001/*
002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Stephane Lacoin <slacoin@nuxeo.com>
016 *     Vladimir Pasquier <vpasquier@nuxeo.com>
017 */
018package org.nuxeo.automation.scripting.internals;
019
020import javax.script.ScriptEngineFactory;
021import javax.script.ScriptEngineManager;
022
023import org.apache.commons.logging.Log;
024import org.apache.commons.logging.LogFactory;
025import org.nuxeo.automation.scripting.api.AutomationScriptingConstants;
026import org.nuxeo.runtime.api.Framework;
027
028/**
029 * This factory configures the Nashorn engine and register it following the JVM version.
030 *
031 * @since 7.3
032 */
033public class ScriptingFactory {
034
035    private static final Log log = LogFactory.getLog(ScriptingFactory.class);
036
037    protected ScriptEngineManager scriptEngineManager = new ScriptEngineManager();
038
039    protected void install() {
040        scriptEngineManager.registerEngineName(AutomationScriptingConstants.NX_NASHORN, newFactory());
041    }
042
043    protected ScriptEngineFactory newFactory() {
044        String version = Framework.getProperty("java.version", "1.8");
045        // Check if jdk8
046        if (version.contains(AutomationScriptingConstants.NASHORN_JAVA_VERSION)) {
047            // Check if version < jdk8u25 -> no cache.
048            if (version.compareTo(AutomationScriptingConstants.COMPLIANT_JAVA_VERSION_CACHE) < 0) {
049                log.warn(AutomationScriptingConstants.NASHORN_WARN_CACHE);
050                return new ScriptingCache(false);
051                // Check if jdk8u25 <= version < jdk8u40 -> only cache.
052            } else if (version.compareTo(AutomationScriptingConstants.COMPLIANT_JAVA_VERSION_CACHE) >= 0
053                    && version.compareTo(AutomationScriptingConstants.COMPLIANT_JAVA_VERSION_CLASS_FILTER) < 0) {
054                if (Boolean.valueOf(Framework.getProperty(AutomationScriptingConstants.AUTOMATION_SCRIPTING_PRECOMPILE,
055                        AutomationScriptingConstants.DEFAULT_PRECOMPILE_STATUS))) {
056                    log.warn(AutomationScriptingConstants.NASHORN_WARN_CLASS_FILTER);
057                    return new ScriptingCache(true);
058                } else {
059                    log.warn(AutomationScriptingConstants.NASHORN_WARN_CLASS_FILTER);
060                    return new ScriptingCache(false);
061                }
062                // Check if version >= jdk8u40 -> cache + class filter
063            } else if (version.compareTo(AutomationScriptingConstants.COMPLIANT_JAVA_VERSION_CLASS_FILTER) >= 0) {
064                try {
065                    if (Boolean.valueOf(Framework.getProperty(
066                            AutomationScriptingConstants.AUTOMATION_SCRIPTING_PRECOMPILE,
067                            AutomationScriptingConstants.DEFAULT_PRECOMPILE_STATUS))) {
068                        return new ScriptingCacheClassFilter(true);
069                    } else {
070                        return new ScriptingCacheClassFilter(false);
071                    }
072                } catch (NoClassDefFoundError cause) {
073                    log.warn(AutomationScriptingConstants.NASHORN_WARN_CLASS_FILTER);
074                    return new ScriptingCache(true);
075                }
076            }
077        }
078        log.warn(AutomationScriptingConstants.NASHORN_WARN_VERSION);
079        throw new UnsupportedOperationException();
080    }
081}