content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.kafka.streams.processor.internals;
  
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.header.Headers;
  import org.apache.kafka.common.header.internals.RecordHeader;
  import org.apache.kafka.common.header.internals.RecordHeaders;
  import org.apache.kafka.common.utils.Bytes;
  import org.apache.kafka.streams.StreamsConfig;
  import org.apache.kafka.streams.StreamsConfig.InternalConfig;
  import org.apache.kafka.streams.kstream.Windowed;
  import org.apache.kafka.streams.processor.PunctuationType;
  import org.apache.kafka.streams.processor.StateStore;
  import org.apache.kafka.streams.processor.TaskId;
  import org.apache.kafka.streams.processor.To;
  import org.apache.kafka.streams.processor.api.Processor;
  import org.apache.kafka.streams.processor.api.ProcessorContext;
  import org.apache.kafka.streams.processor.api.Record;
  import org.apache.kafka.streams.processor.internals.Task.TaskType;
  import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
  import org.apache.kafka.streams.query.Position;
  import org.apache.kafka.streams.state.KeyValueIterator;
  import org.apache.kafka.streams.state.KeyValueStore;
  import org.apache.kafka.streams.state.SessionStore;
  import org.apache.kafka.streams.state.TimestampedKeyValueStore;
  import org.apache.kafka.streams.state.TimestampedWindowStore;
  import org.apache.kafka.streams.state.ValueAndTimestamp;
  import org.apache.kafka.streams.state.WindowStore;
  import org.apache.kafka.streams.state.WindowStoreIterator;
  import org.apache.kafka.streams.state.internals.PositionSerde;
  import org.apache.kafka.streams.state.internals.ThreadCache;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.time.Duration;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.function.Consumer;
  
  import static java.util.Arrays.asList;
  import static org.apache.kafka.common.utils.Utils.mkEntry;
  import static org.apache.kafka.common.utils.Utils.mkMap;
  import static org.apache.kafka.streams.processor.internals.ProcessorContextImpl.BYTEARRAY_VALUE_SERIALIZER;
  import static org.apache.kafka.streams.processor.internals.ProcessorContextImpl.BYTES_KEY_SERIALIZER;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.ArgumentMatchers.anyLong;
  import static org.mockito.ArgumentMatchers.anyString;
  import static org.mockito.Mockito.doAnswer;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.when;
  
  @SuppressWarnings("unchecked")
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.STRICT_STUBS)
  public class ProcessorContextImplTest {
      private ProcessorContextImpl context;
  
      private final StreamsConfig streamsConfig = streamsConfigMock();
  
      @Mock
      private RecordCollector recordCollector;
      @Mock
      private ProcessorStateManager stateManager;
  
      private static final String KEY = "key";
      private static final Bytes KEY_BYTES = Bytes.wrap(KEY.getBytes());
      private static final long VALUE = 42L;
      private static final byte[] VALUE_BYTES = String.valueOf(VALUE).getBytes();
      private static final long TIMESTAMP = 21L;
      private static final long STREAM_TIME = 50L;
      private static final ValueAndTimestamp<Long> VALUE_AND_TIMESTAMP = ValueAndTimestamp.make(42L, 21L);
      private static final String STORE_NAME = "underlying-store";
      private static final String REGISTERED_STORE_NAME = "registered-store";
      private static final TopicPartition CHANGELOG_PARTITION = new TopicPartition("store-changelog", 1);
  
      private boolean flushExecuted = false;
      private boolean putExecuted = false;
      private boolean putWithTimestampExecuted;
      private boolean putIfAbsentExecuted = false;
      private boolean putAllExecuted = false;
      private boolean deleteExecuted = false;
      private boolean removeExecuted = false;
  
      @Mock
      private KeyValueIterator<String, Long> rangeIter;
      @Mock
      private KeyValueIterator<String, ValueAndTimestamp<Long>> timestampedRangeIter;
      @Mock
      private KeyValueIterator<String, Long> allIter;
      @Mock
      private KeyValueIterator<String, ValueAndTimestamp<Long>> timestampedAllIter;
      @SuppressWarnings("rawtypes")
      @Mock
      private WindowStoreIterator windowStoreIter;
  
      private final List<KeyValueIterator<Windowed<String>, Long>> iters = new ArrayList<>(7);
      private final List<KeyValueIterator<Windowed<String>, ValueAndTimestamp<Long>>> timestampedIters = new ArrayList<>(7);
  
      private void foreachSetUp() {
          for (int i = 0; i < 7; i++) {
              iters.add(i, mock(KeyValueIterator.class));
              timestampedIters.add(i, mock(KeyValueIterator.class));
          }
      }
  
      private ProcessorContextImpl getStandbyContext() {
          final ProcessorStateManager stateManager = mock(ProcessorStateManager.class);
          when(stateManager.taskType()).thenReturn(TaskType.STANDBY);
          return buildProcessorContextImpl(streamsConfig, stateManager);
      }
  
      @Test
      public void globalKeyValueStoreShouldBeReadOnly() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final KeyValueStore<String, Long> keyValueStoreMock = mock(KeyValueStore.class);
          when(stateManager.globalStore("GlobalKeyValueStore")).thenAnswer(answer -> keyValueStoreMock(keyValueStoreMock));
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
          doTest("GlobalKeyValueStore", (Consumer<KeyValueStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              checkThrowsUnsupportedOperation(store::flush, "flush()");
              checkThrowsUnsupportedOperation(() -> store.put("1", 1L), "put()");
              checkThrowsUnsupportedOperation(() -> store.putIfAbsent("1", 1L), "putIfAbsent()");
              checkThrowsUnsupportedOperation(() -> store.putAll(Collections.emptyList()), "putAll()");
              checkThrowsUnsupportedOperation(() -> store.delete("1"), "delete()");
  
              assertEquals((Long) VALUE, store.get(KEY));
              assertEquals(rangeIter, store.range("one", "two"));
              assertEquals(allIter, store.all());
              assertEquals(VALUE, store.approximateNumEntries());
          });
      }
  
      @Test
      public void globalTimestampedKeyValueStoreShouldBeReadOnly() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final TimestampedKeyValueStore<String, Long> timestampedKeyValueStoreMock = mock(TimestampedKeyValueStore.class);
          when(stateManager.globalStore("GlobalTimestampedKeyValueStore")).thenAnswer(answer -> timestampedKeyValueStoreMock(timestampedKeyValueStoreMock));
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("GlobalTimestampedKeyValueStore", (Consumer<TimestampedKeyValueStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              checkThrowsUnsupportedOperation(store::flush, "flush()");
              checkThrowsUnsupportedOperation(() -> store.put("1", ValueAndTimestamp.make(1L, 2L)), "put()");
              checkThrowsUnsupportedOperation(() -> store.putIfAbsent("1", ValueAndTimestamp.make(1L, 2L)), "putIfAbsent()");
              checkThrowsUnsupportedOperation(() -> store.putAll(Collections.emptyList()), "putAll()");
              checkThrowsUnsupportedOperation(() -> store.delete("1"), "delete()");
  
              assertEquals(VALUE_AND_TIMESTAMP, store.get(KEY));
              assertEquals(timestampedRangeIter, store.range("one", "two"));
              assertEquals(timestampedAllIter, store.all());
              assertEquals(VALUE, store.approximateNumEntries());
          });
      }
  
      @Test
      public void globalWindowStoreShouldBeReadOnly() {
          foreachSetUp();
  
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final WindowStore<String, Long> windowStore = mock(WindowStore.class);
          when(stateManager.globalStore("GlobalWindowStore")).thenAnswer(answer -> windowStoreMock(windowStore));
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("GlobalWindowStore", (Consumer<WindowStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              checkThrowsUnsupportedOperation(store::flush, "flush()");
              checkThrowsUnsupportedOperation(() -> store.put("1", 1L, 1L), "put()");
  
              assertEquals(iters.get(0), store.fetchAll(0L, 0L));
              assertEquals(windowStoreIter, store.fetch(KEY, 0L, 1L));
              assertEquals(iters.get(1), store.fetch(KEY, KEY, 0L, 1L));
              assertEquals((Long) VALUE, store.fetch(KEY, 1L));
              assertEquals(iters.get(2), store.all());
          });
      }
  
      @Test
      public void globalTimestampedWindowStoreShouldBeReadOnly() {
          foreachSetUp();
  
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final TimestampedWindowStore<String, Long> windowStore = mock(TimestampedWindowStore.class);
          when(stateManager.globalStore("GlobalTimestampedWindowStore")).thenAnswer(answer -> timestampedWindowStoreMock(windowStore));
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("GlobalTimestampedWindowStore", (Consumer<TimestampedWindowStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              checkThrowsUnsupportedOperation(store::flush, "flush()");
              checkThrowsUnsupportedOperation(() -> store.put("1", ValueAndTimestamp.make(1L, 1L), 1L), "put() [with timestamp]");
  
              assertEquals(timestampedIters.get(0), store.fetchAll(0L, 0L));
              assertEquals(windowStoreIter, store.fetch(KEY, 0L, 1L));
              assertEquals(timestampedIters.get(1), store.fetch(KEY, KEY, 0L, 1L));
              assertEquals(VALUE_AND_TIMESTAMP, store.fetch(KEY, 1L));
              assertEquals(timestampedIters.get(2), store.all());
          });
      }
  
      @Test
      public void globalSessionStoreShouldBeReadOnly() {
          foreachSetUp();
  
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final SessionStore<String, Long> sessionStore = mock(SessionStore.class);
          when(stateManager.globalStore("GlobalSessionStore")).thenAnswer(answer -> sessionStoreMock(sessionStore));
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("GlobalSessionStore", (Consumer<SessionStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              checkThrowsUnsupportedOperation(store::flush, "flush()");
              checkThrowsUnsupportedOperation(() -> store.remove(null), "remove()");
              checkThrowsUnsupportedOperation(() -> store.put(null, null), "put()");
  
              assertEquals(iters.get(3), store.findSessions(KEY, 1L, 2L));
              assertEquals(iters.get(4), store.findSessions(KEY, KEY, 1L, 2L));
              assertEquals(iters.get(5), store.fetch(KEY));
              assertEquals(iters.get(6), store.fetch(KEY, KEY));
          });
      }
  
      @Test
      public void localKeyValueStoreShouldNotAllowInitOrClose() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final KeyValueStore<String, Long> keyValueStoreMock = mock(KeyValueStore.class);
          when(stateManager.store("LocalKeyValueStore")).thenAnswer(answer -> keyValueStoreMock(keyValueStoreMock));
          mockStateStoreFlush(keyValueStoreMock);
          mockKeyValueStoreOperation(keyValueStoreMock);
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("LocalKeyValueStore", (Consumer<KeyValueStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              store.flush();
              assertTrue(flushExecuted);
  
              store.put("1", 1L);
              assertTrue(putExecuted);
  
              store.putIfAbsent("1", 1L);
              assertTrue(putIfAbsentExecuted);
  
              store.putAll(Collections.emptyList());
              assertTrue(putAllExecuted);
  
              store.delete("1");
              assertTrue(deleteExecuted);
  
              assertEquals((Long) VALUE, store.get(KEY));
              assertEquals(rangeIter, store.range("one", "two"));
              assertEquals(allIter, store.all());
              assertEquals(VALUE, store.approximateNumEntries());
          });
      }
  
      @Test
      public void localTimestampedKeyValueStoreShouldNotAllowInitOrClose() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final TimestampedKeyValueStore<String, Long> timestampedKeyValueStoreMock = mock(TimestampedKeyValueStore.class);
          when(stateManager.store("LocalTimestampedKeyValueStore"))
              .thenAnswer(answer -> timestampedKeyValueStoreMock(timestampedKeyValueStoreMock));
          mockTimestampedKeyValueOperation(timestampedKeyValueStoreMock);
          mockStateStoreFlush(timestampedKeyValueStoreMock);
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("LocalTimestampedKeyValueStore", (Consumer<TimestampedKeyValueStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              store.flush();
              assertTrue(flushExecuted);
  
              store.put("1", ValueAndTimestamp.make(1L, 2L));
              assertTrue(putExecuted);
  
              store.putIfAbsent("1", ValueAndTimestamp.make(1L, 2L));
              assertTrue(putIfAbsentExecuted);
  
              store.putAll(Collections.emptyList());
              assertTrue(putAllExecuted);
  
              store.delete("1");
              assertTrue(deleteExecuted);
  
              assertEquals(VALUE_AND_TIMESTAMP, store.get(KEY));
              assertEquals(timestampedRangeIter, store.range("one", "two"));
              assertEquals(timestampedAllIter, store.all());
              assertEquals(VALUE, store.approximateNumEntries());
          });
      }
  
      @Test
      public void localWindowStoreShouldNotAllowInitOrClose() {
          foreachSetUp();
  
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final WindowStore<String, Long> windowStore = mock(WindowStore.class);
          when(stateManager.store("LocalWindowStore")).thenAnswer(answer -> windowStoreMock(windowStore));
          mockStateStoreFlush(windowStore);
  
          doAnswer(answer -> {
              putExecuted = true;
              return null;
          }).when(windowStore).put(anyString(), anyLong(), anyLong());
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("LocalWindowStore", (Consumer<WindowStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              store.flush();
              assertTrue(flushExecuted);
  
              store.put("1", 1L, 1L);
              assertTrue(putExecuted);
  
              assertEquals(iters.get(0), store.fetchAll(0L, 0L));
              assertEquals(windowStoreIter, store.fetch(KEY, 0L, 1L));
              assertEquals(iters.get(1), store.fetch(KEY, KEY, 0L, 1L));
              assertEquals((Long) VALUE, store.fetch(KEY, 1L));
              assertEquals(iters.get(2), store.all());
          });
      }
  
      @Test
      public void localTimestampedWindowStoreShouldNotAllowInitOrClose() {
          foreachSetUp();
  
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final TimestampedWindowStore<String, Long> windowStore = mock(TimestampedWindowStore.class);
          when(stateManager.store("LocalTimestampedWindowStore")).thenAnswer(answer -> timestampedWindowStoreMock(windowStore));
          mockStateStoreFlush(windowStore);
  
          doAnswer(answer -> {
              putExecuted = true;
              return null;
          }).doAnswer(answer -> {
              putWithTimestampExecuted = true;
              return null;
          }).when(windowStore).put(anyString(), any(ValueAndTimestamp.class), anyLong());
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("LocalTimestampedWindowStore", (Consumer<TimestampedWindowStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              store.flush();
              assertTrue(flushExecuted);
  
              store.put("1", ValueAndTimestamp.make(1L, 1L), 1L);
              assertTrue(putExecuted);
  
              store.put("1", ValueAndTimestamp.make(1L, 1L), 1L);
              assertTrue(putWithTimestampExecuted);
  
              assertEquals(timestampedIters.get(0), store.fetchAll(0L, 0L));
              assertEquals(windowStoreIter, store.fetch(KEY, 0L, 1L));
              assertEquals(timestampedIters.get(1), store.fetch(KEY, KEY, 0L, 1L));
              assertEquals(VALUE_AND_TIMESTAMP, store.fetch(KEY, 1L));
              assertEquals(timestampedIters.get(2), store.all());
          });
      }
  
      @Test
      public void localSessionStoreShouldNotAllowInitOrClose() {
          foreachSetUp();
  
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.globalStore(anyString())).thenReturn(null);
  
          final SessionStore<String, Long> sessionStore = mock(SessionStore.class);
          when(stateManager.store("LocalSessionStore")).thenAnswer(answer -> sessionStoreMock(sessionStore));
          mockStateStoreFlush(sessionStore);
  
          doAnswer(answer -> {
              putExecuted = true;
              return null;
          }).when(sessionStore).put(any(), any());
  
          doAnswer(answer -> {
              removeExecuted = true;
              return null;
          }).when(sessionStore).remove(any());
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          doTest("LocalSessionStore", (Consumer<SessionStore<String, Long>>) store -> {
              verifyStoreCannotBeInitializedOrClosed(store);
  
              store.flush();
              assertTrue(flushExecuted);
  
              store.remove(null);
              assertTrue(removeExecuted);
  
              store.put(null, null);
              assertTrue(putExecuted);
  
              assertEquals(iters.get(3), store.findSessions(KEY, 1L, 2L));
              assertEquals(iters.get(4), store.findSessions(KEY, KEY, 1L, 2L));
              assertEquals(iters.get(5), store.fetch(KEY));
              assertEquals(iters.get(6), store.fetch(KEY, KEY));
          });
      }
  
      @Test
      public void shouldNotSendRecordHeadersToChangelogTopic() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.registeredChangelogPartitionFor(REGISTERED_STORE_NAME)).thenReturn(CHANGELOG_PARTITION);
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          final StreamTask task1 = mock(StreamTask.class);
  
          context.transitionToActive(task1, recordCollector, null);
          context.logChange(REGISTERED_STORE_NAME, KEY_BYTES, VALUE_BYTES, TIMESTAMP, Position.emptyPosition());
  
          verify(recordCollector).send(
              CHANGELOG_PARTITION.topic(),
              KEY_BYTES,
              VALUE_BYTES,
              null,
              CHANGELOG_PARTITION.partition(),
              TIMESTAMP,
              BYTES_KEY_SERIALIZER,
              BYTEARRAY_VALUE_SERIALIZER,
              null,
              null);
      }
  
      @Test
      public void shouldSendRecordHeadersToChangelogTopicWhenConsistencyEnabled() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
          when(stateManager.registeredChangelogPartitionFor(REGISTERED_STORE_NAME)).thenReturn(CHANGELOG_PARTITION);
  
          final Position position = Position.emptyPosition();
          final Headers headers = new RecordHeaders();
          headers.add(ChangelogRecordDeserializationHelper.CHANGELOG_VERSION_HEADER_RECORD_CONSISTENCY);
          headers.add(new RecordHeader(ChangelogRecordDeserializationHelper.CHANGELOG_POSITION_HEADER_KEY,
              PositionSerde.serialize(position).array()));
  
          final StreamTask task1 = mock(StreamTask.class);
  
          context = buildProcessorContextImpl(streamsConfigWithConsistencyMock(), stateManager);
  
          context.transitionToActive(task1, recordCollector, null);
          context.logChange(REGISTERED_STORE_NAME, KEY_BYTES, VALUE_BYTES, TIMESTAMP, position);
  
          verify(recordCollector).send(
              CHANGELOG_PARTITION.topic(),
              KEY_BYTES,
              VALUE_BYTES,
              headers,
              CHANGELOG_PARTITION.partition(),
              TIMESTAMP,
              BYTES_KEY_SERIALIZER,
              BYTEARRAY_VALUE_SERIALIZER,
              null,
              null);
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnLogChange() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.logChange("Store", Bytes.wrap("k".getBytes()), null, 0L, Position.emptyPosition())
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnGetStateStore() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.getStateStore("store")
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnForward() {
          context = getStandbyContext();
          context.recordContext = mock(ProcessorRecordContext.class);
  
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.forward("key", "value")
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnForwardWithTo() {
          context = getStandbyContext();
          context.recordContext = mock(ProcessorRecordContext.class);
  
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.forward("key", "value", To.child("child-name"))
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnCommit() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.commit()
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnSchedule() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.schedule(Duration.ofMillis(100L), PunctuationType.STREAM_TIME, t -> { })
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnTopic() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.topic()
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnPartition() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.partition()
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnOffset() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.offset()
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnTimestamp() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.timestamp()
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnCurrentNode() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.currentNode()
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnSetRecordContext() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.setRecordContext(mock(ProcessorRecordContext.class))
          );
      }
  
      @Test
      public void shouldThrowUnsupportedOperationExceptionOnRecordContext() {
          context = getStandbyContext();
          assertThrows(
              UnsupportedOperationException.class,
              () -> context.recordContext()
          );
      }
  
      @Test
      public void shouldMatchStreamTime() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          when(task.streamTime()).thenReturn(STREAM_TIME);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          assertEquals(STREAM_TIME, context.currentStreamTimeMs());
      }
  
      @Test
      public void shouldAddAndGetProcessorKeyValue() {
          when(stateManager.taskType()).thenReturn(TaskType.ACTIVE);
  
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          final StreamTask task = mock(StreamTask.class);
          context.transitionToActive(task, null, null);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          context.addProcessorMetadataKeyValue("key1", 100L);
          final Long value = context.processorMetadataForKey("key1");
          assertEquals(100L, value.longValue());
  
          final Long noValue = context.processorMetadataForKey("nokey");
          assertNull(noValue);
      }
  
      @Test
      public void shouldSetAndGetProcessorMetaData() {
          context = buildProcessorContextImpl(streamsConfig, stateManager);
  
          mockProcessorNodeWithLocalKeyValueStore();
  
          final ProcessorMetadata emptyMetadata = new ProcessorMetadata();
          context.setProcessorMetadata(emptyMetadata);
          assertEquals(emptyMetadata, context.processorMetadata());
  
          final ProcessorMetadata metadata = new ProcessorMetadata(
              mkMap(
                  mkEntry("key1", 10L),
                  mkEntry("key2", 100L)
              )
          );
  
          context.setProcessorMetadata(metadata);
          assertEquals(10L, context.processorMetadataForKey("key1").longValue());
          assertEquals(100L, context.processorMetadataForKey("key2").longValue());
  
          assertThrows(NullPointerException.class, () -> context.setProcessorMetadata(null));
      }
  
      private void mockProcessorNodeWithLocalKeyValueStore() {
          context.setCurrentNode(
              new ProcessorNode<>(
                  "fake",
                  (org.apache.kafka.streams.processor.api.Processor<String, Long, Object, Object>) null,
                  new HashSet<>(
                      asList(
                          "LocalKeyValueStore",
                          "LocalTimestampedKeyValueStore",
                          "LocalWindowStore",
                          "LocalTimestampedWindowStore",
                          "LocalSessionStore"
                      )
                  )
              )
          );
      }
  
      private ProcessorContextImpl buildProcessorContextImpl(final StreamsConfig streamsConfig, final ProcessorStateManager stateManager) {
          return new ProcessorContextImpl(
              mock(TaskId.class),
              streamsConfig,
              stateManager,
              mock(StreamsMetricsImpl.class),
              mock(ThreadCache.class)
          );
      }
  
      private KeyValueStore<String, Long> keyValueStoreMock(final KeyValueStore<String, Long> keyValueStoreMock) {
          initStateStoreMock(keyValueStoreMock);
  
          when(keyValueStoreMock.get(KEY)).thenReturn(VALUE);
          when(keyValueStoreMock.approximateNumEntries()).thenReturn(VALUE);
  
          when(keyValueStoreMock.range("one", "two")).thenReturn(rangeIter);
          when(keyValueStoreMock.all()).thenReturn(allIter);
  
          return keyValueStoreMock;
      }
  
      private void mockKeyValueStoreOperation(final KeyValueStore<String, Long> keyValueStoreMock) {
          doAnswer(answer -> {
              putExecuted = true;
              return null;
          }).when(keyValueStoreMock).put(anyString(), anyLong());
  
          doAnswer(answer -> {
              putIfAbsentExecuted = true;
              return null;
          }).when(keyValueStoreMock).putIfAbsent(anyString(), anyLong());
  
          doAnswer(answer -> {
              putAllExecuted = true;
              return null;
          }).when(keyValueStoreMock).putAll(any(List.class));
  
          doAnswer(answer -> {
              deleteExecuted = true;
              return null;
          }).when(keyValueStoreMock).delete(anyString());
      }
  
      private TimestampedKeyValueStore<String, Long> timestampedKeyValueStoreMock(final TimestampedKeyValueStore<String, Long> timestampedKeyValueStoreMock) {
          initStateStoreMock(timestampedKeyValueStoreMock);
  
          when(timestampedKeyValueStoreMock.get(KEY)).thenReturn(VALUE_AND_TIMESTAMP);
          when(timestampedKeyValueStoreMock.approximateNumEntries()).thenReturn(VALUE);
  
          when(timestampedKeyValueStoreMock.range("one", "two")).thenReturn(timestampedRangeIter);
          when(timestampedKeyValueStoreMock.all()).thenReturn(timestampedAllIter);
  
          return timestampedKeyValueStoreMock;
      }
  
      private void mockTimestampedKeyValueOperation(final TimestampedKeyValueStore<String, Long> timestampedKeyValueStoreMock) {
          doAnswer(answer -> {
              putExecuted = true;
              return null;
          }).when(timestampedKeyValueStoreMock).put(anyString(), any(ValueAndTimestamp.class));
  
          doAnswer(answer -> {
              putIfAbsentExecuted = true;
              return null;
          }).when(timestampedKeyValueStoreMock).putIfAbsent(anyString(), any(ValueAndTimestamp.class));
  
          doAnswer(answer -> {
              putAllExecuted = true;
              return null;
          }).when(timestampedKeyValueStoreMock).putAll(any(List.class));
  
          doAnswer(answer -> {
              deleteExecuted = true;
              return null;
          }).when(timestampedKeyValueStoreMock).delete(anyString());
      }
  
      private WindowStore<String, Long> windowStoreMock(final WindowStore<String, Long> windowStore) {
          initStateStoreMock(windowStore);
  
          when(windowStore.fetchAll(anyLong(), anyLong())).thenReturn(iters.get(0));
          when(windowStore.fetch(anyString(), anyString(), anyLong(), anyLong())).thenReturn(iters.get(1));
          when(windowStore.fetch(anyString(), anyLong(), anyLong())).thenReturn(windowStoreIter);
          when(windowStore.fetch(anyString(), anyLong())).thenReturn(VALUE);
          when(windowStore.all()).thenReturn(iters.get(2));
  
          return windowStore;
      }
  
      private TimestampedWindowStore<String, Long> timestampedWindowStoreMock(final TimestampedWindowStore<String, Long> windowStore) {
          initStateStoreMock(windowStore);
  
          when(windowStore.fetchAll(anyLong(), anyLong())).thenReturn(timestampedIters.get(0));
          when(windowStore.fetch(anyString(), anyString(), anyLong(), anyLong())).thenReturn(timestampedIters.get(1));
          when(windowStore.fetch(anyString(), anyLong(), anyLong())).thenReturn(windowStoreIter);
          when(windowStore.fetch(anyString(), anyLong())).thenReturn(VALUE_AND_TIMESTAMP);
          when(windowStore.all()).thenReturn(timestampedIters.get(2));
  
          return windowStore;
      }
  
      private SessionStore<String, Long> sessionStoreMock(final SessionStore<String, Long> sessionStore) {
          initStateStoreMock(sessionStore);
  
          when(sessionStore.findSessions(anyString(), anyLong(), anyLong())).thenReturn(iters.get(3));
          when(sessionStore.findSessions(anyString(), anyString(), anyLong(), anyLong())).thenReturn(iters.get(4));
          when(sessionStore.fetch(anyString())).thenReturn(iters.get(5));
          when(sessionStore.fetch(anyString(), anyString())).thenReturn(iters.get(6));
  
          return sessionStore;
      }
  
      private StreamsConfig streamsConfigMock() {
          final StreamsConfig streamsConfig = mock(StreamsConfig.class);
          when(streamsConfig.originals()).thenReturn(Collections.emptyMap());
          when(streamsConfig.values()).thenReturn(Collections.emptyMap());
          when(streamsConfig.getString(StreamsConfig.APPLICATION_ID_CONFIG)).thenReturn("add-id");
          return streamsConfig;
      }
  
      private StreamsConfig streamsConfigWithConsistencyMock() {
          final StreamsConfig streamsConfig = mock(StreamsConfig.class);
  
          final Map<String, Object> myValues = new HashMap<>();
          myValues.put(InternalConfig.IQ_CONSISTENCY_OFFSET_VECTOR_ENABLED, true);
          when(streamsConfig.originals()).thenReturn(myValues);
          when(streamsConfig.values()).thenReturn(Collections.emptyMap());
          when(streamsConfig.getString(StreamsConfig.APPLICATION_ID_CONFIG)).thenReturn("add-id");
          return streamsConfig;
      }
  
      private void initStateStoreMock(final StateStore stateStore) {
          when(stateStore.name()).thenReturn(STORE_NAME);
          when(stateStore.persistent()).thenReturn(true);
          when(stateStore.isOpen()).thenReturn(true);
      }
  
      private void mockStateStoreFlush(final StateStore stateStore) {
          doAnswer(answer -> {
              flushExecuted = true;
              return null;
          }).when(stateStore).flush();
      }
  
      @SuppressWarnings("rawtypes")
      private <T extends StateStore> void doTest(final String name, final Consumer<T> checker) {
          final Processor<String, Long, String, Long> processor = new Processor<>() {
              @Override
              public void init(final ProcessorContext<String, Long> context) {
                  final T store = context.getStateStore(name);
                  checker.accept(store);
              }
  
              @Override
              public void process(final Record<String, Long> record) {
                  //No-op.
              }
  
              @Override
              public void close() {
                  //No-op.
              }
          };
  
          processor.init((ProcessorContext) context);
      }
  
      private void verifyStoreCannotBeInitializedOrClosed(final StateStore store) {
          assertEquals(STORE_NAME, store.name());
          assertTrue(store.persistent());
          assertTrue(store.isOpen());
  
          checkThrowsUnsupportedOperation(() -> store.init(null, null), "init()");
          checkThrowsUnsupportedOperation(store::close, "close()");
      }
  
      private void checkThrowsUnsupportedOperation(final Runnable check, final String name) {
          try {
              check.run();
              fail(name + " should throw exception");
          } catch (final UnsupportedOperationException e) {
              //ignore.
          }
      }
  }
  