vinothchandar commented on a change in pull request #991: Hudi Test Suite (Refactor) URL: https://github.com/apache/incubator-hudi/pull/991#discussion_r344980862
########## File path: hudi-bench/src/main/java/org/apache/hudi/bench/dag/DagUtils.java ########## @@ -0,0 +1,247 @@ +/* + * 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.hudi.bench.dag; + +import com.fasterxml.jackson.core.JsonParser; +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.fasterxml.jackson.databind.node.ObjectNode; +import com.fasterxml.jackson.dataformat.yaml.YAMLFactory; +import com.fasterxml.jackson.dataformat.yaml.YAMLGenerator.Feature; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Map.Entry; +import java.util.stream.Collectors; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hudi.bench.configuration.DeltaConfig.Config; +import org.apache.hudi.bench.dag.nodes.BulkInsertNode; +import org.apache.hudi.bench.dag.nodes.CompactNode; +import org.apache.hudi.bench.dag.nodes.DagNode; +import org.apache.hudi.bench.dag.nodes.HiveQueryNode; +import org.apache.hudi.bench.dag.nodes.HiveSyncNode; +import org.apache.hudi.bench.dag.nodes.InsertNode; +import org.apache.hudi.bench.dag.nodes.RollbackNode; +import org.apache.hudi.bench.dag.nodes.ScheduleCompactNode; +import org.apache.hudi.bench.dag.nodes.SparkSQLQueryNode; +import org.apache.hudi.bench.dag.nodes.UpsertNode; +import org.apache.hudi.bench.dag.nodes.ValidateNode; +import org.apache.hudi.common.util.collection.Pair; + +/** + * Utility class to SerDe workflow dag + */ +public class DagUtils { + + static final ObjectMapper mapper = new ObjectMapper(); + + /** + * Converts a YAML path to {@link WorkflowDag} + */ + public static WorkflowDag convertYamlPathToDag(FileSystem fs, String path) throws IOException { + InputStream is = fs.open(new Path(path)); + return convertYamlToDag(toString(is)); + } + + /** + * Converts a YAML representation to {@link WorkflowDag} + */ + public static WorkflowDag convertYamlToDag(String yaml) throws IOException { + Map<String, DagNode> allNodes = new HashMap<>(); + final ObjectMapper yamlReader = new ObjectMapper(new YAMLFactory()); + final JsonNode jsonNode = yamlReader.readTree(yaml); + Iterator<Entry<String, JsonNode>> itr = jsonNode.fields(); + while (itr.hasNext()) { + Entry<String, JsonNode> dagNode = itr.next(); + allNodes.put(dagNode.getKey(), convertJsonToDagNode(allNodes, dagNode.getValue())); + } + return new WorkflowDag(findRootNodes(allNodes)); + } + + /** + * Converts {@link WorkflowDag} to a YAML representation + */ + public static String convertDagToYaml(WorkflowDag dag) throws IOException { + final ObjectMapper yamlWriter = new ObjectMapper(new YAMLFactory().disable(Feature.WRITE_DOC_START_MARKER) + .enable(Feature.MINIMIZE_QUOTES).enable(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES)); + JsonNode yamlNode = mapper.createObjectNode(); + convertDagToYaml(yamlNode, dag.getNodeList()); + return yamlWriter.writerWithDefaultPrettyPrinter().writeValueAsString(yamlNode); + } + + private static void convertDagToYaml(JsonNode yamlNode, List<DagNode> dagNodes) throws IOException { + for (DagNode dagNode : dagNodes) { + String name = dagNode.getConfig().getOtherConfigs().getOrDefault(Config.NODE_NAME, dagNode.getName()).toString(); + ((ObjectNode) yamlNode).put(name, convertDagNodeToJsonNode(dagNode)); + if (dagNode.getChildNodes().size() > 0) { + convertDagToYaml(yamlNode, dagNode.getChildNodes()); + } + } + } + + private static DagNode convertJsonToDagNode(Map<String, DagNode> allNodes, JsonNode node) throws IOException { + String type = node.get(Config.TYPE).asText(); + final DagNode retNode = convertJsonToDagNode(node, type); + Arrays.asList(node.get(Config.DEPENDENCIES).textValue().split(",")).stream().forEach(dep -> { + DagNode parentNode = allNodes.get(dep); + if (parentNode != null) { + parentNode.addChildNode(retNode); + } + }); + return retNode; + } + + private static List<DagNode> findRootNodes(Map<String, DagNode> allNodes) { + final List<DagNode> rootNodes = new ArrayList<>(); + allNodes.entrySet().stream().forEach(entry -> { + if (entry.getValue().getParentNodes().size() < 1) { + rootNodes.add(entry.getValue()); + } + }); + return rootNodes; + } + + private static DagNode convertJsonToDagNode(JsonNode node, String type) { Review comment: +1. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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