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package org.glassfish.grizzly.samples.ssl;

import java.io.IOException;
import java.net.URL;
import java.nio.charset.Charset;

import org.glassfish.grizzly.filterchain.FilterChainBuilder;
import org.glassfish.grizzly.filterchain.TransportFilter;
import org.glassfish.grizzly.nio.transport.TCPNIOTransport;
import org.glassfish.grizzly.nio.transport.TCPNIOTransportBuilder;
import org.glassfish.grizzly.samples.echo.EchoFilter;
import org.glassfish.grizzly.ssl.SSLContextConfigurator;
import org.glassfish.grizzly.ssl.SSLEngineConfigurator;
import org.glassfish.grizzly.ssl.SSLFilter;
import org.glassfish.grizzly.utils.StringFilter;

/**
 * Class initializes and starts the SSL echo server, based on Grizzly 2.0
 * We use the {@link EchoFilter} from echo example.
 *
 * @see SSLFilter
 * @see SSLContextConfigurator
 * @see SSLEngineConfigurator
 *
 * @author Alexey Stashok
 */
public class SSLEchoServer extends Thread{
    public static final String HOST = "localhost";
    public static final int PORT = 7777;
    final TCPNIOTransport transport;
    
    public SSLEchoServer() throws IOException {
        // Create a FilterChain using FilterChainBuilder
        FilterChainBuilder filterChainBuilder = FilterChainBuilder.stateless();
        // Add TransportFilter, which is responsible
        // for reading and writing data to the connection
        filterChainBuilder.add(new TransportFilter());

        // Initialize and add SSLFilter
        final SSLEngineConfigurator serverConfig = initializeSSL();
        final SSLEngineConfigurator clientConfig = serverConfig.copy().setClientMode(true);

        filterChainBuilder.add(new SSLFilter(serverConfig, clientConfig));

        // Add StringFilter, which will be responsible for Buffer <-> String transformation
        filterChainBuilder.add(new StringFilter(Charset.forName("UTF-8"),"\r\n"));

        // Use the plain EchoFilter
        filterChainBuilder.add(new EchoFilter());


        // Create TCP transport
        transport =
                TCPNIOTransportBuilder.newInstance().build();
        transport.setProcessor(filterChainBuilder.build());


    
    }
    
    @Override
	public void run() {
        try {
            transport.bind(HOST, PORT);

            // start the transport
            transport.start();
            
        	synchronized (this) {
            	wait();	
			}

            // binding transport to start listen on certain host and port
          
//            System.out.println("Press any key to stop the server...");
//            System.in.read();
        } catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
            System.out.println("Stopping transport...");
            // stop the transport
            try {
				transport.shutdownNow();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

            System.out.println("Stopped transport...");
        }
	}

    public void stopServer()
    {
    	synchronized (this) {
    		notify();
		}
    	
    }
    
	/**
     * Initialize server side SSL configuration.
     * 
     * @return server side {@link SSLEngineConfigurator}.
     */
    private static SSLEngineConfigurator initializeSSL() {
        // Initialize SSLContext configuration
        SSLContextConfigurator sslContextConfig = new SSLContextConfigurator();

        // Set key store
        ClassLoader cl = SSLEchoServer.class.getClassLoader();
        URL cacertsUrl = cl.getResource("ssltest-cacerts.jks");
        if (cacertsUrl != null) {
            sslContextConfig.setTrustStoreFile(cacertsUrl.getFile());
            sslContextConfig.setTrustStorePass("changeit");
        }

        // Set trust store
        URL keystoreUrl = cl.getResource("ssltest-keystore.jks");
        if (keystoreUrl != null) {
            sslContextConfig.setKeyStoreFile(keystoreUrl.getFile());
            sslContextConfig.setKeyStorePass("changeit");
        }


        // Create SSLEngine configurator
        return new SSLEngineConfigurator(sslContextConfig.createSSLContext(),
                false, false, false);
    }
}
