LocalSystemParamsManager

risingwave_common::system_param::local_manager

Struct LocalSystemParamsManager 

Source 
pub struct LocalSystemParamsManager {
    params: SystemParamsReaderRef,
    tx: Sender<SystemParamsReaderRef>,
}
Expand description

The system parameter manager on worker nodes. It provides two methods for other components to read the latest system parameters:

  • get_params returns a reference to the latest parameters that is atomically updated.
  • watch_params returns a channel on which calling recv will get the latest parameters. Compared with get_params, the caller can be explicitly notified of parameter change.

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§params: SystemParamsReaderRef

The latest parameters.

§tx: Sender<SystemParamsReaderRef>

Sender of the latest parameters.

Implementations§

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impl LocalSystemParamsManager

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pub fn new(initial_params: SystemParamsReader) -> Self

Create a new instance of LocalSystemParamsManager and spawn a task to run the common handler.

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pub fn for_test() -> Self

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fn new_inner(initial_params: SystemParamsReader) -> Self

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pub fn get_params(&self) -> SystemParamsReaderRef

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pub fn try_set_params(&self, new_params: SystemParams)

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pub fn watch_params(&self) -> Receiver<SystemParamsReaderRef>

Trait Implementations§

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impl Debug for LocalSystemParamsManager

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

Formats the value using the given formatter. Read more

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