Merge "Add utility class to inspect Guice wiring"

gerrit-pgm/src/main/java/com/google/gerrit/pgm/util/GuiceLogger.java

@@ -0,0 +1,54 @@
+// Copyright (C) 2013 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.pgm.util;
+
+import java.util.logging.Formatter;
+import java.util.logging.Handler;
+import java.util.logging.Level;
+import java.util.logging.LogRecord;
+import java.util.logging.Logger;
+import java.util.logging.StreamHandler;
+
+public class GuiceLogger {
+  private static final Handler HANDLER;
+  static {
+    HANDLER = new StreamHandler(System.out, new Formatter() {
+      public String format(LogRecord record) {
+        return String.format("[Guice %s] %s%n", record.getLevel().getName(),
+            record.getMessage());
+      }
+    });
+    HANDLER.setLevel(Level.ALL);
+  }
+
+  private GuiceLogger() {
+  }
+
+  public static Logger getLogger() {
+    return Logger.getLogger("com.google.inject");
+  }
+
+  public static void enable() {
+    Logger guiceLogger = getLogger();
+    guiceLogger.addHandler(GuiceLogger.HANDLER);
+    guiceLogger.setLevel(Level.ALL);
+  }
+
+  public static void disable() {
+    Logger guiceLogger = getLogger();
+    guiceLogger.setLevel(Level.OFF);
+    guiceLogger.removeHandler(GuiceLogger.HANDLER);
+  }
+}