Module layers 

Modules

mock

prometheus 🔒

Structs

CapabilityOverrideLayer

Layer for overriding an operator’s effective capability.

ConcurrentLimitLayer

ConcurrentLimitLayer controls how many concurrent requests OpenDAL can send to a storage service.

DefaultLoggingInterceptor

The DefaultLoggingInterceptor will log the message by the standard logging macro.

DefaultRetryInterceptor

The DefaultRetryInterceptor logs each retry error at warn level.

LoggingLayer

LoggingLayer records every operation with log.

PrometheusLayer

PrometheusLayer records OpenDAL operation and HTTP fetch metrics with prometheus.

PrometheusLayerBuilder

PrometheusLayerBuilder is a config builder to build a PrometheusLayer.

RetryEvent

Context passed to RetryInterceptor before each retry sleep.

RetryLayer

RetryLayer retries temporarily failed operations.

SimulateLayer

Simulate missing capabilities for backends in a configurable way.

TimeoutLayer

TimeoutLayer adds deadlines to operations so slow or stalled work cannot hang indefinitely.

TracingLayer

TracingLayer traces every operation with tracing.

Traits

ConcurrentLimitSemaphore

ConcurrentLimitSemaphore abstracts a semaphore-like concurrency primitive that yields an owned permit released on drop.

LoggingInterceptor

LoggingInterceptor customizes log emission.

RetryInterceptor

RetryInterceptor observes retry attempts before the retry sleep.

Functions

build_prometheus_metrics_layer

This logical tries to extract parent path from the object storage operation the function also relies on assumption that the region path is built from pattern <data|index>/catalog/schema/table_id/... OR greptimedb/object_cache/<read|write>/...