KeepAliveCache

extends ConcurrentHashMap<K, V>
implements Runnable

java.lang.Object
↳	java.util.AbstractMap<K, V>
	↳	java.util.concurrent.ConcurrentHashMap<K, V>
		↳	sun.net.www.http.KeepAliveCache

Class Overview

A class that implements a cache of idle Http connections for keep-alive

Summary

Public Constructors
	KeepAliveCache() Constructor

Public Methods
synchronized Object	get(URL url, Object obj) Check to see if this URL has a cached HttpClient
synchronized void	put(URL url, Object obj, HttpClient http) Register this URL and HttpClient (that supports keep-alive) with the cache
synchronized void	remove(HttpClient h, Object obj)
void	run() When an object implementing interface `Runnable` is used to create a thread, starting the thread causes the object's `run` method to be called in that separately executing thread.

[Expand]

Inherited Methods

From class java.util.concurrent.ConcurrentHashMap

void	clear() Removes all of the mappings from this map.
boolean	contains(Object value) Legacy method testing if some key maps into the specified value in this table.
boolean	containsKey(Object key) Tests if the specified object is a key in this table.
boolean	containsValue(Object value) Returns `true` if this map maps one or more keys to the specified value.
Enumeration<V>	elements() Returns an enumeration of the values in this table.
Set<Entry<K, V>>	entrySet() Returns a `Set` view of the mappings contained in this map.
V	get(Object key) Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key.
boolean	isEmpty() Returns `true` if this map contains no key-value mappings.
Set<K>	keySet() Returns a `Set` view of the keys contained in this map.
Enumeration<K>	keys() Returns an enumeration of the keys in this table.
V	put(K key, V value) Maps the specified key to the specified value in this table.
void	putAll(Map<? extends K, ? extends V> m) Copies all of the mappings from the specified map to this one.
V	putIfAbsent(K key, V value) If the specified key is not already associated with a value, associate it with the given value.
boolean	remove(Object key, Object value) Removes the entry for a key only if currently mapped to a given value.
V	remove(Object key) Removes the key (and its corresponding value) from this map.
V	replace(K key, V value) Replaces the entry for a key only if currently mapped to some value.
boolean	replace(K key, V oldValue, V newValue) Replaces the entry for a key only if currently mapped to a given value.
int	size() Returns the number of key-value mappings in this map.
Collection<V>	values() Returns a `Collection` view of the values contained in this map.

From class java.util.AbstractMap

void	clear() Removes all of the mappings from this map (optional operation). This implementation calls `entrySet().clear()`.
Object	clone() Returns a shallow copy of this `AbstractMap` instance: the keys and values themselves are not cloned.
boolean	containsKey(Object key) Returns `true` if this map contains a mapping for the specified key. This implementation iterates over `entrySet()` searching for an entry with the specified key.
boolean	containsValue(Object value) Returns `true` if this map maps one or more keys to the specified value. This implementation iterates over `entrySet()` searching for an entry with the specified value.
abstract Set<Entry<K, V>>	entrySet() Returns a `Set` view of the mappings contained in this map.
boolean	equals(Object o) Compares the specified object with this map for equality.
V	get(Object key) Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key. This implementation iterates over `entrySet()` searching for an entry with the specified key.
int	hashCode() Returns the hash code value for this map.
boolean	isEmpty() Returns `true` if this map contains no key-value mappings. This implementation returns `size() == 0`.
Set<K>	keySet() Returns a `Set` view of the keys contained in this map. This implementation returns a set that subclasses `AbstractSet`.
V	put(K key, V value) Associates the specified value with the specified key in this map (optional operation). This implementation always throws an `UnsupportedOperationException`.
void	putAll(Map<? extends K, ? extends V> m) Copies all of the mappings from the specified map to this map (optional operation). This implementation iterates over the specified map's `entrySet()` collection, and calls this map's `put` operation once for each entry returned by the iteration.
V	remove(Object key) Removes the mapping for a key from this map if it is present (optional operation). This implementation iterates over `entrySet()` searching for an entry with the specified key.
int	size() Returns the number of key-value mappings in this map. This implementation returns `entrySet().size()`.
String	toString() Returns a string representation of this map.
Collection<V>	values() Returns a `Collection` view of the values contained in this map. This implementation returns a collection that subclasses `AbstractCollection`.

From class java.lang.Object

Object	clone() Creates and returns a copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
final Class<?>	getClass() Returns the runtime class of this `Object`.
int	hashCode() Returns a hash code value for the object.
final void	notify() Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll() Wakes up all threads that are waiting on this object's monitor.
String	toString() Returns a string representation of the object.
final void	wait() Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
final void	wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
final void	wait(long timeout) Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.

From interface java.lang.Runnable

From interface java.util.Map

abstract void	clear() Removes all of the mappings from this map (optional operation).
abstract boolean	containsKey(Object key) Returns `true` if this map contains a mapping for the specified key.
abstract boolean	containsValue(Object value) Returns `true` if this map maps one or more keys to the specified value.
abstract Set<Entry<K, V>>	entrySet() Returns a `Set` view of the mappings contained in this map.
abstract boolean	equals(Object o) Compares the specified object with this map for equality.
abstract V	get(Object key) Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key.
abstract int	hashCode() Returns the hash code value for this map.
abstract boolean	isEmpty() Returns `true` if this map contains no key-value mappings.
abstract Set<K>	keySet() Returns a `Set` view of the keys contained in this map.
abstract V	put(K key, V value) Associates the specified value with the specified key in this map (optional operation).
abstract void	putAll(Map<? extends K, ? extends V> m) Copies all of the mappings from the specified map to this map (optional operation).
abstract V	remove(Object key) Removes the mapping for a key from this map if it is present (optional operation).
abstract int	size() Returns the number of key-value mappings in this map.
abstract Collection<V>	values() Returns a `Collection` view of the values contained in this map.

From interface java.util.concurrent.ConcurrentMap

Public Constructors

public KeepAliveCache ()

Constructor

Public Methods

public synchronized Object get (URL url, Object obj)

Check to see if this URL has a cached HttpClient

public synchronized void put (URL url, Object obj, HttpClient http)

Register this URL and HttpClient (that supports keep-alive) with the cache

Parameters

url	The URL contains info about the host and port
http	The HttpClient to be cached

public synchronized void remove (HttpClient h, Object obj)

public void run ()

When an object implementing interface Runnable is used to create a thread, starting the thread causes the object's run method to be called in that separately executing thread.

The general contract of the method run is that it may take any action whatsoever.

Interfaces

Classes