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 androidx.test.services.shellexecutor;
  
  import android.content.Context;
  import android.os.Handler;
  import android.os.Looper;
  import android.util.Log;
  import androidx.test.services.speakeasy.SpeakEasyProtocol.FindResult;
  import androidx.test.services.speakeasy.client.AppConnection;
  import androidx.test.services.speakeasy.client.Connection;
  import androidx.test.services.speakeasy.client.FindResultReceiver;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Synchronously gets a {@link FindResult} from SpeakEasy
   *
   * @throws InterruptedException if find not successful in 5 seconds.
   */
  final class BlockingFind extends FindResultReceiver {
  
    private static final String TAG = "FindResultReceiver";
    private static final int WAIT_TIME = 30;
    private static final int WAIT_INTERVAL = 5;
  
    private final CountDownLatch latch;
    private volatile FindResult findResult;
  
    private BlockingFind(Handler h) {
      super(h);
      latch = new CountDownLatch(1);
    }
  
    @Override
    protected void handleFindResult(FindResult findResult) {
      this.findResult = findResult;
      latch.countDown();
    }
  
    private FindResult waitOnResult() throws InterruptedException {
      int awaitTime = 0;
      while (true) {
        if (latch.await(WAIT_INTERVAL, TimeUnit.SECONDS)) {
          return findResult;
        } else {
          awaitTime += WAIT_INTERVAL;
          if (awaitTime < WAIT_TIME) {
            Log.i(TAG, "Waiting " + awaitTime + " for SpeakEasy find");
          } else {
            throw new InterruptedException(
                "Timed out after " + WAIT_TIME + " seconds while waiting for SpeakEasy find");
          }
        }
      }
    }
  
    public static FindResult getResult(Looper looper, Context context, String key)
        throws InterruptedException {
      BlockingFind receiver = new BlockingFind(new Handler(looper));
      Connection connection = new AppConnection(context);
      connection.find(key, receiver);
      return receiver.waitOnResult();
    }
  };
  