| /** |
| * 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.storm.streams; |
| |
| import java.io.Serializable; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.storm.generated.StreamInfo; |
| import org.apache.storm.shade.com.google.common.collect.ArrayListMultimap; |
| import org.apache.storm.shade.com.google.common.collect.Multimap; |
| import org.apache.storm.shade.com.google.common.collect.Multimaps; |
| import org.apache.storm.topology.IComponent; |
| import org.apache.storm.topology.OutputFieldsGetter; |
| import org.apache.storm.tuple.Fields; |
| |
| /** |
| * Base class for a Node which form the vertices of the topology DAG. |
| */ |
| abstract class Node implements Serializable { |
| protected final Fields outputFields; |
| private final Set<String> outputStreams; |
| // the parent streams that this node subscribes to |
| private final Multimap<Node, String> parentStreams = ArrayListMultimap.create(); |
| protected GroupingInfo groupingInfo; |
| protected String componentId; |
| protected int parallelism; |
| private boolean windowed; |
| private boolean emitsPair; |
| |
| Node(Set<String> outputStreams, Fields outputFields, String componentId, int parallelism, |
| GroupingInfo groupingInfo) { |
| this.outputStreams = new HashSet<>(outputStreams); |
| this.outputFields = outputFields; |
| this.componentId = componentId; |
| this.parallelism = parallelism; |
| this.groupingInfo = groupingInfo; |
| } |
| |
| Node(String outputStream, Fields outputFields, String componentId, int parallelism, GroupingInfo groupingInfo) { |
| this(Collections.singleton(outputStream), outputFields, componentId, parallelism, groupingInfo); |
| } |
| |
| Node(String outputStream, Fields outputFields, String componentId, GroupingInfo groupingInfo) { |
| this(outputStream, outputFields, componentId, 1, groupingInfo); |
| } |
| |
| Node(String outputStream, Fields outputFields) { |
| this(outputStream, outputFields, null); |
| } |
| |
| Node(String outputStream, Fields outputFields, GroupingInfo groupingInfo) { |
| this(outputStream, outputFields, null, groupingInfo); |
| } |
| |
| static Fields getOutputFields(IComponent component, String streamId) { |
| OutputFieldsGetter getter = new OutputFieldsGetter(); |
| component.declareOutputFields(getter); |
| Map<String, StreamInfo> fieldsDeclaration = getter.getFieldsDeclaration(); |
| if ((fieldsDeclaration != null) && fieldsDeclaration.containsKey(streamId)) { |
| return new Fields(fieldsDeclaration.get(streamId).get_output_fields()); |
| } |
| return new Fields(); |
| } |
| |
| public Fields getOutputFields() { |
| return outputFields; |
| } |
| |
| GroupingInfo getGroupingInfo() { |
| return groupingInfo; |
| } |
| |
| void setGroupingInfo(GroupingInfo groupingInfo) { |
| this.groupingInfo = groupingInfo; |
| } |
| |
| String getComponentId() { |
| return componentId; |
| } |
| |
| void setComponentId(String componentId) { |
| this.componentId = componentId; |
| } |
| |
| int getParallelism() { |
| return parallelism; |
| } |
| |
| void setParallelism(int parallelism) { |
| this.parallelism = parallelism; |
| } |
| |
| void addParentStream(Node parent, String streamId) { |
| parentStreams.put(parent, streamId); |
| } |
| |
| void removeParentStreams(Node parent) { |
| parentStreams.removeAll(parent); |
| } |
| |
| Set<String> getOutputStreams() { |
| return Collections.unmodifiableSet(outputStreams); |
| } |
| |
| public boolean isWindowed() { |
| return windowed; |
| } |
| |
| public void setWindowed(boolean windowed) { |
| this.windowed = windowed; |
| } |
| |
| Collection<String> getParentStreams(Node parent) { |
| return parentStreams.get(parent); |
| } |
| |
| Set<Node> getParents(String stream) { |
| Multimap<String, Node> rev = Multimaps.invertFrom(parentStreams, ArrayListMultimap.<String, Node>create()); |
| return new HashSet<>(rev.get(stream)); |
| } |
| |
| Set<Node> getParents() { |
| return parentStreams.keySet(); |
| } |
| |
| void addOutputStream(String streamId) { |
| outputStreams.add(streamId); |
| } |
| |
| public boolean emitsPair() { |
| return emitsPair; |
| } |
| |
| public void setEmitsPair(boolean emitsPair) { |
| this.emitsPair = emitsPair; |
| } |
| |
| @Override |
| public String toString() { |
| return "Node{" |
| + "outputStreams=" + outputStreams |
| + ", outputFields=" + outputFields |
| + ", groupingInfo=" + groupingInfo |
| + ", componentId='" + componentId + '\'' |
| + ", parallelism=" + parallelism |
| + ", parentStreams=" + parentStreams |
| + ", windowed=" + windowed |
| + ", emitsPair=" + emitsPair |
| + '}'; |
| } |
| } |