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OperationContext

opendal

Struct OperationContext 

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pub struct OperationContext { /* private fields */ }
Expand description

Composed resources passed from operator to services and layers.

Operator keeps a base OperationContext and replays its layers to produce the composed context passed to every service operation. The context carries runtime resources supplied by the operator stack, not caller intent for a specific operation. Operation-specific inputs live in Op* argument structs such as OpRead and OpWrite.

Service implementations should read HTTP transport, executor, and similar resources from the OperationContext they receive at the operation boundary. They should not cache those resources in the service created by Builder::build, because later layers or Operator::with_context can replace them for a derived operator.

Layers that replace the HTTP transport or executor must keep forwarding requests or tasks to the previous value. Otherwise, composed features such as retry, timeout, tracing, and metrics can be bypassed.

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impl OperationContext

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pub fn new() -> OperationContext

Create a new operation context with default runtime resources.

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pub fn from_parts( http_transport: HttpTransporter, executor: Executor, ) -> OperationContext

Create a new operation context from composed runtime resources.

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pub fn with_http_transport( &self, http_transport: HttpTransporter, ) -> OperationContext

Return a copy of this context with a different HTTP transport.

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pub fn with_executor(&self, executor: Executor) -> OperationContext

Return a copy of this context with a different executor.

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pub fn into_parts(self) -> (HttpTransporter, Executor)

Split into composed resources.

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pub fn http_transport(&self) -> &HttpTransporter

Get the composed HTTP transport.

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pub fn executor(&self) -> &Executor

Get the composed executor.

Trait Implementations§

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impl Clone for OperationContext

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fn clone(&self) -> OperationContext

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for OperationContext

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Default for OperationContext

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fn default() -> OperationContext

Returns the “default value” for a type. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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