Package com.netflix.zuul.netty.connectionpool

Class PerServerConnectionPool

java.lang.Object

com.netflix.zuul.netty.connectionpool.PerServerConnectionPool

All Implemented Interfaces:

IConnectionPool

public class PerServerConnectionPool
extends Object
implements IConnectionPool

User: [email protected] Date: 7/8/16 Time: 1:09 PM

Field Summary

Fields

Modifier and Type	Field	Description
static final io.netty.util.AttributeKey<IConnectionPool>	CHANNEL_ATTR
protected final com.netflix.spectator.api.Counter	closeAboveHighWaterMarkCounter
protected final ConnectionPoolConfig	config
protected final AtomicInteger	connCreationsInProgress	This is the count of connections currently in progress of being established.
protected final NettyClientConnectionFactory	connectionFactory
protected final ConcurrentHashMap<io.netty.channel.EventLoop,Deque<PooledConnection>>	connectionsPerEventLoop
protected final com.netflix.spectator.api.Timer	connEstablishTimer
protected final AtomicInteger	connsInPool
protected final AtomicInteger	connsInUse
protected final com.netflix.spectator.api.Counter	connTakenFromPoolIsNotOpen
protected final com.netflix.spectator.api.Counter	createConnFailedCounter
protected final com.netflix.spectator.api.Counter	createConnSucceededCounter
protected final com.netflix.spectator.api.Counter	createNewConnCounter
protected boolean	draining
protected final com.netflix.spectator.api.Counter	maxConnsPerHostExceededCounter
protected final com.netflix.client.config.IClientConfig	niwsClientConfig
protected final PooledConnectionFactory	pooledConnectionFactory
protected final com.netflix.spectator.api.Counter	requestConnCounter
protected final com.netflix.spectator.api.Counter	reuseConnCounter
protected final com.netflix.zuul.discovery.DiscoveryResult	server
protected final SocketAddress	serverAddr

Constructor Summary

Constructors

Constructor

Description

PerServerConnectionPool(com.netflix.zuul.discovery.DiscoveryResult server, SocketAddress serverAddr, NettyClientConnectionFactory connectionFactory, PooledConnectionFactory pooledConnectionFactory, ConnectionPoolConfig config, com.netflix.client.config.IClientConfig niwsClientConfig, com.netflix.spectator.api.Counter createNewConnCounter, com.netflix.spectator.api.Counter createConnSucceededCounter, com.netflix.spectator.api.Counter createConnFailedCounter, com.netflix.spectator.api.Counter requestConnCounter, com.netflix.spectator.api.Counter reuseConnCounter, com.netflix.spectator.api.Counter connTakenFromPoolIsNotOpen, com.netflix.spectator.api.Counter closeAboveHighWaterMarkCounter, com.netflix.spectator.api.Counter maxConnsPerHostExceededCounter, com.netflix.spectator.api.Timer connEstablishTimer, AtomicInteger connsInPool, AtomicInteger connsInUse)

Method Summary

Modifier and Type	Method	Description
io.netty.util.concurrent.Promise<PooledConnection>	acquire(io.netty.channel.EventLoop eventLoop, CurrentPassport passport, AtomicReference<? super InetAddress> selectedHostAddr)
protected io.netty.channel.ChannelFuture	connectToServer(io.netty.channel.EventLoop eventLoop, CurrentPassport passport, SocketAddress serverAddr)
protected void	createConnection(io.netty.channel.ChannelFuture cf, io.netty.util.concurrent.Promise<PooledConnection> callerPromise, CurrentPassport passport)
void	drain()
ConnectionPoolConfig	getConfig()
int	getConnsInPool()
int	getConnsInUse()
com.netflix.client.config.IClientConfig	getNiwsClientConfig()
protected Deque<PooledConnection>	getPoolForEventLoop(io.netty.channel.EventLoop eventLoop)
protected void	handleConnectCompletion(io.netty.channel.ChannelFuture cf, io.netty.util.concurrent.Promise<PooledConnection> callerPromise, CurrentPassport passport)
protected void	initPooledConnection(PooledConnection conn, io.netty.util.concurrent.Promise<PooledConnection> promise)
boolean	isAvailable()
protected boolean	isValidFromPool(PooledConnection conn)
protected void	onAcquire(PooledConnection conn, CurrentPassport passport)	function to run when a connection is acquired before returning it to caller.
boolean	release(PooledConnection conn)
boolean	remove(PooledConnection conn)
protected void	removeIdleStateHandler(PooledConnection conn)
void	shutdown()
PooledConnection	tryGettingFromConnectionPool(io.netty.channel.EventLoop eventLoop)
protected void	tryMakingNewConnection(io.netty.channel.EventLoop eventLoop, io.netty.util.concurrent.Promise<PooledConnection> promise, CurrentPassport passport, AtomicReference<? super InetAddress> selectedHostAddr)
protected void	updateServerStatsOnAcquire()
protected void	updateServerStatsOnConnectCompletion(io.netty.channel.ChannelFuture cf)

Methods inherited from class java.lang.Object

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

Field Details

CHANNEL_ATTR

public static final io.netty.util.AttributeKey<IConnectionPool> CHANNEL_ATTR

connectionsPerEventLoop

protected final ConcurrentHashMap<io.netty.channel.EventLoop,Deque<PooledConnection>> connectionsPerEventLoop

pooledConnectionFactory

protected final PooledConnectionFactory pooledConnectionFactory

server

protected final com.netflix.zuul.discovery.DiscoveryResult server

serverAddr

protected final SocketAddress serverAddr

connectionFactory

protected final NettyClientConnectionFactory connectionFactory

config

protected final ConnectionPoolConfig config

niwsClientConfig

protected final com.netflix.client.config.IClientConfig niwsClientConfig

createNewConnCounter

protected final com.netflix.spectator.api.Counter createNewConnCounter

createConnSucceededCounter

protected final com.netflix.spectator.api.Counter createConnSucceededCounter

createConnFailedCounter

protected final com.netflix.spectator.api.Counter createConnFailedCounter

requestConnCounter

protected final com.netflix.spectator.api.Counter requestConnCounter

reuseConnCounter

protected final com.netflix.spectator.api.Counter reuseConnCounter

connTakenFromPoolIsNotOpen

protected final com.netflix.spectator.api.Counter connTakenFromPoolIsNotOpen

maxConnsPerHostExceededCounter

protected final com.netflix.spectator.api.Counter maxConnsPerHostExceededCounter

closeAboveHighWaterMarkCounter

protected final com.netflix.spectator.api.Counter closeAboveHighWaterMarkCounter

connEstablishTimer

protected final com.netflix.spectator.api.Timer connEstablishTimer

connsInPool

protected final AtomicInteger connsInPool

connsInUse

protected final AtomicInteger connsInUse

connCreationsInProgress

protected final AtomicInteger connCreationsInProgress

This is the count of connections currently in progress of being established. They will only be added to connsInUse _after_ establishment has completed.

draining

protected volatile boolean draining

Constructor Details

PerServerConnectionPool

public PerServerConnectionPool(com.netflix.zuul.discovery.DiscoveryResult server,
 SocketAddress serverAddr,
 NettyClientConnectionFactory connectionFactory,
 PooledConnectionFactory pooledConnectionFactory,
 ConnectionPoolConfig config,
 com.netflix.client.config.IClientConfig niwsClientConfig,
 com.netflix.spectator.api.Counter createNewConnCounter,
 com.netflix.spectator.api.Counter createConnSucceededCounter,
 com.netflix.spectator.api.Counter createConnFailedCounter,
 com.netflix.spectator.api.Counter requestConnCounter,
 com.netflix.spectator.api.Counter reuseConnCounter,
 com.netflix.spectator.api.Counter connTakenFromPoolIsNotOpen,
 com.netflix.spectator.api.Counter closeAboveHighWaterMarkCounter,
 com.netflix.spectator.api.Counter maxConnsPerHostExceededCounter,
 com.netflix.spectator.api.Timer connEstablishTimer,
 AtomicInteger connsInPool,
 AtomicInteger connsInUse)

Method Details

getConfig

public ConnectionPoolConfig getConfig()

Specified by:

getConfig in interface IConnectionPool

getNiwsClientConfig

public com.netflix.client.config.IClientConfig getNiwsClientConfig()

isAvailable

public boolean isAvailable()

Specified by:

isAvailable in interface IConnectionPool

onAcquire

protected void onAcquire(PooledConnection conn,
 CurrentPassport passport)

function to run when a connection is acquired before returning it to caller.

removeIdleStateHandler

protected void removeIdleStateHandler(PooledConnection conn)

acquire

public io.netty.util.concurrent.Promise<PooledConnection> acquire(io.netty.channel.EventLoop eventLoop,
 CurrentPassport passport,
 AtomicReference<? super InetAddress> selectedHostAddr)

Specified by:

acquire in interface IConnectionPool

updateServerStatsOnAcquire

protected void updateServerStatsOnAcquire()

tryGettingFromConnectionPool

public PooledConnection tryGettingFromConnectionPool(io.netty.channel.EventLoop eventLoop)

isValidFromPool

protected boolean isValidFromPool(PooledConnection conn)

initPooledConnection

protected void initPooledConnection(PooledConnection conn,
 io.netty.util.concurrent.Promise<PooledConnection> promise)

getPoolForEventLoop

protected Deque<PooledConnection> getPoolForEventLoop(io.netty.channel.EventLoop eventLoop)

tryMakingNewConnection

protected void tryMakingNewConnection(io.netty.channel.EventLoop eventLoop,
 io.netty.util.concurrent.Promise<PooledConnection> promise,
 CurrentPassport passport,
 AtomicReference<? super InetAddress> selectedHostAddr)

connectToServer

protected io.netty.channel.ChannelFuture connectToServer(io.netty.channel.EventLoop eventLoop,
 CurrentPassport passport,
 SocketAddress serverAddr)

handleConnectCompletion

protected void handleConnectCompletion(io.netty.channel.ChannelFuture cf,
 io.netty.util.concurrent.Promise<PooledConnection> callerPromise,
 CurrentPassport passport)

updateServerStatsOnConnectCompletion

protected void updateServerStatsOnConnectCompletion(io.netty.channel.ChannelFuture cf)

createConnection

protected void createConnection(io.netty.channel.ChannelFuture cf,
 io.netty.util.concurrent.Promise<PooledConnection> callerPromise,
 CurrentPassport passport)

release

public boolean release(PooledConnection conn)

Specified by:

release in interface IConnectionPool

remove

public boolean remove(PooledConnection conn)

Specified by:

remove in interface IConnectionPool

shutdown

public void shutdown()

Specified by:

shutdown in interface IConnectionPool

drain

public void drain()

Specified by:

drain in interface IConnectionPool

getConnsInPool

public int getConnsInPool()

Specified by:

getConnsInPool in interface IConnectionPool

getConnsInUse

public int getConnsInUse()

Specified by:

getConnsInUse in interface IConnectionPool