Compute Engine v1 API - Class MachineTypesClient (2.5.0)

public abstract class MachineTypesClient

Reference documentation and code samples for the Compute Engine v1 API class MachineTypesClient.

MachineTypes client wrapper, for convenient use.

Inheritance

Object > MachineTypesClient

Inherited Members

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ToString()

Derived Types

MachineTypesClientImpl

Namespace

Google.Cloud.Compute.V1

Assembly

Google.Cloud.Compute.V1.dll

Remarks

The MachineTypes API.

Properties

DefaultEndpoint

public static string DefaultEndpoint { get; }

The default endpoint for the MachineTypes service, which is a host of "compute.googleapis.com" and a port of 443.

Property Value
Type	Description
`String`

DefaultScopes

public static IReadOnlyList<string> DefaultScopes { get; }

The default MachineTypes scopes.

Property Value
Type	Description
`IReadOnlyList<String>`

Remarks

The default MachineTypes scopes are:

GrpcClient

public virtual MachineTypes.MachineTypesClient GrpcClient { get; }

The underlying gRPC MachineTypes client

Property Value
Type	Description
`MachineTypes.MachineTypesClient`

ServiceMetadata

public static ServiceMetadata ServiceMetadata { get; }

The service metadata associated with this client type.

Property Value
Type	Description
`ServiceMetadata`

Methods

AggregatedList(AggregatedListMachineTypesRequest, CallSettings)

public virtual PagedEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> AggregatedList(AggregatedListMachineTypesRequest request, CallSettings callSettings = null)

Retrieves an aggregated list of machine types.

Parameters
Name	Description
`request`	`AggregatedListMachineTypesRequest` The request object containing all of the parameters for the API call.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedEnumerable<MachineTypeAggregatedList, KeyValuePair<String, MachineTypesScopedList>>`	A pageable sequence of KeyValuePair<TKey,TValue> resources.

Example

// Create client
MachineTypesClient machineTypesClient = MachineTypesClient.Create();
// Initialize request argument(s)
AggregatedListMachineTypesRequest request = new AggregatedListMachineTypesRequest
{
    OrderBy = "",
    Project = "",
    Filter = "",
    IncludeAllScopes = false,
    ReturnPartialSuccess = false,
};
// Make the request
PagedEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> response = machineTypesClient.AggregatedList(request);

// Iterate over all response items, lazily performing RPCs as required
foreach (KeyValuePair<string, MachineTypesScopedList> item in response)
{
    // Do something with each item
    Console.WriteLine(item);
}

// Or iterate over pages (of server-defined size), performing one RPC per page
foreach (MachineTypeAggregatedList page in response.AsRawResponses())
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (KeyValuePair<string, MachineTypesScopedList> item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
}

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<KeyValuePair<string, MachineTypesScopedList>> singlePage = response.ReadPage(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (KeyValuePair<string, MachineTypesScopedList> item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

AggregatedList(String, String, Nullable<Int32>, CallSettings)

public virtual PagedEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> AggregatedList(string project, string pageToken = null, int? pageSize = null, CallSettings callSettings = null)

Retrieves an aggregated list of machine types.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`pageToken`	`String` The token returned from the previous request. A value of `null` or an empty string retrieves the first page.
`pageSize`	`Nullable<Int32>` The size of page to request. The response will not be larger than this, but may be smaller. A value of `null` or `0` uses a server-defined page size.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedEnumerable<MachineTypeAggregatedList, KeyValuePair<String, MachineTypesScopedList>>`	A pageable sequence of KeyValuePair<TKey,TValue> resources.

Example

// Create client
MachineTypesClient machineTypesClient = MachineTypesClient.Create();
// Initialize request argument(s)
string project = "";
// Make the request
PagedEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> response = machineTypesClient.AggregatedList(project);

// Iterate over all response items, lazily performing RPCs as required
foreach (KeyValuePair<string, MachineTypesScopedList> item in response)
{
    // Do something with each item
    Console.WriteLine(item);
}

// Or iterate over pages (of server-defined size), performing one RPC per page
foreach (MachineTypeAggregatedList page in response.AsRawResponses())
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (KeyValuePair<string, MachineTypesScopedList> item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
}

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<KeyValuePair<string, MachineTypesScopedList>> singlePage = response.ReadPage(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (KeyValuePair<string, MachineTypesScopedList> item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

AggregatedListAsync(AggregatedListMachineTypesRequest, CallSettings)

public virtual PagedAsyncEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> AggregatedListAsync(AggregatedListMachineTypesRequest request, CallSettings callSettings = null)

Retrieves an aggregated list of machine types.

Parameters
Name	Description
`request`	`AggregatedListMachineTypesRequest` The request object containing all of the parameters for the API call.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedAsyncEnumerable<MachineTypeAggregatedList, KeyValuePair<String, MachineTypesScopedList>>`	A pageable asynchronous sequence of KeyValuePair<TKey,TValue> resources.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
AggregatedListMachineTypesRequest request = new AggregatedListMachineTypesRequest
{
    OrderBy = "",
    Project = "",
    Filter = "",
    IncludeAllScopes = false,
    ReturnPartialSuccess = false,
};
// Make the request
PagedAsyncEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> response = machineTypesClient.AggregatedListAsync(request);

// Iterate over all response items, lazily performing RPCs as required
await response.ForEachAsync((KeyValuePair<string, MachineTypesScopedList> item) =>
{
    // Do something with each item
    Console.WriteLine(item);
});

// Or iterate over pages (of server-defined size), performing one RPC per page
await response.AsRawResponses().ForEachAsync((MachineTypeAggregatedList page) =>
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (KeyValuePair<string, MachineTypesScopedList> item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
});

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<KeyValuePair<string, MachineTypesScopedList>> singlePage = await response.ReadPageAsync(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (KeyValuePair<string, MachineTypesScopedList> item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

AggregatedListAsync(String, String, Nullable<Int32>, CallSettings)

public virtual PagedAsyncEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> AggregatedListAsync(string project, string pageToken = null, int? pageSize = null, CallSettings callSettings = null)

Retrieves an aggregated list of machine types.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`pageToken`	`String` The token returned from the previous request. A value of `null` or an empty string retrieves the first page.
`pageSize`	`Nullable<Int32>` The size of page to request. The response will not be larger than this, but may be smaller. A value of `null` or `0` uses a server-defined page size.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedAsyncEnumerable<MachineTypeAggregatedList, KeyValuePair<String, MachineTypesScopedList>>`	A pageable asynchronous sequence of KeyValuePair<TKey,TValue> resources.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
string project = "";
// Make the request
PagedAsyncEnumerable<MachineTypeAggregatedList, KeyValuePair<string, MachineTypesScopedList>> response = machineTypesClient.AggregatedListAsync(project);

// Iterate over all response items, lazily performing RPCs as required
await response.ForEachAsync((KeyValuePair<string, MachineTypesScopedList> item) =>
{
    // Do something with each item
    Console.WriteLine(item);
});

// Or iterate over pages (of server-defined size), performing one RPC per page
await response.AsRawResponses().ForEachAsync((MachineTypeAggregatedList page) =>
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (KeyValuePair<string, MachineTypesScopedList> item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
});

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<KeyValuePair<string, MachineTypesScopedList>> singlePage = await response.ReadPageAsync(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (KeyValuePair<string, MachineTypesScopedList> item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

Create()

public static MachineTypesClient Create()

Synchronously creates a MachineTypesClient using the default credentials, endpoint and settings. To specify custom credentials or other settings, use MachineTypesClientBuilder.

Returns
Type	Description
`MachineTypesClient`	The created MachineTypesClient.

CreateAsync(CancellationToken)

public static Task<MachineTypesClient> CreateAsync(CancellationToken cancellationToken = default(CancellationToken))

Asynchronously creates a MachineTypesClient using the default credentials, endpoint and settings. To specify custom credentials or other settings, use MachineTypesClientBuilder.

Parameter
Name	Description
`cancellationToken`	`CancellationToken` The CancellationToken to use while creating the client.

Returns
Type	Description
`Task<MachineTypesClient>`	The task representing the created MachineTypesClient.

Get(GetMachineTypeRequest, CallSettings)

public virtual MachineType Get(GetMachineTypeRequest request, CallSettings callSettings = null)

Returns the specified machine type. Gets a list of available machine types by making a list() request.

Parameters
Name	Description
`request`	`GetMachineTypeRequest` The request object containing all of the parameters for the API call.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`MachineType`	The RPC response.

Example

// Create client
MachineTypesClient machineTypesClient = MachineTypesClient.Create();
// Initialize request argument(s)
GetMachineTypeRequest request = new GetMachineTypeRequest
{
    Zone = "",
    Project = "",
    MachineType = "",
};
// Make the request
MachineType response = machineTypesClient.Get(request);

Get(String, String, String, CallSettings)

public virtual MachineType Get(string project, string zone, string machineType, CallSettings callSettings = null)

Returns the specified machine type. Gets a list of available machine types by making a list() request.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`zone`	`String` The name of the zone for this request.
`machineType`	`String` Name of the machine type to return.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`MachineType`	The RPC response.

Example

// Create client
MachineTypesClient machineTypesClient = MachineTypesClient.Create();
// Initialize request argument(s)
string project = "";
string zone = "";
string machineType = "";
// Make the request
MachineType response = machineTypesClient.Get(project, zone, machineType);

GetAsync(GetMachineTypeRequest, CallSettings)

public virtual Task<MachineType> GetAsync(GetMachineTypeRequest request, CallSettings callSettings = null)

Returns the specified machine type. Gets a list of available machine types by making a list() request.

Parameters
Name	Description
`request`	`GetMachineTypeRequest` The request object containing all of the parameters for the API call.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`Task<MachineType>`	A Task containing the RPC response.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
GetMachineTypeRequest request = new GetMachineTypeRequest
{
    Zone = "",
    Project = "",
    MachineType = "",
};
// Make the request
MachineType response = await machineTypesClient.GetAsync(request);

GetAsync(GetMachineTypeRequest, CancellationToken)

public virtual Task<MachineType> GetAsync(GetMachineTypeRequest request, CancellationToken cancellationToken)

Returns the specified machine type. Gets a list of available machine types by making a list() request.

Parameters
Name	Description
`request`	`GetMachineTypeRequest` The request object containing all of the parameters for the API call.
`cancellationToken`	`CancellationToken` A CancellationToken to use for this RPC.

Returns
Type	Description
`Task<MachineType>`	A Task containing the RPC response.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
GetMachineTypeRequest request = new GetMachineTypeRequest
{
    Zone = "",
    Project = "",
    MachineType = "",
};
// Make the request
MachineType response = await machineTypesClient.GetAsync(request);

GetAsync(String, String, String, CallSettings)

public virtual Task<MachineType> GetAsync(string project, string zone, string machineType, CallSettings callSettings = null)

Returns the specified machine type. Gets a list of available machine types by making a list() request.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`zone`	`String` The name of the zone for this request.
`machineType`	`String` Name of the machine type to return.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`Task<MachineType>`	A Task containing the RPC response.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
string project = "";
string zone = "";
string machineType = "";
// Make the request
MachineType response = await machineTypesClient.GetAsync(project, zone, machineType);

GetAsync(String, String, String, CancellationToken)

public virtual Task<MachineType> GetAsync(string project, string zone, string machineType, CancellationToken cancellationToken)

Returns the specified machine type. Gets a list of available machine types by making a list() request.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`zone`	`String` The name of the zone for this request.
`machineType`	`String` Name of the machine type to return.
`cancellationToken`	`CancellationToken` A CancellationToken to use for this RPC.

Returns
Type	Description
`Task<MachineType>`	A Task containing the RPC response.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
string project = "";
string zone = "";
string machineType = "";
// Make the request
MachineType response = await machineTypesClient.GetAsync(project, zone, machineType);

List(ListMachineTypesRequest, CallSettings)

public virtual PagedEnumerable<MachineTypeList, MachineType> List(ListMachineTypesRequest request, CallSettings callSettings = null)

Retrieves a list of machine types available to the specified project.

Parameters
Name	Description
`request`	`ListMachineTypesRequest` The request object containing all of the parameters for the API call.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedEnumerable<MachineTypeList, MachineType>`	A pageable sequence of MachineType resources.

Example

// Create client
MachineTypesClient machineTypesClient = MachineTypesClient.Create();
// Initialize request argument(s)
ListMachineTypesRequest request = new ListMachineTypesRequest
{
    Zone = "",
    OrderBy = "",
    Project = "",
    Filter = "",
    ReturnPartialSuccess = false,
};
// Make the request
PagedEnumerable<MachineTypeList, MachineType> response = machineTypesClient.List(request);

// Iterate over all response items, lazily performing RPCs as required
foreach (MachineType item in response)
{
    // Do something with each item
    Console.WriteLine(item);
}

// Or iterate over pages (of server-defined size), performing one RPC per page
foreach (MachineTypeList page in response.AsRawResponses())
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (MachineType item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
}

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<MachineType> singlePage = response.ReadPage(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (MachineType item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

List(String, String, String, Nullable<Int32>, CallSettings)

public virtual PagedEnumerable<MachineTypeList, MachineType> List(string project, string zone, string pageToken = null, int? pageSize = null, CallSettings callSettings = null)

Retrieves a list of machine types available to the specified project.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`zone`	`String` The name of the zone for this request.
`pageToken`	`String` The token returned from the previous request. A value of `null` or an empty string retrieves the first page.
`pageSize`	`Nullable<Int32>` The size of page to request. The response will not be larger than this, but may be smaller. A value of `null` or `0` uses a server-defined page size.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedEnumerable<MachineTypeList, MachineType>`	A pageable sequence of MachineType resources.

Example

// Create client
MachineTypesClient machineTypesClient = MachineTypesClient.Create();
// Initialize request argument(s)
string project = "";
string zone = "";
// Make the request
PagedEnumerable<MachineTypeList, MachineType> response = machineTypesClient.List(project, zone);

// Iterate over all response items, lazily performing RPCs as required
foreach (MachineType item in response)
{
    // Do something with each item
    Console.WriteLine(item);
}

// Or iterate over pages (of server-defined size), performing one RPC per page
foreach (MachineTypeList page in response.AsRawResponses())
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (MachineType item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
}

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<MachineType> singlePage = response.ReadPage(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (MachineType item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

ListAsync(ListMachineTypesRequest, CallSettings)

public virtual PagedAsyncEnumerable<MachineTypeList, MachineType> ListAsync(ListMachineTypesRequest request, CallSettings callSettings = null)

Retrieves a list of machine types available to the specified project.

Parameters
Name	Description
`request`	`ListMachineTypesRequest` The request object containing all of the parameters for the API call.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedAsyncEnumerable<MachineTypeList, MachineType>`	A pageable asynchronous sequence of MachineType resources.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
ListMachineTypesRequest request = new ListMachineTypesRequest
{
    Zone = "",
    OrderBy = "",
    Project = "",
    Filter = "",
    ReturnPartialSuccess = false,
};
// Make the request
PagedAsyncEnumerable<MachineTypeList, MachineType> response = machineTypesClient.ListAsync(request);

// Iterate over all response items, lazily performing RPCs as required
await response.ForEachAsync((MachineType item) =>
{
    // Do something with each item
    Console.WriteLine(item);
});

// Or iterate over pages (of server-defined size), performing one RPC per page
await response.AsRawResponses().ForEachAsync((MachineTypeList page) =>
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (MachineType item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
});

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<MachineType> singlePage = await response.ReadPageAsync(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (MachineType item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

ListAsync(String, String, String, Nullable<Int32>, CallSettings)

public virtual PagedAsyncEnumerable<MachineTypeList, MachineType> ListAsync(string project, string zone, string pageToken = null, int? pageSize = null, CallSettings callSettings = null)

Retrieves a list of machine types available to the specified project.

Parameters
Name	Description
`project`	`String` Project ID for this request.
`zone`	`String` The name of the zone for this request.
`pageToken`	`String` The token returned from the previous request. A value of `null` or an empty string retrieves the first page.
`pageSize`	`Nullable<Int32>` The size of page to request. The response will not be larger than this, but may be smaller. A value of `null` or `0` uses a server-defined page size.
`callSettings`	`CallSettings` If not null, applies overrides to this RPC call.

Returns
Type	Description
`PagedAsyncEnumerable<MachineTypeList, MachineType>`	A pageable asynchronous sequence of MachineType resources.

Example

// Create client
MachineTypesClient machineTypesClient = await MachineTypesClient.CreateAsync();
// Initialize request argument(s)
string project = "";
string zone = "";
// Make the request
PagedAsyncEnumerable<MachineTypeList, MachineType> response = machineTypesClient.ListAsync(project, zone);

// Iterate over all response items, lazily performing RPCs as required
await response.ForEachAsync((MachineType item) =>
{
    // Do something with each item
    Console.WriteLine(item);
});

// Or iterate over pages (of server-defined size), performing one RPC per page
await response.AsRawResponses().ForEachAsync((MachineTypeList page) =>
{
    // Do something with each page of items
    Console.WriteLine("A page of results:");
    foreach (MachineType item in page)
    {
        // Do something with each item
        Console.WriteLine(item);
    }
});

// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page<MachineType> singlePage = await response.ReadPageAsync(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (MachineType item in singlePage)
{
    // Do something with each item
    Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;

ShutdownDefaultChannelsAsync()

public static Task ShutdownDefaultChannelsAsync()

Shuts down any channels automatically created by Create() and CreateAsync(CancellationToken). Channels which weren't automatically created are not affected.

Returns
Type	Description
`Task`	A task representing the asynchronous shutdown operation.

Remarks

After calling this method, further calls to Create() and CreateAsync(CancellationToken) will create new channels, which could in turn be shut down by another call to this method.