| /* |
| * 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.samza.operators.spec; |
| |
| import org.apache.samza.system.descriptors.InputTransformer; |
| import org.apache.samza.operators.functions.ScheduledFunction; |
| import org.apache.samza.operators.functions.WatermarkFunction; |
| import org.apache.samza.serializers.Serde; |
| import org.apache.samza.system.IncomingMessageEnvelope; |
| |
| /** |
| * The spec for an operator that receives incoming messages from an input stream |
| * and converts them to the input message. The input message type is: |
| * <ul> |
| * <li>{@code T} if the input stream has an {@link InputTransformer} with result type T |
| * <li>{@code KV<K, V>} if the input stream is keyed |
| * <li>{@code V} if the input stream is unkeyed |
| * </ul> |
| */ |
| public class InputOperatorSpec extends OperatorSpec<IncomingMessageEnvelope, Object> { |
| |
| private final String streamId; |
| private final boolean isKeyed; |
| private final InputTransformer transformer; // may be null |
| |
| /** |
| * The following {@link Serde}s are serialized by the ExecutionPlanner when generating the configs for a stream, and |
| * deserialized once during startup in SamzaContainer. They don't need to be deserialized here on a per-task basis |
| * |
| * Serdes are optional for intermediate streams and may be specified for job.default.system in configuration instead. |
| */ |
| private transient final Serde keySerde; |
| private transient final Serde valueSerde; |
| |
| public InputOperatorSpec(String streamId, Serde keySerde, Serde valueSerde, |
| InputTransformer transformer, boolean isKeyed, String opId) { |
| super(OpCode.INPUT, opId); |
| this.streamId = streamId; |
| this.isKeyed = isKeyed; |
| this.transformer = transformer; |
| this.keySerde = keySerde; |
| this.valueSerde = valueSerde; |
| } |
| |
| public String getStreamId() { |
| return this.streamId; |
| } |
| |
| /** |
| * Get the key serde for this input stream if any. |
| * |
| * @return the key serde if any, else null |
| */ |
| public Serde getKeySerde() { |
| return keySerde; |
| } |
| |
| /** |
| * Get the value serde for this input stream if any. |
| * |
| * @return the value serde if any, else null |
| */ |
| public Serde getValueSerde() { |
| return valueSerde; |
| } |
| |
| public boolean isKeyed() { |
| return isKeyed; |
| } |
| |
| /** |
| * Get the {@link InputTransformer} for this input stream if any. |
| * |
| * @return the {@link InputTransformer} if any, else null |
| */ |
| public InputTransformer getTransformer() { |
| return transformer; |
| } |
| |
| @Override |
| public WatermarkFunction getWatermarkFn() { |
| return null; |
| } |
| |
| @Override |
| public ScheduledFunction getScheduledFn() { |
| return null; |
| } |
| } |