lang/java/ipc/src/main/java/org/apache/avro/ipc/Callback.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 org.apache.avro.ipc;

/**
 * Interface for receiving asynchronous callbacks.
 * For each request with an asynchronous callback,
 * either {@link #handleResult(Object)} or {@link #handleError(Throwable)}
 * will be invoked.
 */
public interface Callback<T> {
  /**
   * Receives a callback result.
   * @param result the result returned in the callback.
   */
  void handleResult(T result);

  /**
   * Receives an error.
   * @param error the error returned in the callback.
   */
  void handleError(Throwable error);
}