// Add MDC context efficiently
        context.put("thread", Thread.currentThread().getName());
        context.put("threadId", Thread.currentThread().getId());

        String sessionId = MDC.get("sessionId");
        if (sessionId != null) {
            context.put("sessionId", sessionId);
        }
        String userId = MDC.get("userId");
        if (userId != null) {

    public static final int EXIT_OK = 0;

    /** Exit code for failed operation. */
    public static final int EXIT_FAIL = 1;

    /** Document crawler format identifier. */
    public static final String DCF = "dcf";

    /** Constant representing all languages. */
    public static final String ALL_LANGUAGES = "all";

    /** Invalid numeric parameter value. */

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