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.state.internals;
  
  import org.apache.kafka.common.utils.Bytes;
  import org.apache.kafka.streams.kstream.Windowed;
  import org.apache.kafka.streams.processor.StateStore;
  import org.apache.kafka.streams.processor.StateStoreContext;
  import org.apache.kafka.streams.processor.internals.InternalProcessorContext;
  import org.apache.kafka.streams.state.KeyValueIterator;
  import org.apache.kafka.streams.state.SessionStore;
  
  import static org.apache.kafka.streams.processor.internals.ProcessorContextUtils.asInternalProcessorContext;
  
  /**
   * Simple wrapper around a {@link SessionStore} to support writing
   * updates to a changelog
   */
  public class ChangeLoggingSessionBytesStore
      extends WrappedStateStore<SessionStore<Bytes, byte[]>, byte[], byte[]>
      implements SessionStore<Bytes, byte[]> {
  
      private InternalProcessorContext<?, ?> internalContext;
  
      ChangeLoggingSessionBytesStore(final SessionStore<Bytes, byte[]> bytesStore) {
          super(bytesStore);
      }
  
      @Override
      public void init(final StateStoreContext stateStoreContext, final StateStore root) {
          internalContext = asInternalProcessorContext(stateStoreContext);
          super.init(stateStoreContext, root);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> findSessions(final Bytes key, final long earliestSessionEndTime, final long latestSessionStartTime) {
          return wrapped().findSessions(key, earliestSessionEndTime, latestSessionStartTime);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> backwardFindSessions(final Bytes key,
                                                                            final long earliestSessionEndTime,
                                                                            final long latestSessionStartTime) {
          return wrapped().backwardFindSessions(key, earliestSessionEndTime, latestSessionStartTime);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> findSessions(final Bytes keyFrom, final Bytes keyTo, final long earliestSessionEndTime, final long latestSessionStartTime) {
          return wrapped().findSessions(keyFrom, keyTo, earliestSessionEndTime, latestSessionStartTime);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> backwardFindSessions(final Bytes keyFrom, final Bytes keyTo,
                                                                            final long earliestSessionEndTime,
                                                                            final long latestSessionStartTime) {
          return wrapped().backwardFindSessions(keyFrom, keyTo, earliestSessionEndTime, latestSessionStartTime);
      }
  
      @Override
      public void remove(final Windowed<Bytes> sessionKey) {
          wrapped().remove(sessionKey);
          internalContext.logChange(name(), SessionKeySchema.toBinary(sessionKey), null, internalContext.recordContext().timestamp(), wrapped().getPosition());
      }
  
      @Override
      public void put(final Windowed<Bytes> sessionKey, final byte[] aggregate) {
          wrapped().put(sessionKey, aggregate);
          internalContext.logChange(name(), SessionKeySchema.toBinary(sessionKey), aggregate, internalContext.recordContext().timestamp(), wrapped().getPosition());
      }
  
      @Override
      public byte[] fetchSession(final Bytes key, final long earliestSessionEndTime, final long latestSessionStartTime) {
          return wrapped().fetchSession(key, earliestSessionEndTime, latestSessionStartTime);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> findSessions(final long earliestSessionEndTime,
                                                                    final long latestSessionEndTime) {
          return wrapped().findSessions(earliestSessionEndTime, latestSessionEndTime);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> backwardFetch(final Bytes key) {
          return wrapped().backwardFetch(key);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> fetch(final Bytes key) {
          return wrapped().fetch(key);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> backwardFetch(final Bytes keyFrom, final Bytes keyTo) {
          return wrapped().backwardFetch(keyFrom, keyTo);
      }
  
      @Override
      public KeyValueIterator<Windowed<Bytes>, byte[]> fetch(final Bytes keyFrom, final Bytes keyTo) {
          return wrapped().fetch(keyFrom, keyTo);
      }
  }