AbstractConnPool (Apache HttpCore 4.4.16 API)

java.lang.Object
- org.apache.http.pool.AbstractConnPool<T,C,E>

Type Parameters:
T - the route type that represents the opposite endpoint of a pooled connection.
C - the connection type.
E - the type of the pool entry containing a pooled connection.

All Implemented Interfaces:

ConnPool<T,E>, ConnPoolControl<T>

Direct Known Subclasses:

BasicConnPool
```
@Contract(threading=SAFE_CONDITIONAL)
public abstract class AbstractConnPool<T,C,E extends PoolEntry<T,C>>
extends Object
implements ConnPool<T,E>, ConnPoolControl<T>
```
Abstract synchronous (blocking) pool of connections.
Please note that this class does not maintain its own pool of execution Threads. Therefore, one must call Future.get() or Future.get(long, TimeUnit) method on the Future object returned by the lease(Object, Object, FutureCallback) method in order for the lease operation to complete.

Since:

4.2

Constructor Summary

Constructors
Constructor and Description

AbstractConnPool(ConnFactory<T,C> connFactory, int defaultMaxPerRoute, int maxTotal)

Constructors
Constructor and Description
`AbstractConnPool(ConnFactory<T,C> connFactory, int defaultMaxPerRoute, int maxTotal)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`closeExpired()` Closes expired connections and evicts them from the pool.
`void`	`closeIdle(long idletime, TimeUnit timeUnit)` Closes connections that have been idle longer than the given period of time and evicts them from the pool.
`protected abstract E`	`createEntry(T route, C conn)` Creates a new entry for the given connection with the given route.
`protected void`	`enumAvailable(PoolEntryCallback<T,C> callback)` Enumerates all available connections.
`protected void`	`enumLeased(PoolEntryCallback<T,C> callback)` Enumerates all leased connections.
`int`	`getDefaultMaxPerRoute()`
`int`	`getMaxPerRoute(T route)`
`int`	`getMaxTotal()`
`Set<T>`	`getRoutes()` Returns snapshot of all knows routes
`PoolStats`	`getStats(T route)`
`PoolStats`	`getTotalStats()`
`int`	`getValidateAfterInactivity()`
`boolean`	`isShutdown()`
`Future<E>`	`lease(T route, Object state)` Attempts to lease a connection for the given route and with the given state from the pool.
`Future<E>`	`lease(T route, Object state, FutureCallback<E> callback)` Attempts to lease a connection for the given route and with the given state from the pool.
`protected void`	`onLease(E entry)`
`protected void`	`onRelease(E entry)`
`protected void`	`onReuse(E entry)`
`void`	`release(E entry, boolean reusable)` Releases the pool entry back to the pool.
`void`	`setDefaultMaxPerRoute(int max)`
`void`	`setMaxPerRoute(T route, int max)`
`void`	`setMaxTotal(int max)`
`void`	`setValidateAfterInactivity(int ms)`
`void`	`shutdown()` Shuts down the pool.
`String`	`toString()`
`protected boolean`	`validate(E entry)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - AbstractConnPool
```
public AbstractConnPool(ConnFactory<T,C> connFactory,
                int defaultMaxPerRoute,
                int maxTotal)
```
- Method Detail
  - createEntry
```
protected abstract E createEntry(T route,
            C conn)
```
    Creates a new entry for the given connection with the given route.
  - onLease
```
protected void onLease(E entry)
```
    Since:
    
    4.3
  - onRelease
```
protected void onRelease(E entry)
```
    Since:
    
    4.3
  - onReuse
```
protected void onReuse(E entry)
```
    Since:
    
    4.4
  - validate
```
protected boolean validate(E entry)
```
    Since:
    
    4.4
  - isShutdown
```
public boolean isShutdown()
```
  - shutdown
```
public void shutdown()
              throws IOException
```
    Shuts down the pool.
    
    Throws:
    
    IOException
  - lease
```
public Future<E> lease(T route,
              Object state,
              FutureCallback<E> callback)
```
    Attempts to lease a connection for the given route and with the given state from the pool.
    Please note that this class does not maintain its own pool of execution Threads. Therefore, one must call Future.get() or Future.get(long, TimeUnit) method on the Future returned by this method in order for the lease operation to complete.
    
    Specified by:
    
    lease in interface ConnPool<T,E extends PoolEntry<T,C>>
    
    Parameters:
    route - route of the connection.
    state - arbitrary object that represents a particular state (usually a security principal or a unique token identifying the user whose credentials have been used while establishing the connection). May be null.
    callback - operation completion callback.
    
    Returns:
    future for a leased pool entry.
  - lease
```
public Future<E> lease(T route,
              Object state)
```
    Attempts to lease a connection for the given route and with the given state from the pool.
    Please note that this class does not maintain its own pool of execution Threads. Therefore, one must call Future.get() or Future.get(long, TimeUnit) method on the Future returned by this method in order for the lease operation to complete.
    
    Parameters:
    route - route of the connection.
    state - arbitrary object that represents a particular state (usually a security principal or a unique token identifying the user whose credentials have been used while establishing the connection). May be null.
    
    Returns:
    future for a leased pool entry.
  - release
```
public void release(E entry,
           boolean reusable)
```
    Description copied from interface: ConnPool
    
    Releases the pool entry back to the pool.
    
    Specified by:
    
    release in interface ConnPool<T,E extends PoolEntry<T,C>>
    
    Parameters:
    entry - pool entry leased from the pool
    reusable - flag indicating whether or not the released connection is in a consistent state and is safe for further use.
  - setMaxTotal
```
public void setMaxTotal(int max)
```
    Specified by:
    
    setMaxTotal in interface ConnPoolControl<T>
  - getMaxTotal
```
public int getMaxTotal()
```
    Specified by:
    
    getMaxTotal in interface ConnPoolControl<T>
  - setDefaultMaxPerRoute
```
public void setDefaultMaxPerRoute(int max)
```
    Specified by:
    
    setDefaultMaxPerRoute in interface ConnPoolControl<T>
  - getDefaultMaxPerRoute
```
public int getDefaultMaxPerRoute()
```
    Specified by:
    
    getDefaultMaxPerRoute in interface ConnPoolControl<T>
  - setMaxPerRoute
```
public void setMaxPerRoute(T route,
                  int max)
```
    Specified by:
    
    setMaxPerRoute in interface ConnPoolControl<T>
  - getMaxPerRoute
```
public int getMaxPerRoute(T route)
```
    Specified by:
    
    getMaxPerRoute in interface ConnPoolControl<T>
  - getTotalStats
```
public PoolStats getTotalStats()
```
    Specified by:
    
    getTotalStats in interface ConnPoolControl<T>
  - getStats
```
public PoolStats getStats(T route)
```
    Specified by:
    
    getStats in interface ConnPoolControl<T>
  - getRoutes
```
public Set<T> getRoutes()
```
    Returns snapshot of all knows routes
    
    Returns:
    the set of routes
    Since:
    
    4.4
  - enumAvailable
```
protected void enumAvailable(PoolEntryCallback<T,C> callback)
```
    Enumerates all available connections.
    
    Since:
    
    4.3
  - enumLeased
```
protected void enumLeased(PoolEntryCallback<T,C> callback)
```
    Enumerates all leased connections.
    
    Since:
    
    4.3
  - closeIdle
```
public void closeIdle(long idletime,
             TimeUnit timeUnit)
```
    Closes connections that have been idle longer than the given period of time and evicts them from the pool.
    
    Parameters:
    idletime - maximum idle time.
    timeUnit - time unit.
  - closeExpired
```
public void closeExpired()
```
    Closes expired connections and evicts them from the pool.
  - getValidateAfterInactivity
```
public int getValidateAfterInactivity()
```
    Returns:
    the number of milliseconds
    Since:
    
    4.4
  - setValidateAfterInactivity
```
public void setValidateAfterInactivity(int ms)
```
    Parameters:
    ms - the number of milliseconds
    Since:
    
    4.4
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class AbstractConnPool<T,C,E extends PoolEntry<T,C>>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AbstractConnPool

Method Detail

createEntry

onLease

onRelease

onReuse

validate

isShutdown

shutdown

lease

lease

release

setMaxTotal

getMaxTotal

setDefaultMaxPerRoute

getDefaultMaxPerRoute

setMaxPerRoute

getMaxPerRoute

getTotalStats

getStats

getRoutes

enumAvailable

enumLeased

closeIdle

closeExpired

getValidateAfterInactivity

setValidateAfterInactivity

toString