stopFn := globalSftpMetrics.log(r, f.AccessKey())
	defer stopFn(0, err)

	clnt, err := f.getMinIOClient()
	if err != nil {
		return err
	}

	switch r.Method {
	case "Setstat", "Rename", "Link", "Symlink":
		return sftp.ErrSSHFxOpUnsupported

	case "Rmdir":
		bucket, prefix := path2BucketObject(r.Filepath)
		if bucket == "" {
			return errors.New("deleting all buckets not allowed")

                WitnessRegisterResponse response = rpcClient.register(request);

                if (response != null && response.isSuccess()) {
                    registration.setState(WitnessRegistrationState.REGISTERED);
                    registration.setContextHandle(response.getContextHandle());
                    registrations.put(registration.getRegistrationId(), registration);

    public InetAddress getServerAddress() { return serverAddress; }
    public WitnessServiceType getServiceType() { return serviceType; }
    public WitnessRegistrationState getState() { return state; }
    public void setState(WitnessRegistrationState state) { this.state = state; }
}
```

### 4.2 Witness Notification
```java
package jcifs.internal.witness;

import java.util.List;

        
        // Establish connection
        channel.setState(ChannelState.CONNECTING);
        transport.connect();
        
        // Perform channel binding
        performChannelBinding(channel);
        
        // Add to active channels
        channels.put(channelId, channel);
        channel.setState(ChannelState.ESTABLISHED);
        

    }

    /**
     * Get current channel state
     *
     * @return channel state
     */
    public ChannelState getState() {
        return state;
    }

    /**
     * Set channel state
     *
     * @param state new state
     */
    public void setState(ChannelState state) {
        this.state = state;
    }

    /**
     * Get the time when channel was established
     *

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

        // Wait for timeout
        Thread.sleep(150);

        // Next call should transition to HALF_OPEN
        String result = circuitBreaker.call(() -> "success");
        assertEquals("success", result);
        assertEquals(SimpleCircuitBreaker.State.HALF_OPEN, circuitBreaker.getState());
    }

    @Test

        assertEquals(State.HALF_OPEN, circuitBreaker.getState(), "Circuit should be in HALF_OPEN");

        // One more success should close the circuit (threshold is 2)
        circuitBreaker.executeWithCircuitBreaker(() -> "success2");
        assertEquals(State.CLOSED, circuitBreaker.getState(), "Circuit should be CLOSED after success threshold");
    }

    @Test

            // Reconnect
            channel.setState(ChannelState.CONNECTING);
            // Connection would be ensured through proper transport interface

            // Re-establish channel binding
            manager.performChannelBinding(channel);

            // Update channel with new transport
            channel.setTransport(newTransport);
            channel.setState(ChannelState.ESTABLISHED);

        }

        // Should have some state
        AuthenticationRateLimiter.RateLimiterStats stats = rateLimiter.getStats();
        assertTrue(stats.getActiveAccounts() > 0);

        // Reset
        rateLimiter.reset();

        // State should be cleared
        stats = rateLimiter.getStats();
        assertEquals(0, stats.getTotalBlocked());
        assertEquals(0, stats.getAccountsLocked());

        });
    }

    @Test
    public void testStatistics() throws Exception {
        // Reset stats
        validator.resetStats();

        ServerResponseValidator.ValidationStats stats = validator.getStats();
        assertEquals(0, stats.getTotalValidations());
        assertEquals(0, stats.getFailedValidations());

        // Perform some validations
        try {