Trait DataSource

Source

pub trait DataSource {
    // Required methods
    fn poll(&mut self) -> Result<Snapshot, SourceError>;
    fn signal_process(
        &mut self,
        pid: u32,
        signal: ProcessSignal,
    ) -> Result<(), SourceError>;

    // Provided methods
    fn set_interval(&mut self, _interval: Duration) { ... }
    fn set_process_limit(&mut self, _limit: Option<usize>) { ... }
}

Expand description

A producer of snapshots, local or remote.

Required Methods§

Source

fn poll(&mut self) -> Result<Snapshot, SourceError>

Takes a new measurement.

Rates (CPU %, throughput, power) cover the time since the previous call, so callers should poll at a steady interval of at least MIN_POLL_INTERVAL.

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fn signal_process( &mut self, pid: u32, signal: ProcessSignal, ) -> Result<(), SourceError>

Sends signal to process pid on the monitored host, with the privileges of the user the source runs as.

Provided Methods§

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fn set_interval(&mut self, _interval: Duration)

Tells the source how often it will be polled. Remote sources forward this to the agent, which samples on its own schedule; local sources need nothing.

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