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

Implementation of a MetricSink that buffers metrics before sending them to a Unix socket.

Metrics are line buffered, meaning that a trailing “\n” is added after each metric written to this sink. When the buffer is sufficiently full and a write is attempted, the contents of the buffer are flushed to a Unix socket and then the metric is written to the buffer. The buffer is also flushed when this sink is destroyed.

The default size of the buffer is 512 bytes. This is to be consistent with the default for the BufferedUdpMetricSink. The buffer size can be customized using the with_capacity method to create the sink if desired.

If a metric larger than the buffer is emitted, it will be written directly to the underlying Unix socket, bypassing the buffer.

Note that since metrics are buffered until a certain size is reached, it’s possible that they may sit in the buffer for a while for applications that do not emit metrics frequently or at a high volume. For these low- throughput use cases, it may make more sense to use the UnixMetricSink since it sends metrics immediately with no buffering.

Also note that unlike the UDP sinks, if there is no receiving socket at the path specified or nothing listening at the path, an error will be returned when metrics are emitted (though this may not happen on every write due to buffering).

Implementations

Construct a new BufferedUnixMetricSink instance with a default buffer size of 512 bytes.

The socket does not need to be bound (i.e. UnixDatagram::unbound() is fine) but should have any desired configuration already applied (blocking vs non-blocking, timeouts, etc.).

Writes to this sink are automatically suffixed with a Unix newline (‘\n’) by the sink and stored in a 512 byte buffer until the buffer is full or this sink is destroyed, at which point the buffer will be flushed.

Example
use std::os::unix::net::UnixDatagram;
use cadence::BufferedUnixMetricSink;

let socket = UnixDatagram::unbound().unwrap();
let sink = BufferedUnixMetricSink::from("/run/statsd.sock", socket);

Construct a new BufferedUnixMetricSink instance with a custom buffer size.

The socket does not need to be bound (i.e. UnixDatagram::unbound() is fine) but should have with any desired configuration already applied (blocking vs non-blocking, timeouts, etc.).

Writes to this sink are automatically suffixed with a Unix newline (‘\n’) by the sink and stored in a buffer until the buffer is full or this sink is destroyed, at which point the buffer will be flushed.

Example
use std::os::unix::net::UnixDatagram;
use cadence::BufferedUnixMetricSink;

let socket = UnixDatagram::unbound().unwrap();
let sink = BufferedUnixMetricSink::with_capacity("/run/statsd.sock", socket, 1432);

Trait Implementations

Formats the value using the given formatter. Read more

Send the Statsd metric using this sink and return the number of bytes written or an I/O error. Read more

Flush any currently buffered metrics to the underlying backend, returning an I/O error if they could not be written for some reason. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.