| /** |
| * 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.tez.runtime.api.events; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Public; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.tez.runtime.api.Event; |
| import org.apache.tez.runtime.api.InputInitializer; |
| |
| /** |
| * Events used by {@link InputInitializer} implementations to update the |
| * shared user payload for the Input that is being initialized. </p> |
| * |
| * This event is specific to an Input, and should only be sent once - ideally |
| * before {@link InputDataInformationEvent}s |
| */ |
| @Unstable |
| @Public |
| public class InputUpdatePayloadEvent extends Event { |
| |
| private final ByteBuffer userPayload; |
| |
| private InputUpdatePayloadEvent(ByteBuffer userPayload) { |
| Objects.requireNonNull(userPayload); |
| this.userPayload = userPayload; |
| } |
| |
| public static InputUpdatePayloadEvent create(ByteBuffer userPayload) { |
| return new InputUpdatePayloadEvent(userPayload); |
| } |
| |
| public ByteBuffer getUserPayload() { |
| return userPayload == null ? null : userPayload.asReadOnlyBuffer(); |
| } |
| } |