2 * ===============================LICENSE_START======================================
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4 * ================================================================================
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5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
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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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21 package org.openecomp.dcae.apod.analytics.cdap.plugins.transform.filter;
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23 import co.cask.cdap.api.annotation.Description;
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24 import co.cask.cdap.api.annotation.Name;
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25 import co.cask.cdap.api.annotation.Plugin;
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26 import co.cask.cdap.api.data.format.StructuredRecord;
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27 import co.cask.cdap.api.data.schema.Schema;
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28 import co.cask.cdap.etl.api.Emitter;
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29 import co.cask.cdap.etl.api.PipelineConfigurer;
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30 import co.cask.cdap.etl.api.Transform;
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31 import co.cask.cdap.etl.api.TransformContext;
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32 import com.google.common.base.Splitter;
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33 import com.google.common.collect.Maps;
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34 import com.google.common.collect.Sets;
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35 import org.openecomp.dcae.apod.analytics.cdap.common.utils.ValidationUtils;
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36 import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.config.filter.JsonPathFilterPluginConfig;
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37 import org.openecomp.dcae.apod.analytics.cdap.plugins.utils.CDAPPluginUtils;
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38 import org.openecomp.dcae.apod.analytics.cdap.plugins.validator.JsonPathFilterPluginConfigValidator;
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39 import org.openecomp.dcae.apod.analytics.common.service.filter.JsonMessageFilterProcessorContext;
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40 import org.openecomp.dcae.apod.analytics.common.utils.MessageProcessorUtils;
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41 import org.slf4j.Logger;
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42 import org.slf4j.LoggerFactory;
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44 import java.util.Map;
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45 import java.util.Set;
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48 * Json Path filter Plugin filters incoming schema field based of given json path expected values
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50 * @author Rajiv Singla . Creation Date: 3/2/2017.
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53 @Plugin(type = Transform.PLUGIN_TYPE)
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54 @Name("JsonPathFilter")
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55 @Description("Filters incoming schema field based of given json path expected values")
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56 public class JsonPathFilter extends Transform<StructuredRecord, StructuredRecord> {
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58 private static final Logger LOG = LoggerFactory.getLogger(JsonPathFilter.class);
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60 private final JsonPathFilterPluginConfig pluginConfig;
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61 private final Map<String, Set<String>> jsonFilterPathMappings;
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63 public JsonPathFilter(final JsonPathFilterPluginConfig pluginConfig) {
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64 this.pluginConfig = pluginConfig;
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65 jsonFilterPathMappings = Maps.newHashMap();
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66 LOG.info("Created instance of Json Path Filter Plugin with plugin config: {}", pluginConfig);
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71 public void initialize(final TransformContext context) throws Exception {
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72 super.initialize(context);
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73 populateJsonFilterMapping();
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77 public void configurePipeline(final PipelineConfigurer pipelineConfigurer) {
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78 super.configurePipeline(pipelineConfigurer);
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79 ValidationUtils.validateSettings(pluginConfig, new JsonPathFilterPluginConfigValidator());
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80 final Schema inputSchema = pipelineConfigurer.getStageConfigurer().getInputSchema();
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81 CDAPPluginUtils.validateSchemaContainsFields(inputSchema, pluginConfig.getIncomingJsonFieldName());
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82 populateJsonFilterMapping();
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83 CDAPPluginUtils.setOutputSchema(pipelineConfigurer, pluginConfig.getSchema());
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87 public void transform(final StructuredRecord inputStructuredRecord, final Emitter<StructuredRecord> emitter)
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90 // get input json message
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91 final String jsonMessage = inputStructuredRecord.get(pluginConfig.getIncomingJsonFieldName());
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93 // process Json Filter Mappings
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94 final JsonMessageFilterProcessorContext jsonMessageFilterProcessorContext =
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95 MessageProcessorUtils.processJsonFilterMappings(jsonMessage, jsonFilterPathMappings);
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97 // create new output record builder and copy any input Structured record values to output record builder
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98 final Schema outputSchema = Schema.parseJson(pluginConfig.getSchema());
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99 final StructuredRecord.Builder outputRecordBuilder =
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100 CDAPPluginUtils.createOutputStructuredRecordBuilder(outputSchema, inputStructuredRecord);
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102 // add json filter matched field
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103 final StructuredRecord.Builder outputRecordBuilderWithMatchedField =
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104 CDAPPluginUtils.addFieldValueToStructuredRecordBuilder(outputRecordBuilder,
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105 outputSchema, pluginConfig.getOutputSchemaFieldName(),
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106 jsonMessageFilterProcessorContext.getMatched());
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108 // emit structured record with filtering matched field
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109 final StructuredRecord outputStructuredRecord = outputRecordBuilderWithMatchedField.build();
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111 LOG.debug("Incoming Json Message: {}.Json Path Filter Output Matched Field: {}", jsonMessage,
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112 outputStructuredRecord.get(pluginConfig.getOutputSchemaFieldName()));
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114 emitter.emit(outputStructuredRecord);
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119 * Populates Json Filter Mapping
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121 private void populateJsonFilterMapping() {
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122 final Map<String, String> fieldMappings =
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123 CDAPPluginUtils.extractFieldMappings(pluginConfig.getJsonFilterMappings());
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124 if (fieldMappings.isEmpty()) {
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125 throw new IllegalArgumentException("No Field Mapping found. Invalid Filter mapping configuration");
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127 final Splitter semiColonSplitter = Splitter.on(";");
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128 for (Map.Entry<String, String> fieldMappingEntry : fieldMappings.entrySet()) {
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129 jsonFilterPathMappings.put(fieldMappingEntry.getKey(),
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130 Sets.newLinkedHashSet(semiColonSplitter.split(fieldMappingEntry.getValue())));
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132 LOG.info("Input Json Filter Mappings: {}", jsonFilterPathMappings);
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