Package org.apache.tomcat.util.net

Class SocketWrapperBase<E>

    • Field Detail

      • sm

        protected static final StringManager sm
        String manager for this class.

      • closed

        protected final java.util.concurrent.atomic.AtomicBoolean closed
        Indicates whether the socket has been closed.

      • previousIOException

        protected volatile java.io.IOException previousIOException
        The previous I/O exception that occurred on this socket.

      • localAddr

        protected java.lang.String localAddr
        Local address.

      • localName

        protected java.lang.String localName
        Local name.

      • localPort

        protected int localPort
        Local port.

      • remoteAddr

        protected java.lang.String remoteAddr
        Remote address.

      • remoteHost

        protected java.lang.String remoteHost
        Remote host.

      • remotePort

        protected int remotePort
        Remote port.

      • servletConnection

        protected volatile ServletConnection servletConnection
        Servlet connection.

      • sniHostName

        protected java.lang.String sniHostName
        SNI host name.

      • 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 java.util.concurrent.Semaphore readPending
        Semaphore for pending read operations.

      • writePending

        protected final java.util.concurrent.Semaphore writePending
        Semaphore for pending write operations.

      • 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)
        Creates a new socket wrapper.
        Parameters:
        socket - the socket to wrap
        endpoint - the endpoint

    • Method Detail

      • getSocket

        public E getSocket()
        Returns the wrapped socket.
        Returns:
        the socket

      • reset

        protected void reset​(E closedSocket)
        Resets the wrapped socket with a new socket instance.
        Parameters:
        closedSocket - the new socket to wrap

      • getEndpoint

        protected AbstractEndpoint<E,​?> getEndpoint()
        Returns the endpoint.
        Returns:
        the endpoint

      • getLock

        public java.util.concurrent.locks.Lock getLock()
        Returns the lock for this wrapper.
        Returns:
        the lock

      • getCurrentProcessor

        public java.lang.Object getCurrentProcessor()
        Returns the current processor.
        Returns:
        the current processor

      • setCurrentProcessor

        public void setCurrentProcessor​(java.lang.Object currentProcessor)
        Sets the current processor associated with this wrapper.
        Parameters:
        currentProcessor - the processor to associate

      • takeCurrentProcessor

        public java.lang.Object takeCurrentProcessor()
        Retrieves and clears the current processor associated with this wrapper.
        Returns:
        the previous processor, or null if none was set

      • execute

        public void execute​(java.lang.Runnable runnable)
        Transfers processing to a container thread.
        Parameters:
        runnable - The actions to process on a container thread
        Throws:
        java.util.concurrent.RejectedExecutionException - If the runnable cannot be executed

      • getError

        public java.io.IOException getError()
        Returns the first I/O error that occurred on this socket.
        Returns:
        the recorded error, or null if no error has occurred

      • setError

        public void setError​(java.io.IOException error)
        Records the first I/O error that occurs on this socket. Subsequent calls are ignored.
        Parameters:
        error - the error to record

      • checkError

        public void checkError()
                throws java.io.IOException
        Throws the recorded error if one has occurred.
        Throws:
        java.io.IOException - if an error was previously recorded

      • getNegotiatedProtocol

        public java.lang.String getNegotiatedProtocol()
        Returns the protocol negotiated for this connection.
        Returns:
        the negotiated protocol, or null if none has been negotiated

      • setNegotiatedProtocol

        public void setNegotiatedProtocol​(java.lang.String negotiatedProtocol)
        Sets the protocol negotiated for this connection.
        Parameters:
        negotiatedProtocol - the negotiated protocol

      • getSniHostName

        public java.lang.String getSniHostName()
        Returns the SNI host name.
        Returns:
        the SNI host name

      • setSniHostName

        public void setSniHostName​(java.lang.String sniHostName)
        Sets the SNI host name.
        Parameters:
        sniHostName - the SNI host name to set

      • 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()
        Returns the read timeout in milliseconds.
        Returns:
        the read timeout, or -1 for infinite timeout

      • 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()
        Returns the write timeout in milliseconds.
        Returns:
        the write timeout, or -1 for infinite timeout

      • setKeepAliveLeft

        public void setKeepAliveLeft​(int keepAliveLeft)
        Sets the number of keep-alive requests remaining.
        Parameters:
        keepAliveLeft - the number of keep-alive requests remaining

      • decrementKeepAlive

        public int decrementKeepAlive()
        Decrements the number of keep-alive requests remaining.
        Returns:
        the updated number of keep-alive requests remaining

      • getRemoteHost

        public java.lang.String getRemoteHost()
        Returns the remote host name.
        Returns:
        the remote host name

      • populateRemoteHost

        protected abstract void populateRemoteHost()
        Populates the cached remote host name from the underlying socket.

      • getRemoteAddr

        public java.lang.String getRemoteAddr()
        Returns the remote IP address.
        Returns:
        the remote IP address

      • populateRemoteAddr

        protected abstract void populateRemoteAddr()
        Populates the cached remote IP address from the underlying socket.

      • getRemotePort

        public int getRemotePort()
        Returns the remote port number.
        Returns:
        the remote port number

      • populateRemotePort

        protected abstract void populateRemotePort()
        Populates the cached remote port number from the underlying socket.

      • getLocalName

        public java.lang.String getLocalName()
        Returns the local host name.
        Returns:
        the local host name

      • populateLocalName

        protected abstract void populateLocalName()
        Populates the cached local host name from the underlying socket.

      • getLocalAddr

        public java.lang.String getLocalAddr()
        Returns the local IP address.
        Returns:
        the local IP address

      • populateLocalAddr

        protected abstract void populateLocalAddr()
        Populates the cached local IP address from the underlying socket.

      • getLocalPort

        public int getLocalPort()
        Returns the local port number.
        Returns:
        the local port number

      • populateLocalPort

        protected abstract void populateLocalPort()
        Populates the cached local port number from the underlying socket.

      • getSocketBufferHandler

        public SocketBufferHandler getSocketBufferHandler()
        Returns the socket buffer handler.
        Returns:
        the socket buffer handler

      • hasDataToRead

        public boolean hasDataToRead()
        Checks if there is data available to read from the socket.
        Returns:
        true since it is always safe to attempt a read

      • hasDataToWrite

        public boolean hasDataToWrite()
        Checks if there is data waiting to be written to the socket.
        Returns:
        true if there is pending write data

      • 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()
        Checks if the socket write buffer is writable and there is no pending non-blocking write data.
        Returns:
        true if the socket is ready for writing

      • toString

        public java.lang.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 java.lang.Object

      • read

        public abstract int read​(boolean block,
                         byte[] b,
                         int off,
                         int len)
                  throws java.io.IOException
        Reads data from the socket into a byte array.
        Parameters:
        block - Whether to block
        b - The byte array to read into
        off - The offset in the array
        len - The number of bytes to read
        Returns:
        the number of bytes read
        Throws:
        java.io.IOException - If an I/O error occurs

      • read

        public abstract int read​(boolean block,
                         java.nio.ByteBuffer to)
                  throws java.io.IOException
        Reads data from the socket into a ByteBuffer.
        Parameters:
        block - Whether to block
        to - The ByteBuffer to read into
        Returns:
        the number of bytes read
        Throws:
        java.io.IOException - If an I/O error occurs

      • isReadyForRead

        public abstract boolean isReadyForRead()
                                throws java.io.IOException
        Checks if the socket is ready for reading.
        Returns:
        true if data is available to read
        Throws:
        java.io.IOException - If an I/O error occurs

      • setAppReadBufHandler

        public abstract void setAppReadBufHandler​(ApplicationBufferHandler handler)
        Sets the application-level read buffer handler.
        Parameters:
        handler - The application buffer handler

      • populateReadBuffer

        protected int populateReadBuffer​(byte[] b,
                                 int off,
                                 int len)
        Copies available data from the internal read buffer into the provided byte array.
        Parameters:
        b - the byte array to populate
        off - the offset in the array
        len - the maximum number of bytes to copy
        Returns:
        the number of bytes copied

      • populateReadBuffer

        protected int populateReadBuffer​(java.nio.ByteBuffer to)
        Copies available data from the internal read buffer into the provided ByteBuffer.
        Parameters:
        to - the ByteBuffer to populate
        Returns:
        the number of bytes copied

      • unRead

        public void unRead​(java.nio.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()
        Checks if the socket wrapper has been closed.
        Returns:
        true if the wrapper has been closed

      • write

        public final void write​(boolean block,
                        byte[] buf,
                        int off,
                        int len)
                 throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • write

        public final void write​(boolean block,
                        java.nio.ByteBuffer from)
                 throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • writeBlocking

        protected void writeBlocking​(byte[] buf,
                             int off,
                             int len)
                      throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • writeBlocking

        protected void writeBlocking​(java.nio.ByteBuffer from)
                      throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • writeNonBlocking

        protected void writeNonBlocking​(byte[] buf,
                                int off,
                                int len)
                         throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • writeNonBlocking

        protected void writeNonBlocking​(java.nio.ByteBuffer from)
                         throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • writeNonBlockingInternal

        protected void writeNonBlockingInternal​(java.nio.ByteBuffer from)
                                 throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • flush

        public boolean flush​(boolean block)
              throws java.io.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:
        java.io.IOException - If an IO error occurs during the write

      • flushBlocking

        protected void flushBlocking()
                      throws java.io.IOException
        Writes all remaining data from the buffers and blocks until the write is complete.
        Throws:
        java.io.IOException - If an IO error occurs during the write

      • flushNonBlocking

        protected abstract boolean flushNonBlocking()
                                     throws java.io.IOException
        Flushes remaining buffered data using a non-blocking write.
        Returns:
        true if data remains to be flushed after this method completes, otherwise false
        Throws:
        java.io.IOException - If an IO error occurs during the write

      • doWrite

        protected void doWrite​(boolean block)
                throws java.io.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:
        java.io.IOException - If an I/O error such as a timeout occurs during the write

      • doWrite

        protected abstract void doWrite​(boolean block,
                                java.nio.ByteBuffer from)
                         throws java.io.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:
        java.io.IOException - If an I/O error such as a timeout occurs during the write

      • processSocket

        public void processSocket​(SocketEvent socketStatus,
                          boolean dispatch)
        Processes a socket event.
        Parameters:
        socketStatus - The socket event status
        dispatch - Whether to dispatch to a worker thread

      • registerReadInterest

        public abstract void registerReadInterest()
        Registers interest in read events.

      • registerWriteInterest

        public abstract void registerWriteInterest()
        Registers interest in write events.

      • createSendfileData

        public abstract SendfileDataBase createSendfileData​(java.lang.String filename,
                                                    long pos,
                                                    long length)
        Creates a sendfile data object for the specified file.
        Parameters:
        filename - The file to send
        pos - The starting position in the file
        length - The number of bytes to send
        Returns:
        a new sendfile data object

      • 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 java.io.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:
        java.io.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

        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

      • read

        public final <A> SocketWrapperBase.CompletionState read​(long timeout,
                                                        java.util.concurrent.TimeUnit unit,
                                                        A attachment,
                                                        java.nio.channels.CompletionHandler<java.lang.Long,​? super A> handler,
                                                        java.nio.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,
                                                        java.util.concurrent.TimeUnit unit,
                                                        A attachment,
                                                        SocketWrapperBase.CompletionCheck check,
                                                        java.nio.channels.CompletionHandler<java.lang.Long,​? super A> handler,
                                                        java.nio.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​(java.nio.ByteBuffer[] dsts,
                                                        int offset,
                                                        int length,
                                                        SocketWrapperBase.BlockingMode block,
                                                        long timeout,
                                                        java.util.concurrent.TimeUnit unit,
                                                        A attachment,
                                                        SocketWrapperBase.CompletionCheck check,
                                                        java.nio.channels.CompletionHandler<java.lang.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,
                                                         java.util.concurrent.TimeUnit unit,
                                                         A attachment,
                                                         java.nio.channels.CompletionHandler<java.lang.Long,​? super A> handler,
                                                         java.nio.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,
                                                         java.util.concurrent.TimeUnit unit,
                                                         A attachment,
                                                         SocketWrapperBase.CompletionCheck check,
                                                         java.nio.channels.CompletionHandler<java.lang.Long,​? super A> handler,
                                                         java.nio.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​(java.nio.ByteBuffer[] srcs,
                                                         int offset,
                                                         int length,
                                                         SocketWrapperBase.BlockingMode block,
                                                         long timeout,
                                                         java.util.concurrent.TimeUnit unit,
                                                         A attachment,
                                                         SocketWrapperBase.CompletionCheck check,
                                                         java.nio.channels.CompletionHandler<java.lang.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,
                                                                        java.nio.ByteBuffer[] buffers,
                                                                        int offset,
                                                                        int length,
                                                                        SocketWrapperBase.BlockingMode block,
                                                                        long timeout,
                                                                        java.util.concurrent.TimeUnit unit,
                                                                        A attachment,
                                                                        SocketWrapperBase.CompletionCheck check,
                                                                        java.nio.channels.CompletionHandler<java.lang.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,
                                                                             java.nio.ByteBuffer[] buffers,
                                                                             int offset,
                                                                             int length,
                                                                             SocketWrapperBase.BlockingMode block,
                                                                             long timeout,
                                                                             java.util.concurrent.TimeUnit unit,
                                                                             A attachment,
                                                                             SocketWrapperBase.CompletionCheck check,
                                                                             java.nio.channels.CompletionHandler<java.lang.Long,​? super A> handler,
                                                                             java.util.concurrent.Semaphore semaphore,
                                                                             SocketWrapperBase.VectoredIOCompletionHandler<A> completion)
        Creates a new operation state for vectored I/O operations.
        Type Parameters:
        A - The attachment type
        Parameters:
        read - Whether this is a read operation
        buffers - The buffers for the operation
        offset - The offset in the buffer array
        length - The number of buffers
        block - The blocking mode
        timeout - The timeout duration
        unit - The timeout time unit
        attachment - An attachment object
        check - The completion check
        handler - The completion handler
        semaphore - The semaphore for synchronization
        completion - The vectored I/O completion handler
        Returns:
        a new operation state instance

      • transfer

        protected static int transfer​(byte[] from,
                              int offset,
                              int length,
                              java.nio.ByteBuffer to)
        Transfers data from a byte array into a ByteBuffer.
        Parameters:
        from - the source byte array
        offset - the offset in the source array
        length - the maximum number of bytes to transfer
        to - the destination ByteBuffer
        Returns:
        the number of bytes transferred

      • transfer

        protected static int transfer​(java.nio.ByteBuffer from,
                              java.nio.ByteBuffer to)
        Transfers data from one ByteBuffer to another.
        Parameters:
        from - the source ByteBuffer
        to - the destination ByteBuffer
        Returns:
        the number of bytes transferred

      • buffersArrayHasRemaining

        protected static boolean buffersArrayHasRemaining​(java.nio.ByteBuffer[] buffers,
                                                  int offset,
                                                  int length)
        Checks if any buffer in the specified range has remaining capacity.
        Parameters:
        buffers - the array of ByteBuffers
        offset - the starting index in the array
        length - the number of buffers to check
        Returns:
        true if any buffer has remaining capacity

      • getServletConnection

        public ServletConnection getServletConnection​(java.lang.String protocol,
                                              java.lang.String protocolConnectionId)
        Returns the ServletConnection for this socket, creating it if necessary.
        Parameters:
        protocol - the protocol name
        protocolConnectionId - the protocol-level connection ID
        Returns:
        the ServletConnection instance