lastDriveStatsRefresh time.Time
)

// PeerResourceMetrics represents the resource metrics
// retrieved from a peer, along with errors if any
type PeerResourceMetrics struct {
	Metrics map[MetricSubsystem]ResourceMetrics
	Errors  []string
}

// ResourceMetrics is a map of unique key identifying
// a resource metric (e.g. reads_per_sec_{node}_{drive})
// to its data
type ResourceMetrics map[string]ResourceMetric

    }

    /**
     * Create a managed resource wrapper
     *
     * @param <T> resource type
     * @param resource the resource to wrap
     * @return managed resource
     */
    public <T extends AutoCloseable> ManagedResource<T> manage(T resource) {
        String resourceId = registerResource(resource);
        return new ManagedResource<>(resource, resourceId, this);
    }

    /**

	}

	// No locks held on the all resources, so claim write
	// lock on all resources at once.
	now := UTCNow()
	for i, resource := range args.Resources {
		l.lockMap[resource] = []lockRequesterInfo{
			{
				Name:            resource,
				Writer:          true,
				Source:          args.Source,
				Owner:           args.Owner,
				UID:             args.UID,
				Timestamp:       now.UnixNano(),

        // Then
        assertNotNull(resource1, "First resource should be created");
        assertNotNull(resource2, "Second resource should be created");
        assertNotNull(pipe1, "First pipe should be created");
        assertNotNull(pipe2, "Second pipe should be created");

        assertNotSame(resource1, resource2, "Different resources should be different instances");

            assertTrue(resource.exists(), "Resource should exist");
            assertTrue(resource.isFile(), "Should be a file");
            assertTrue(resource.canWrite(), "Should be writable");

            // Should be able to perform file operations
            assertDoesNotThrow(() -> {
                resource.setReadOnly();
                resource.setReadWrite();
                resource.setAttributes(0x20);

		locksHeld[resource] = []lockRequesterInfo{lri}
	}

	// Add a few concurrent read locks to the mix
	for i := range 50 {
		resource := fmt.Sprintf("bucket/get-object-%d", i)
		lri := lockRequesterInfo{
			Name:   resource,
			UID:    mustGetUUID(),
			Owner:  owners[i%len(owners)],
			Quorum: 2,
		}
		lris = append(lris, lri)
		locksHeld[resource] = append(locksHeld[resource], lri)

        assertTrue(iterator.hasNext());
        assertSame(resource, iterator.next());

        assertTrue(iterator.hasNext());
        assertSame(resource, iterator.next());

        assertTrue(iterator.hasNext());
        assertSame(resource, iterator.next());

        assertFalse(iterator.hasNext());
        assertNull(iterator.next());

        verify(resource, never()).close();
    }

    @Test

     * Service for managing URL queues during crawling.
     */
    @Resource
    protected UrlQueueService<UrlQueue<?>> urlQueueService;

    /**
     * Service for managing access result data.
     */
    @Resource
    protected DataService<AccessResult<?>> dataService;

    /**
     * Filter for URLs to control which URLs are crawled.
     */
    @Resource
    protected UrlFilter urlFilter;

    /**

    @Resource
    protected ActivityHelper activityHelper;

    /** Manager for handling HTTP response operations. */
    @Resource
    protected ResponseManager responseManager;

    /** Time manager for handling date and time operations. */
    @Resource
    protected TimeManager timeManager;

    /** System helper for various system-level operations. */
    @Resource
    protected SystemHelper systemHelper;

                        false), MESSAGE_TOO_LARGE("Message too large", ErrorCategory.PROTOCOL, false),

        // Resource errors
        OUT_OF_MEMORY("Out of memory", ErrorCategory.RESOURCE, true), TOO_MANY_SESSIONS("Too many sessions", ErrorCategory.RESOURCE,
                true), RESOURCE_LOCKED("Resource is locked", ErrorCategory.RESOURCE, true),

        // Transient errors