com.l2jfree.gameserver.scripting.CompiledScriptCache.java Source code

Introduction

Here is the source code for com.l2jfree.gameserver.scripting.CompiledScriptCache.java

Source

/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jfree.gameserver.scripting;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Map;

import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.ScriptEngine;
import javax.script.ScriptException;

import javolution.util.FastMap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Cache of Compiled Scripts
 * 
 * @author  KenM
 */
public class CompiledScriptCache implements Serializable {
    /**
     * Version 1
     */
    private static final long serialVersionUID = 1L;

    private static final Log _log = LogFactory.getLog(CompiledScriptCache.class);

    private final Map<String, CompiledScriptHolder> _compiledScriptCache = new FastMap<String, CompiledScriptHolder>();
    private transient boolean _modified = false;

    public CompiledScript loadCompiledScript(ScriptEngine engine, File file)
            throws FileNotFoundException, ScriptException {
        int len = L2ScriptEngineManager.SCRIPT_FOLDER.getPath().length() + 1;
        String relativeName = file.getPath().substring(len);

        CompiledScriptHolder csh = _compiledScriptCache.get(relativeName);
        if (csh != null && csh.matches(file)) {
            if (_log.isDebugEnabled())
                _log.info("Reusing cached compiled script: " + file);
            return csh.getCompiledScript();
        }

        if (_log.isDebugEnabled())
            _log.info("Compiling script: " + file);
        Compilable eng = (Compilable) engine;
        BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));

        // TODO lock file
        CompiledScript cs = eng.compile(reader);
        if (cs instanceof Serializable) {
            synchronized (_compiledScriptCache) {
                _compiledScriptCache.put(relativeName, new CompiledScriptHolder(cs, file));
                _modified = true;
            }
        }
        return cs;
    }

    public boolean isModified() {
        return _modified;
    }

    public void purge() {
        synchronized (_compiledScriptCache) {
            for (String path : _compiledScriptCache.keySet()) {
                File file = new File(L2ScriptEngineManager.SCRIPT_FOLDER, path);
                if (!file.isFile()) {
                    _compiledScriptCache.remove(path);
                    _modified = true;
                }
            }
        }
    }

    public void save() throws IOException {
        synchronized (_compiledScriptCache) {
            ObjectOutputStream oos = new ObjectOutputStream(
                    new FileOutputStream(new File(L2ScriptEngineManager.SCRIPT_FOLDER, "CompiledScripts.cache")));
            oos.writeObject(this);
            _modified = false;
        }
    }
}