Module layers

Modules

• lru_cache 🔒
• observe
  OpenDAL Observability Layer
• prometheus 🔒

Structs

• CapabilityCheckLayer
  Add an extra capability check layer for every operation
• ConcurrentLimitLayer
  Add concurrent request limit.
• ImmutableIndexLayer
  Add an immutable in-memory index for underlying storage services.
• LoggingLayer
  Add log for every operation.
• LruCacheAccess
• LruCacheLayer
  An opendal layer with local LRU file cache supporting.
• PrometheusLayer
  Add prometheus for every operation.
• PrometheusLayerBuilder
  PrometheusLayerBuilder is a config builder to build a PrometheusLayer.
• RetryLayer
  Add retry for temporary failed operations.
• TimeoutLayer
  Add timeout for every operation to avoid slow or unexpected hang operations.
• TracingLayer
  Add tracing for every operation.

Traits

• LoggingInterceptor
  LoggingInterceptor is used to intercept the log.
• RetryInterceptor
  RetryInterceptor is used to intercept while retry happened.

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>/...