## Context Managers { #context-managers }

### What are "Context Managers" { #what-are-context-managers }

"Context Managers" are any of those Python objects that you can use in a `with` statement.

        }
    }

    /**
     * Create a new directory change notifier
     *
     * @param manager directory lease manager
     */
    public DirectoryChangeNotifier(DirectoryLeaseManager manager) {
        this.leaseManager = manager;
        this.activeWatchers = new ConcurrentHashMap<>();
        this.failureCounts = new ConcurrentHashMap<>();
    }

    /**

    }

    @Test
    public void testAutoCloseable() throws Exception {
        try (SecureKeyManager manager = new SecureKeyManager()) {
            manager.storeSessionKey("auto-session", testKey, "AES");
            assertTrue(manager.hasSessionKey("auto-session"), "Key should exist");
        }
        // Manager should be closed automatically
    }

    @Test
    public void testSecureWipeUtility() {

     */
    protected abstract DictionaryFile<? extends DictionaryItem> newDictionaryFile(String id, String path, Date timestamp);

    /**
     * Sets the dictionary manager for this creator.
     *
     * @param dictionaryManager the dictionary manager to set
     */
    public void setDictionaryManager(final DictionaryManager dictionaryManager) {
        this.dictionaryManager = dictionaryManager;
    }

.29.2](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager) | [amd64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-amd64), [arm64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm64), [ppc64le](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-ppc64le), [s390x](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube...

		Name: "TestScanToEmbedded_1",
		Manager: &User{
			Name:    "TestScanToEmbedded_1_m1",
			Manager: &User{Name: "TestScanToEmbedded_1_m1_m1"},
		},
	}
	DB.Create(&user)

	type UserScan struct {
		ID        uint
		Name      string
		ManagerID *uint
	}
	var user2 UserScan
	err := DB.Raw("SELECT * FROM users INNER JOIN users Manager ON users.manager_id = Manager.id WHERE users.id = ?", user.ID).Scan(&user2).Error

4](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-controller-manager) | [amd64](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-controller-manager-amd64), [arm64](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-controller-manager-arm64), [ppc64le](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/...

    /**
     * Default constructor.
     * Initializes the API manager with the admin server path prefix.
     */
    public SearchEngineApiManager() {
        super();
        setPathPrefix(ADMIN_SERVER);
    }

    /**
     * Registers this API manager with the web API manager factory.
     * Called automatically after construction via @PostConstruct.
     */
    @PostConstruct

    }

    /**
     * Get the channel manager
     *
     * @return channel manager instance
     */
    public ChannelManager getChannelManager() {
        return channelManager;
    }

    /**
     * Get the lease manager for SMB3 lease support
     *
     * @return lease manager instance
     */
    public LeaseManager getLeaseManager() {

v1.25.16](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager) | [amd64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-amd64), [arm](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm), [arm64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm64), [ppc64le](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-co...