content: /*
   * Copyright (C) 2017 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.android.server.backup.restore;
  
  import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicInteger;
  
  /**
   * Restore infrastructure.
   */
  public abstract class RestoreEngine {
  
      private static final String TAG = "RestoreEngine";
  
      public static final int SUCCESS = 0;
      public static final int TARGET_FAILURE = -2;
      public static final int TRANSPORT_FAILURE = -3;
  
      private final AtomicBoolean mRunning = new AtomicBoolean(false);
      private final AtomicInteger mResult = new AtomicInteger(SUCCESS);
  
      public boolean isRunning() {
          return mRunning.get();
      }
  
      public void setRunning(boolean stillRunning) {
          synchronized (mRunning) {
              mRunning.set(stillRunning);
              mRunning.notifyAll();
          }
      }
  
      public int waitForResult() {
          synchronized (mRunning) {
              while (isRunning()) {
                  try {
                      mRunning.wait();
                  } catch (InterruptedException e) {
                  }
              }
          }
          return getResult();
      }
  
      public int getResult() {
          return mResult.get();
      }
  
      public void setResult(int result) {
          mResult.set(result);
      }
  
      // TODO: abstract restore state and APIs
  }
  