Line data    Source code

       1             : // Copyright (C) 2012 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.server.plugins;
      16             : 
      17             : import com.google.common.util.concurrent.Uninterruptibles;
      18             : import java.util.concurrent.CountDownLatch;
      19             : import java.util.concurrent.TimeUnit;
      20             : 
      21             : class PluginScannerThread extends Thread {
      22          13 :   private final CountDownLatch done = new CountDownLatch(1);
      23             :   private final PluginLoader loader;
      24             :   private final long checkFrequencyMillis;
      25             : 
      26          13 :   PluginScannerThread(PluginLoader loader, long checkFrequencyMillis) {
      27          13 :     this.loader = loader;
      28          13 :     this.checkFrequencyMillis = checkFrequencyMillis;
      29          13 :     setDaemon(true);
      30          13 :     setName("PluginScanner");
      31          13 :   }
      32             : 
      33             :   @Override
      34             :   public void run() {
      35             :     for (; ; ) {
      36             :       try {
      37           0 :         if (done.await(checkFrequencyMillis, TimeUnit.MILLISECONDS)) {
      38           0 :           return;
      39             :         }
      40           0 :       } catch (InterruptedException e) {
      41             :         // Ignored
      42           0 :       }
      43           0 :       loader.rescan();
      44             :     }
      45             :   }
      46             : 
      47             :   void end() {
      48           0 :     done.countDown();
      49           0 :     Uninterruptibles.joinUninterruptibly(this);
      50           0 :   }
      51             : }