append(buf, "percent", () -> osProbe.getSystemCpuPercent());
        final OsStats osStats = osProbe.osStats();
        buf.append("},");
        append(buf, "load_averages", () -> osStats.getCpu().getLoadAverage());
        buf.append("},");
    }

    private void appendFesenStats(final StringBuilder buf) {
        String stats = null;
        try {

     */
    // GET /api/admin/stats
    @Execute
    public JsonResponse<ApiResult> index() {
        final HashMap<String, Object> stats = new HashMap<>();
        stats.put("jvm", getJvmObj());
        stats.put("os", getOsObj());
        stats.put("process", getProcessObj());
        stats.put("engine", getEngineObj());
        stats.put("fs", getFsObj());

        RdmaStatistics stats = new RdmaStatistics();

        // Simulate various RDMA operations
        stats.recordRdmaRead(1024, 1000000); // 1KB in 1ms
        stats.recordRdmaWrite(2048, 2000000); // 2KB in 2ms
        stats.recordRdmaSend(512, 500000); // 512B in 0.5ms
        stats.recordRdmaReceive(1536, 1500000); // 1.5KB in 1.5ms
        stats.recordError();

        // Verify counters

        System.arraycopy(src, srcIndex + namesLength, this.macAddress, 0, 6);
        srcIndex += readNodeNameArray(src, srcIndex);
        this.stats = new byte[statsLength];
        System.arraycopy(src, srcIndex, this.stats, 0, statsLength);
        srcIndex += statsLength;
        return srcIndex - start;
    }

    private int readNodeNameArray(final byte[] src, int srcIndex) {

        assertEquals(SimpleCircuitBreaker.State.CLOSED, circuitBreaker.getState());

        SimpleCircuitBreaker.Statistics stats = circuitBreaker.getStatistics();
        assertEquals(1, stats.totalCalls);
        assertEquals(1, stats.totalSuccesses);
        assertEquals(0, stats.totalFailures);
        assertEquals(1.0, stats.successRate);
    }

    @Test
    @DisplayName("Test circuit opens after failure threshold")

        resourceManager.markClosed(id1);

        Map<String, Object> stats = resourceManager.getStatistics();

        assertNotNull(stats);
        assertTrue((long) stats.get("totalAllocated") >= 2);
        assertTrue((long) stats.get("totalReleased") >= 1);
        assertNotNull(stats.get("activeResources"));
        assertNotNull(stats.get("closedResources"));
    }

    @Test

        } catch (SmbException e) {
            // Expected
        }

        stats = validator.getStats();
        assertTrue(stats.getTotalValidations() > 0);
        assertTrue(stats.getFailedValidations() > 0);
        assertTrue(stats.getFailureRate() > 0);
        assertTrue(stats.getFailureRate() <= 1.0);
    }

    @Test
    public void testBufferOverflowPrevention() throws Exception {

        // Check stats
        stats = rateLimiter.getStats();
        assertEquals(2, stats.getTotalBlocked()); // One for account, one for IP
        assertEquals(1, stats.getAccountsLocked());
        assertEquals(1, stats.getIpsBlocked());
        assertTrue(stats.getActiveAccounts() > 0);
        assertTrue(stats.getActiveIps() > 0);
    }

    @Test

        Map<EventType, Long> stats = logger.getStatistics();
        assertEquals(Long.valueOf(1), stats.get(EventType.AUTHENTICATION_SUCCESS), "Should have 1 authentication success event");
        assertEquals(Long.valueOf(1), stats.get(EventType.AUTHENTICATION_FAILURE), "Should have 1 authentication failure event");
        assertEquals(Long.valueOf(1), stats.get(EventType.FILE_ACCESS), "Should have 1 file access event");

        assertEquals(12, parsedStats.length); // 12 bytes total for stats
        // The stats array in NodeStatusResponse contains everything after names
        // MAC is at index 0-5, actual stats at 6-11
        byte[] expectedStats = new byte[12];
        System.arraycopy(testMac, 0, expectedStats, 0, 6); // MAC at beginning
        System.arraycopy(stats, 0, expectedStats, 6, 6); // Stats after MAC
        assertArrayEquals(expectedStats, parsedStats);