This resource represents a long-running operation that is the result of a network API call.
| JSON representation | 
|---|
| { "name" : string , "metadata" : { "@type" : string , field1 : ... , ... } , "done" : boolean , // Union field | 
name 
 string 
The server-assigned name, which is only unique within the same service that originally returns it. If you use the default HTTP mapping, the name 
should be a resource name ending with operations/{uniqueId} 
.
metadata 
 object 
Service-specific metadata associated with the operation. It typically contains progress information and common metadata such as create time. Some services might not provide such metadata. Any method that returns a long-running operation should document the metadata type, if any.
An object containing fields of an arbitrary type. An additional field "@type" 
contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" } 
.
done 
 boolean 
If the value is false 
, it means the operation is still in progress. If true 
, the operation is completed, and either error 
or response 
is available.
result 
. The operation result, which can be either an error 
or a valid response 
. If done 
== false 
, neither error 
nor response 
is set. If done 
== true 
, exactly one of error 
or response 
can be set. Some services might not provide the result. result 
can be only one of the following:error 
 object (  
 Status 
 
)
The error result of the operation in case of failure or cancellation.
response 
 object 
The normal, successful response of the operation. If the original method returns no data on success, such as Delete 
, the response is google.protobuf.Empty 
. If the original method is standard Get 
/ Create 
/ Update 
, the response should be the resource. For other methods, the response should have the type XxxResponse 
, where Xxx 
is the original method name. For example, if the original method name is TakeSnapshot() 
, the inferred response type is TakeSnapshotResponse 
.
An object containing fields of an arbitrary type. An additional field "@type" 
contains a URI identifying the type. Example: { "id": 1234, "@type": "types.example.com/standard/id" } 
.
Status
The Status 
type defines a logical error model that is suitable for different programming environments, including REST APIs and RPC APIs. It is used by gRPC 
. Each Status 
message contains three pieces of data: error code, error message, and error details.
You can find out more about this error model and how to work with it in the API Design Guide .
| JSON representation | 
|---|
| { "code" : integer , "message" : string , "details" : [ { "@type" : string , field1 : ... , ... } ] } | 
| Fields | |
|---|---|
| code |   The status code, which should be an enum value of  | 
| message |   A developer-facing error message, which should be in English. Any user-facing error message should be localized and sent in the  | 
| details[] |   A list of messages that carry the error details. There is a common set of message types for APIs to use. An object containing fields of an arbitrary type. An additional field  | 

