| /* |
| * 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.sql; |
| |
| import net.jodah.failsafe.internal.util.Assert; |
| import org.apache.samza.operators.KV; |
| import org.apache.samza.sql.data.SamzaSqlRelMsgMetadata; |
| import org.apache.samza.system.IncomingMessageEnvelope; |
| import org.apache.samza.system.descriptors.InputTransformer; |
| |
| |
| /** |
| * SamzaSqlInputTransformer: |
| * Input Transformer for SamzaSQL that consumes {@link IncomingMessageEnvelope} (IME) and produces |
| * {@link SamzaSqlInputMessage} so that the event metadata (currently eventTime and arrivalTime) are copied |
| * from the IME to the SamzaSQL layer through the {@link SamzaSqlInputMessage} |
| */ |
| |
| public class SamzaSqlInputTransformer implements InputTransformer { |
| |
| @Override |
| public Object apply(IncomingMessageEnvelope ime) { |
| Assert.notNull(ime, "ime is null"); |
| KV<Object, Object> keyAndMessageKV = KV.of(ime.getKey(), ime.getMessage()); |
| SamzaSqlRelMsgMetadata metadata = new SamzaSqlRelMsgMetadata(ime.getEventTime(), ime.getArrivalTime()); |
| SamzaSqlInputMessage samzaMsg = SamzaSqlInputMessage.of(keyAndMessageKV, metadata); |
| return samzaMsg; |
| } |
| } |