Move Eclipse E4 components from Argeo Commons to Argeo SLC

[gpl/argeo-slc.git] / swt / org.argeo.cms.e4 / src / org / argeo / cms / e4 / PrivilegedJob.java

diff --git a/swt/org.argeo.cms.e4/src/org/argeo/cms/e4/PrivilegedJob.java b/swt/org.argeo.cms.e4/src/org/argeo/cms/e4/PrivilegedJob.java
new file mode 100644 (file)
index 0000000..89055d2
--- /dev/null
+++ b/swt/org.argeo.cms.e4/src/org/argeo/cms/e4/PrivilegedJob.java
@@ -0,0 +1,49 @@
+package org.argeo.cms.e4;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import javax.security.auth.Subject;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.jobs.Job;
+
+/**
+ * Propagate authentication to an eclipse job. Typically to execute a privileged
+ * action outside the UI thread
+ */
+public abstract class PrivilegedJob extends Job {
+       private final Subject subject;
+
+       public PrivilegedJob(String jobName) {
+               this(jobName, AccessController.getContext());
+       }
+
+       public PrivilegedJob(String jobName,
+                       AccessControlContext accessControlContext) {
+               super(jobName);
+               subject = Subject.getSubject(accessControlContext);
+
+               // Must be called *before* the job is scheduled,
+               // it is required for the progress window to appear
+               setUser(true);
+       }
+
+       @Override
+       protected IStatus run(final IProgressMonitor progressMonitor) {
+               PrivilegedAction<IStatus> privilegedAction = new PrivilegedAction<IStatus>() {
+                       public IStatus run() {
+                               return doRun(progressMonitor);
+                       }
+               };
+               return Subject.doAs(subject, privilegedAction);
+       }
+
+       /**
+        * Implement here what should be executed with default context
+        * authentication
+        */
+       protected abstract IStatus doRun(IProgressMonitor progressMonitor);
+}