/**
* Opens an asynchronous server-socket channel.
*
* <p>The new channel is created by invoking the {@link
* AsynchronousChannelProvider#openAsynchronousServerSocketChannel
* openAsynchronousServerSocketChannel} method on the {@link AsynchronousChannelProvider} object
* that created the given group. If the group parameter is {@code null} then the resulting channel
* is created by the system-wide default provider, and bound to the <em>default group</em>.
*
* @param group the group to which the newly constructed channel should be bound, or {@code null}
* for the default group
* @return a new asynchronous server socket channel
* @throws ShutdownChannelGroupException the specified group is shutdown
* @throws IOException if an I/O error occurs
*/
public static AsynchronousServerSocketChannel open(AsynchronousChannelGroup group)
throws IOException {
return AsynchronousChannelProvider.provider().openAsynchronousServerSocketChannel(group);
}
/**
* Constructs an instance of this class with the specified properties.
*
* @param properties service properties
* @param systemRegistry system registry
* @param txnProxy transaction proxy
* @throws Exception if a problem occurs when creating the service
*/
public ClientSessionServiceImpl(
Properties properties, ComponentRegistry systemRegistry, TransactionProxy txnProxy)
throws Exception {
super(properties, systemRegistry, txnProxy, logger);
logger.log(Level.CONFIG, "Creating ClientSessionServiceImpl properties:{0}", properties);
PropertiesWrapper wrappedProps = new PropertiesWrapper(properties);
try {
appPort = wrappedProps.getRequiredIntProperty(StandardProperties.APP_PORT, 1, 65535);
/*
* Get the property for controlling session event processing.
*/
eventsPerTxn =
wrappedProps.getIntProperty(
EVENTS_PER_TXN_PROPERTY, DEFAULT_EVENTS_PER_TXN, 1, Integer.MAX_VALUE);
readBufferSize =
wrappedProps.getIntProperty(
READ_BUFFER_SIZE_PROPERTY, DEFAULT_READ_BUFFER_SIZE, 8192, Integer.MAX_VALUE);
writeBufferSize =
wrappedProps.getIntProperty(
WRITE_BUFFER_SIZE_PROPERTY, DEFAULT_WRITE_BUFFER_SIZE, 8192, Integer.MAX_VALUE);
/*
* Export the ClientSessionServer.
*/
int serverPort =
wrappedProps.getIntProperty(SERVER_PORT_PROPERTY, DEFAULT_SERVER_PORT, 0, 65535);
serverImpl = new SessionServerImpl();
exporter = new Exporter<ClientSessionServer>(ClientSessionServer.class);
try {
int port = exporter.export(serverImpl, serverPort);
serverProxy = exporter.getProxy();
if (logger.isLoggable(Level.CONFIG)) {
logger.log(Level.CONFIG, "export successful. port:{0,number,#}", port);
}
} catch (Exception e) {
try {
exporter.unexport();
} catch (RuntimeException re) {
}
throw e;
}
/*
* Get services and initialize service-related and other
* instance fields.
*/
identityManager = systemRegistry.getComponent(IdentityCoordinator.class);
flushContextsThread.start();
contextFactory = new ContextFactory(txnProxy);
watchdogService = txnProxy.getService(WatchdogService.class);
nodeMapService = txnProxy.getService(NodeMappingService.class);
taskService = txnProxy.getService(TaskService.class);
localNodeId = watchdogService.getLocalNodeId();
watchdogService.addRecoveryListener(new ClientSessionServiceRecoveryListener());
int acceptorBacklog =
wrappedProps.getIntProperty(ACCEPTOR_BACKLOG_PROPERTY, DEFAULT_ACCEPTOR_BACKLOG);
/*
* Check service version.
*/
transactionScheduler.runTask(
new AbstractKernelRunnable() {
public void run() {
checkServiceVersion(VERSION_KEY, MAJOR_VERSION, MINOR_VERSION);
}
},
taskOwner);
/*
* Store the ClientSessionServer proxy in the data store.
*/
transactionScheduler.runTask(
new AbstractKernelRunnable() {
public void run() {
dataService.setServiceBinding(
getClientSessionServerKey(localNodeId),
new ManagedSerializable<ClientSessionServer>(serverProxy));
}
},
taskOwner);
/*
* Listen for incoming client connections.
*/
InetSocketAddress listenAddress = new InetSocketAddress(appPort);
AsynchronousChannelProvider provider =
// TODO fetch from config
AsynchronousChannelProvider.provider();
asyncChannelGroup =
// TODO fetch from config
provider.openAsynchronousChannelGroup(Executors.newCachedThreadPool());
acceptor = provider.openAsynchronousServerSocketChannel(asyncChannelGroup);
try {
acceptor.bind(listenAddress, acceptorBacklog);
if (logger.isLoggable(Level.CONFIG)) {
logger.log(Level.CONFIG, "bound to port:{0,number,#}", getListenPort());
}
} catch (Exception e) {
logger.logThrow(Level.WARNING, e, "acceptor failed to listen on {0}", listenAddress);
try {
acceptor.close();
} catch (IOException ioe) {
logger.logThrow(Level.WARNING, ioe, "problem closing acceptor");
}
throw e;
}
// TBD: listen for UNRELIABLE connections as well?
} catch (Exception e) {
if (logger.isLoggable(Level.CONFIG)) {
logger.logThrow(Level.CONFIG, e, "Failed to create ClientSessionServiceImpl");
}
doShutdown();
throw e;
}
}