com.emc.mongoose.storage.driver.net.base.pool

Class BasicMultiNodeConnPool

java.lang.Object

com.emc.mongoose.storage.driver.net.base.pool.BasicMultiNodeConnPool

All Implemented Interfaces:

NonBlockingConnPool, java.io.Closeable, java.lang.AutoCloseable

public class BasicMultiNodeConnPool
extends java.lang.Object
implements NonBlockingConnPool

Created by andrey on 23.01.17. The simple multi-endpoint connection pool which is throttled externally by providing the semaphore. The provided semaphore limits the count of the simultaneously used connections. Based on netty.

Field Summary

Fields inherited from interface com.emc.mongoose.storage.driver.net.base.pool.NonBlockingConnPool

ATTR_KEY_NODE

Constructor Summary

Constructors

Constructor and Description
BasicMultiNodeConnPool(int concurrencyLevel, java.util.concurrent.Semaphore concurrencyThrottle, java.lang.String[] nodes, io.netty.bootstrap.Bootstrap bootstrap, io.netty.channel.pool.ChannelPoolHandler connPoolHandler, int defaultPort, int connAttemptsLimit)

Method Summary

Modifier and Type	Method and Description
void	close()
protected io.netty.channel.Channel	connect(java.lang.String addr)
io.netty.channel.Channel	lease() Get the connection immediately (don't block) or null.
int	lease(java.util.List<io.netty.channel.Channel> conns, int maxCount) Get multiple connections immediately (don't block).
protected io.netty.channel.Channel	poll()
void	release(io.netty.channel.Channel conn) Release the connection back into the pool
void	release(java.util.List<io.netty.channel.Channel> conns) Release the connections back into the pool

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BasicMultiNodeConnPool

public BasicMultiNodeConnPool(int concurrencyLevel,
                              java.util.concurrent.Semaphore concurrencyThrottle,
                              java.lang.String[] nodes,
                              io.netty.bootstrap.Bootstrap bootstrap,
                              io.netty.channel.pool.ChannelPoolHandler connPoolHandler,
                              int defaultPort,
                              int connAttemptsLimit)

Method Detail

connect

protected io.netty.channel.Channel connect(java.lang.String addr)
                                    throws java.lang.Exception

Throws:

java.lang.Exception

poll

protected io.netty.channel.Channel poll()

lease

public final io.netty.channel.Channel lease()
                                     throws ConnLeaseException

Description copied from interface: NonBlockingConnPool

Get the connection immediately (don't block) or null. The caller should decide whether to fail, to sleep or to block if no connection is available at the moment.

Specified by:

lease in interface NonBlockingConnPool

Throws:

ConnLeaseException - if no connections are in the pool and was unable to create new connection

lease

public final int lease(java.util.List<io.netty.channel.Channel> conns,
                       int maxCount)
                throws ConnLeaseException

Description copied from interface: NonBlockingConnPool

Get multiple connections immediately (don't block).

Specified by:

lease in interface NonBlockingConnPool

Parameters:

conns - The output buffer to store the leased connections

maxCount - The count limit

Returns:

the actual count of the connections leased successfully, 0 if no connections available

Throws:

ConnLeaseException - if no connections are in the pool and was unable to create new connection

release

public final void release(io.netty.channel.Channel conn)

Description copied from interface: NonBlockingConnPool

Release the connection back into the pool

Specified by:

release in interface NonBlockingConnPool

release

public final void release(java.util.List<io.netty.channel.Channel> conns)

Description copied from interface: NonBlockingConnPool

Release the connections back into the pool

Specified by:

release in interface NonBlockingConnPool

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Throws:

java.io.IOException