rcp/org.argeo.cms.e4.rcp/src/org/argeo/cms/e4/rcp/CmsE4Application.java

   1 package org.argeo.cms.e4.rcp;
   2
   3 import java.security.PrivilegedExceptionAction;
   4
   5 import javax.security.auth.Subject;
   6 import javax.security.auth.login.LoginContext;
   7 import javax.security.auth.login.LoginException;
   8
   9 import org.argeo.cms.CmsException;
  10 import org.argeo.cms.auth.CurrentUser;
  11 import org.argeo.cms.ui.CmsImageManager;
  12 import org.argeo.cms.ui.CmsView;
  13 import org.argeo.cms.ui.UxContext;
  14 import org.argeo.cms.util.SimpleUxContext;
  15 import org.argeo.cms.widgets.auth.CmsLoginShell;
  16 import org.argeo.node.NodeConstants;
  17 import org.eclipse.core.runtime.IConfigurationElement;
  18 import org.eclipse.core.runtime.IExtension;
  19 import org.eclipse.core.runtime.Platform;
  20 import org.eclipse.equinox.app.IApplication;
  21 import org.eclipse.equinox.app.IApplicationContext;
  22 import org.eclipse.swt.widgets.Display;
  23
  24 public class CmsE4Application implements IApplication, CmsView {
  25         private LoginContext loginContext;
  26         private IApplication e4Application;
  27         private UxContext uxContext;
  28
  29         @Override
  30         public Object start(IApplicationContext context) throws Exception {
  31                 Subject subject = new Subject();
  32                 Display display = createDisplay();
  33                 CmsLoginShell loginShell = new CmsLoginShell(this);
  34                 // TODO customize CmsLoginShell to be smaller and centered
  35                 loginShell.setSubject(subject);
  36                 try {
  37                         // try pre-auth
  38                         loginContext = new LoginContext(NodeConstants.LOGIN_CONTEXT_USER, subject, loginShell);
  39                         loginContext.login();
  40                 } catch (LoginException e) {
  41                         e.printStackTrace();
  42                         loginShell.createUi();
  43                         loginShell.open();
  44
  45                         while (!loginShell.getShell().isDisposed()) {
  46                                 if (!display.readAndDispatch())
  47                                         display.sleep();
  48                         }
  49                 }
  50                 if (CurrentUser.getUsername(getSubject()) == null)
  51                         throw new CmsException("Cannot log in");
  52
  53                 // try {
  54                 // CallbackHandler callbackHandler = new DefaultLoginDialog(
  55                 // display.getActiveShell());
  56                 // loginContext = new LoginContext(
  57                 // NodeConstants.LOGIN_CONTEXT_SINGLE_USER, subject,
  58                 // callbackHandler);
  59                 // } catch (LoginException e1) {
  60                 // throw new CmsException("Cannot initialize login context", e1);
  61                 // }
  62                 //
  63                 // // login
  64                 // try {
  65                 // loginContext.login();
  66                 // subject = loginContext.getSubject();
  67                 // } catch (LoginException e) {
  68                 // e.printStackTrace();
  69                 // display.dispose();
  70                 // try {
  71                 // Thread.sleep(2000);
  72                 // } catch (InterruptedException e1) {
  73                 // // silent
  74                 // }
  75                 // return null;
  76                 // }
  77
  78                 uxContext = new SimpleUxContext();
  79
  80                 e4Application = getApplication(null);
  81                 Object res = Subject.doAs(subject, new PrivilegedExceptionAction<Object>() {
  82
  83                         @Override
  84                         public Object run() throws Exception {
  85                                 return e4Application.start(context);
  86                         }
  87
  88                 });
  89                 return res;
  90         }
  91
  92         @Override
  93         public void stop() {
  94                 if (e4Application != null)
  95                         e4Application.stop();
  96         }
  97
  98         static IApplication getApplication(String[] args) {
  99                 IExtension extension = Platform.getExtensionRegistry().getExtension(Platform.PI_RUNTIME,
 100                                 Platform.PT_APPLICATIONS, "org.eclipse.e4.ui.workbench.swt.E4Application");
 101                 try {
 102                         IConfigurationElement[] elements = extension.getConfigurationElements();
 103                         if (elements.length > 0) {
 104                                 IConfigurationElement[] runs = elements[0].getChildren("run");
 105                                 if (runs.length > 0) {
 106                                         Object runnable;
 107                                         runnable = runs[0].createExecutableExtension("class");
 108                                         if (runnable instanceof IApplication)
 109                                                 return (IApplication) runnable;
 110                                 }
 111                         }
 112                 } catch (Exception e) {
 113                         throw new IllegalStateException("Cannot find e4 application", e);
 114                 }
 115                 throw new IllegalStateException("Cannot find e4 application");
 116         }
 117
 118         public static Display createDisplay() {
 119                 Display.setAppName("Argeo CMS RCP");
 120
 121                 // create the display
 122                 Display newDisplay = Display.getCurrent();
 123                 if (newDisplay == null) {
 124                         newDisplay = new Display();
 125                 }
 126                 // Set the priority higher than normal so as to be higher
 127                 // than the JobManager.
 128                 Thread.currentThread().setPriority(Math.min(Thread.MAX_PRIORITY, Thread.NORM_PRIORITY + 1));
 129                 return newDisplay;
 130         }
 131
 132         //
 133         // CMS VIEW
 134         //
 135
 136         @Override
 137         public UxContext getUxContext() {
 138                 return uxContext;
 139         }
 140
 141         @Override
 142         public void navigateTo(String state) {
 143                 // TODO Auto-generated method stub
 144
 145         }
 146
 147         @Override
 148         public void authChange(LoginContext loginContext) {
 149                 if (loginContext == null)
 150                         throw new CmsException("Login context cannot be null");
 151                 // logout previous login context
 152                 // if (this.loginContext != null)
 153                 // try {
 154                 // this.loginContext.logout();
 155                 // } catch (LoginException e1) {
 156                 // System.err.println("Could not log out: " + e1);
 157                 // }
 158                 this.loginContext = loginContext;
 159         }
 160
 161         @Override
 162         public void logout() {
 163                 if (loginContext == null)
 164                         throw new CmsException("Login context should not bet null");
 165                 try {
 166                         CurrentUser.logoutCmsSession(loginContext.getSubject());
 167                         loginContext.logout();
 168                 } catch (LoginException e) {
 169                         throw new CmsException("Cannot log out", e);
 170                 }
 171         }
 172
 173         @Override
 174         public void exception(Throwable e) {
 175                 // TODO Auto-generated method stub
 176
 177         }
 178
 179         @Override
 180         public CmsImageManager getImageManager() {
 181                 // TODO Auto-generated method stub
 182                 return null;
 183         }
 184
 185         protected Subject getSubject() {
 186                 return loginContext.getSubject();
 187         }
 188
 189         @Override
 190         public boolean isAnonymous() {
 191                 return CurrentUser.isAnonymous(getSubject());
 192         }
 193
 194 }