2 * ============LICENSE_START=======================================================
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4 * ================================================================================
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5 * Copyright 2019 China Mobile
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6 *=================================================================================
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7 * Licensed under the Apache License, Version 2.0 (the "License");
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8 * you may not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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18 * ============LICENSE_END=========================================================
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20 package org.onap.datalake.feeder.util;
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22 import com.fasterxml.jackson.databind.JsonNode;
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23 import com.fasterxml.jackson.databind.ObjectMapper;
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24 import com.fasterxml.jackson.databind.node.JsonNodeType;
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25 import lombok.Getter;
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26 import org.apache.velocity.Template;
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27 import org.apache.velocity.VelocityContext;
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28 import org.apache.velocity.app.Velocity;
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29 import org.apache.velocity.runtime.RuntimeConstants;
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30 import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
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31 import org.slf4j.Logger;
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32 import org.slf4j.LoggerFactory;
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34 import java.io.BufferedWriter;
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35 import java.io.FileWriter;
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36 import java.io.IOException;
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37 import java.net.MalformedURLException;
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38 import java.util.ArrayList;
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39 import java.util.Iterator;
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40 import java.util.List;
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41 import java.util.Map.Entry;
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45 * read sample json and output supervisor to resources\druid\generated
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46 * need manual edit to be production ready, final versions are in resources\druid
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48 * http://druid.io/docs/latest/tutorials/tutorial-ingestion-spec.html
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49 * http://druid.io/docs/latest/ingestion/flatten-json
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53 * reduce the manual editing
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56 * auto get sample, and for each topic, get multiple samples.
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57 * make supervisor file names consistent
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58 * dimension type default is string, in msgrtr.apinode.metrics.dmaap , many are long/double, so need to generate dimensionsSpec, this is done at the end of printFlattenSpec()
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62 public class DruidSupervisorGenerator {
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64 private final Logger log = LoggerFactory.getLogger(this.getClass());
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66 Template template = null;
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67 VelocityContext context;
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69 List<String[]> dimensions;
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71 public DruidSupervisorGenerator() {
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72 dimensions = new ArrayList<>();
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74 Velocity.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
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75 Velocity.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
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79 context = new VelocityContext();
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81 context.put("host", "message-router-kafka:9092");//TODO get from config
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83 template = Velocity.getTemplate("druid/kafka-supervisor-template.vm");
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86 private void printNode(String prefix, JsonNode node) {
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88 // lets see what type the node is
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89 // System.out.println("NodeType=" + node.getNodeType() + ", isContainerNode=" + node.isContainerNode() + ", " + node); // prints OBJECT
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91 if (node.isContainerNode()) {
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93 Iterator<Entry<String, JsonNode>> fields = node.fields();
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95 while (fields.hasNext()) {
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96 Entry<String, JsonNode> field = fields.next();
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97 printNode(prefix + "." + field.getKey(), field.getValue());
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100 if (node.isArray()) {
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101 Iterator<JsonNode> elements = node.elements();
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103 while (elements.hasNext()) {
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104 JsonNode element = elements.next();
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105 printNode(prefix + "[" + i + "]", element);
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111 printFlattenSpec(node.getNodeType(), prefix);
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116 private void printFlattenSpec(JsonNodeType type, String path) {
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117 String name = path.substring(2).replace('.', ':');
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118 // lets see what type the node is
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120 log.info("\"type\": \"path\",");
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121 log.info("\"name\": \"" + name + "\",");
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122 log.info("\"expr\": \"" + path + "\"");
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125 dimensions.add(new String[]{name, path});
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128 public void doTopic(String topic) throws IOException {
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129 dimensions.clear();
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131 String sampleFileName = "src/main/resources/druid/" + topic + "-sample-format.json";//FIXME hard coded path
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132 String outputFileName = "src/main/resources/druid/generated/" + topic + "-kafka-supervisor.json";
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134 // Get the contents of json as a string using commons IO IOUTils class.
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135 String sampleJson = Util.getTextFromFile(sampleFileName);
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137 // create an ObjectMapper instance.
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138 ObjectMapper mapper = new ObjectMapper();
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139 // use the ObjectMapper to read the json string and create a tree
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140 JsonNode root = mapper.readTree(sampleJson);
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141 printNode("$", root);
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143 context.put("topic", topic);
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144 context.put("timestamp", "event-header:timestamp");//FIXME hard coded, should be topic based
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145 context.put("timestampFormat", "yyyyMMdd-HH:mm:ss:SSS");//FIXME hard coded, should be topic based
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146 context.put("dimensions", dimensions);
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148 BufferedWriter out = new BufferedWriter(new FileWriter(outputFileName));
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150 template.merge(context, out);
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154 public static void main(String[] args) throws MalformedURLException, IOException {
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155 String[] topics = new String[]{"AAI-EVENT", "msgrtr.apinode.metrics.dmaap", "unauthenticated.DCAE_CL_OUTPUT", "unauthenticated.SEC_FAULT_OUTPUT"};//FIXME hard coded
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157 DruidSupervisorGenerator p = new DruidSupervisorGenerator();
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159 for (String topic : topics) {
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