com.pptv.sp.flume.sink.elasticsearch.ElasticSearchJsonLogStashEventSerializer.java Source code

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Here is the source code for com.pptv.sp.flume.sink.elasticsearch.ElasticSearchJsonLogStashEventSerializer.java

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/*
 * 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 com.pptv.sp.flume.sink.elasticsearch;

import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang.StringUtils;
import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.flume.conf.ComponentConfiguration;
import org.apache.flume.sink.elasticsearch.ContentBuilderUtil;
import org.apache.flume.sink.elasticsearch.ElasticSearchEventSerializer;
import org.elasticsearch.common.collect.Maps;
import org.elasticsearch.common.xcontent.XContentBuilder;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

public class ElasticSearchJsonLogStashEventSerializer implements ElasticSearchEventSerializer {

    @Override
    public XContentBuilder getContentBuilder(Event event) throws IOException {
        XContentBuilder builder = jsonBuilder().startObject();
        appendBody(builder, event);
        appendHeaders(builder, event);
        return builder;
    }

    private void appendBody(XContentBuilder builder, Event event) throws IOException, UnsupportedEncodingException {
        String body = new String(event.getBody());
        JsonParser parser = new JsonParser();
        JsonObject jsonObj = parser.parse(body).getAsJsonObject();
        for (Entry<String, JsonElement> kv : jsonObj.entrySet()) {
            ContentBuilderUtil.appendField(builder, kv.getKey(), kv.getValue().getAsString().getBytes());
            //kv.getValue().getAsByte();
        }
        //ContentBuilderUtil.appendField(builder, "@message", body);
    }

    private void appendHeaders(XContentBuilder builder, Event event) throws IOException {
        Map<String, String> headers = Maps.newHashMap(event.getHeaders());

        String timestamp = headers.get("timestamp");
        if (!StringUtils.isBlank(timestamp) && StringUtils.isBlank(headers.get("@timestamp"))) {
            long timestampMs = Long.parseLong(timestamp);
            builder.field("@timestamp", new Date(timestampMs));
        }

        String source = headers.get("source");
        if (!StringUtils.isBlank(source) && StringUtils.isBlank(headers.get("@source"))) {
            ContentBuilderUtil.appendField(builder, "@source", source.getBytes(charset));
        }

        String type = headers.get("type");
        if (!StringUtils.isBlank(type) && StringUtils.isBlank(headers.get("@type"))) {
            ContentBuilderUtil.appendField(builder, "@type", type.getBytes(charset));
        }

        String host = headers.get("host");
        if (!StringUtils.isBlank(host) && StringUtils.isBlank(headers.get("@source_host"))) {
            ContentBuilderUtil.appendField(builder, "@source_host", host.getBytes(charset));
        }

        String srcPath = headers.get("src_path");
        if (!StringUtils.isBlank(srcPath) && StringUtils.isBlank(headers.get("@source_path"))) {
            ContentBuilderUtil.appendField(builder, "@source_path", srcPath.getBytes(charset));
        }

        builder.startObject("@fields");
        for (String key : headers.keySet()) {
            byte[] val = headers.get(key).getBytes(charset);
            ContentBuilderUtil.appendField(builder, key, val);
        }
        builder.endObject();
    }

    @Override
    public void configure(Context context) {
        // NO-OP...
    }

    @Override
    public void configure(ComponentConfiguration conf) {
        // NO-OP...
    }
}