dropwizard-logback-logstash-encoder

Dropwizard logging addon for sending logs using the logstash-logback-encoder. This is needed because Dropwizard overwrites the default mechanism for loading logback configuration (logback.xml) in favor of its application.yml files.

NOTE: This is an actively maintained fork that will closely track dropwizard releases. Currently 0.8.4 is targeted and once 0.9.0 emerges this will be updated as well.

Dropwizard Version Compatibility

• dropwizard 0.8.4 => dropwizard-logstash-encoder 1.1.0
• dropwizard 0.9.0 => dropwizard-logstash-encoder 1.2.0

Installation

Maven:

<dependency>
  <groupId>com.larrymyers</groupId>
  <artifactId>dropwizard-logstash-encoder</artifactId>
  <version>1.2.0</version>
</dependency>

Usage

You must configure dropwizard to use these appenders in your application.yml file:

logging:
  appenders:
    - type: logstash-socket # LogstashSocketAppender, for LogstashTcpSocketAppender use logstash-tcp
      ...

Additional configuration keys for the appender, see logstash-logback-encoder#usage for info. All configs apply to both logstash-socket and logstash-tcp, unless otherwise noted:

• host - string - maps to syslogHost when using logstash-socket, and remoteHost when using logstash-tcp
• port - int
• includeCallerInfo - boolean
• includeContext - boolean
• includeMdc - boolean
• customFields - hashmap - the configuration differs from the original logstash-logback-encoder config in that this is not a raw json string (see example below)
• fieldNames - hashmap
• queueSize - int - only valid for logstash-tcp
• includeCallerData - bool - only valid for logstash-tcp
• prefix - string - pattern written before the JSON object, only valid for logstash-socket
• suffix - string - pattern written after the JSON object, only valid for logstash-socket

For more information about prefixes and suffixes, please refer to logstash-logback-encoder#prefixsuffix.

Example config:

logging:
  appenders:
    - type: logstash-socket
      host: 127.0.0.1
      fieldNames:
        message: msg
        timestamp: log_date
      customFields:
        myTestField1: myTestVal
        myTestField2: 2

Then, loggers can be used the same way as if they were configured using logback.xml for logstash-logback-encoder, example (using Guava):

LoggerFactory.getLogger("myTestLogger").warn(
	appendEntries(
		new ImmutableMap.Builder<String, Object>()
			.put("some_key", 1)
			.put("some_other_key", "two")
			.build()
	),
	"warning! warning!");

License

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.