public String popByKey()

in slf4j-to-log4j-api/src/main/java/org/apache/logging/slf4j/Log4jMDCAdapter.java [85:95]

• 11 lines of code
• 4 McCabe index (conditional complexity)

    public String popByKey(final String key) {
        if (key == null) {
            return ThreadContext.getDepth() > 0 ? ThreadContext.pop() : null;
        }
        final String value = mapOfStacks.popByKey(key);
        if (!Objects.equals(ThreadContext.get(key), value)) {
            LOGGER.warn("The key {} was used in both the string and stack-valued MDC.", key);
        }
        ThreadContext.put(key, mapOfStacks.peekByKey(key));
        return value;
    }