org.streampipes.wrapper.spark.converter.JsonToMapFormat Maven / Gradle / Ivy
/*
* Copyright 2018 FZI Forschungszentrum Informatik
*
* Licensed 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.streampipes.wrapper.spark.converter;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.spark.api.java.function.FlatMapFunction;
import org.streampipes.logging.impl.EventStatisticLogger;
import org.streampipes.model.base.InvocableStreamPipesEntity;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Created by Jochen Lutz on 2018-01-11.
*/
public class JsonToMapFormat implements FlatMapFunction, Map> {
private static final long serialVersionUID = 1L;
private ObjectMapper mapper;
private InvocableStreamPipesEntity graph;
public JsonToMapFormat(InvocableStreamPipesEntity graph) {
this.mapper = new ObjectMapper();
this.graph = graph;
}
@Override
public Iterator> call(ConsumerRecord s) throws Exception {
HashMap json = mapper.readValue(s.value(), HashMap.class);
System.out.println(s.value());
EventStatisticLogger.log(graph.getName(), graph.getCorrespondingPipeline(), graph.getUri());
return Arrays.asList((Map)json).iterator();
}
}