Library Tour

The @azure-tools/typespec-azure-core library defines the following artifacts:

• TypeSpec Azure Core Library
  • Models
  • Operations
  • Decorators
  • API

Models

The @azure-tools/typespec-azure-core library defines the following models:

Model	Notes
Page<TResource>	Model for a paged resource. <TResource> is the model description of the item.
PagedResultMetadata	Contains the metadata associated with a Page<TResource>.
RequestParameter<T>	For long-running operations, identifies that a continuation operation request parameter is pulled from the original request. <T> is the property name on the original request.
ResponseProperty<T>	For long-running operations, identifies that a continuation operation request parameter is pulled from the response of the previous request. <T> is the property name on the previous response.
LongRunningStates	Identifies the long-running states associated with a long-running operation.
OperationLinkMetadata	Contains the metadata associated with an operation link.

Operations

The @azure-tools/typespec-azure-core library defines these standard operation templates as basic building blocks that you can expose. You can use is to compose the operations to meet the exact needs of your APIs.

For all of these operation templates, TResource is the resource model and TCustom allows customization of the operation parameters or response. TCustom, if provided, must extend the Azure.Core.Foundations.CustomizationFields model, which looks like:

/** The expected shape of model types passed to the TCustom parameter of operation signatures. */
model CustomizationFields {
  /** An object containing custom parameters that will be included in the operation. */
  parameters?: object;

  /** An object containing custom properties that will be included in the response. */
  response?: object;
}

Operation	Notes
ResourceCreateOrUpdate<TResource, TCustom>	Resource PATCH operation.
ResourceCreateOrReplace<TResource, TCustom>	Resource PUT operation.
ResourceCreateWithServiceProvidedName<TResource, TCustom>	Resource POST operation.
ResourceRead<TResource, TCustom>	Resource GET operation.
ResourceDelete<TResource, TCustom>	Resource DELETE operation.
ResourceList<TResource, TCustom>	Resource LIST operation with server-driven paging.
NonPagedResourceList<TResource, TCustom>	Resource LIST operation without paging.
ResourceAction<TResource, TParams, TResponse>	Perform a custom action on a specific resource.
ResourceCollectionAction<TResource, TParams, TResponse>	Perform a custom action on a collection of resources.
LongRunningResourceCreateOrReplace<TResource, TCustom>	Long-running resource PUT operation.
LongRunningResourceCreateOrUpdate<TResource, TCustom>	Long-running resource PATCH operation.
LongRunningResourceCreateWithServiceProvidedName<TResource, TCustom>	Long-running resource POST operation.
LongRunningResourceDelete<TResource, TCustom>	Long-running resource DELETE operation.

Decorators

The @azure-tools/typespec-azure-core library defines the following decorators:

Declarator	Scope	Usage
@pagedResult	models	indicates model describes a paged result.
@items	model properties	indicates model property that stores the items within a paged result.
@nextLink	model properties	indicates model property that contains the continuation information for the next page.
@nextPageOperation	operations	indicates operation that will be called for subsequent page requests.
@lroStatus	enums and model properties	indicates model or model property that represents long-running operation status.
@lroSucceeded	enum members	indicates enum member that corresponds to the long-running operation succeeded status.
@lroCanceled	enum members	indicates enum member that corresponds to the long-running operation canceled status.
@lroFailed	enum members	indicates enum member that corresponds to the long-running operation failed status.
@pollingLocation	model properties	indicates model property that contains the location to poll for operation state.
@finalLocation	model properties	indicates model property that contains the final location for the operation result.
@operationLink	operations	indicates operation that is linked to the decorated operation by virtue of its linkType.
@pollingOperation	operations	indicates an operation is a polling operation for a long-running operation.
@finalOperation	operations	indicates an operation is the final operation for a long-running operation.

API

The @azure-tools/typespec-azure-core library defines the following API functions that emitter authors can use for development:

Name	Entity	Returns	Description
getPagedResult	models and operations	PagedResultMetadata?	Returns the PagedResultMetadata if associated with a model or operation return type.
getItems	model properties	boolean	Returns true if the model property is annotated with @items.
getNextLink	model properties	boolean	Returns true if the model property is annotated with @nextLink.
getLongRunningStates	enums, models and model properties	LongRunningStates?	Returns the LongRunningStates associated with an entity.
isLroSucceededState	enum members	boolean	Returns true if the enum member represents a “succeeded” state.
isLroCanceledState	enum members	boolean	Returns true if the enum member represents a “canceled” state.
isLroFailedState	enum members	boolean	Returns true if the enum member represents a “failed” state.
isPollingLocation	model properties	boolean	Returns true if the model property is annotated with @pollingLocation.
isFinalLocation	model properties	boolean	Returns true if the model property is annotated with @finalLocation.
getOperationLink	operations	OperationLinkMetadata?	Returns the OperationLinkMetadata for an operation with a specific linkType.
getOperationLinks	operations	Map<string, OperationLinkMetadata>?	Returns a Map of OperationLinkMetadata objects for an Operation where the key is the linkType.