Added org.simantics.ui.workspace.tracker for tracking workspace size

[simantics/platform.git] / bundles / org.simantics.ui.workspace.tracker / src / org / simantics / ui / workspace / tracker / internal / Activator.java

diff --git a/bundles/org.simantics.ui.workspace.tracker/src/org/simantics/ui/workspace/tracker/internal/Activator.java b/bundles/org.simantics.ui.workspace.tracker/src/org/simantics/ui/workspace/tracker/internal/Activator.java
new file mode 100644 (file)
index 0000000..23d593c
--- /dev/null
+++ b/bundles/org.simantics.ui.workspace.tracker/src/org/simantics/ui/workspace/tracker/internal/Activator.java
@@ -0,0 +1,69 @@
+package org.simantics.ui.workspace.tracker.internal;
+
+import org.eclipse.core.runtime.preferences.InstanceScope;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.ui.preferences.ScopedPreferenceStore;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.util.tracker.ServiceTracker;
+import org.simantics.filesystem.services.sizetracker.DirectorySizeService;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.31.0
+ */
+public class Activator implements BundleActivator {
+
+       private static Activator instance;
+       private static BundleContext context;
+       private ServiceTracker<DirectorySizeService, DirectorySizeService> tracker;
+       private IPreferenceStore preferenceStore;
+
+       static BundleContext getContext() {
+               return context;
+       }
+
+       /*
+        * (non-Javadoc)
+        * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
+        */
+       public void start(BundleContext bundleContext) throws Exception {
+               Activator.instance = this;
+               Activator.context = bundleContext;
+               tracker = new ServiceTracker<>(bundleContext, DirectorySizeService.class, null);
+               tracker.open();
+       }
+
+       /*
+        * (non-Javadoc)
+        * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
+        */
+       public void stop(BundleContext bundleContext) throws Exception {
+               tracker.close();
+               Activator.context = null;
+               Activator.instance = null;
+       }
+
+       /**
+        * @return <code>null</code> if service is no longer available
+        */
+       public DirectorySizeService getDirectorySizeService() {
+               return tracker.getService();
+       }
+
+       public BundleContext getBundleContext() {
+               return context;
+       }
+
+       public IPreferenceStore getPreferenceStore() {
+               if (preferenceStore == null) {
+                       preferenceStore = new ScopedPreferenceStore(InstanceScope.INSTANCE, context.getBundle().getSymbolicName());
+               }
+               return preferenceStore;
+       }
+
+       public static Activator getDefault() {
+               return instance;
+       }
+
+}