Move all GarbageCollection bindings into the same module

Also move the GarbageCollectionLogFile class in the same package as the
other classes binded in that module.

Change-Id: I2ca9e097b51181509d9773d9fbf299ed26dc4330

gerrit-server/src/main/java/com/google/gerrit/server/git/GarbageCollectionLogFile.java

@@ -0,0 +1,58 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.git;
+
+import com.google.gerrit.common.Die;
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.gerrit.server.config.SitePaths;
+import com.google.gerrit.server.util.SystemLog;
+import com.google.inject.Inject;
+
+import org.apache.log4j.LogManager;
+import org.apache.log4j.Logger;
+import org.apache.log4j.PatternLayout;
+
+import java.io.File;
+
+public class GarbageCollectionLogFile implements LifecycleListener {
+
+  @Inject
+  public GarbageCollectionLogFile(SitePaths sitePaths) {
+    File logdir = sitePaths.logs_dir;
+    if (!logdir.exists() && !logdir.mkdirs()) {
+      throw new Die("Cannot create log directory: " + logdir);
+    }
+    if (SystemLog.shouldConfigure()) {
+      initLogSystem(logdir);
+    }
+  }
+
+  @Override
+  public void start() {
+  }
+
+  @Override
+  public void stop() {
+    LogManager.getLogger(GarbageCollection.LOG_NAME).removeAllAppenders();
+  }
+
+  private static void initLogSystem(File logdir) {
+    Logger gcLogger = LogManager.getLogger(GarbageCollection.LOG_NAME);
+    gcLogger.removeAllAppenders();
+    gcLogger.addAppender(SystemLog.createAppender(logdir,
+        GarbageCollection.LOG_NAME, new PatternLayout("[%d] %-5p %x: %m%n")));
+    gcLogger.setAdditivity(false);
+  }
+}