net.logstash.logback

Class Logback11Support

java.lang.Object

net.logstash.logback.Logback11Support

public class Logback11Support
extends Object

Provides backwards compatibility at runtime with logback 1.1.x. In logback version 1.2.0, the Encoder interface was changed from writing to an OutputStream to returning byte arrays. This was a backwards incompatible change, therefore some fancy runtime reflection is required to make logstash-logback-encoder work with both pre- and post-1.2 logback versions. This class is used to determine if logback 1.1 is on the runtime classpath (isLogback11OrBefore()), and invoke the old methods on the Encoder interface.

Constructor Summary

Constructors

Constructor and Description
Logback11Support()

Method Summary

Modifier and Type	Method and Description
static void	close(ch.qos.logback.core.encoder.Encoder<?> encoder) Invokes the close method of a logback 1.1 encoder.
static void	doEncode(ch.qos.logback.core.encoder.Encoder<?> encoder, Object event) Invokes the doEncode method of a logback 1.1 encoder, with the given event as the argument.
static void	init(ch.qos.logback.core.encoder.Encoder<?> encoder, OutputStream outputStream) Invokes the init method of a logback 1.1 encoder, with the given outputStream as the argument.
static boolean	isLogback11OrBefore() Returns true if logback 1.1.x or earlier is on the runtime classpath.
static void	verifyLogback11OrBefore() Called by logic that should only execute if logback 1.1.x or earlier is on the runtime classpath.
static void	verifyLogback12OrAfter() Called by logic that should only execute if logback 1.2.x or later is on the runtime classpath.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Logback11Support

public Logback11Support()

Method Detail

isLogback11OrBefore

public static boolean isLogback11OrBefore()

Returns true if logback 1.1.x or earlier is on the runtime classpath. Returns false if logback 1.2.x or later is on the runtime classpath

verifyLogback11OrBefore

public static void verifyLogback11OrBefore()

Called by logic that should only execute if logback 1.1.x or earlier is on the runtime classpath.

Throws:

IllegalStateException - if the logback version is >= 1.2

verifyLogback12OrAfter

public static void verifyLogback12OrAfter()

Called by logic that should only execute if logback 1.2.x or later is on the runtime classpath.

Throws:

IllegalStateException - if the logback version is < 1.2

init

public static void init(ch.qos.logback.core.encoder.Encoder<?> encoder,
                        OutputStream outputStream)
                 throws IOException

Invokes the init method of a logback 1.1 encoder, with the given outputStream as the argument.

Throws:

IOException

doEncode

public static void doEncode(ch.qos.logback.core.encoder.Encoder<?> encoder,
                            Object event)
                     throws IOException

Invokes the doEncode method of a logback 1.1 encoder, with the given event as the argument.

Throws:

IOException

close

public static void close(ch.qos.logback.core.encoder.Encoder<?> encoder)
                  throws IOException

Invokes the close method of a logback 1.1 encoder.

Throws:

IOException