core/src/test/resources/logback.xml

<?xml version="1.0"?>
<configuration scan="false">
    <appender name="FILE" class="ch.qos.logback.core.FileAppender">
        <file>target/test-data/jclouds.log</file>
        <encoder>
            <Pattern>%d %-5p [%c] [%thread] %m%n</Pattern>
        </encoder>
    </appender>
    <appender name="WIREFILE" class="ch.qos.logback.core.FileAppender">
        <file>target/test-data/jclouds-wire.log</file>
        <encoder>
            <Pattern>%d %-5p [%c] [%thread] %m%n</Pattern>
        </encoder>
    </appender>

    <root>
        <level value="warn" />
    </root>

    <logger name="org.jclouds">
        <level value="DEBUG" />
        <appender-ref ref="FILE" />
    </logger>
    <logger name="jclouds.wire">
        <level value="DEBUG" />
        <appender-ref ref="WIREFILE" />
    </logger>
    <logger name="jclouds.headers">
        <level value="DEBUG" />
        <appender-ref ref="WIREFILE" />
    </logger>

</configuration>