/*
    * 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.omid.committable;
  
  import org.apache.phoenix.thirdparty.com.google.common.base.Optional;
  import org.apache.phoenix.thirdparty.com.google.common.util.concurrent.ListenableFuture;
  import org.apache.phoenix.thirdparty.com.google.common.util.concurrent.SettableFuture;
  
  import java.io.IOException;
  
  public class NullCommitTable implements CommitTable {
      @Override
      public CommitTable.Writer getWriter() {
          return new Writer();
      }
  
      @Override
      public CommitTable.Client getClient() {
          return new Client();
      }
  
      public static class Writer implements CommitTable.Writer {
          @Override
          public void addCommittedTransaction(long startTimestamp, long commitTimestamp) {
              // noop
          }
  
          @Override
          public void updateLowWatermark(long lowWatermark) throws IOException {
              // noop
          }
  
          @Override
          public void clearWriteBuffer() {
              // noop
          }
  
          @Override
          public boolean atomicAddCommittedTransaction(long startTimestamp, long commitTimestamp) throws IOException {
              return true;
          }
  
          @Override
          public void flush() throws IOException {
              // noop
          }
      }
  
      public static class Client implements CommitTable.Client {
          @Override
          public ListenableFuture<Optional<CommitTimestamp>> getCommitTimestamp(long startTimestamp) {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public ListenableFuture<Long> readLowWatermark() {
              throw new UnsupportedOperationException();
          }
  
          @Override
          public ListenableFuture<Void> deleteCommitEntry(long startTimestamp) {
              SettableFuture<Void> f = SettableFuture.create();
              f.set(null);
              return f;
          }
  
          @Override
          public ListenableFuture<Boolean> tryInvalidateTransaction(long startTimestamp) {
              throw new UnsupportedOperationException();
          }
  
      }
  }