/
ClientPool.java
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/
ClientPool.java
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/**
* Copyright 2012 Preemptive Labs / Andreas Bielk (http://www.preemptive.se)
*
*************************************************************************************/
package labs.redis;
import java.io.IOException;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;
public class ClientPool
{
private final Queue<Client> queue = new ArrayBlockingQueue<Client>(100, true);
private final String host;
private final int port;
private final boolean testOnBorrow;
public ClientPool(String host, int port, boolean testOnBorrow)
{
this.host = host;
this.port = port;
this.testOnBorrow = testOnBorrow;
}
public ClientPool(boolean testOnBorrow)
{
this("localhost",6379, testOnBorrow);
}
public synchronized int size() { return queue.size(); }
public synchronized Client borrow()
throws IOException
{
final Client client = queue.poll();
if (client != null)
{
if (valid(client))
return client;
else
return borrow();
}
return new Client(SocketFactory.newSocket(host, port));
}
public synchronized void release(Client client)
{
// validate
if (client != null && valid(client)) queue.add(client);
}
private boolean valid(final Client client)
{
if (this.testOnBorrow)
{
try
{
return client.ping().get() == StatusReply.PONG;
}
catch (IOException e)
{
return false;
}
}
return client.protocol.isConnected();
}
public synchronized void flush()
throws IOException
{
Client c = null;
while((c=queue.poll()) != null)
c.close();
}
}