Examples with RouterHandler org.apache.flink.runtime.rest.handler.router.RouterHandler used on opensource projects

Example 1 with RouterHandler

use of org.apache.flink.runtime.rest.handler.router.RouterHandler in project flink by apache.

the class RestServerEndpoint method start.

/**
 * Starts this REST server endpoint.
 *
 * @throws Exception if we cannot start the RestServerEndpoint
 */
public final void start() throws Exception {
    synchronized (lock) {
        Preconditions.checkState(state == State.CREATED, "The RestServerEndpoint cannot be restarted.");
        log.info("Starting rest endpoint.");
        final Router router = new Router();
        final CompletableFuture<String> restAddressFuture = new CompletableFuture<>();
        handlers = initializeHandlers(restAddressFuture);
        /* sort the handlers such that they are ordered the following:
             * /jobs
             * /jobs/overview
             * /jobs/:jobid
             * /jobs/:jobid/config
             * /:*
             */
        Collections.sort(handlers, RestHandlerUrlComparator.INSTANCE);
        checkAllEndpointsAndHandlersAreUnique(handlers);
        handlers.forEach(handler -> registerHandler(router, handler, log));
        ChannelInitializer<SocketChannel> initializer = new ChannelInitializer<SocketChannel>() {

            @Override
            protected void initChannel(SocketChannel ch) throws ConfigurationException {
                RouterHandler handler = new RouterHandler(router, responseHeaders);
                // SSL should be the first handler in the pipeline
                if (isHttpsEnabled()) {
                    ch.pipeline().addLast("ssl", new RedirectingSslHandler(restAddress, restAddressFuture, sslHandlerFactory));
                }
                ch.pipeline().addLast(new HttpServerCodec()).addLast(new FileUploadHandler(uploadDir)).addLast(new FlinkHttpObjectAggregator(maxContentLength, responseHeaders));
                for (InboundChannelHandlerFactory factory : inboundChannelHandlerFactories) {
                    Optional<ChannelHandler> channelHandler = factory.createHandler(configuration, responseHeaders);
                    if (channelHandler.isPresent()) {
                        ch.pipeline().addLast(channelHandler.get());
                    }
                }
                ch.pipeline().addLast(new ChunkedWriteHandler()).addLast(handler.getName(), handler).addLast(new PipelineErrorHandler(log, responseHeaders));
            }
        };
        NioEventLoopGroup bossGroup = new NioEventLoopGroup(1, new ExecutorThreadFactory("flink-rest-server-netty-boss"));
        NioEventLoopGroup workerGroup = new NioEventLoopGroup(0, new ExecutorThreadFactory("flink-rest-server-netty-worker"));
        bootstrap = new ServerBootstrap();
        bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(initializer);
        Iterator<Integer> portsIterator;
        try {
            portsIterator = NetUtils.getPortRangeFromString(restBindPortRange);
        } catch (IllegalConfigurationException e) {
            throw e;
        } catch (Exception e) {
            throw new IllegalArgumentException("Invalid port range definition: " + restBindPortRange);
        }
        int chosenPort = 0;
        while (portsIterator.hasNext()) {
            try {
                chosenPort = portsIterator.next();
                final ChannelFuture channel;
                if (restBindAddress == null) {
                    channel = bootstrap.bind(chosenPort);
                } else {
                    channel = bootstrap.bind(restBindAddress, chosenPort);
                }
                serverChannel = channel.syncUninterruptibly().channel();
                break;
            } catch (final Exception e) {
                // otherwise
                if (!(e instanceof java.net.BindException)) {
                    throw e;
                }
            }
        }
        if (serverChannel == null) {
            throw new BindException("Could not start rest endpoint on any port in port range " + restBindPortRange);
        }
        log.debug("Binding rest endpoint to {}:{}.", restBindAddress, chosenPort);
        final InetSocketAddress bindAddress = (InetSocketAddress) serverChannel.localAddress();
        final String advertisedAddress;
        if (bindAddress.getAddress().isAnyLocalAddress()) {
            advertisedAddress = this.restAddress;
        } else {
            advertisedAddress = bindAddress.getAddress().getHostAddress();
        }
        port = bindAddress.getPort();
        log.info("Rest endpoint listening at {}:{}", advertisedAddress, port);
        restBaseUrl = new URL(determineProtocol(), advertisedAddress, port, "").toString();
        restAddressFuture.complete(restBaseUrl);
        state = State.RUNNING;
        startInternal();
    }
}