ONOS-3200 unify code formation and fix grammar problem
Change-Id: I3feef132051e4476b2b8f2f59fb69f2776f7a7cf
diff --git a/ovsdb/ctl/src/main/java/org/onosproject/ovsdb/controller/impl/OVSDBController.java b/ovsdb/ctl/src/main/java/org/onosproject/ovsdb/controller/impl/OVSDBController.java
new file mode 100644
index 0000000..16064f3
--- /dev/null
+++ b/ovsdb/ctl/src/main/java/org/onosproject/ovsdb/controller/impl/OVSDBController.java
@@ -0,0 +1,299 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.ovsdb.controller.impl;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.buffer.PooledByteBufAllocator;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.EventLoop;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.ServerChannel;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.handler.codec.string.StringEncoder;
+import io.netty.handler.timeout.IdleState;
+import io.netty.handler.timeout.IdleStateEvent;
+import io.netty.handler.timeout.IdleStateHandler;
+import io.netty.util.CharsetUtil;
+
+import java.net.InetSocketAddress;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.TpPort;
+import org.onosproject.ovsdb.controller.OvsdbConstant;
+import org.onosproject.ovsdb.controller.OvsdbNodeId;
+import org.onosproject.ovsdb.controller.driver.DefaultOvsdbClient;
+import org.onosproject.ovsdb.controller.driver.OvsdbAgent;
+import org.onosproject.ovsdb.controller.driver.OvsdbProviderService;
+import org.onosproject.ovsdb.rfc.jsonrpc.Callback;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * The main controller class. Handles all setup and network listeners -
+ * distributed OVSDBClient.
+ */
+public class OVSDBController {
+ protected static final Logger log = LoggerFactory
+ .getLogger(OVSDBController.class);
+
+ private int ovsdbPort = OvsdbConstant.OVSDBPORT;
+
+ private OvsdbAgent agent;
+ private Callback monitorCallback;
+
+ private final ExecutorService executorService = Executors
+ .newFixedThreadPool(10);
+
+ private EventLoopGroup bossGroup;
+ private EventLoopGroup workerGroup;
+ private Class<? extends ServerChannel> serverChannelClass;
+
+ private static final int MAX_RETRY = 5;
+ private static final int IDLE_TIMEOUT_SEC = 10;
+
+ /**
+ * Initialization.
+ */
+ private void initEventLoopGroup() {
+ bossGroup = new NioEventLoopGroup();
+ workerGroup = new NioEventLoopGroup();
+ serverChannelClass = NioServerSocketChannel.class;
+ }
+
+ /**
+ * Accepts incoming connections.
+ */
+ private void startAcceptingConnections() throws InterruptedException {
+ ServerBootstrap b = new ServerBootstrap();
+
+ b.group(bossGroup, workerGroup).channel(serverChannelClass)
+ .childHandler(new OnosCommunicationChannelInitializer());
+ b.option(ChannelOption.SO_BACKLOG, 128);
+ b.option(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 32 * 1024);
+ b.option(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, 8 * 1024);
+ b.option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
+ b.childOption(ChannelOption.SO_KEEPALIVE, true);
+ b.bind(ovsdbPort).sync();
+ }
+
+ /**
+ * Tells controller that we're ready to accept OVSDB node loop.
+ * @throws InterruptedException if thread is interrupted
+ */
+ public void run() throws InterruptedException {
+ initEventLoopGroup();
+ startAcceptingConnections();
+ }
+
+ /**
+ * Adds channel pipeline to handle a new connected node.
+ */
+ private class OnosCommunicationChannelInitializer
+ extends ChannelInitializer<SocketChannel> {
+ protected void initChannel(SocketChannel channel) throws Exception {
+ log.info("New channel created");
+ channel.pipeline().addLast(new StringEncoder(CharsetUtil.UTF_8));
+ channel.pipeline().addLast(new MessageDecoder());
+ handleNewNodeConnection(channel);
+
+ }
+ }
+
+ /**
+ * Handles the new connection of node.
+ *
+ * @param channel the channel to use.
+ */
+ private void handleNewNodeConnection(final Channel channel) {
+ executorService.execute(new Runnable() {
+ @Override
+ public void run() {
+ log.info("Handle new node connection");
+
+ IpAddress ipAddress = IpAddress
+ .valueOf(((InetSocketAddress) channel.remoteAddress())
+ .getAddress().getHostAddress());
+ long port = ((InetSocketAddress) channel.remoteAddress())
+ .getPort();
+
+ log.info("Get connection from ip address {} : {}",
+ ipAddress.toString(), port);
+
+ OvsdbNodeId nodeId = new OvsdbNodeId(ipAddress, port);
+ OvsdbProviderService ovsdbProviderService = getNodeInstance(nodeId,
+ agent,
+ monitorCallback,
+ channel);
+ ovsdbProviderService.setConnection(true);
+ OvsdbJsonRpcHandler ovsdbJsonRpcHandler = new OvsdbJsonRpcHandler(
+ nodeId);
+ ovsdbJsonRpcHandler
+ .setOvsdbProviderService(ovsdbProviderService);
+ channel.pipeline().addLast(ovsdbJsonRpcHandler);
+
+ ovsdbProviderService.nodeAdded();
+ ChannelFuture closeFuture = channel.closeFuture();
+ closeFuture
+ .addListener(new ChannelConnectionListener(
+ ovsdbProviderService));
+ }
+ });
+ }
+
+ /**
+ * Gets an OVSDB client instance.
+ *
+ * @param nodeId data OVSDB node id
+ * @param agent OvsdbAgent
+ * @param monitorCallback Callback
+ * @param channel Channel
+ * @return OvsdbProviderService instance
+ */
+ protected OvsdbProviderService getNodeInstance(OvsdbNodeId nodeId,
+ OvsdbAgent agent,
+ Callback monitorCallback,
+ Channel channel) {
+ OvsdbProviderService ovsdbProviderService = new DefaultOvsdbClient(
+ nodeId);
+ ovsdbProviderService.setAgent(agent);
+ ovsdbProviderService.setCallback(monitorCallback);
+ ovsdbProviderService.setChannel(channel);
+ return ovsdbProviderService;
+ }
+
+ /**
+ * Starts controller.
+ *
+ * @param agent OvsdbAgent
+ * @param monitorCallback Callback
+ */
+ public void start(OvsdbAgent agent, Callback monitorCallback) {
+ this.agent = agent;
+ this.monitorCallback = monitorCallback;
+ try {
+ this.run();
+ } catch (InterruptedException e) {
+ log.warn("Interrupted while waiting to start");
+ Thread.currentThread().interrupt();
+ }
+ }
+
+ /**
+ * Stops controller.
+ *
+ */
+ public void stop() {
+ workerGroup.shutdownGracefully();
+ bossGroup.shutdownGracefully();
+ }
+
+ /**
+ * Connect to the ovsdb server with given ip address and port number.
+ *
+ * @param ip ip address
+ * @param port port number
+ */
+ public void connect(IpAddress ip, TpPort port) {
+ ChannelFutureListener listener = new ConnectionListener(this, ip, port);
+ connectRetry(ip, port, listener);
+ }
+
+ private void connectRetry(IpAddress ip, TpPort port, ChannelFutureListener listener) {
+ try {
+ Bootstrap b = new Bootstrap();
+ b.group(workerGroup)
+ .channel(NioSocketChannel.class)
+ .option(ChannelOption.TCP_NODELAY, true)
+ .handler(new ChannelInitializer<SocketChannel>() {
+
+ @Override
+ protected void initChannel(SocketChannel channel) throws Exception {
+ ChannelPipeline p = channel.pipeline();
+ p.addLast(new MessageDecoder(),
+ new StringEncoder(CharsetUtil.UTF_8),
+ new IdleStateHandler(IDLE_TIMEOUT_SEC, 0, 0),
+ new ConnectionHandler());
+ }
+ });
+ b.remoteAddress(ip.toString(), port.toInt());
+ b.connect().addListener(listener);
+ } catch (Exception e) {
+ log.warn("Connection to the ovsdb server {}:{} failed", ip.toString(), port.toString());
+ }
+ }
+
+ private class ConnectionListener implements ChannelFutureListener {
+ private OVSDBController controller;
+ private IpAddress ip;
+ private TpPort port;
+ private AtomicInteger count = new AtomicInteger();
+
+ public ConnectionListener(OVSDBController controller,
+ IpAddress ip,
+ TpPort port) {
+ this.controller = controller;
+ this.ip = ip;
+ this.port = port;
+ }
+
+ @Override
+ public void operationComplete(ChannelFuture channelFuture) throws Exception {
+ if (!channelFuture.isSuccess()) {
+ channelFuture.channel().close();
+
+ if (count.incrementAndGet() < MAX_RETRY) {
+ final EventLoop loop = channelFuture.channel().eventLoop();
+
+ loop.schedule(() -> {
+ controller.connectRetry(this.ip, this.port, this);
+ }, 1L, TimeUnit.SECONDS);
+ } else {
+ log.info("Connection to the ovsdb {}:{} failed",
+ this.ip.toString(), this.port.toString());
+ }
+ } else {
+ handleNewNodeConnection(channelFuture.channel());
+ }
+ }
+ }
+
+ private class ConnectionHandler extends ChannelDuplexHandler {
+
+ @Override
+ public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+ IdleStateEvent e = (IdleStateEvent) evt;
+
+ if (e.state() == IdleState.READER_IDLE) {
+ ctx.close();
+ }
+ }
+ }
+}