org.argeo.cms.ui/src/org/argeo/cms/script/CmsScriptRwtApplication.java

   1 package org.argeo.cms.script;
   2
   3 import java.io.IOException;
   4 import java.io.InputStreamReader;
   5 import java.io.Reader;
   6 import java.net.URL;
   7
   8 import javax.jcr.Repository;
   9 import javax.script.ScriptEngine;
  10 import javax.script.ScriptEngineManager;
  11 import javax.script.ScriptException;
  12
  13 import org.apache.commons.logging.Log;
  14 import org.apache.commons.logging.LogFactory;
  15 import org.argeo.cms.CmsException;
  16 import org.eclipse.rap.rwt.application.Application;
  17 import org.eclipse.rap.rwt.application.ApplicationConfiguration;
  18 import org.osgi.framework.BundleContext;
  19 import org.osgi.framework.BundleException;
  20 import org.osgi.framework.wiring.BundleWiring;
  21
  22 public class CmsScriptRwtApplication implements ApplicationConfiguration {
  23         public final static String APP = "APP";
  24         public final static String BC = "BC";
  25
  26         private final Log log = LogFactory.getLog(CmsScriptRwtApplication.class);
  27
  28         BundleContext bundleContext;
  29         Repository repository;
  30
  31         ScriptEngine engine;
  32
  33         public void init(BundleContext bundleContext) {
  34                 this.bundleContext = bundleContext;
  35                 ClassLoader bundleCl = bundleContext.getBundle().adapt(BundleWiring.class).getClassLoader();
  36                 ClassLoader originalCcl = Thread.currentThread().getContextClassLoader();
  37                 try {
  38 //                      Thread.currentThread().setContextClassLoader(bundleCl);// GraalVM needs it to be before creating manager
  39 //                      ScriptEngineManager scriptEngineManager = new ScriptEngineManager(bundleCl);
  40 //                      engine = scriptEngineManager.getEngineByName("JavaScript");
  41 //                      if (engine == null) {// Nashorn
  42 //                              Thread.currentThread().setContextClassLoader(originalCcl);
  43 //                              scriptEngineManager = new ScriptEngineManager();
  44 //                              Thread.currentThread().setContextClassLoader(bundleCl);
  45 //                              engine = scriptEngineManager.getEngineByName("JavaScript");
  46 //                      }
  47                         engine = loadScriptEngine(originalCcl, bundleCl);
  48
  49                         // Load script
  50                         URL appUrl = bundleContext.getBundle().getEntry("cms/app.js");
  51                         // System.out.println("Loading " + appUrl);
  52                         // System.out.println("Loading " + appUrl.getHost());
  53                         // System.out.println("Loading " + appUrl.getPath());
  54
  55                         CmsScriptApp app = new CmsScriptApp(engine);
  56                         engine.put(APP, app);
  57                         engine.put(BC, bundleContext);
  58                         try (Reader reader = new InputStreamReader(appUrl.openStream())) {
  59                                 engine.eval(reader);
  60                         } catch (IOException | ScriptException e) {
  61                                 throw new CmsException("Cannot execute " + appUrl, e);
  62                         }
  63
  64                         if (log.isDebugEnabled())
  65                                 log.debug("CMS script app initialized from " + appUrl);
  66
  67                 } catch (Exception e) {
  68                         e.printStackTrace();
  69                 } finally {
  70                         Thread.currentThread().setContextClassLoader(originalCcl);
  71                 }
  72         }
  73
  74         public void destroy(BundleContext bundleContext) {
  75                 engine = null;
  76         }
  77
  78         @Override
  79         public void configure(Application application) {
  80                 load(application);
  81         }
  82
  83         void load(Application application) {
  84                 CmsScriptApp app = getApp();
  85                 app.apply(bundleContext, repository, application);
  86                 if (log.isDebugEnabled())
  87                         log.debug("CMS script app loaded to " + app.getWebPath());
  88         }
  89
  90         CmsScriptApp getApp() {
  91                 if (engine == null)
  92                         throw new IllegalStateException("CMS script app is not initialized");
  93                 return (CmsScriptApp) engine.get(APP);
  94         }
  95
  96         void update() {
  97
  98                 try {
  99                         bundleContext.getBundle().update();
 100                 } catch (BundleException e) {
 101                         e.printStackTrace();
 102                 }
 103         }
 104
 105         public void setRepository(Repository repository) {
 106                 this.repository = repository;
 107         }
 108
 109         private static ScriptEngine loadScriptEngine(ClassLoader originalCcl, ClassLoader bundleCl) {
 110                 Thread.currentThread().setContextClassLoader(bundleCl);// GraalVM needs it to be before creating manager
 111                 ScriptEngineManager scriptEngineManager = new ScriptEngineManager(bundleCl);
 112                 ScriptEngine engine = scriptEngineManager.getEngineByName("JavaScript");
 113                 if (engine == null) {// Nashorn
 114                         Thread.currentThread().setContextClassLoader(originalCcl);
 115                         scriptEngineManager = new ScriptEngineManager();
 116                         Thread.currentThread().setContextClassLoader(bundleCl);
 117                         engine = scriptEngineManager.getEngineByName("JavaScript");
 118                 }
 119                 return engine;
 120         }
 121 }