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 * 
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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 * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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package com.sun.grizzly.standalone;

import com.sun.grizzly.arp.DefaultAsyncHandler;
import com.sun.grizzly.http.SelectorThread;
import com.sun.grizzly.jruby.JRubyGrizzlyConfigImpl;
import com.sun.grizzly.jruby.RackGrizzlyAdapter;
import org.glassfish.scripting.jruby.common.config.JRubyConfig;

import java.io.IOException;
import java.util.Properties;
import java.util.logging.Level;

/**
 * JRuby on rails implementation of Grizzly SelectorThread
 *
 * @author TAKAI Naoto
 * @author Jeanfrancois Arcand
 * @author Pramod Gopinath
 * @author Vivek Pandey
 */
public class RailsSelectorThread extends SelectorThread {

    private final static String NUMBER_OF_RUNTIME =
            "com.sun.grizzly.rails.numberOfRuntime";

    private String jrubyHome;

    private int numberOfRuntime = 1;
    private int maxRt = -1;
    private int minRt = -1; 

    private String railsRoot = null;

    public String getRailsRoot() {
        return railsRoot;
    }

    @Override
    public void initEndpoint() throws IOException, InstantiationException {
        setupSystemProperties();
        asyncExecution = true;
        RubyRuntimeAsyncFilter asyncFilter = new RubyRuntimeAsyncFilter();
        Properties props = new Properties();
        props.setProperty(JRubyConfig.JRUBY_HOME, jrubyHome);
        props.setProperty(JRubyConfig.JRUBY_RUNTIME, String.valueOf(numberOfRuntime));
        props.setProperty(JRubyConfig.JRUBY_RUNTIME_MIN, String.valueOf(minRt));
        props.setProperty(JRubyConfig.JRUBY_RUNTIME_MAX, String.valueOf(maxRt));
        JRubyGrizzlyConfigImpl config = new JRubyGrizzlyConfigImpl(new JRubyConfigImpl(props, railsRoot, railsRoot, "/", logger));
        adapter = new RackGrizzlyAdapter(config, asyncExecution);

        setWebAppRootPath(railsRoot + "/public");
        setBufferResponse(false);

        DefaultAsyncHandler asyncHandler = new DefaultAsyncHandler();
        setAsyncHandler(asyncHandler);
        asyncHandler.addAsyncFilter(asyncFilter);

        algorithmClassName = StaticStreamAlgorithm.class.getName();
        super.initEndpoint();
    }

    public void setNumberOfRuntime(int numberOfRuntime) {
        this.numberOfRuntime = numberOfRuntime;
    }

    public void setRailsRoot(String railsRoot) {
        this.railsRoot = railsRoot;
    }

    @Override
    public synchronized void stopEndpoint() {
        ((RackGrizzlyAdapter) adapter).destroy();
        super.stopEndpoint();
    }

    protected void setupSystemProperties() {
        jrubyHome = System.getenv().get("JRUBY_HOME");
        if (jrubyHome == null)
            jrubyHome = System.getProperty(JRubyConfig.JRUBY_HOME);

        if (System.getProperty(NUMBER_OF_RUNTIME) != null) {
            try {
                numberOfRuntime = Integer.parseInt(
                        System.getProperty(NUMBER_OF_RUNTIME));
            } catch (NumberFormatException ex) {
                SelectorThread.logger().log(Level.WARNING,
                        "Invalid number of Runtime: " + System.getProperty(NUMBER_OF_RUNTIME));
            }
        }

        //TODO: provide CLI options for max/min runtimes
        if (System.getProperty("jruby.runtime.max") != null) {
            try {
                maxRt = Integer.parseInt(System.getProperty("jruby.runtime.max"));
            } catch (NumberFormatException ex) {
                SelectorThread.logger().log(Level.WARNING,
                        "Invalid number of max runtime: " + System.getProperty("jruby.runtime.max"));
            }
        }
        if (System.getProperty("jruby.runtime.min") != null) {
             try {
                 minRt = Integer.parseInt(System.getProperty("jruby.runtime.min"));
             } catch (NumberFormatException ex) {
                 SelectorThread.logger().log(Level.WARNING,
                         "Invalid number of min runtime: " + System.getProperty("jruby.runtime.min"));
             }
         }
    }
}