Defensive Renew Lease

sdk/cosmos/azure-cosmos-tests/src/test/java/com/azure/cosmos/implementation/changefeed/epkversion/PartitionProcessorImplTests.java

@@ -29,8 +29,12 @@
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
 
+import java.time.Duration;
+import java.time.Instant;
 import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
 
@@ -54,7 +58,7 @@ public void shouldCheckpointFor304WhenContinuationTokenChanges(
         boolean shouldDoCheckpoint) {
         ChangeFeedObserver<ChangeFeedProcessorItem> observerMock = Mockito.mock(ChangeFeedObserver.class);
         ChangeFeedContextClient changeFeedContextClientMock = Mockito.mock(ChangeFeedContextClient.class);
-        
+
         // Setup initial state with continuation token
         ChangeFeedStateV1 initialChangeFeedState = this.getChangeFeedStateWithContinuationTokens(1);
 
@@ -117,6 +121,62 @@ public void shouldCheckpointFor304WhenContinuationTokenChanges(
         }
     }
 
+    @Test(groups = "unit")
+    public void processedTimeSetAfterProcessing() {
+        // Arrange
+        ChangeFeedObserver<ChangeFeedProcessorItem> observerMock = Mockito.mock(ChangeFeedObserver.class);
+        Mockito.when(observerMock.processChanges(Mockito.any(), Mockito.anyList())).thenReturn(Mono.empty());
+
+        ChangeFeedContextClient changeFeedContextClientMock = Mockito.mock(ChangeFeedContextClient.class);
+        CosmosAsyncContainer containerMock = Mockito.mock(CosmosAsyncContainer.class);
+
+        ChangeFeedStateV1 startState = getChangeFeedStateWithContinuationTokens(1);
+        ProcessorSettings settings = new ProcessorSettings(startState, containerMock);
+        settings.withMaxItemCount(10);
+
+        Lease leaseMock = Mockito.mock(ServiceItemLeaseV1.class);
+        Mockito.when(leaseMock.getContinuationToken()).thenReturn(startState.toString());
+
+        PartitionCheckpointer checkpointerMock = Mockito.mock(PartitionCheckpointerImpl.class);
+
+        // Create a feed response with one mocked result
+        @SuppressWarnings("unchecked") FeedResponse<ChangeFeedProcessorItem> feedResponseMock = Mockito.mock(FeedResponse.class);
+        List<ChangeFeedProcessorItem> results = new ArrayList<>();
+        results.add(Mockito.mock(ChangeFeedProcessorItem.class));
+        AtomicInteger counter = new AtomicInteger(0);
+        Mockito.when(feedResponseMock.getResults()).thenAnswer(invocation -> {
+            Thread.sleep(500);
+            return counter.getAndIncrement() < 10 ? results : new ArrayList<>();
+        });
+        ChangeFeedState changeFeedState = this.getChangeFeedStateWithContinuationTokens(1);
+        Mockito.when(feedResponseMock.getContinuationToken()).thenReturn(changeFeedState.toString());
+
+        // The processor will continuously fetch, but we will cancel shortly after first batch
+        Mockito.doReturn(Flux.just(feedResponseMock))
+            .when(changeFeedContextClientMock)
+            .createDocumentChangeFeedQuery(Mockito.any(), Mockito.any(), Mockito.any());
+
+        PartitionProcessorImpl<ChangeFeedProcessorItem> processor = new PartitionProcessorImpl<>(
+            observerMock,
+            changeFeedContextClientMock,
+            settings,
+            checkpointerMock,
+            leaseMock,
+            ChangeFeedProcessorItem.class,
+            ChangeFeedMode.INCREMENTAL,
+            null);
+        Instant initialTime = processor.getLastProcessedTime();
+
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Mono<Void> runMono = processor.run(cts.getToken());
+
+        StepVerifier.create(runMono)
+            .thenAwait(Duration.ofMillis(800))
+            .then(cts::cancel)
+            .verifyComplete();
+
+        assertThat(processor.getLastProcessedTime()).isAfter(initialTime);
+    }
 
     @Test(groups = "unit")
     public void partitionSplitHappenOnFirstRequest() {
@@ -184,7 +244,7 @@ private ChangeFeedStateV1 getChangeFeedStateWithContinuationTokens(int tokenCoun
 
         continuationBuilder.append("],")
             .append("\"PKRangeId\":\"").append(pkRangeId).append("\"}");
-        
+
         String continuationJson = continuationBuilder.toString();
 
         FeedRangePartitionKeyRangeImpl feedRange = new FeedRangePartitionKeyRangeImpl(pkRangeId);

sdk/cosmos/azure-cosmos-tests/src/test/java/com/azure/cosmos/implementation/changefeed/epkversion/PartitionSupervisorImplTests.java

@@ -0,0 +1,145 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+package com.azure.cosmos.implementation.changefeed.epkversion;
+
+import com.azure.cosmos.implementation.changefeed.CancellationToken;
+import com.azure.cosmos.implementation.changefeed.CancellationTokenSource;
+import com.azure.cosmos.implementation.changefeed.ChangeFeedObserver;
+import com.azure.cosmos.implementation.changefeed.Lease;
+import com.azure.cosmos.implementation.changefeed.LeaseRenewer;
+import com.fasterxml.jackson.databind.JsonNode;
+import org.mockito.Mockito;
+import org.testng.annotations.Test;
+import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
+
+import java.lang.reflect.Method;
+import java.time.Duration;
+import java.time.Instant;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for the PartitionSupervisorImpl class
+ */
+public class PartitionSupervisorImplTests {
+
+    private Lease leaseMock;
+    private PartitionProcessor processorMock;
+    private LeaseRenewer renewerMock;
+    private ChangeFeedObserver<JsonNode> observerMock; // added field
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    public void setup() {
+        leaseMock = Mockito.mock(Lease.class);
+        Mockito.when(leaseMock.getLeaseToken()).thenReturn("-FF");
+        observerMock = Mockito.mock(ChangeFeedObserver.class); // assign to field
+        processorMock = Mockito.mock(PartitionProcessor.class);
+        renewerMock = Mockito.mock(LeaseRenewer.class);
+
+        Mockito.doNothing().when(observerMock).open(Mockito.any());
+        Mockito.when(processorMock.run(Mockito.any())).thenReturn(Mono.empty());
+        Mockito.when(renewerMock.run(Mockito.any())).thenReturn(Mono.empty());
+        Mockito.when(renewerMock.getLeaseRenewInterval()).thenReturn(Duration.ofSeconds(1));
+    }
+
+    private PartitionSupervisorImpl createSupervisor() {
+        return new PartitionSupervisorImpl(
+            leaseMock,
+            observerMock,
+            processorMock,
+            renewerMock,
+            Schedulers.immediate());
+    }
+
+    private boolean invokeShouldContinue(PartitionSupervisorImpl sup, CancellationToken token) throws Exception {
+        Method m = PartitionSupervisorImpl.class.getDeclaredMethod("shouldContinue", CancellationToken.class);
+        m.setAccessible(true);
+        return (boolean) m.invoke(sup, token);
+    }
+
+    @Test(groups = "unit")
+    public void shouldContinue_NoVerificationWindow_NotCancelled_NoErrors() throws Exception {
+        this.setup();
+        PartitionSupervisorImpl sup = createSupervisor();
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Mockito.when(processorMock.getResultException()).thenReturn(null);
+        Mockito.when(renewerMock.getResultException()).thenReturn(null);
+        Mockito.when(processorMock.getLastProcessedTime()).thenReturn(Instant.now());
+
+        boolean result = invokeShouldContinue(sup, cts.getToken());
+        assertThat(result).isTrue();
+    }
+
+    @Test(groups = "unit")
+    public void shouldContinue_VerificationWindow_ProcessedBatchesTrue() throws Exception {
+        this.setup();
+        PartitionSupervisorImpl sup = createSupervisor();
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Duration renewInterval = renewerMock.getLeaseRenewInterval();
+        // Force verification window elapsed: interval * 25 + 1s
+        Mockito.when(processorMock.getLastProcessedTime()).thenReturn(Instant.now().minus(renewInterval
+            .multipliedBy(23)).minusSeconds(1));
+        Mockito.when(processorMock.getResultException()).thenReturn(null);
+        Mockito.when(renewerMock.getResultException()).thenReturn(null);
+
+
+        boolean result = invokeShouldContinue(sup, cts.getToken());
+
+        assertThat(result).isTrue();
+    }
+
+    @Test(groups = "unit")
+    public void shouldContinue_VerificationWindow_ProcessedBatchesFalse() throws Exception {
+        this.setup();
+        PartitionSupervisorImpl sup = createSupervisor();
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Duration renewInterval = renewerMock.getLeaseRenewInterval();
+        Mockito.when(processorMock.getLastProcessedTime()).thenReturn(Instant.now().minus(renewInterval.multipliedBy(25)).minusSeconds(1));
+        Mockito.when(processorMock.getResultException()).thenReturn(null);
+        Mockito.when(renewerMock.getResultException()).thenReturn(null);
+
+        boolean result = invokeShouldContinue(sup, cts.getToken());
+        assertThat(result).isFalse(); // should stop due to no processed batches
+    }
+
+    @Test(groups = "unit")
+    public void shouldContinue_ProcessorError_Stops() throws Exception {
+        this.setup();
+        PartitionSupervisorImpl sup = createSupervisor();
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Mockito.when(processorMock.getLastProcessedTime()).thenReturn(Instant.now());
+        Mockito.when(processorMock.getResultException()).thenReturn(new RuntimeException("failure"));
+        Mockito.when(renewerMock.getResultException()).thenReturn(null);
+
+        boolean result = invokeShouldContinue(sup, cts.getToken());
+        assertThat(result).isFalse();
+    }
+
+    @Test(groups = "unit")
+    public void shouldContinue_RenewerError_Stops() throws Exception {
+        this.setup();
+        PartitionSupervisorImpl sup = createSupervisor();
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Mockito.when(processorMock.getLastProcessedTime()).thenReturn(Instant.now());
+        Mockito.when(processorMock.getResultException()).thenReturn(null);
+        Mockito.when(renewerMock.getResultException()).thenReturn(new RuntimeException("lease error"));
+
+        boolean result = invokeShouldContinue(sup, cts.getToken());
+        assertThat(result).isFalse();
+    }
+
+    @Test(groups = "unit")
+    public void shouldContinue_ShutdownRequested_Stops() throws Exception {
+        this.setup();
+        PartitionSupervisorImpl sup = createSupervisor();
+        CancellationTokenSource cts = new CancellationTokenSource();
+        cts.cancel();
+        Mockito.when(processorMock.getLastProcessedTime()).thenReturn(Instant.now());
+        Mockito.when(processorMock.getResultException()).thenReturn(null);
+        Mockito.when(renewerMock.getResultException()).thenReturn(null);
+
+        boolean result = invokeShouldContinue(sup, cts.getToken());
+        assertThat(result).isFalse();
+    }
+}

sdk/cosmos/azure-cosmos-tests/src/test/java/com/azure/cosmos/implementation/changefeed/pkversion/PartitionProcessorImplTests.java

@@ -16,10 +16,12 @@
 import com.azure.cosmos.implementation.changefeed.common.ChangeFeedStartFromInternal;
 import com.azure.cosmos.implementation.changefeed.common.ChangeFeedState;
 import com.azure.cosmos.implementation.changefeed.common.ChangeFeedStateV1;
+import com.azure.cosmos.implementation.changefeed.epkversion.ServiceItemLeaseV1;
 import com.azure.cosmos.implementation.changefeed.exceptions.FeedRangeGoneException;
 import com.azure.cosmos.implementation.directconnectivity.ReflectionUtils;
 import com.azure.cosmos.implementation.feedranges.FeedRangeContinuation;
 import com.azure.cosmos.implementation.feedranges.FeedRangePartitionKeyRangeImpl;
+import com.azure.cosmos.models.ChangeFeedProcessorItem;
 import com.azure.cosmos.models.FeedResponse;
 import com.fasterxml.jackson.databind.JsonNode;
 import org.mockito.Mockito;
@@ -29,8 +31,12 @@
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
 
+import java.time.Duration;
+import java.time.Instant;
 import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
 
@@ -117,6 +123,60 @@ public void shouldCheckpointFor304WhenContinuationTokenChanges(
         }
     }
 
+    @Test(groups = "unit")
+    public void processedTimeSetAfterProcessing() {
+        ChangeFeedObserver<JsonNode> observerMock = Mockito.mock(ChangeFeedObserver.class);
+        Mockito.when(observerMock.processChanges(Mockito.any(), Mockito.anyList())).thenReturn(Mono.empty());
+
+        ChangeFeedContextClient changeFeedContextClientMock = Mockito.mock(ChangeFeedContextClient.class);
+        CosmosAsyncContainer containerMock = Mockito.mock(CosmosAsyncContainer.class);
+
+        ChangeFeedStateV1 startState = getChangeFeedStateWithContinuationTokens(1);
+        ProcessorSettings settings = new ProcessorSettings(startState, containerMock);
+        settings.withMaxItemCount(10);
+
+        Lease leaseMock = Mockito.mock(ServiceItemLeaseV1.class);
+        Mockito.when(leaseMock.getContinuationToken()).thenReturn(startState.toString());
+
+        PartitionCheckpointer checkpointerMock = Mockito.mock(PartitionCheckpointerImpl.class);
+
+        // Create a feed response with one mocked result
+        @SuppressWarnings("unchecked") FeedResponse<ChangeFeedProcessorItem> feedResponseMock = Mockito.mock(FeedResponse.class);
+        List<ChangeFeedProcessorItem> results = new ArrayList<>();
+        results.add(Mockito.mock(ChangeFeedProcessorItem.class));
+        AtomicInteger counter = new AtomicInteger(0);
+        Mockito.when(feedResponseMock.getResults()).thenAnswer(invocation -> {
+            Thread.sleep(500);
+            return counter.getAndIncrement() < 10 ? results : new ArrayList<>();
+        });
+        ChangeFeedState changeFeedState = this.getChangeFeedStateWithContinuationTokens(1);
+        Mockito.when(feedResponseMock.getContinuationToken()).thenReturn(changeFeedState.toString());
+
+        // The processor will continuously fetch, but we will cancel shortly after first batch
+        Mockito.doReturn(Flux.just(feedResponseMock))
+            .when(changeFeedContextClientMock)
+            .createDocumentChangeFeedQuery(Mockito.any(), Mockito.any(), Mockito.any());
+
+        PartitionProcessorImpl processor = new PartitionProcessorImpl(
+            observerMock,
+            changeFeedContextClientMock,
+            settings,
+            checkpointerMock,
+            leaseMock,
+            null);
+        Instant initialTime = processor.getLastProcessedTime();
+
+        CancellationTokenSource cts = new CancellationTokenSource();
+        Mono<Void> runMono = processor.run(cts.getToken());
+
+        StepVerifier.create(runMono)
+            .thenAwait(Duration.ofMillis(800))
+            .then(cts::cancel)
+            .verifyComplete();
+
+        assertThat(processor.getLastProcessedTime()).isAfter(initialTime);
+    }
+
     @Test
     public void partitionSplitHappenOnFirstRequest() {
         @SuppressWarnings("unchecked") ChangeFeedObserver<JsonNode> observerMock =