#873 clear repository caches, if the git default branch has changed

scm-core/src/main/java/sonia/scm/repository/ClearRepositoryCacheEvent.java

@@ -0,0 +1,64 @@
+/**
+ * Copyright (c) 2014, 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.repository;
+
+import sonia.scm.event.Event;
+
+/**
+ * Event which causes clearing of repository cache.
+ * 
+ * @author Sebastian Sdorra
+ * @since 1.50
+ */
+@Event
+public class ClearRepositoryCacheEvent {
+  
+  private final Repository repository;
+
+  /**
+   * Constructs a new instance.
+   * 
+   * @param repository repository
+   */
+  public ClearRepositoryCacheEvent(Repository repository) {
+    this.repository = repository;
+  }
+
+  /**
+   * Returns repository.
+   * 
+   * @return repository
+   */
+  public Repository getRepository() {
+    return repository;
+  }
+  
+}

scm-core/src/main/java/sonia/scm/repository/api/RepositoryServiceFactory.java

@@ -37,6 +37,7 @@ package sonia.scm.repository.api;
 
 import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
+import com.google.common.eventbus.Subscribe;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 
@@ -69,6 +70,8 @@ import sonia.scm.security.ScmSecurityException;
 //~--- JDK imports ------------------------------------------------------------
 
 import java.util.Set;
+import sonia.scm.event.ScmEventBus;
+import sonia.scm.repository.ClearRepositoryCacheEvent;
 
 /**
  * The {@link RepositoryServiceFactory} is the entrypoint of the repository api.
@@ -172,6 +175,9 @@ public final class RepositoryServiceFactory
 
     repositoryManager.addHook(cch);
     repositoryManager.addListener(cch);
+    
+    // register cache clear hook for incoming events
+    ScmEventBus.getInstance().register(cch);
   }
 
   //~--- methods --------------------------------------------------------------
@@ -345,6 +351,11 @@ public final class RepositoryServiceFactory
 
     //~--- methods ------------------------------------------------------------
 
+    @Subscribe
+    public void onEvent(ClearRepositoryCacheEvent event) {
+      clearCaches(event.getRepository().getId());
+    }
+    
     /**
      * Method description
      *