WriteResponse.java

/*
 * 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 gobblin.writer;

/**
 * A class for encapsulating the system-native response and general statistics from a write
 */
public interface WriteResponse<T> {

  /**
   * Get the raw response returned by the underlying write system
   */
  T getRawResponse();

  /**
   * Get a String representation of the response.
   */
  String getStringResponse();

  /**
   * The number of bytes written as part of this write.
   * @return The number of bytes written as part of this write.
   * -1 if this value is unknown. 0 if nothing was written.
   */
  long bytesWritten();

  WriteResponse EMPTY = new WriteResponse() {
    private final String _emptyResponse = "EmptyResponse";

    @Override
    public Object getRawResponse() {
      return this._emptyResponse;
    }

    @Override
    public String getStringResponse() {
      return this._emptyResponse;
    }

    @Override
    public long bytesWritten() {
      return -1;
    }
  };
}