Trait LogQueryInterceptor 

pub trait LogQueryInterceptor {
    type Error: ErrorExt;

    // Provided methods
    fn pre_query(
        &self,
        _query: &LogQuery,
        _query_ctx: QueryContextRef,
    ) -> Result<(), Self::Error> { ... }
    fn post_query(
        &self,
        output: Output,
        _query_ctx: QueryContextRef,
    ) -> Result<Output, Self::Error> { ... }
}

LogQueryInterceptor can track life cycle of a log query request and customize or abort its execution at given point.

Required Associated Types

type Error: ErrorExt

Provided Methods

fn pre_query( &self, _query: &LogQuery, _query_ctx: QueryContextRef, ) -> Result<(), Self::Error>

Called before query is actually executed.

fn post_query( &self, output: Output, _query_ctx: QueryContextRef, ) -> Result<Output, Self::Error>

Called after execution finished. The implementation can modify the output if needed.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<E> LogQueryInterceptor for Option<&LogQueryInterceptorRef<E>>

where E: ErrorExt,

type Error = E

fn pre_query( &self, query: &LogQuery, query_ctx: QueryContextRef, ) -> Result<(), Self::Error>

fn post_query( &self, output: Output, query_ctx: QueryContextRef, ) -> Result<Output, Self::Error>

Implementors