public static void setLoggerImplType(String type) {
        if (loggerImplType != -1) {
            throw new IllegalStateException("TTL logger implementation type is already set! type = " + loggerImplType);
        }

        if (STDERR.equalsIgnoreCase(type)) loggerImplType = 0;
        else if (STDOUT.equalsIgnoreCase(type)) loggerImplType = 1;
        else loggerImplType = 0;
    }
Logger adaptor for ttl TTL agent/transformlet. Only use for TTL agent/transformlet!

@author Jerry Lee (oldratlee at gmail dot com)
@see TtlTransformlet
@see TtlAgent
ttl-agent/src/main/java/com/alibaba/ttl3/agent/logging/Logger.java