Module pool 

Available on crate feature net only.

Modules

metricsopentelemetry

multiplex

Multiplexing connection pool.

Structs

ActiveSlot

Active slot is able to actively use a connection to make requests. They are used to track ‘active’ connections inside the pool

BasicConnId

Connection identity produced by BasicConnIdentifier.

BasicConnIdentifier

Basic connection-pool identifier derived from connection input.

ConnectionAdmission

Resource admission published on an established connection’s extensions.

ConnectionAdmissionLease

A transport’s resources reserved for one pool handout.

ConnectionReuse

Reuse requirements published by a connector on its established connection.

LeasedConnection

LeasedConnection is a connection that is temporarily leased from a pool

LruDropPool

Connection pool that uses LRU to evict connections

MultiplexPool

Connection pool that multiplexes concurrent users over shared connections.

MultiplexSlot

The share of a MultiplexPool’s limits a new connection takes: the create permit of MultiplexPool::get_conn. The connection keeps it while stored.

MultiplexedConnection

A cheap handle to a shared connection in a MultiplexPool.

NoPool

Connection pool that doesn’t store connections and has no limits.

PoolSlot

Pool slot is needed to add a connection to the pool. Poolslots have a one to one mapping to connections inside the pool, and are used to track the ‘total’ connections inside the pool

PooledConnector

PooledConnectorLayer

ReuseKey

Exact identity of the reuse requirements of a connection or a request.

Enums

ConnectionResult

Result returned by a successful call to Pool::get_conn

MuxSelection

Strategy used to pick a connection among several that share the same ConnID and still have stream capacity.

ReuseStrategy

SaturationPolicy

What a MultiplexPool at a connection limit does for a checkout that needs a new connection: wait, or replace an idle connection, of its own id at the id’s limit and of any id at the total one.

Traits

ConnID

ConnID is used to identify a connection in a connection pool. These IDs are not unique and multiple connections can have the same ID. IDs are used to filter which connections can be used for a specific input in a way that is independent of what an input is.

ConnectionAdmissionPolicy

Transport resources required before a pooled connection can be handed out.

ConnectionReusePolicy

Connection-owned requirements for reusing an established transport.

Pool

Pool implements the storage part of a connection pool. This storage also decides which connection it returns for a given ID or when the caller asks to remove one, this results in the storage deciding which mode we use for connection reuse and dropping (eg FIFO for reuse and LRU for dropping conn when pool is full)

ReqToConnID

ReqToConnID is used to convert a Input to a connection ID. These IDs are not unique and multiple connections can have the same ID. IDs are used to filter which connections can be used for a specific input in a way that is independent of what an input is.