com.ottogroup.bi.streaming.operator.json.converter.StringToJsonObject.java Source code

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Here is the source code for com.ottogroup.bi.streaming.operator.json.converter.StringToJsonObject.java

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/**
 * Copyright 2016 Otto (GmbH & Co KG)
 *
 * 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 com.ottogroup.bi.streaming.operator.json.converter;

import org.apache.commons.lang3.StringUtils;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.util.Collector;
import org.apache.log4j.Logger;
import org.apache.sling.commons.json.JSONObject;

/**
 * Converts incoming strings to {@link JSONObject} representations
 * @author mnxfst
 * @since Sep 14, 2015
 */
public class StringToJsonObject implements FlatMapFunction<String, JSONObject> {

    private static final long serialVersionUID = 4573928723585302447L;
    private static Logger LOG = Logger.getLogger(StringToJsonObject.class);

    /**
     * @see org.apache.flink.api.common.functions.FlatMapFunction#flatMap(java.lang.Object, org.apache.flink.util.Collector)
     */
    public void flatMap(String content, Collector<JSONObject> collector) throws Exception {
        if (StringUtils.isNotBlank(content)) {
            try {
                if (collector != null && StringUtils.isNotBlank(content))
                    collector.collect(new JSONObject(content));
            } catch (Exception e) {
                LOG.error("Failed to convert incoming string into JSON object representation. Reason: "
                        + e.getMessage(), e);
            }
        }
    }

}