public void pushByKey()

in slf4j-to-log4j-api/src/main/java/org/apache/logging/slf4j/Log4jMDCAdapter.java [71:82]

• 12 lines of code
• 3 McCabe index (conditional complexity)

    public void pushByKey(final String key, final String value) {
        if (key == null) {
            ThreadContext.push(value);
        } else {
            final String oldValue = mapOfStacks.peekByKey(key);
            if (!Objects.equals(ThreadContext.get(key), oldValue)) {
                LOGGER.warn("The key {} was used in both the string and stack-valued MDC.", key);
            }
            mapOfStacks.pushByKey(key, value);
            ThreadContext.put(key, value);
        }
    }