Class NIOService
Common usage is to create a single instance of this service and then run one other the select methods in a loop.
Use openSocket(String, int)
to open a socket to a remote server,
and openServerSocket(int)
to open a server socket locally.
Note that the NIOServerSocket by default opens in a "refuse connections" state. To start accepting players, the socket's acceptor must first be set to accept connections. See documentation for openServerSocket for more details.
Example use:
Using the server socket:
NIOService service = new NIOService; NIOServerSocket serverSocket = service.openServerSocket(1234); serverSocket.setConnectionAcceptor(myAcceptor); serverSocket.listen(myObserver);Using regular sockets:
NIOService service = new NIOService; NIOSocket socket = service.openSocket("www.google.com", 1234); socket.listen(myObserver); // Asynchronous write by default: socket.write("Some message".getBytes());
- Author:
- Christoffer Lerno
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Field Summary
Fields -
Constructor Summary
ConstructorsConstructorDescriptionCreate a new nio service with default buffer size (64kb)NIOService
(int ioBufferSize) Create a new nio service. -
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Close the entire service.int
Returns the new shared buffer size.getQueue()
Returns a copy of the internal event queue.boolean
isOpen()
Determine if this service is open.void
Logs an exception using the exception observer.openServerSocket
(int port) Open a server socket on the given port with the default connection backlog.openServerSocket
(int port, int backlog) Open a server socket on the given port.openServerSocket
(InetSocketAddress address, int backlog) Open a server socket on the address.openSocket
(String host, int port) Open a normal socket to the host on the given port returning a NIOSocket.openSocket
(InetAddress inetAddress, int port) Open a normal socket to the host on the given port returning a NIOSocket.openSSLServerSocket
(SSLContext sslContext, int port) Open an SSL server socket on the given port with the default connection backlog.openSSLServerSocket
(SSLContext sslContext, int port, int backlog) Open an SSL server socket on the given port.openSSLServerSocket
(SSLContext sslContext, InetSocketAddress address, int backlog) Open an SSL server socket on the address.openSSLSocket
(SSLEngine sslEngine, String host, int port) Open a socket to the host on the given port returning a NIOSocketSSL.openSSLSocket
(SSLEngine sslEngine, InetAddress inetAddress, int port) Open a socket to the host on the given port returning a NIOSocketSSL.void
Queues an event on the NIOService queue.void
Run all waiting NIO requests, blocking indefinitely until at least one request is handled.void
selectBlocking
(long timeout) Run all waiting NIO requests, blocking until at least one request is found, or the method has blocked for the time given by the timeout value, whatever comes first.void
Run all waiting NIO requests, returning immediately if no requests are found.void
setBufferSize
(int newBufferSize) Set the new shared buffer size.void
setExceptionObserver
(ExceptionObserver exceptionObserver) Updates the exception observer for the NIOService.void
wakeup()
Runs wakeup on the selector, causing any blocking select to be released.
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Field Details
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DEFAULT_IO_BUFFER_SIZE
public static final int DEFAULT_IO_BUFFER_SIZE- See Also:
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Constructor Details
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NIOService
Create a new nio service with default buffer size (64kb)- Throws:
IOException
- if we failed to open the underlying selector used by the service.
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NIOService
Create a new nio service.- Parameters:
ioBufferSize
- the maximum buffer size.- Throws:
IOException
- if we failed to open the underlying selector used by the service.IllegalArgumentException
- if the buffer size is less than 256 bytes.
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Method Details
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selectBlocking
Run all waiting NIO requests, blocking indefinitely until at least one request is handled.- Throws:
IOException
- if there is an IO error waiting for requests.ClosedSelectorException
- if the underlying selector is closed (in this case, NIOService#isOpen will return false)
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selectNonBlocking
Run all waiting NIO requests, returning immediately if no requests are found.- Throws:
IOException
- if there is an IO error waiting for requests.ClosedSelectorException
- if the underlying selector is closed. (in this case, NIOService#isOpen will return false)
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selectBlocking
Run all waiting NIO requests, blocking until at least one request is found, or the method has blocked for the time given by the timeout value, whatever comes first.- Parameters:
timeout
- the maximum time to wait for requests.- Throws:
IllegalArgumentException
- If the value of the timeout argument is negative.IOException
- if there is an IO error waiting for requests.ClosedSelectorException
- if the underlying selector is closed. (in this case, NIOService#isOpen will return false)
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openSocket
Open a normal socket to the host on the given port returning a NIOSocket.This roughly corresponds to creating a regular socket using new Socket(host, port).
This method is thread-safe.
- Parameters:
host
- the host we want to connect to.port
- the port to use for the connection.- Returns:
- a NIOSocket object for asynchronous communication.
- Throws:
IOException
- if registering the new socket failed.
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openSSLSocket
Open a socket to the host on the given port returning a NIOSocketSSL.This roughly corresponds to creating a regular socket using new SSLSocket(host, port).
This method is thread-safe.
- Parameters:
sslEngine
- the SSL engine to use for SSL-negotiation.host
- the host we want to connect to.port
- the port to use for the connection.- Returns:
- a NIOSocket object for asynchronous communication.
- Throws:
IOException
- if registering the new socket failed.
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openSocket
Open a normal socket to the host on the given port returning a NIOSocket.This roughly corresponds to creating a regular socket using new Socket(inetAddress, port).
This method is thread-safe.
- Parameters:
inetAddress
- the address we want to connect to.port
- the port to use for the connection.- Returns:
- a NIOSocket object for asynchronous communication.
- Throws:
IOException
- if registering the new socket failed.
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openSSLSocket
public NIOSocketSSL openSSLSocket(SSLEngine sslEngine, InetAddress inetAddress, int port) throws IOException Open a socket to the host on the given port returning a NIOSocketSSL.This roughly corresponds to creating a regular socket using new SSLSocket(inetAddress, port).
This method is thread-safe.
- Parameters:
sslEngine
- the SSL engine to use for SSL-negotiation.inetAddress
- the address we want to connect to.port
- the port to use for the connection.- Returns:
- a NIOSocketSSL object for asynchronous communication.
- Throws:
IOException
- if registering the new socket failed.
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openServerSocket
Open a server socket on the given port.This roughly corresponds to using new ServerSocket(port, backlog);
This method is thread-safe.
- Parameters:
port
- the port to open.backlog
- the maximum connection backlog (i.e. connections pending accept)- Returns:
- a NIOServerSocket for asynchronous connection to the server socket.
- Throws:
IOException
- if registering the socket fails.
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openSSLServerSocket
public NIOServerSocketSSL openSSLServerSocket(SSLContext sslContext, int port, int backlog) throws IOException Open an SSL server socket on the given port.This roughly corresponds to using new SSLServerSocket(port, backlog);
This method is thread-safe.
- Parameters:
sslContext
- the SSLContext to use for SSL-negotiation.port
- the port to open.backlog
- the maximum connection backlog (i.e. connections pending accept)- Returns:
- a NIOServerSocket for asynchronous connection to the server socket.
- Throws:
IOException
- if registering the socket fails.
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openServerSocket
Open a server socket on the given port with the default connection backlog.This roughly corresponds to using new ServerSocket(port);
This method is thread-safe.
- Parameters:
port
- the port to open.- Returns:
- a NIOServerSocket for asynchronous connection to the server socket.
- Throws:
IOException
- if registering the socket fails.
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openSSLServerSocket
Open an SSL server socket on the given port with the default connection backlog.This roughly corresponds to using new SSLServerSocket(port);
This method is thread-safe.
- Parameters:
sslContext
- the SSLContext to use for SSL-negotiation.port
- the port to open.- Returns:
- a NIOServerSocket for asynchronous connection to the server socket.
- Throws:
IOException
- if registering the socket fails.
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openSSLServerSocket
public NIOServerSocketSSL openSSLServerSocket(SSLContext sslContext, InetSocketAddress address, int backlog) throws IOException Open an SSL server socket on the address.This method is thread-safe.
- Parameters:
sslContext
- the SSLContext to use for SSL-negotiation.address
- the address to open.backlog
- the maximum connection backlog (i.e. connections pending accept)- Returns:
- a NIOServerSocket for asynchronous connection to the server socket.
- Throws:
IOException
- if registering the socket fails.
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openServerSocket
Open a server socket on the address.This method is thread-safe.
- Parameters:
address
- the address to open.backlog
- the maximum connection backlog (i.e. connections pending accept)- Returns:
- a NIOServerSocket for asynchronous connection to the server socket.
- Throws:
IOException
- if registering the socket fails.
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setBufferSize
public void setBufferSize(int newBufferSize) Set the new shared buffer size.This method is *not* thread-safe.
- Parameters:
newBufferSize
- the new buffer size.- Throws:
IllegalArgumentException
- if the new size is less than 256 bytes.
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getBufferSize
public int getBufferSize()Returns the new shared buffer size.This method is *not* thread-safe.
- Returns:
- the current buffer size, which is the largest packet that can be read.
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close
public void close()Close the entire service.This will disconnect all sockets associated with this service.
It is not possible to restart the service once closed.
This method is thread-safe.
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isOpen
public boolean isOpen()Determine if this service is open.This method is thread-safe.
- Returns:
- true if the service is open, false otherwise.
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queue
Queues an event on the NIOService queue.This method is thread-safe, but should in general not be used by other applications.
- Parameters:
event
- the event to run on the NIOService-thread.
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getQueue
Returns a copy of the internal event queue.- Returns:
- a copy of the internal event queue.
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wakeup
public void wakeup()Runs wakeup on the selector, causing any blocking select to be released. -
setExceptionObserver
Updates the exception observer for the NIOService.- Parameters:
exceptionObserver
- the new exception observer, if this is null, logging will be directed to stderr.
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notifyException
Logs an exception using the exception observer. This is mainly for use by the Naga classes.Should only be used on the NIOService thread.
- Parameters:
t
- the exception thrown.
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