| /* |
| * 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.nemo.runtime.executor.datatransfer; |
| |
| import org.apache.nemo.common.ir.OutputCollector; |
| import org.apache.nemo.common.ir.vertex.OperatorVertex; |
| import org.apache.nemo.common.punctuation.Watermark; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class is used for collecting watermarks for an OperatorVertex. |
| * InputWatermarkManager emits watermarks to this class. |
| */ |
| public final class OperatorWatermarkCollector implements OutputCollector { |
| private static final Logger LOG = LoggerFactory.getLogger(OperatorWatermarkCollector.class.getName()); |
| |
| private final OperatorVertex operatorVertex; |
| |
| public OperatorWatermarkCollector(final OperatorVertex operatorVertex) { |
| this.operatorVertex = operatorVertex; |
| } |
| |
| @Override |
| public void emit(final Object output) { |
| throw new IllegalStateException("Should not be called"); |
| } |
| |
| @Override |
| public void emitWatermark(final Watermark watermark) { |
| operatorVertex.getTransform().onWatermark(watermark); |
| } |
| |
| @Override |
| public void emit(final String dstVertexId, final Object output) { |
| throw new IllegalStateException("Should not be called"); |
| } |
| } |