org.apache.tomcat.util.net

Class SocketWrapperBase<E>

java.lang.Object

org.apache.tomcat.util.net.SocketWrapperBase<E>

Direct Known Subclasses:

AprEndpoint.AprSocketWrapper, Nio2Endpoint.Nio2SocketWrapper, NioEndpoint.NioSocketWrapper

public abstract class SocketWrapperBase<E>
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SocketWrapperBase.BlockingMode
static interface	SocketWrapperBase.CompletionCheck
static class	SocketWrapperBase.CompletionHandlerCall
static class	SocketWrapperBase.CompletionState
protected class	SocketWrapperBase.OperationState<A> Internal state tracker for vectored operations.
protected class	SocketWrapperBase.VectoredIOCompletionHandler<A> Completion handler for vectored operations.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bufferedWriteSize The max size of the individual buffered write buffers
protected AtomicBoolean	closed
static SocketWrapperBase.CompletionCheck	COMPLETE_READ This utility CompletionCheck will cause the completion handler to be called once the given buffers are full.
static SocketWrapperBase.CompletionCheck	COMPLETE_READ_WITH_COMPLETION This utility CompletionCheck will cause the completion handler to be called once the given buffers are full.
static SocketWrapperBase.CompletionCheck	COMPLETE_WRITE This utility CompletionCheck will cause the write to fully write all remaining data.
static SocketWrapperBase.CompletionCheck	COMPLETE_WRITE_WITH_COMPLETION This utility CompletionCheck will cause the write to fully write all remaining data.
protected Object	currentProcessor The org.apache.coyote.Processor instance currently associated with the wrapper.
protected String	localAddr
protected String	localName
protected int	localPort
protected WriteBuffer	nonBlockingWriteBuffer Additional buffer used for non-blocking writes.
protected IOException	previousIOException
static SocketWrapperBase.CompletionCheck	READ_DATA This utility CompletionCheck will cause the completion handler to be called once some data has been read.
protected SocketWrapperBase.OperationState<?>	readOperation
protected Semaphore	readPending
protected String	remoteAddr
protected String	remoteHost
protected int	remotePort
protected static StringManager	sm
protected SocketBufferHandler	socketBufferHandler The buffers used for communicating with the socket.
protected SocketWrapperBase.OperationState<?>	writeOperation
protected Semaphore	writePending

Constructor Summary

Constructors

Constructor and Description
SocketWrapperBase(E socket, AbstractEndpoint<E,?> endpoint)

Method Summary

Modifier and Type	Method and Description
boolean	awaitReadComplete(long timeout, TimeUnit unit) Deprecated.
boolean	awaitWriteComplete(long timeout, TimeUnit unit) Deprecated.
protected static boolean	buffersArrayHasRemaining(ByteBuffer[] buffers, int offset, int length)
boolean	canWrite()
void	checkError()
void	close() Close the socket wrapper.
abstract SendfileDataBase	createSendfileData(String filename, long pos, long length)
int	decrementKeepAlive()
abstract void	doClientAuth(SSLSupport sslSupport) Require the client to perform CLIENT-CERT authentication if it hasn't already done so.
protected abstract void	doClose() Perform the actual close.
protected void	doWrite(boolean block) Write the contents of the socketWriteBuffer to the socket.
protected abstract void	doWrite(boolean block, ByteBuffer from) Write the contents of the ByteBuffer to the socket.
void	execute(Runnable runnable) Transfers processing to a container thread.
boolean	flush(boolean block) Writes as much data as possible from any that remains in the buffers.
protected void	flushBlocking()
protected boolean	flushNonBlocking()
Object	getCurrentProcessor()
protected AbstractEndpoint<E,?>	getEndpoint()
IOException	getError()
String	getLocalAddr()
String	getLocalName()
int	getLocalPort()
String	getNegotiatedProtocol()
long	getReadTimeout()
String	getRemoteAddr()
String	getRemoteHost()
int	getRemotePort()
E	getSocket()
SocketBufferHandler	getSocketBufferHandler()
abstract SSLSupport	getSslSupport() Obtain an SSLSupport instance for this socket.
SSLSupport	getSslSupport(String clientCertProvider) Deprecated. Will be removed in Tomcat 10.1.x onwards
long	getWriteTimeout()
boolean	hasAsyncIO() Allows using NIO2 style read/write.
boolean	hasDataToRead()
boolean	hasDataToWrite()
boolean	hasPerOperationTimeout() Allows indicating if the connector supports per operation timeout.
boolean	isClosed()
boolean	isReadPending() Allows checking if an asynchronous read operation is currently pending.
abstract boolean	isReadyForRead()
boolean	isReadyForWrite() Checks to see if there are any writes pending and if there are calls registerWriteInterest() to trigger a callback once the pending writes have completed.
boolean	isSecure() Deprecated. Unused. Will be removed in Tomcat 10.
boolean	isUpgraded() Deprecated. Unused. Will be removed in Tomcat 10.
boolean	isWritePending() Allows checking if an asynchronous write operation is currently pending.
boolean	needSemaphores() Allows indicating if the connector needs semaphores.
protected abstract <A> SocketWrapperBase.OperationState<A>	newOperationState(boolean read, ByteBuffer[] buffers, int offset, int length, SocketWrapperBase.BlockingMode block, long timeout, TimeUnit unit, A attachment, SocketWrapperBase.CompletionCheck check, CompletionHandler<Long,? super A> handler, Semaphore semaphore, SocketWrapperBase.VectoredIOCompletionHandler<A> completion)
protected abstract void	populateLocalAddr()
protected abstract void	populateLocalName()
protected abstract void	populateLocalPort()
protected int	populateReadBuffer(byte[] b, int off, int len)
protected int	populateReadBuffer(ByteBuffer to)
protected abstract void	populateRemoteAddr()
protected abstract void	populateRemoteHost()
protected abstract void	populateRemotePort()
abstract SendfileState	processSendfile(SendfileDataBase sendfileData) Starts the sendfile process.
void	processSocket(SocketEvent socketStatus, boolean dispatch)
abstract int	read(boolean block, byte[] b, int off, int len)
abstract int	read(boolean block, ByteBuffer to)
<A> SocketWrapperBase.CompletionState	read(ByteBuffer[] dsts, int offset, int length, SocketWrapperBase.BlockingMode block, long timeout, TimeUnit unit, A attachment, SocketWrapperBase.CompletionCheck check, CompletionHandler<Long,? super A> handler) Scatter read.
<A> SocketWrapperBase.CompletionState	read(long timeout, TimeUnit unit, A attachment, CompletionHandler<Long,? super A> handler, ByteBuffer... dsts) Scatter read.
<A> SocketWrapperBase.CompletionState	read(SocketWrapperBase.BlockingMode block, long timeout, TimeUnit unit, A attachment, SocketWrapperBase.CompletionCheck check, CompletionHandler<Long,? super A> handler, ByteBuffer... dsts) Scatter read.
abstract void	registerReadInterest()
abstract void	registerWriteInterest()
protected void	reset(E closedSocket)
abstract void	setAppReadBufHandler(ApplicationBufferHandler handler)
void	setCurrentProcessor(Object currentProcessor)
void	setError(IOException error)
void	setKeepAliveLeft(int keepAliveLeft)
void	setNegotiatedProtocol(String negotiatedProtocol)
void	setReadTimeout(long readTimeout) Set the timeout for reading.
void	setSecure(boolean secure) Deprecated. Unused. Will be removed in Tomcat 10.
void	setUpgraded(boolean upgraded) Deprecated. Unused. Will be removed in Tomcat 10.
void	setWriteTimeout(long writeTimeout) Set the timeout for writing.
String	toString() Overridden for debug purposes.
protected static int	transfer(byte[] from, int offset, int length, ByteBuffer to)
protected static int	transfer(ByteBuffer from, ByteBuffer to)
void	unRead(ByteBuffer returnedInput) Return input that has been read to the input buffer for re-reading by the correct component.
protected <A> SocketWrapperBase.CompletionState	vectoredOperation(boolean read, ByteBuffer[] buffers, int offset, int length, SocketWrapperBase.BlockingMode block, long timeout, TimeUnit unit, A attachment, SocketWrapperBase.CompletionCheck check, CompletionHandler<Long,? super A> handler) Vectored operation.
void	write(boolean block, byte[] buf, int off, int len) Writes the provided data to the socket write buffer.
void	write(boolean block, ByteBuffer from) Writes the provided data to the socket write buffer.
<A> SocketWrapperBase.CompletionState	write(ByteBuffer[] srcs, int offset, int length, SocketWrapperBase.BlockingMode block, long timeout, TimeUnit unit, A attachment, SocketWrapperBase.CompletionCheck check, CompletionHandler<Long,? super A> handler) Gather write.
<A> SocketWrapperBase.CompletionState	write(long timeout, TimeUnit unit, A attachment, CompletionHandler<Long,? super A> handler, ByteBuffer... srcs) Gather write.
<A> SocketWrapperBase.CompletionState	write(SocketWrapperBase.BlockingMode block, long timeout, TimeUnit unit, A attachment, SocketWrapperBase.CompletionCheck check, CompletionHandler<Long,? super A> handler, ByteBuffer... srcs) Gather write.
protected void	writeBlocking(byte[] buf, int off, int len) Writes the provided data to the socket write buffer.
protected void	writeBlocking(ByteBuffer from) Writes the provided data to the socket write buffer.
protected void	writeNonBlocking(byte[] buf, int off, int len) Transfers the data to the socket write buffer (writing that data to the socket if the buffer fills up using a non-blocking write) until either all the data has been transferred and space remains in the socket write buffer or a non-blocking write leaves data in the socket write buffer.
protected void	writeNonBlocking(ByteBuffer from) Transfers the data to the socket write buffer (writing that data to the socket if the buffer fills up using a non-blocking write) until either all the data has been transferred and space remains in the socket write buffer or a non-blocking write leaves data in the socket write buffer.
protected void	writeNonBlockingInternal(ByteBuffer from) Separate method so it can be re-used by the socket write buffer to write data to the network

Methods inherited from class java.lang.Object

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

Field Detail

sm

protected static final StringManager sm

closed

protected final AtomicBoolean closed

previousIOException

protected volatile IOException previousIOException

localAddr

protected String localAddr

localName

protected String localName

localPort

protected int localPort

remoteAddr

protected String remoteAddr

remoteHost

protected String remoteHost

remotePort

protected int remotePort

socketBufferHandler

protected volatile SocketBufferHandler socketBufferHandler

The buffers used for communicating with the socket.

bufferedWriteSize

protected int bufferedWriteSize

The max size of the individual buffered write buffers

nonBlockingWriteBuffer

protected final WriteBuffer nonBlockingWriteBuffer

Additional buffer used for non-blocking writes. Non-blocking writes need to return immediately even if the data cannot be written immediately but the socket buffer may not be big enough to hold all of the unwritten data. This structure provides an additional buffer to hold the data until it can be written. Not that while the Servlet API only allows one non-blocking write at a time, due to buffering and the possible need to write HTTP headers, this layer may see multiple writes.

readPending

protected final Semaphore readPending

readOperation

protected volatile SocketWrapperBase.OperationState<?> readOperation

writePending

protected final Semaphore writePending

writeOperation

protected volatile SocketWrapperBase.OperationState<?> writeOperation

currentProcessor

protected Object currentProcessor

The org.apache.coyote.Processor instance currently associated with the wrapper.

COMPLETE_WRITE

public static final SocketWrapperBase.CompletionCheck COMPLETE_WRITE

This utility CompletionCheck will cause the write to fully write all remaining data. If the operation completes inline, the completion handler will not be called.

COMPLETE_WRITE_WITH_COMPLETION

public static final SocketWrapperBase.CompletionCheck COMPLETE_WRITE_WITH_COMPLETION

This utility CompletionCheck will cause the write to fully write all remaining data. The completion handler will then be called.

READ_DATA

public static final SocketWrapperBase.CompletionCheck READ_DATA

This utility CompletionCheck will cause the completion handler to be called once some data has been read. If the operation completes inline, the completion handler will not be called.

COMPLETE_READ_WITH_COMPLETION

public static final SocketWrapperBase.CompletionCheck COMPLETE_READ_WITH_COMPLETION

This utility CompletionCheck will cause the completion handler to be called once the given buffers are full. The completion handler will then be called.

COMPLETE_READ

public static final SocketWrapperBase.CompletionCheck COMPLETE_READ

This utility CompletionCheck will cause the completion handler to be called once the given buffers are full. If the operation completes inline, the completion handler will not be called.

Constructor Detail

SocketWrapperBase

public SocketWrapperBase(E socket,
                         AbstractEndpoint<E,?> endpoint)

Method Detail

getSocket

public E getSocket()

reset

protected void reset(E closedSocket)

getEndpoint

protected AbstractEndpoint<E,?> getEndpoint()

getCurrentProcessor

public Object getCurrentProcessor()

setCurrentProcessor

public void setCurrentProcessor(Object currentProcessor)

execute

public void execute(Runnable runnable)

Transfers processing to a container thread.

Parameters:

runnable - The actions to process on a container thread

Throws:

RejectedExecutionException - If the runnable cannot be executed

getError

public IOException getError()

setError

public void setError(IOException error)

checkError

public void checkError()
                throws IOException

Throws:

IOException

isUpgraded

@Deprecated
public boolean isUpgraded()

Deprecated. Unused. Will be removed in Tomcat 10.

Returns:

true if the connection has been upgraded.

setUpgraded

@Deprecated
public void setUpgraded(boolean upgraded)

Deprecated. Unused. Will be removed in Tomcat 10.

Parameters:

upgraded - true if the connection has been upgraded.

isSecure

@Deprecated
public boolean isSecure()

Deprecated. Unused. Will be removed in Tomcat 10.

Returns:

true if the connection uses TLS

setSecure

@Deprecated
public void setSecure(boolean secure)

Deprecated. Unused. Will be removed in Tomcat 10.

Parameters:

secure - true if the connection uses TLS

getNegotiatedProtocol

public String getNegotiatedProtocol()

setNegotiatedProtocol

public void setNegotiatedProtocol(String negotiatedProtocol)

setReadTimeout

public void setReadTimeout(long readTimeout)

Set the timeout for reading. Values of zero or less will be changed to -1.

Parameters:

readTimeout - The timeout in milliseconds. A value of -1 indicates an infinite timeout.

getReadTimeout

public long getReadTimeout()

setWriteTimeout

public void setWriteTimeout(long writeTimeout)

Set the timeout for writing. Values of zero or less will be changed to -1.

Parameters:

writeTimeout - The timeout in milliseconds. A value of zero or less indicates an infinite timeout.

getWriteTimeout

public long getWriteTimeout()

setKeepAliveLeft

public void setKeepAliveLeft(int keepAliveLeft)

decrementKeepAlive

public int decrementKeepAlive()

getRemoteHost

public String getRemoteHost()

populateRemoteHost

protected abstract void populateRemoteHost()

getRemoteAddr

public String getRemoteAddr()

populateRemoteAddr

protected abstract void populateRemoteAddr()

getRemotePort

public int getRemotePort()

populateRemotePort

protected abstract void populateRemotePort()

getLocalName

public String getLocalName()

populateLocalName

protected abstract void populateLocalName()

getLocalAddr

public String getLocalAddr()

populateLocalAddr

protected abstract void populateLocalAddr()

getLocalPort

public int getLocalPort()

populateLocalPort

protected abstract void populateLocalPort()

getSocketBufferHandler

public SocketBufferHandler getSocketBufferHandler()

hasDataToRead

public boolean hasDataToRead()

hasDataToWrite

public boolean hasDataToWrite()

isReadyForWrite

public boolean isReadyForWrite()

Checks to see if there are any writes pending and if there are calls registerWriteInterest() to trigger a callback once the pending writes have completed.

Note: Once this method has returned false it MUST NOT be called again until the pending write has completed and the callback has been fired. TODO: Modify registerWriteInterest() so the above restriction is enforced there rather than relying on the caller.

Returns:

true if no writes are pending and data can be written otherwise false

canWrite

public boolean canWrite()

toString

public String toString()

Overridden for debug purposes. No guarantees are made about the format of this message which may vary significantly between point releases.

Overrides:

toString in class Object

read

public abstract int read(boolean block,
                         byte[] b,
                         int off,
                         int len)
                  throws IOException

Throws:

IOException

read

public abstract int read(boolean block,
                         ByteBuffer to)
                  throws IOException

Throws:

IOException

isReadyForRead

public abstract boolean isReadyForRead()
                                throws IOException

Throws:

IOException

setAppReadBufHandler

public abstract void setAppReadBufHandler(ApplicationBufferHandler handler)

populateReadBuffer

protected int populateReadBuffer(byte[] b,
                                 int off,
                                 int len)

populateReadBuffer

protected int populateReadBuffer(ByteBuffer to)

unRead

public void unRead(ByteBuffer returnedInput)

Return input that has been read to the input buffer for re-reading by the correct component. There are times when a component may read more data than it needs before it passes control to another component. One example of this is during HTTP upgrade. If an (arguably misbehaving client) sends data associated with the upgraded protocol before the HTTP upgrade completes, the HTTP handler may read it. This method provides a way for that data to be returned so it can be processed by the correct component.

Parameters:

returnedInput - The input to return to the input buffer.

close

public void close()

Close the socket wrapper.

doClose

protected abstract void doClose()

Perform the actual close. The closed atomic boolean guarantees this will be called only once per wrapper.

isClosed

public boolean isClosed()

Returns:

true if the wrapper has been closed

write

public final void write(boolean block,
                        byte[] buf,
                        int off,
                        int len)
                 throws IOException

Writes the provided data to the socket write buffer. If the socket write buffer fills during the write, the content of the socket write buffer is written to the network and this method starts to fill the socket write buffer again. Depending on the size of the data to write, there may be multiple writes to the network.

Non-blocking writes must return immediately and the byte array holding the data to be written must be immediately available for re-use. It may not be possible to write sufficient data to the network to allow this to happen. In this case data that cannot be written to the network and cannot be held by the socket buffer is stored in the non-blocking write buffer.

Note: There is an implementation assumption that, before switching from non-blocking writes to blocking writes, any data remaining in the non-blocking write buffer will have been written to the network.

Parameters:

block - true if a blocking write should be used, otherwise a non-blocking write will be used

buf - The byte array containing the data to be written

off - The offset within the byte array of the data to be written

len - The length of the data to be written

Throws:

IOException - If an IO error occurs during the write

write

public final void write(boolean block,
                        ByteBuffer from)
                 throws IOException

Writes the provided data to the socket write buffer. If the socket write buffer fills during the write, the content of the socket write buffer is written to the network and this method starts to fill the socket write buffer again. Depending on the size of the data to write, there may be multiple writes to the network.

Non-blocking writes must return immediately and the ByteBuffer holding the data to be written must be immediately available for re-use. It may not be possible to write sufficient data to the network to allow this to happen. In this case data that cannot be written to the network and cannot be held by the socket buffer is stored in the non-blocking write buffer.

Note: There is an implementation assumption that, before switching from non-blocking writes to blocking writes, any data remaining in the non-blocking write buffer will have been written to the network.

Parameters:

block - true if a blocking write should be used, otherwise a non-blocking write will be used

from - The ByteBuffer containing the data to be written

Throws:

IOException - If an IO error occurs during the write

writeBlocking

protected void writeBlocking(byte[] buf,
                             int off,
                             int len)
                      throws IOException

Writes the provided data to the socket write buffer. If the socket write buffer fills during the write, the content of the socket write buffer is written to the network using a blocking write. Once that blocking write is complete, this method starts to fill the socket write buffer again. Depending on the size of the data to write, there may be multiple writes to the network. On completion of this method there will always be space remaining in the socket write buffer.

Parameters:

buf - The byte array containing the data to be written

off - The offset within the byte array of the data to be written

len - The length of the data to be written

Throws:

IOException - If an IO error occurs during the write

writeBlocking

protected void writeBlocking(ByteBuffer from)
                      throws IOException

Writes the provided data to the socket write buffer. If the socket write buffer fills during the write, the content of the socket write buffer is written to the network using a blocking write. Once that blocking write is complete, this method starts to fill the socket write buffer again. Depending on the size of the data to write, there may be multiple writes to the network. On completion of this method there will always be space remaining in the socket write buffer.

Parameters:

from - The ByteBuffer containing the data to be written

Throws:

IOException - If an IO error occurs during the write

writeNonBlocking

protected void writeNonBlocking(byte[] buf,
                                int off,
                                int len)
                         throws IOException

Transfers the data to the socket write buffer (writing that data to the socket if the buffer fills up using a non-blocking write) until either all the data has been transferred and space remains in the socket write buffer or a non-blocking write leaves data in the socket write buffer. After an incomplete write, any data remaining to be transferred to the socket write buffer will be copied to the socket write buffer. If the remaining data is too big for the socket write buffer, the socket write buffer will be filled and the additional data written to the non-blocking write buffer.

Parameters:

buf - The byte array containing the data to be written

off - The offset within the byte array of the data to be written

len - The length of the data to be written

Throws:

IOException - If an IO error occurs during the write

writeNonBlocking

protected void writeNonBlocking(ByteBuffer from)
                         throws IOException

Transfers the data to the socket write buffer (writing that data to the socket if the buffer fills up using a non-blocking write) until either all the data has been transferred and space remains in the socket write buffer or a non-blocking write leaves data in the socket write buffer. After an incomplete write, any data remaining to be transferred to the socket write buffer will be copied to the socket write buffer. If the remaining data is too big for the socket write buffer, the socket write buffer will be filled and the additional data written to the non-blocking write buffer.

Parameters:

from - The ByteBuffer containing the data to be written

Throws:

IOException - If an IO error occurs during the write

writeNonBlockingInternal

protected void writeNonBlockingInternal(ByteBuffer from)
                                 throws IOException

Separate method so it can be re-used by the socket write buffer to write data to the network

Parameters:

from - The ByteBuffer containing the data to be written

Throws:

IOException - If an IO error occurs during the write

flush

public boolean flush(boolean block)
              throws IOException

Writes as much data as possible from any that remains in the buffers.

Parameters:

block - true if a blocking write should be used, otherwise a non-blocking write will be used

Returns:

true if data remains to be flushed after this method completes, otherwise false. In blocking mode therefore, the return value should always be false

Throws:

IOException - If an IO error occurs during the write

flushBlocking

protected void flushBlocking()
                      throws IOException

Throws:

IOException

flushNonBlocking

protected boolean flushNonBlocking()
                            throws IOException

Throws:

IOException

doWrite

protected void doWrite(boolean block)
                throws IOException

Write the contents of the socketWriteBuffer to the socket. For blocking writes either then entire contents of the buffer will be written or an IOException will be thrown. Partial blocking writes will not occur.

Parameters:

block - Should the write be blocking or not?

Throws:

IOException - If an I/O error such as a timeout occurs during the write

doWrite

protected abstract void doWrite(boolean block,
                                ByteBuffer from)
                         throws IOException

Write the contents of the ByteBuffer to the socket. For blocking writes either then entire contents of the buffer will be written or an IOException will be thrown. Partial blocking writes will not occur.

Parameters:

block - Should the write be blocking or not?

from - the ByteBuffer containing the data to be written

Throws:

IOException - If an I/O error such as a timeout occurs during the write

processSocket

public void processSocket(SocketEvent socketStatus,
                          boolean dispatch)

registerReadInterest

public abstract void registerReadInterest()

registerWriteInterest

public abstract void registerWriteInterest()

createSendfileData

public abstract SendfileDataBase createSendfileData(String filename,
                                                    long pos,
                                                    long length)

processSendfile

public abstract SendfileState processSendfile(SendfileDataBase sendfileData)

Starts the sendfile process. It is expected that if the sendfile process does not complete during this call and does not report an error, that the caller will not add the socket to the poller (or equivalent). That is the responsibility of this method.

Parameters:

sendfileData - Data representing the file to send

Returns:

The state of the sendfile process after the first write.

doClientAuth

public abstract void doClientAuth(SSLSupport sslSupport)
                           throws IOException

Require the client to perform CLIENT-CERT authentication if it hasn't already done so.

Parameters:

sslSupport - The SSL/TLS support instance currently being used by the connection that may need updating after the client authentication

Throws:

IOException - If authentication is required then there will be I/O with the client and this exception will be thrown if that goes wrong

getSslSupport

@Deprecated
public SSLSupport getSslSupport(String clientCertProvider)

Deprecated. Will be removed in Tomcat 10.1.x onwards

Obtain an SSLSupport instance for this socket.

Parameters:

clientCertProvider - The name of the client certificate provider to use. Only used by APR/native.

Returns:

An SSLSupport instance for this socket.

getSslSupport

public abstract SSLSupport getSslSupport()

Obtain an SSLSupport instance for this socket.

Returns:

An SSLSupport instance for this socket.

hasAsyncIO

public boolean hasAsyncIO()

Allows using NIO2 style read/write.

Returns:

true if the connector has the capability enabled

needSemaphores

public boolean needSemaphores()

Allows indicating if the connector needs semaphores.

Returns:

This default implementation always returns false

hasPerOperationTimeout

public boolean hasPerOperationTimeout()

Allows indicating if the connector supports per operation timeout.

Returns:

This default implementation always returns false

isReadPending

public boolean isReadPending()

Allows checking if an asynchronous read operation is currently pending.

Returns:

true if the endpoint supports asynchronous IO and a read operation is being processed asynchronously

isWritePending

public boolean isWritePending()

Allows checking if an asynchronous write operation is currently pending.

Returns:

true if the endpoint supports asynchronous IO and a write operation is being processed asynchronously

awaitReadComplete

@Deprecated
public boolean awaitReadComplete(long timeout,
                                             TimeUnit unit)

Deprecated.

If an asynchronous read operation is pending, this method will block until the operation completes, or the specified amount of time has passed.

Parameters:

timeout - The maximum amount of time to wait

unit - The unit for the timeout

Returns:

true if the read operation is complete, false if the operation is still pending and the specified timeout has passed

awaitWriteComplete

@Deprecated
public boolean awaitWriteComplete(long timeout,
                                              TimeUnit unit)

Deprecated.

If an asynchronous write operation is pending, this method will block until the operation completes, or the specified amount of time has passed.

Parameters:

timeout - The maximum amount of time to wait

unit - The unit for the timeout

Returns:

true if the read operation is complete, false if the operation is still pending and the specified timeout has passed

read

public final <A> SocketWrapperBase.CompletionState read(long timeout,
                                                        TimeUnit unit,
                                                        A attachment,
                                                        CompletionHandler<Long,? super A> handler,
                                                        ByteBuffer... dsts)

Scatter read. The completion handler will be called once some data has been read or an error occurred. The default NIO2 behavior is used: the completion handler will be called as soon as some data has been read, even if the read has completed inline.

Type Parameters:

A - The attachment type

Parameters:

timeout - timeout duration for the read

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

handler - to call when the IO is complete

dsts - buffers

Returns:

the completion state (done, done inline, or still pending)

read

public final <A> SocketWrapperBase.CompletionState read(SocketWrapperBase.BlockingMode block,
                                                        long timeout,
                                                        TimeUnit unit,
                                                        A attachment,
                                                        SocketWrapperBase.CompletionCheck check,
                                                        CompletionHandler<Long,? super A> handler,
                                                        ByteBuffer... dsts)

Scatter read. The completion handler will be called once some data has been read or an error occurred. If a CompletionCheck object has been provided, the completion handler will only be called if the callHandler method returned true. If no CompletionCheck object has been provided, the default NIO2 behavior is used: the completion handler will be called as soon as some data has been read, even if the read has completed inline.

Type Parameters:

A - The attachment type

Parameters:

block - is the blocking mode that will be used for this operation

timeout - timeout duration for the read

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

check - for the IO operation completion

handler - to call when the IO is complete

dsts - buffers

Returns:

the completion state (done, done inline, or still pending)

read

public final <A> SocketWrapperBase.CompletionState read(ByteBuffer[] dsts,
                                                        int offset,
                                                        int length,
                                                        SocketWrapperBase.BlockingMode block,
                                                        long timeout,
                                                        TimeUnit unit,
                                                        A attachment,
                                                        SocketWrapperBase.CompletionCheck check,
                                                        CompletionHandler<Long,? super A> handler)

Scatter read. The completion handler will be called once some data has been read or an error occurred. If a CompletionCheck object has been provided, the completion handler will only be called if the callHandler method returned true. If no CompletionCheck object has been provided, the default NIO2 behavior is used: the completion handler will be called as soon as some data has been read, even if the read has completed inline.

Type Parameters:

A - The attachment type

Parameters:

dsts - buffers

offset - in the buffer array

length - in the buffer array

block - is the blocking mode that will be used for this operation

timeout - timeout duration for the read

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

check - for the IO operation completion

handler - to call when the IO is complete

Returns:

the completion state (done, done inline, or still pending)

write

public final <A> SocketWrapperBase.CompletionState write(long timeout,
                                                         TimeUnit unit,
                                                         A attachment,
                                                         CompletionHandler<Long,? super A> handler,
                                                         ByteBuffer... srcs)

Gather write. The completion handler will be called once some data has been written or an error occurred. The default NIO2 behavior is used: the completion handler will be called, even if the write is incomplete and data remains in the buffers, or if the write completed inline.

Type Parameters:

A - The attachment type

Parameters:

timeout - timeout duration for the write

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

handler - to call when the IO is complete

srcs - buffers

Returns:

the completion state (done, done inline, or still pending)

write

public final <A> SocketWrapperBase.CompletionState write(SocketWrapperBase.BlockingMode block,
                                                         long timeout,
                                                         TimeUnit unit,
                                                         A attachment,
                                                         SocketWrapperBase.CompletionCheck check,
                                                         CompletionHandler<Long,? super A> handler,
                                                         ByteBuffer... srcs)

Gather write. The completion handler will be called once some data has been written or an error occurred. If a CompletionCheck object has been provided, the completion handler will only be called if the callHandler method returned true. If no CompletionCheck object has been provided, the default NIO2 behavior is used: the completion handler will be called, even if the write is incomplete and data remains in the buffers, or if the write completed inline.

Type Parameters:

A - The attachment type

Parameters:

block - is the blocking mode that will be used for this operation

timeout - timeout duration for the write

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

check - for the IO operation completion

handler - to call when the IO is complete

srcs - buffers

Returns:

the completion state (done, done inline, or still pending)

write

public final <A> SocketWrapperBase.CompletionState write(ByteBuffer[] srcs,
                                                         int offset,
                                                         int length,
                                                         SocketWrapperBase.BlockingMode block,
                                                         long timeout,
                                                         TimeUnit unit,
                                                         A attachment,
                                                         SocketWrapperBase.CompletionCheck check,
                                                         CompletionHandler<Long,? super A> handler)

Gather write. The completion handler will be called once some data has been written or an error occurred. If a CompletionCheck object has been provided, the completion handler will only be called if the callHandler method returned true. If no CompletionCheck object has been provided, the default NIO2 behavior is used: the completion handler will be called, even if the write is incomplete and data remains in the buffers, or if the write completed inline.

Type Parameters:

A - The attachment type

Parameters:

srcs - buffers

offset - in the buffer array

length - in the buffer array

block - is the blocking mode that will be used for this operation

timeout - timeout duration for the write

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

check - for the IO operation completion

handler - to call when the IO is complete

Returns:

the completion state (done, done inline, or still pending)

vectoredOperation

protected final <A> SocketWrapperBase.CompletionState vectoredOperation(boolean read,
                                                                        ByteBuffer[] buffers,
                                                                        int offset,
                                                                        int length,
                                                                        SocketWrapperBase.BlockingMode block,
                                                                        long timeout,
                                                                        TimeUnit unit,
                                                                        A attachment,
                                                                        SocketWrapperBase.CompletionCheck check,
                                                                        CompletionHandler<Long,? super A> handler)

Vectored operation. The completion handler will be called once the operation is complete or an error occurred. If a CompletionCheck object has been provided, the completion handler will only be called if the callHandler method returned true. If no CompletionCheck object has been provided, the default NIO2 behavior is used: the completion handler will be called, even if the operation is incomplete, or if the operation completed inline.

Type Parameters:

A - The attachment type

Parameters:

read - true if the operation is a read, false if it is a write

buffers - buffers

offset - in the buffer array

length - in the buffer array

block - is the blocking mode that will be used for this operation

timeout - timeout duration for the write

unit - units for the timeout duration

attachment - an object to attach to the I/O operation that will be used when calling the completion handler

check - for the IO operation completion

handler - to call when the IO is complete

Returns:

the completion state (done, done inline, or still pending)

newOperationState

protected abstract <A> SocketWrapperBase.OperationState<A> newOperationState(boolean read,
                                                                             ByteBuffer[] buffers,
                                                                             int offset,
                                                                             int length,
                                                                             SocketWrapperBase.BlockingMode block,
                                                                             long timeout,
                                                                             TimeUnit unit,
                                                                             A attachment,
                                                                             SocketWrapperBase.CompletionCheck check,
                                                                             CompletionHandler<Long,? super A> handler,
                                                                             Semaphore semaphore,
                                                                             SocketWrapperBase.VectoredIOCompletionHandler<A> completion)

transfer

protected static int transfer(byte[] from,
                              int offset,
                              int length,
                              ByteBuffer to)

transfer

protected static int transfer(ByteBuffer from,
                              ByteBuffer to)

buffersArrayHasRemaining

protected static boolean buffersArrayHasRemaining(ByteBuffer[] buffers,
                                                  int offset,
                                                  int length)