Class w3c.jigsaw.http.ClientPool
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Class w3c.jigsaw.http.ClientPool
java.lang.Object
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+----w3c.jigsaw.http.ClientPool
- public class ClientPool
- extends Object
- implements PropertyMonitoring
The client pool is a kind of client factory.
Each time the server gets a new connection, it calls the client pool
to bound a client object (newly created or spared) to handle it.
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AVG_DEAD
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AVG_HIGH
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AVG_LIGHT
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AVG_NORMAL
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MAXSPARE_FREE
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MAXSPARE_FREE_P
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MAXSPARE_IDLE
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MAXSPARE_IDLE_P
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MAXTHREADS
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MAXTHREADS_P
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MINSPARE_FREE
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MINSPARE_FREE_P
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MINSPARE_IDLE
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addClient(boolean)
- Create a new client for this pool.
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clientConnectionFinished(Client)
- Notify that this client has finished with its connection.
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clientFinished(Client)
- Notify that this client has been killed.
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deleteClient(ClientState)
- Remove this client state from the glohbal client list.
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handleConnection(Socket)
- Handle the given connection.
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killClients(boolean)
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killSomeClients()
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notifyIdle(Client)
- The client notifies the pool that it enters idle state.
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notifyUse(Client)
- The client notifies the pool that is has been activated.
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propertyChanged(String)
- Some property have changed, update our setting.
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shutdown(boolean)
- Shutdown the client pool.
MINSPARE_FREE_P
public final static String MINSPARE_FREE_P
MAXSPARE_FREE_P
public final static String MAXSPARE_FREE_P
MAXSPARE_IDLE_P
public final static String MAXSPARE_IDLE_P
MAXTHREADS_P
public final static String MAXTHREADS_P
MINSPARE_FREE
public final static int MINSPARE_FREE
MAXSPARE_FREE
public final static int MAXSPARE_FREE
MINSPARE_IDLE
public final static int MINSPARE_IDLE
MAXSPARE_IDLE
public final static int MAXSPARE_IDLE
MAXTHREADS
public final static int MAXTHREADS
AVG_LIGHT
public final static int AVG_LIGHT
AVG_NORMAL
public final static int AVG_NORMAL
AVG_HIGH
public final static int AVG_HIGH
AVG_DEAD
public final static int AVG_DEAD
propertyChanged
public boolean propertyChanged(String name)
- Some property have changed, update our setting.
- Parameters:
- name - The name of the property that has changed.
- Returns:
- A boolean, true if we updated ourself
successfully.
deleteClient
protected synchronized void deleteClient(ClientState cs)
- Remove this client state from the glohbal client list.
- Parameters:
- cs - The client state to remove from the list.
addClient
protected synchronized ClientState addClient(boolean free)
- Create a new client for this pool.
- Parameters:
- free - A boolean, if true the client is inserted
straight into the free list, otherwise, it is not plugged into any
list.
- Returns:
- A ClientState instance, if creation of a new client was allowed,
null if no more clients could be created.
clientConnectionFinished
protected boolean clientConnectionFinished(Client client)
- Notify that this client has finished with its connection.
If the pool wants the client to be freed (because it has too many of
them), it makes the client kill itself (which will trigger a call to
the clientFinished method, were enventual cleanup is performed).
- Parameters:
- client - The client that is done with its connection.
clientFinished
protected void clientFinished(Client client)
- Notify that this client has been killed.
- Parameters:
- client - The client that has terminate.
notifyUse
protected void notifyUse(Client client)
- The client notifies the pool that is has been activated.
The client state object is updated to unmark the client as idle.
This method needs not be synchronized, as it affect only the client
state, not the client list.
- Parameters:
- client - The activated client.
notifyIdle
protected boolean notifyIdle(Client client)
- The client notifies the pool that it enters idle state.
This method needs not be synchronized, as it affect only the client
state, not the client list.
- Parameters:
- client - The client that is going to be idle.
killSomeClients
protected void killSomeClients()
handleConnection
public void handleConnection(Socket socket)
- Handle the given connection.
Find a free client, bind it to the given socket, and run it. If we
have reached our maximum allowed number of clients, kill some
connections.
A client enters the LRU list (and become a candidate for kill) only
after it has handle one request (or if some timeout expires). This is
performed by the first call to notifyUse
which will
silently insert the client into the LRU if it was not there already.
This client pool does a lot of nice thinigs, but could probably be
implemented in a much better way (while keeping the features it has).
Contention arond the pool is probably concern number 1 of performances.
- Parameters:
- socket - The connection to handle.
killClients
protected synchronized void killClients(boolean force)
shutdown
public void shutdown(boolean force)
- Shutdown the client pool.
If force is true, kill all running clients right
now, otherwise, wait for them to terminate gracefully, and return
when done.
- Parameters:
- force - Should we interrupt running clients.
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