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[FLINK-6393] [gelly] Add Circulant and Echo graph generators
This closes apache#3802
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129 changes: 129 additions & 0 deletions
129
...ink-gelly-examples/src/main/java/org/apache/flink/graph/drivers/input/CirculantGraph.java
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| /* | ||
| * 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:https://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. | ||
| */ | ||
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| package org.apache.flink.graph.drivers.input; | ||
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| import org.apache.flink.api.java.ExecutionEnvironment; | ||
| import org.apache.flink.api.java.utils.ParameterTool; | ||
| import org.apache.flink.client.program.ProgramParametrizationException; | ||
| import org.apache.flink.graph.Graph; | ||
| import org.apache.flink.graph.drivers.parameter.LongParameter; | ||
| import org.apache.flink.graph.generator.CirculantGraph.OffsetRange; | ||
| import org.apache.flink.types.LongValue; | ||
| import org.apache.flink.types.NullValue; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.TreeMap; | ||
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| import static org.apache.flink.api.common.ExecutionConfig.PARALLELISM_DEFAULT; | ||
| import static org.apache.flink.graph.generator.CirculantGraph.MINIMUM_VERTEX_COUNT; | ||
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| /** | ||
| * Generate a {@link org.apache.flink.graph.generator.CirculantGraph}. | ||
| */ | ||
| public class CirculantGraph | ||
| extends GeneratedGraph<LongValue> { | ||
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| private static final String PREFIX = "range"; | ||
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| private LongParameter vertexCount = new LongParameter(this, "vertex_count") | ||
| .setMinimumValue(MINIMUM_VERTEX_COUNT); | ||
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| private LongParameter littleParallelism = new LongParameter(this, "little_parallelism") | ||
| .setDefaultValue(PARALLELISM_DEFAULT); | ||
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| private List<OffsetRange> offsetRanges = new ArrayList<>(); | ||
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| @Override | ||
| public String getName() { | ||
| return CirculantGraph.class.getSimpleName(); | ||
| } | ||
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| @Override | ||
| public String getUsage() { | ||
| return "--" + PREFIX + "0 offset:length [--" + PREFIX + "1 offset:length [--" + PREFIX + "2 ...]]" | ||
| + super.getUsage(); | ||
| } | ||
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| @Override | ||
| public void configure(ParameterTool parameterTool) throws ProgramParametrizationException { | ||
| super.configure(parameterTool); | ||
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| // add offset ranges as ordered by offset ID (range0, range1, range2, ...) | ||
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| Map<Integer, String> offsetRangeMap = new TreeMap<>(); | ||
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| // first parse all offset ranges into a sorted map | ||
| for (String key : parameterTool.toMap().keySet()) { | ||
| if (key.startsWith(PREFIX)) { | ||
| int offsetId = Integer.parseInt(key.substring(PREFIX.length())); | ||
| offsetRangeMap.put(offsetId, parameterTool.get(key)); | ||
| } | ||
| } | ||
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| // then store offset ranges in order | ||
| for (String field : offsetRangeMap.values()) { | ||
| ProgramParametrizationException exception = new ProgramParametrizationException("Circulant offset range" + | ||
| " must use a colon to separate the integer offset and integer length:" + field + "'"); | ||
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| if (! field.contains(":")) { | ||
| throw exception; | ||
| } | ||
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| String[] parts = field.split(":"); | ||
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| if (parts.length != 2) { | ||
| throw exception; | ||
| } | ||
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| try { | ||
| long offset = Long.parseLong(parts[0]); | ||
| long length = Long.parseLong(parts[1]); | ||
| offsetRanges.add(new OffsetRange(offset, length)); | ||
| } catch (NumberFormatException ex) { | ||
| throw exception; | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| public String getIdentity() { | ||
| return getTypeName() + " " + getName() + " (" + offsetRanges + ")"; | ||
| } | ||
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| @Override | ||
| protected long vertexCount() { | ||
| return vertexCount.getValue(); | ||
| } | ||
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| @Override | ||
| public Graph<LongValue, NullValue, NullValue> generate(ExecutionEnvironment env) { | ||
| org.apache.flink.graph.generator.CirculantGraph graph = new org.apache.flink.graph.generator.CirculantGraph(env, | ||
| vertexCount.getValue()); | ||
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| for (OffsetRange offsetRange : offsetRanges) { | ||
| graph.addRange(offsetRange.getOffset(), offsetRange.getLength()); | ||
| } | ||
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| return graph | ||
| .setParallelism(littleParallelism.getValue().intValue()) | ||
| .generate(); | ||
| } | ||
| } |
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