package org.opendaylight.controller.sal.streams.websockets;
+import com.google.common.base.Preconditions;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
-
import org.opendaylight.controller.sal.streams.listeners.Notificator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
- * {@link WebSocketServer} is responsible to start and stop web socket server at
- * {@link #PORT}.
+ * {@link WebSocketServer} is responsible to start and stop web socket server
*/
public class WebSocketServer implements Runnable {
- private static final Logger logger = LoggerFactory
- .getLogger(WebSocketServer.class);
-
- public static final int PORT = 8181;
+ private static final Logger logger = LoggerFactory.getLogger(WebSocketServer.class);
+ public static final String WEBSOCKET_SERVER_CONFIG_PROPERTY = "restconf.websocket.port";
+ public static final int DEFAULT_PORT = 8181;
private EventLoopGroup bossGroup;
private EventLoopGroup workerGroup;
+ private static WebSocketServer singleton = null;
+ private int port = DEFAULT_PORT;
+
+ private WebSocketServer(int port) {
+ this.port = port;
+ }
+
+ /**
+ * Create instance of {@link WebSocketServer}
+ *
+ * @param port
+ * TCP port used for this server
+ * @return instance of {@link WebSocketServer}
+ */
+ public static WebSocketServer createInstance(int port) {
+ if (singleton != null) {
+ throw new IllegalStateException("createInstance() has already been called");
+ }
+ if (port < 1024) {
+ throw new IllegalArgumentException("Privileged port (below 1024) is not allowed");
+ }
+ singleton = new WebSocketServer(port);
+ return singleton;
+ }
+
+ /**
+ * Return websocket TCP port
+ */
+ public int getPort() {
+ return port;
+ }
+
+ /**
+ * Get instance of {@link WebSocketServer} created by {@link #createInstance(int)}
+ *
+ * @return instance of {@link WebSocketServer}
+ */
+ public static WebSocketServer getInstance() {
+ Preconditions.checkNotNull(singleton, "createInstance() must be called prior to getInstance()");
+ return singleton;
+ }
+
+ /**
+ * Destroy this already created instance
+ */
+ public static void destroyInstance() {
+ if (singleton == null) {
+ throw new IllegalStateException("createInstance() must be called prior to destroyInstance()");
+ }
+ getInstance().stop();
+ }
@Override
public void run() {
workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
- b.group(bossGroup, workerGroup)
- .channel(NioServerSocketChannel.class)
+ b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
.childHandler(new WebSocketServerInitializer());
- Channel ch = b.bind(PORT).sync().channel();
- logger.info("Web socket server started at port {}.", PORT);
+ Channel ch = b.bind(port).sync().channel();
+ logger.info("Web socket server started at port {}.", port);
ch.closeFuture().sync();
} catch (InterruptedException e) {