Package net.spy.memcached.protocol

Class TCPMemcachedNodeImpl

java.lang.Object

net.spy.memcached.compat.SpyObject

net.spy.memcached.protocol.TCPMemcachedNodeImpl

All Implemented Interfaces:

MemcachedNode

Direct Known Subclasses:

AsciiMemcachedNodeImpl, BinaryMemcachedNodeImpl

public abstract class TCPMemcachedNodeImpl
extends SpyObject
implements MemcachedNode

Represents a node with the memcached cluster, along with buffering and operation queues.

Field Summary

Fields

Modifier and Type	Field	Description
protected Operation	optimizedOp
protected final BlockingQueue<Operation>	writeQ

Constructor Summary

Constructors

Constructor	Description
TCPMemcachedNodeImpl(SocketAddress sa, SocketChannel c, int bufSize, BlockingQueue<Operation> rq, BlockingQueue<Operation> wq, BlockingQueue<Operation> iq, long opQueueMaxBlockTime, boolean waitForAuth, long dt, long authWaitTime, ConnectionFactory fact)

Method Summary

Modifier and Type	Method	Description
final void	addOp(Operation op)	Add an operation to the queue.
final void	authComplete()	Let the node know that auth is complete.
void	completedRead()	Mark this node as having just completed a read.
final void	connected()	Notify this node that it has reconnected.
final void	copyInputQueue()	Move all of the operations delivered via addOperation into the internal write queue.
final ByteBuffer	decryptNextTLSDataRecord(ByteBuffer rbuf)	Convert the encrypted data record that received from this node to plain text data.
Collection<Operation>	destroyInputQueue()	Extract all queued items for this node destructively.
final boolean	doTlsHandshake(long timeoutInMillis)	Do handshake for connecting to this node when TLS enabled.
final void	fillWriteBuffer(boolean shouldOptimize)	Fill the write buffer with data from the next operations in the queue.
final void	fixupOps()	Fix up the selection ops on the selection key.
final int	getBytesRemainingToWrite()	Get the number of bytes remaining to write.
final SocketChannel	getChannel()	Get the SocketChannel for this connection.
MemcachedConnection	getConnection()
int	getContinuousTimeout()
final Operation	getCurrentReadOp()	Get the operation at the top of the queue that is requiring input.
final Operation	getCurrentWriteOp()	Get the operation at the top of the queue that has information available to write.
final NodeEndPoint	getNodeEndPoint()	Get NodeEndPoint
final ByteBuffer	getRbuf()	Get the buffer used for reading data from this node.
final int	getReconnectCount()	Get the current reconnect count.
final int	getSelectionOps()	Compute the appropriate selection operations for the channel this MemcachedNode holds to the server.
final SelectionKey	getSk()	Get the selection key from this node.
final SocketAddress	getSocketAddress()	Get the SocketAddress of the server to which this node is connected.
final ByteBuffer	getWbuf()	Get the buffer used for writing data to this node.
final boolean	hasReadOp()	True if an operation is available to read.
final boolean	hasWriteOp()	True if an operation is available to write.
final void	insertOp(Operation op)	Insert an operation to the beginning of the queue.
final boolean	isActive()	True if this node is active. i.e.
boolean	isAuthenticated()	True if this node is authenticated.
long	lastReadDelta()	Number of milliseconds since the last read of this node completed.
protected abstract void	optimize()
final void	reconnecting()	Notify this node that it will be reconnecting.
final void	registerChannel(SocketChannel ch, SelectionKey skey)	Register a channel with this node.
final Operation	removeCurrentReadOp()	Remove the operation at the top of the queue that is requiring input.
final Operation	removeCurrentWriteOp()	Remove the operation at the top of the queue that has information available to write.
final void	setChannel(SocketChannel to)	Set the SocketChannel this node uses.
void	setConnection(MemcachedConnection connection)
void	setContinuousTimeout(boolean timedOut)	Count 'time out' exceptions to drop connections that fail perpetually.
void	setNodeEndPoint(NodeEndPoint nodeEndPoint)	Set NodeEndPoint
final void	setSk(SelectionKey to)	Set the selection key for this node.
final void	setupForAuth()	Tell a node to set up for authentication.
final void	setupResend()	Clear the queue of currently processing operations by either cancelling them or setting them up to be reapplied after a reconnect.
final String	toString()
final void	transitionWriteItem()	Transition the current write item into a read state.
final int	writeSome()	Write some bytes and return the number of bytes written.

Methods inherited from class net.spy.memcached.compat.SpyObject

getLogger

Methods inherited from class java.lang.Object

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

Field Details

writeQ

protected final BlockingQueue<Operation> writeQ

optimizedOp

protected Operation optimizedOp

Constructor Details

TCPMemcachedNodeImpl

public TCPMemcachedNodeImpl(SocketAddress sa,
 SocketChannel c,
 int bufSize,
 BlockingQueue<Operation> rq,
 BlockingQueue<Operation> wq,
 BlockingQueue<Operation> iq,
 long opQueueMaxBlockTime,
 boolean waitForAuth,
 long dt,
 long authWaitTime,
 ConnectionFactory fact)

Method Details

copyInputQueue

public final void copyInputQueue()

Description copied from interface: MemcachedNode

Move all of the operations delivered via addOperation into the internal write queue.

Specified by:

copyInputQueue in interface MemcachedNode

destroyInputQueue

public Collection<Operation> destroyInputQueue()

Description copied from interface: MemcachedNode

Extract all queued items for this node destructively. This is useful for redistributing items.

Specified by:

destroyInputQueue in interface MemcachedNode

setupResend

public final void setupResend()

Description copied from interface: MemcachedNode

Clear the queue of currently processing operations by either cancelling them or setting them up to be reapplied after a reconnect.

Specified by:

setupResend in interface MemcachedNode

fillWriteBuffer

public final void fillWriteBuffer(boolean shouldOptimize)
                           throws IOException

Description copied from interface: MemcachedNode

Fill the write buffer with data from the next operations in the queue.

Specified by:

fillWriteBuffer in interface MemcachedNode

Parameters:

shouldOptimize - if true, combine sequential gets into a single multi-key get

Throws:

IOException

transitionWriteItem

public final void transitionWriteItem()

Description copied from interface: MemcachedNode

Transition the current write item into a read state.

Specified by:

transitionWriteItem in interface MemcachedNode

optimize

protected abstract void optimize()

getCurrentReadOp

public final Operation getCurrentReadOp()

Description copied from interface: MemcachedNode

Get the operation at the top of the queue that is requiring input.

Specified by:

getCurrentReadOp in interface MemcachedNode

removeCurrentReadOp

public final Operation removeCurrentReadOp()

Description copied from interface: MemcachedNode

Remove the operation at the top of the queue that is requiring input.

Specified by:

removeCurrentReadOp in interface MemcachedNode

getCurrentWriteOp

public final Operation getCurrentWriteOp()

Description copied from interface: MemcachedNode

Get the operation at the top of the queue that has information available to write.

Specified by:

getCurrentWriteOp in interface MemcachedNode

removeCurrentWriteOp

public final Operation removeCurrentWriteOp()

Description copied from interface: MemcachedNode

Remove the operation at the top of the queue that has information available to write.

Specified by:

removeCurrentWriteOp in interface MemcachedNode

hasReadOp

public final boolean hasReadOp()

Description copied from interface: MemcachedNode

True if an operation is available to read.

Specified by:

hasReadOp in interface MemcachedNode

hasWriteOp

public final boolean hasWriteOp()

Description copied from interface: MemcachedNode

True if an operation is available to write.

Specified by:

hasWriteOp in interface MemcachedNode

addOp

public final void addOp(Operation op)

Description copied from interface: MemcachedNode

Add an operation to the queue. Authentication operations should never be added to the queue, but this is not checked.

Specified by:

addOp in interface MemcachedNode

insertOp

public final void insertOp(Operation op)

Description copied from interface: MemcachedNode

Insert an operation to the beginning of the queue. This method is meant to be invoked rarely.

Specified by:

insertOp in interface MemcachedNode

getSelectionOps

public final int getSelectionOps()

Description copied from interface: MemcachedNode

Compute the appropriate selection operations for the channel this MemcachedNode holds to the server.

Specified by:

getSelectionOps in interface MemcachedNode

getRbuf

public final ByteBuffer getRbuf()

Description copied from interface: MemcachedNode

Get the buffer used for reading data from this node.

Specified by:

getRbuf in interface MemcachedNode

getWbuf

public final ByteBuffer getWbuf()

Description copied from interface: MemcachedNode

Get the buffer used for writing data to this node.

Specified by:

getWbuf in interface MemcachedNode

doTlsHandshake

public final boolean doTlsHandshake(long timeoutInMillis)
                             throws IOException

Description copied from interface: MemcachedNode

Do handshake for connecting to this node when TLS enabled.

Specified by:

doTlsHandshake in interface MemcachedNode

Returns:

true if handshake is successful, false if handshake is unsuccessful.

Throws:

IOException

decryptNextTLSDataRecord

public final ByteBuffer decryptNextTLSDataRecord(ByteBuffer rbuf)
                                          throws IOException

Description copied from interface: MemcachedNode

Convert the encrypted data record that received from this node to plain text data.

Specified by:

decryptNextTLSDataRecord in interface MemcachedNode

Returns:

buffer contains plain text data.

Throws:

IOException

getSocketAddress

public final SocketAddress getSocketAddress()

Description copied from interface: MemcachedNode

Get the SocketAddress of the server to which this node is connected.

Specified by:

getSocketAddress in interface MemcachedNode

getNodeEndPoint

public final NodeEndPoint getNodeEndPoint()

Description copied from interface: MemcachedNode

Get NodeEndPoint

Specified by:

getNodeEndPoint in interface MemcachedNode

Returns:

setNodeEndPoint

public void setNodeEndPoint(NodeEndPoint nodeEndPoint)

Description copied from interface: MemcachedNode

Set NodeEndPoint

Specified by:

setNodeEndPoint in interface MemcachedNode

Parameters:

nodeEndPoint -

isActive

public final boolean isActive()

Description copied from interface: MemcachedNode

True if this node is active. i.e. is is currently connected and expected to be able to process requests

Specified by:

isActive in interface MemcachedNode

isAuthenticated

public boolean isAuthenticated()

Description copied from interface: MemcachedNode

True if this node is authenticated.

Specified by:

isAuthenticated in interface MemcachedNode

reconnecting

public final void reconnecting()

Description copied from interface: MemcachedNode

Notify this node that it will be reconnecting.

Specified by:

reconnecting in interface MemcachedNode

connected

public final void connected()

Description copied from interface: MemcachedNode

Notify this node that it has reconnected.

Specified by:

connected in interface MemcachedNode

getReconnectCount

public final int getReconnectCount()

Description copied from interface: MemcachedNode

Get the current reconnect count.

Specified by:

getReconnectCount in interface MemcachedNode

toString

public final String toString()

Overrides:

toString in class Object

registerChannel

public final void registerChannel(SocketChannel ch,
 SelectionKey skey)

Description copied from interface: MemcachedNode

Register a channel with this node.

Specified by:

registerChannel in interface MemcachedNode

setChannel

public final void setChannel(SocketChannel to)

Description copied from interface: MemcachedNode

Set the SocketChannel this node uses.

Specified by:

setChannel in interface MemcachedNode

getChannel

public final SocketChannel getChannel()

Description copied from interface: MemcachedNode

Get the SocketChannel for this connection.

Specified by:

getChannel in interface MemcachedNode

setSk

public final void setSk(SelectionKey to)

Description copied from interface: MemcachedNode

Set the selection key for this node.

Specified by:

setSk in interface MemcachedNode

getSk

public final SelectionKey getSk()

Description copied from interface: MemcachedNode

Get the selection key from this node.

Specified by:

getSk in interface MemcachedNode

getBytesRemainingToWrite

public final int getBytesRemainingToWrite()

Description copied from interface: MemcachedNode

Get the number of bytes remaining to write.

Specified by:

getBytesRemainingToWrite in interface MemcachedNode

writeSome

public final int writeSome()
                    throws IOException

Description copied from interface: MemcachedNode

Write some bytes and return the number of bytes written.

Specified by:

writeSome in interface MemcachedNode

Returns:

the number of bytes written

Throws:

IOException - if there's a problem writing

setContinuousTimeout

public void setContinuousTimeout(boolean timedOut)

Description copied from interface: MemcachedNode

Count 'time out' exceptions to drop connections that fail perpetually.

Specified by:

setContinuousTimeout in interface MemcachedNode

Parameters:

timedOut -

getContinuousTimeout

public int getContinuousTimeout()

Specified by:

getContinuousTimeout in interface MemcachedNode

fixupOps

public final void fixupOps()

Description copied from interface: MemcachedNode

Fix up the selection ops on the selection key.

Specified by:

fixupOps in interface MemcachedNode

authComplete

public final void authComplete()

Description copied from interface: MemcachedNode

Let the node know that auth is complete. Typically this would mean the node can start processing and accept new operations to its input queue.

Specified by:

authComplete in interface MemcachedNode

setupForAuth

public final void setupForAuth()

Description copied from interface: MemcachedNode

Tell a node to set up for authentication. Typically this would mean blocking additions to the queue. In a reconnect situation this may mean putting any queued operations on hold to get to an auth complete state.

Specified by:

setupForAuth in interface MemcachedNode

lastReadDelta

public long lastReadDelta()

Number of milliseconds since the last read of this node completed.

Specified by:

lastReadDelta in interface MemcachedNode

Returns:

milliseconds since last read.

completedRead

public void completedRead()

Mark this node as having just completed a read.

Specified by:

completedRead in interface MemcachedNode

getConnection

public MemcachedConnection getConnection()

Specified by:

getConnection in interface MemcachedNode

setConnection

public void setConnection(MemcachedConnection connection)

Specified by:

setConnection in interface MemcachedNode