| /** |
| * 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.heron.eco.builder.heron; |
| |
| import java.io.Serializable; |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.heron.api.bolt.IBasicBolt; |
| import org.apache.heron.api.bolt.IRichBolt; |
| import org.apache.heron.api.bolt.IStatefulWindowedBolt; |
| import org.apache.heron.api.bolt.IWindowedBolt; |
| import org.apache.heron.api.grouping.CustomStreamGrouping; |
| import org.apache.heron.api.topology.BoltDeclarer; |
| import org.apache.heron.api.topology.TopologyBuilder; |
| import org.apache.heron.api.tuple.Fields; |
| import org.apache.heron.api.utils.Utils; |
| import org.apache.heron.eco.builder.ObjectBuilder; |
| import org.apache.heron.eco.definition.ComponentStream; |
| import org.apache.heron.eco.definition.EcoExecutionContext; |
| import org.apache.heron.eco.definition.EcoTopologyDefinition; |
| import org.apache.heron.eco.definition.GroupingDefinition; |
| import org.apache.heron.eco.definition.ObjectDefinition; |
| import org.apache.heron.eco.definition.StreamDefinition; |
| |
| public class StreamBuilder { |
| |
| protected <K extends Serializable, V extends Serializable> void buildStreams( |
| EcoExecutionContext executionContext, TopologyBuilder builder, ObjectBuilder objectBuilder) |
| throws IllegalAccessException, InstantiationException, ClassNotFoundException, |
| NoSuchFieldException, InvocationTargetException { |
| EcoTopologyDefinition topologyDefinition = executionContext.getTopologyDefinition(); |
| Map<String, ComponentStream> componentStreams = new HashMap<>(); |
| |
| HashMap<String, BoltDeclarer> declarers = new HashMap<>(); |
| for (StreamDefinition stream : topologyDefinition.getStreams()) { |
| Object boltObj = executionContext.getBolt(stream.getTo()); |
| BoltDeclarer declarer = declarers.get(stream.getTo()); |
| if (boltObj instanceof IRichBolt) { |
| if (declarer == null) { |
| declarer = builder.setBolt(stream.getTo(), |
| (IRichBolt) boltObj, |
| topologyDefinition.parallelismForBolt(stream.getTo())); |
| declarers.put(stream.getTo(), declarer); |
| } |
| } else if (boltObj instanceof IBasicBolt) { |
| if (declarer == null) { |
| declarer = builder.setBolt( |
| stream.getTo(), |
| (IBasicBolt) boltObj, |
| topologyDefinition.parallelismForBolt(stream.getTo())); |
| declarers.put(stream.getTo(), declarer); |
| } |
| } else if (boltObj instanceof IStatefulWindowedBolt) { |
| if (declarer == null) { |
| //noinspection unchecked |
| declarer = builder.setBolt( |
| stream.getTo(), |
| (IStatefulWindowedBolt<K, V>) boltObj, |
| topologyDefinition.parallelismForBolt(stream.getTo())); |
| declarers.put(stream.getTo(), declarer); |
| } |
| } else if (boltObj instanceof IWindowedBolt) { |
| if (declarer == null) { |
| declarer = builder.setBolt( |
| stream.getTo(), |
| (IWindowedBolt) boltObj, |
| topologyDefinition.parallelismForBolt(stream.getTo())); |
| declarers.put(stream.getTo(), declarer); |
| } |
| } else { |
| throw new IllegalArgumentException("Class does not appear to be a bolt: " |
| + boltObj.getClass().getName()); |
| } |
| |
| GroupingDefinition grouping = stream.getGrouping(); |
| // if the streamId is defined, use it for the grouping, |
| // otherwise assume default stream |
| String streamId = grouping.getStreamId() == null |
| ? Utils.DEFAULT_STREAM_ID : grouping.getStreamId(); |
| |
| |
| switch (grouping.getType()) { |
| case SHUFFLE: |
| declarer.shuffleGrouping(stream.getFrom(), streamId); |
| break; |
| case FIELDS: |
| List<String> groupingArgs = grouping.getArgs(); |
| if (groupingArgs == null) { |
| throw new IllegalArgumentException("You must supply arguments for Fields grouping"); |
| } |
| declarer.fieldsGrouping(stream.getFrom(), streamId, new Fields(groupingArgs)); |
| break; |
| case ALL: |
| declarer.allGrouping(stream.getFrom(), streamId); |
| break; |
| case GLOBAL: |
| declarer.globalGrouping(stream.getFrom(), streamId); |
| break; |
| case NONE: |
| declarer.noneGrouping(stream.getFrom(), streamId); |
| break; |
| case CUSTOM: |
| declarer.customGrouping(stream.getFrom(), streamId, |
| buildCustomStreamGrouping(stream.getGrouping().getCustomClass(), |
| executionContext, |
| objectBuilder)); |
| break; |
| default: |
| throw new UnsupportedOperationException("unsupported grouping type: " + grouping); |
| } |
| } |
| executionContext.setStreams(componentStreams); |
| } |
| |
| private CustomStreamGrouping buildCustomStreamGrouping(ObjectDefinition objectDefinition, |
| EcoExecutionContext executionContext, |
| ObjectBuilder objectBuilder) |
| throws ClassNotFoundException, |
| IllegalAccessException, InstantiationException, NoSuchFieldException, |
| InvocationTargetException { |
| Object grouping = objectBuilder.buildObject(objectDefinition, executionContext); |
| return (CustomStreamGrouping) grouping; |
| } |
| } |