src/test/java/com/googlesource/gerrit/plugins/auditsl4j/WaitForCondition.java

// Copyright (C) 2018 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.googlesource.gerrit.plugins.auditsl4j;

import com.google.common.base.Stopwatch;
import java.time.Duration;
import java.util.function.Supplier;

public interface WaitForCondition {

  public default Duration waitTimeout() {
    return Duration.ofSeconds(5);
  }

  public default Duration waitInterval() {
    return Duration.ofMillis(100);
  }

  public default boolean waitFor(Supplier<Boolean> condition) {
    Stopwatch stopwatch = Stopwatch.createStarted();
    try {
      Duration maxWait = waitTimeout();
      Duration sleep = waitInterval();
      boolean conditionSucceeded = condition.get();
      while (!conditionSucceeded && stopwatch.elapsed().compareTo(maxWait) < 0) {
        try {
          Thread.sleep(sleep.toMillis());
        } catch (InterruptedException e) {
        }
        conditionSucceeded = condition.get();
      }
      return conditionSucceeded;
    } finally {
      stopwatch.stop();
    }
  }
}