pub struct DecompressionAndMetricsLayer;Expand description
A layer for decompressing Tonic request payloads and emitting telemetry for the payload sizes.
In some cases, we configure tonic to use compression on requests to save CPU and throughput when sending those
large requests. In the case of Vector-to-Vector communication, this means the Vector v2 source may deal with
compressed requests. The code already transparently handles decompression, but as part of our component
specification, we have specific goals around what event representations we pay attention to.
In the case of tracking bytes sent/received, we always want to track the number of bytes received after
decompression to faithfully represent the amount of data being processed by Vector. This poses a problem with the
out-of-the-box tonic codegen as there is no hook whatsoever to inspect the raw request payload (after
decompression, if it was compressed at all) prior to the payload being decoded as a Protocol Buffers payload.
This layer wraps the incoming body in our own body type, which allows us to do two things: decompress the payload before it enters the decoding phase, and emit metrics based on the decompressed payload.
Since we can see the decompressed bytes, and also know if the underlying service responded successfully – i.e. the request was valid, and was processed – we can now report the number of bytes (after decompression) that were received and processed correctly.
The only supported compression scheme is gzip, which is also the only supported compression scheme in tonic itself.
Trait Implementations§
source§impl Clone for DecompressionAndMetricsLayer
impl Clone for DecompressionAndMetricsLayer
source§fn clone(&self) -> DecompressionAndMetricsLayer
fn clone(&self) -> DecompressionAndMetricsLayer
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moresource§impl Default for DecompressionAndMetricsLayer
impl Default for DecompressionAndMetricsLayer
source§fn default() -> DecompressionAndMetricsLayer
fn default() -> DecompressionAndMetricsLayer
Returns the “default value” for a type. Read more
source§impl<S> Layer<S> for DecompressionAndMetricsLayer
impl<S> Layer<S> for DecompressionAndMetricsLayer
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impl Freeze for DecompressionAndMetricsLayer
impl RefUnwindSafe for DecompressionAndMetricsLayer
impl Send for DecompressionAndMetricsLayer
impl Sync for DecompressionAndMetricsLayer
impl Unpin for DecompressionAndMetricsLayer
impl UnwindSafe for DecompressionAndMetricsLayer
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