
        node1Behavior.setResponseSuccess(defaultDseFrameOf(singleGraphRow(GraphProtocol.GRAPH_BINARY_1_0, module)));
        assertThatStage(resultSetFuture).isSuccess();
        // node2 replies with a response that would trigger a RETRY_NEXT if the request was still
        // running
        node2Behavior.setResponseSuccess(defaultDseFrameOf(new Error(ProtocolConstants.ErrorCode.IS_BOOTSTRAPPING, "mock message")));
        // The speculative execution should not move to node3 because it is stopped
        node3Behavior.verifyNoWrite();
    }
}

Example 8 with SpeculativeExecutionPolicy

use of com.datastax.oss.driver.api.core.specex.SpeculativeExecutionPolicy in project java-driver by datastax.

the class ContinuousGraphRequestHandlerSpeculativeExecutionTest method should_fail_if_no_more_nodes_and_initial_execution_is_last.

@Test
@UseDataProvider(location = DseTestDataProviders.class, value = "idempotentGraphConfig")
public void should_fail_if_no_more_nodes_and_initial_execution_is_last(boolean defaultIdempotence, GraphStatement<?> statement) throws Exception {
    GraphRequestHandlerTestHarness.Builder harnessBuilder = GraphRequestHandlerTestHarness.builder().withDefaultIdempotence(defaultIdempotence);
    PoolBehavior node1Behavior = harnessBuilder.customBehavior(node1);
    harnessBuilder.withResponse(node2, defaultDseFrameOf(new Error(ProtocolConstants.ErrorCode.IS_BOOTSTRAPPING, "mock message")));
    try (GraphRequestHandlerTestHarness harness = harnessBuilder.build()) {
        SpeculativeExecutionPolicy speculativeExecutionPolicy = harness.getContext().getSpeculativeExecutionPolicy(DriverExecutionProfile.DEFAULT_NAME);
        long firstExecutionDelay = 100L;
        when(speculativeExecutionPolicy.nextExecution(any(Node.class), eq(null), eq(statement), eq(1))).thenReturn(firstExecutionDelay);
        GraphBinaryModule module = createGraphBinaryModule(harness.getContext());
        CompletionStage<AsyncGraphResultSet> resultSetFuture = new ContinuousGraphRequestHandler(statement, harness.getSession(), harness.getContext(), "test", module, graphSupportChecker).handle();
        node1Behavior.verifyWrite();
        node1Behavior.setWriteSuccess();
        // do not simulate a response from node1 yet
        // Run the next scheduled task to start the speculative execution. node2 will reply with a
        // BOOTSTRAPPING error, causing a RETRY_NEXT; but the query plan is now empty so the
        // speculative execution stops.
        // next scheduled timeout should be the first speculative execution. Get it and run it.
        CapturedTimeout speculativeExecution1 = harness.nextScheduledTimeout();
        assertThat(speculativeExecution1.getDelay(TimeUnit.MILLISECONDS)).isEqualTo(firstExecutionDelay);
        speculativeExecution1.task().run(speculativeExecution1);
        // node1 now replies with the same response, that triggers a RETRY_NEXT
        node1Behavior.setResponseSuccess(defaultDseFrameOf(new Error(ProtocolConstants.ErrorCode.IS_BOOTSTRAPPING, "mock message")));
        // But again the query plan is empty so that should fail the request
        assertThatStage(resultSetFuture).isFailed(error -> {
            assertThat(error).isInstanceOf(AllNodesFailedException.class);
            Map<Node, List<Throwable>> nodeErrors = ((AllNodesFailedException) error).getAllErrors();
            assertThat(nodeErrors).containsOnlyKeys(node1, node2);
            assertThat(nodeErrors.get(node1).get(0)).isInstanceOf(BootstrappingException.class);
            assertThat(nodeErrors.get(node2).get(0)).isInstanceOf(BootstrappingException.class);
        });
    }
}

Example 9 with SpeculativeExecutionPolicy

use of com.datastax.oss.driver.api.core.specex.SpeculativeExecutionPolicy in project java-driver by datastax.

the class ContinuousGraphRequestHandlerSpeculativeExecutionTest method should_schedule_speculative_executions.

@Test
@UseDataProvider(location = DseTestDataProviders.class, value = "idempotentGraphConfig")
public void should_schedule_speculative_executions(boolean defaultIdempotence, GraphStatement<?> statement) throws Exception {
    GraphRequestHandlerTestHarness.Builder harnessBuilder = GraphRequestHandlerTestHarness.builder().withDefaultIdempotence(defaultIdempotence);
    PoolBehavior node1Behavior = harnessBuilder.customBehavior(node1);
    PoolBehavior node2Behavior = harnessBuilder.customBehavior(node2);
    PoolBehavior node3Behavior = harnessBuilder.customBehavior(node3);
    try (GraphRequestHandlerTestHarness harness = harnessBuilder.build()) {
        SpeculativeExecutionPolicy speculativeExecutionPolicy = harness.getContext().getSpeculativeExecutionPolicy(DriverExecutionProfile.DEFAULT_NAME);
        long firstExecutionDelay = 100L;
        long secondExecutionDelay = 200L;
        when(speculativeExecutionPolicy.nextExecution(any(Node.class), eq(null), eq(statement), eq(1))).thenReturn(firstExecutionDelay);
        when(speculativeExecutionPolicy.nextExecution(any(Node.class), eq(null), eq(statement), eq(2))).thenReturn(secondExecutionDelay);
        when(speculativeExecutionPolicy.nextExecution(any(Node.class), eq(null), eq(statement), eq(3))).thenReturn(-1L);
        GraphBinaryModule module = createGraphBinaryModule(harness.getContext());
        new ContinuousGraphRequestHandler(statement, harness.getSession(), harness.getContext(), "test", module, graphSupportChecker).handle();
        node1Behavior.verifyWrite();
        node1Behavior.setWriteSuccess();
        CapturedTimeout speculativeExecution1 = harness.nextScheduledTimeout();
        assertThat(speculativeExecution1.getDelay(TimeUnit.MILLISECONDS)).isEqualTo(firstExecutionDelay);
        verifyNoMoreInteractions(nodeMetricUpdater1);
        speculativeExecution1.task().run(speculativeExecution1);
        verify(nodeMetricUpdater1).incrementCounter(DefaultNodeMetric.SPECULATIVE_EXECUTIONS, DriverExecutionProfile.DEFAULT_NAME);
        node2Behavior.verifyWrite();
        node2Behavior.setWriteSuccess();
        CapturedTimeout speculativeExecution2 = harness.nextScheduledTimeout();
        assertThat(speculativeExecution2.getDelay(TimeUnit.MILLISECONDS)).isEqualTo(secondExecutionDelay);
        verifyNoMoreInteractions(nodeMetricUpdater2);
        speculativeExecution2.task().run(speculativeExecution2);
        verify(nodeMetricUpdater2).incrementCounter(DefaultNodeMetric.SPECULATIVE_EXECUTIONS, DriverExecutionProfile.DEFAULT_NAME);
        node3Behavior.verifyWrite();
        node3Behavior.setWriteSuccess();
        // No more scheduled tasks since the policy returns 0 on the third call.
        assertThat(harness.nextScheduledTimeout()).isNull();
    // Note that we don't need to complete any response, the test is just about checking that
    // executions are started.
    }
}

Example 10 with SpeculativeExecutionPolicy

use of com.datastax.oss.driver.api.core.specex.SpeculativeExecutionPolicy in project java-driver by datastax.

the class ContinuousGraphRequestHandlerSpeculativeExecutionTest method should_fail_if_no_nodes.

@Test
@UseDataProvider(location = DseTestDataProviders.class, value = "idempotentGraphConfig")
public void should_fail_if_no_nodes(boolean defaultIdempotence, GraphStatement<?> statement) {
    GraphRequestHandlerTestHarness.Builder harnessBuilder = GraphRequestHandlerTestHarness.builder().withDefaultIdempotence(defaultIdempotence);
    try (GraphRequestHandlerTestHarness harness = harnessBuilder.build()) {
        SpeculativeExecutionPolicy speculativeExecutionPolicy = harness.getContext().getSpeculativeExecutionPolicy(DriverExecutionProfile.DEFAULT_NAME);
        long firstExecutionDelay = 100L;
        when(speculativeExecutionPolicy.nextExecution(any(Node.class), eq(null), eq(statement), eq(1))).thenReturn(firstExecutionDelay);
        GraphBinaryModule module = createGraphBinaryModule(harness.getContext());
        CompletionStage<AsyncGraphResultSet> resultSetFuture = new ContinuousGraphRequestHandler(statement, harness.getSession(), harness.getContext(), "test", module, graphSupportChecker).handle();
        assertThatStage(resultSetFuture).isFailed(error -> assertThat(error).isInstanceOf(NoNodeAvailableException.class));
    }
}