ServletLauncher.java

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package com.sun.grizzly.standalone.servlet;

import com.sun.grizzly.http.SelectorThread;
import com.sun.grizzly.http.servlet.ServletAdapter;
import com.sun.grizzly.standalone.StandaloneMainUtil;
import com.sun.grizzly.tcp.Adapter;
import com.sun.grizzly.tcp.StaticResourcesAdapter;
import com.sun.grizzly.util.ClassLoaderUtil;
import java.util.logging.Level;
import javax.servlet.Servlet;

/**
 * Basic startup class used when Grizzly standalone is used
 *
 * @author Jeanfrancois Arcand
 */
public class ServletLauncher extends StandaloneMainUtil {

    protected String applicationLoc;
    private String servletClassName;

    public ServletLauncher() {
    }

    public static void main(String args[]) throws Exception {
        ServletLauncher sl = new ServletLauncher();
        sl.start(args);
    }

    public void printHelpAndExit() {
        System.err.println("Usage: " + ServletLauncher.class.getCanonicalName() + " [options] Servlet_Classname");
        System.err.println();
        System.err.println("    -p, --port=port                  Runs Servlet on the specified port.");
        System.err.println("                                     Default: 8080");
        System.err.println("    -a, --apps=application path      The Servlet folder or jar or war location.");
        System.err.println("                                     Default: .");
        System.err.println("    -h, --help                       Show this help message.");
        System.exit(1);
    }

    @Override
    public boolean parseOptions(String[] args) {
        // parse options
        for (int i = 0; i < args.length - 1; i++) {
            String arg = args[i];

            if ("-h".equals(arg) || "--help".equals(arg)) {
                printHelpAndExit();
            } else if ("-a".equals(arg)) {
                i++;
                applicationLoc = args[i];
            } else if (arg.startsWith("--application=")) {
                applicationLoc = arg.substring("--application=".length(), arg.length());
            } else if ("-p".equals(arg)) {
                i++;
                setPort(args[i]);
            } else if (arg.startsWith("--port=")) {
                String num = arg.substring("--port=".length(), arg.length());
                setPort(num);
            }
        }

        if (applicationLoc == null) {
            System.err.println("Illegal War|Jar file or folder location.");
            printHelpAndExit();
        }

        servletClassName = args[args.length - 1];
        return true;
    }

    @Override
    public Adapter configureAdapter(SelectorThread st) {
        ServletAdapter adapter = new ServletAdapter();
        adapter.setRootFolder(st.getWebAppRootPath());
        adapter.setHandleStaticResources(true);

        Servlet servlet = (Servlet) ClassLoaderUtil.load(servletClassName);
        if (servlet != null) {
            System.out.println("Launching Servlet: " + servlet.getClass().getName());
            adapter.setServletInstance(servlet);
        } else {
            SelectorThread.logger().log(Level.WARNING, "Unable to load Servlet, " +
                    "Will serve only static resources");
            return new StaticResourcesAdapter(st.getWebAppRootPath());
        }

        return adapter;
    }

    @Override
    public String parseApplicationLocation(String[] args) {
        return applicationLoc;
    }
}