org.graylog2.log.GelfJsonAppender Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of gelfj

GELF implementation in Java and log4j appender without any dependencies.

There is a newer version: 1.1.7

package org.graylog2.log;

import java.util.Map;

import org.apache.log4j.spi.ErrorCode;
import org.apache.log4j.spi.LoggingEvent;
import org.graylog2.GelfMessage;
import org.graylog2.GelfMessageFactory;
import org.graylog2.GelfSenderResult;
import org.json.simple.JSONValue;

/**
 * A GelfAppender which will parse the given JSON message into additional fields in GELF
 *
 * @author Anton Yakimov
 * @author Jochen Schalanda
 * @author the-james-burton
 */
public class GelfJsonAppender extends GelfAppender {

  @Override
  protected void append(final LoggingEvent event) {
    GelfMessage gelfMessage = GelfMessageFactory.makeMessage(layout, event, this);

    @SuppressWarnings("unchecked")
    Map fields = (Map) JSONValue.parse(event.getMessage().toString());

    if (fields != null) {
      for (String key : fields.keySet()) {
        gelfMessage.getAdditonalFields().put(key, fields.get(key));
      }
    }

    if (getGelfSender() == null) {
      errorHandler.error("Could not send GELF message. Gelf Sender is not initialised and equals null");
    } else {
      GelfSenderResult gelfSenderResult = getGelfSender().sendMessage(gelfMessage);
      if (!GelfSenderResult.OK.equals(gelfSenderResult)) {
        errorHandler.error("Error during sending GELF message. Error code: " + gelfSenderResult.getCode() + ".",
            gelfSenderResult.getException(), ErrorCode.WRITE_FAILURE);
      }
    }
  }

}