| Package | Description | 
|---|---|
| org.apache.hc.core5.http.impl.bootstrap | HTTP/1.1 requester and server bootstrap. | 
| org.apache.hc.core5.http2.impl.nio.bootstrap | HTTP/2 capable requester and server bootstrap. | 
| org.apache.hc.core5.pool | Client side connection pool component APIs. | 
| org.apache.hc.core5.testing.classic | 
| Class and Description | 
|---|
| ConnPoolControl Interface to control runtime properties of a  ConnPoolsuch as
 maximum total number of connections or maximum connections per route
 allowed. | 
| ConnPoolListener Connection pool event listener. | 
| ConnPoolStats Interface to obtain connection pool statistics. | 
| ManagedConnPool | 
| PoolConcurrencyPolicy Enumeration of pool concurrency policies | 
| PoolReusePolicy Enumeration of pooled connection re-use policies | 
| PoolStats Pool statistics. | 
| Class and Description | 
|---|
| ConnPoolControl Interface to control runtime properties of a  ConnPoolsuch as
 maximum total number of connections or maximum connections per route
 allowed. | 
| ConnPoolListener Connection pool event listener. | 
| ConnPoolStats Interface to obtain connection pool statistics. | 
| ManagedConnPool | 
| PoolConcurrencyPolicy Enumeration of pool concurrency policies | 
| PoolReusePolicy Enumeration of pooled connection re-use policies | 
| Class and Description | 
|---|
| ConnPool ConnPoolrepresents a shared pool connections can be leased from
 and released back to. | 
| ConnPoolControl Interface to control runtime properties of a  ConnPoolsuch as
 maximum total number of connections or maximum connections per route
 allowed. | 
| ConnPoolListener Connection pool event listener. | 
| ConnPoolStats Interface to obtain connection pool statistics. | 
| DisposalCallback Represents a customizable disposal strategy for  ModalCloseableinstances. | 
| ManagedConnPool | 
| PoolConcurrencyPolicy Enumeration of pool concurrency policies | 
| PoolEntry Pool entry containing a pool connection object along with its route. | 
| PoolReusePolicy Enumeration of pooled connection re-use policies | 
| PoolStats Pool statistics. | 
| Class and Description | 
|---|
| ConnPoolListener Connection pool event listener. | 
| ConnPoolStats Interface to obtain connection pool statistics. | 
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