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.utils.Bytes;
  import org.apache.kafka.common.utils.Time;
  import org.apache.kafka.streams.StreamsConfig;
  import org.apache.kafka.streams.processor.Cancellable;
  import org.apache.kafka.streams.processor.PunctuationType;
  import org.apache.kafka.streams.processor.Punctuator;
  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.FixedKeyRecord;
  import org.apache.kafka.streams.processor.api.Record;
  import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
  import org.apache.kafka.streams.query.Position;
  import org.apache.kafka.streams.state.internals.ThreadCache;
  import org.apache.kafka.streams.state.internals.ThreadCache.DirtyEntryFlushListener;
  
  import java.time.Duration;
  
  import static org.apache.kafka.streams.processor.internals.AbstractReadWriteDecorator.wrapWithReadWriteStore;
  
  public class GlobalProcessorContextImpl extends AbstractProcessorContext<Object, Object> {
  
      private final GlobalStateManager stateManager;
      private final Time time;
  
      public GlobalProcessorContextImpl(final StreamsConfig config,
                                        final GlobalStateManager stateMgr,
                                        final StreamsMetricsImpl metrics,
                                        final ThreadCache cache,
                                        final Time time) {
          super(new TaskId(-1, -1), config, metrics, cache);
          stateManager = stateMgr;
          this.time = time;
      }
  
      @Override
      protected StateManager stateManager() {
          return stateManager;
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <S extends StateStore> S getStateStore(final String name) {
          final StateStore store = stateManager.globalStore(name);
          return (S) wrapWithReadWriteStore(store);
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <K, V> void forward(final Record<K, V> record) {
          final ProcessorNode<?, ?, ?, ?> previousNode = currentNode();
          try {
              for (final ProcessorNode<?, ?, ?, ?> child : currentNode().children()) {
                  setCurrentNode(child);
                  ((ProcessorNode<K, V, ?, ?>) child).process(record);
              }
          } finally {
              setCurrentNode(previousNode);
          }
      }
  
      @Override
      public <K, V> void forward(final Record<K, V> record, final String childName) {
          throw new UnsupportedOperationException("this should not happen: forward() not supported in global processor context.");
      }
  
      @Override
      public <KIn, VIn> void forward(final KIn key, final VIn value) {
          forward(new Record<>(key, value, recordContext().timestamp(), headers()));
      }
  
      /**
       * No-op. This should only be called on GlobalStateStore#flush and there should be no child nodes
       */
      @Override
      public <K, V> void forward(final K key, final V value, final To to) {
          if (!currentNode().children().isEmpty()) {
              throw new IllegalStateException("This method should only be called on 'GlobalStateStore.flush' that should not have any children.");
          }
      }
  
      @Override
      public <K, V> void forward(final FixedKeyRecord<K, V> record) {
          forward(new Record<>(record.key(), record.value(), record.timestamp(), record.headers()));
      }
  
      @Override
      public <K, V> void forward(final FixedKeyRecord<K, V> record, final String childName) {
          forward(
              new Record<>(record.key(), record.value(), record.timestamp(), record.headers()),
              childName
          );
      }
  
      @Override
      public void commit() {
          //no-op
      }
  
      @Override
      public long currentSystemTimeMs() {
          return time.milliseconds();
      }
  
      @Override
      public long currentStreamTimeMs() {
          throw new UnsupportedOperationException("There is no concept of stream-time for a global processor.");
      }
  
      /**
       * @throws UnsupportedOperationException on every invocation
       */
      @Override
      public Cancellable schedule(final Duration interval, final PunctuationType type, final Punctuator callback) {
          throw new UnsupportedOperationException("this should not happen: schedule() not supported in global processor context.");
      }
  
      @Override
      public void logChange(final String storeName,
                            final Bytes key,
                            final byte[] value,
                            final long timestamp,
                            final Position position) {
          throw new UnsupportedOperationException("this should not happen: logChange() not supported in global processor context.");
      }
  
      @Override
      public void transitionToActive(final StreamTask streamTask, final RecordCollector recordCollector, final ThreadCache newCache) {
          throw new UnsupportedOperationException("this should not happen: transitionToActive() not supported in global processor context.");
      }
  
      @Override
      public void transitionToStandby(final ThreadCache newCache) {
          throw new UnsupportedOperationException("this should not happen: transitionToStandby() not supported in global processor context.");
      }
  
      @Override
      public void registerCacheFlushListener(final String namespace, final DirtyEntryFlushListener listener) {
          cache.addDirtyEntryFlushListener(namespace, listener);
      }
  }
  