com.goodow.realtime.java.logging.LogstashFormatter Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of realtime-android Show documentation
The newest version!
/*
 * Copyright 2013 Goodow.com
 * 
 * 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.goodow.realtime.java.logging;

import com.goodow.realtime.json.Json;
import com.goodow.realtime.json.JsonObject;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;

/**
 * Java Util Logging formatter to encode logging events as json events which can consumed by
 * logstash
 */
public class LogstashFormatter extends Formatter {
  private static String LINE_SEPARATOR = System.getProperty("line.separator");

  @Override
  public String format(LogRecord record) {
    JsonObject obj = Json.createObject();
    obj.set("thread", Thread.currentThread().getName());
    Date date = new Date();
    SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss,SSS");
    // Minimize memory allocations here.
    date.setTime(record.getMillis());
    obj.set("@timestamp", dateFormat.format(date));
    obj.set("priority", record.getLevel().toString());
    obj.set("logger_name", record.getLoggerName());

    obj.set("message", record.getMessage());
    encodeFields(record, obj);

    return obj.toJsonString() + LINE_SEPARATOR;
  }

  private JsonObject encodeFields(final LogRecord record, JsonObject obj) {
    if (record.getThrown() != null) {
      try {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        record.getThrown().printStackTrace(pw);
        pw.close();
        obj.set("stack_trace", sw.toString());
      } catch (Exception ex) {
      }
    }
    return obj;
  }
}