diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/AbstractPluginBackend.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/AbstractPluginBackend.java
index 3a7a5c6cec..2b0c473d8f 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/AbstractPluginBackend.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/AbstractPluginBackend.java
@@ -42,6 +42,9 @@ import sonia.scm.util.Util;
 import java.io.File;
 
 import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
 
 /**
  *
@@ -50,6 +53,30 @@ import java.util.Arrays;
 public abstract class AbstractPluginBackend implements PluginBackend
 {
 
+  /**
+   *   Method description
+   *
+   *
+   *   @param listener
+   */
+  @Override
+  public void addListener(PluginBackendListener listener)
+  {
+    listenerSet.add(listener);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param listeners
+   */
+  @Override
+  public void addListeners(Collection<PluginBackendListener> listeners)
+  {
+    listenerSet.addAll(listeners);
+  }
+
   /**
    * Method description
    *
@@ -79,4 +106,37 @@ public abstract class AbstractPluginBackend implements PluginBackend
       addScannedFiles(Arrays.asList(scannedFiles));
     }
   }
+
+  /**
+   * Method description
+   *
+   *
+   * @param listener
+   */
+  @Override
+  public void removeListener(PluginBackendListener listener)
+  {
+    listenerSet.remove(listener);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param plugins
+   */
+  protected void fireEvent(Collection<PluginInformation> plugins)
+  {
+    for (PluginBackendListener listener : listenerSet)
+    {
+      listener.addedNewPlugins(plugins);
+    }
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Set<PluginBackendListener> listenerSet =
+    new HashSet<PluginBackendListener>();
 }
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/DefaultPluginBackend.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/DefaultPluginBackend.java
index 00e18fbc6d..076f6c6d88 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/DefaultPluginBackend.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/DefaultPluginBackend.java
@@ -158,6 +158,7 @@ public class DefaultPluginBackend extends AbstractPluginBackend
 
       if (changed)
       {
+        fireEvent(plugins);
         store();
       }
     }
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackend.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackend.java
index efb60de413..e1c2b521f8 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackend.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackend.java
@@ -33,6 +33,10 @@
 
 package sonia.scm.plugin;
 
+//~--- non-JDK imports --------------------------------------------------------
+
+import sonia.scm.ListenerSupport;
+
 //~--- JDK imports ------------------------------------------------------------
 
 import java.io.File;
@@ -45,7 +49,7 @@ import java.util.Set;
  *
  * @author Sebastian Sdorra
  */
-public interface PluginBackend
+public interface PluginBackend extends ListenerSupport<PluginBackendListener>
 {
 
   /**
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackendListener.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackendListener.java
new file mode 100644
index 0000000000..d5c76cbeff
--- /dev/null
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/PluginBackendListener.java
@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.plugin;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.Collection;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public interface PluginBackendListener
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @param plugins
+   */
+  public void addedNewPlugins(Collection<PluginInformation> plugins);
+}
diff --git a/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginResource.java b/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginResource.java
index 10a2fe7899..5aa9ce3e05 100644
--- a/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginResource.java
+++ b/scm-plugin-backend/src/main/java/sonia/scm/plugin/rest/PluginResource.java
@@ -36,6 +36,7 @@ package sonia.scm.plugin.rest;
 //~--- non-JDK imports --------------------------------------------------------
 
 import com.google.inject.Inject;
+import com.google.inject.Singleton;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -66,6 +67,7 @@ import javax.ws.rs.core.Response;
  *
  * @author Sebastian Sdorra
  */
+@Singleton
 @Path("{version}/plugins")
 public class PluginResource
 {