/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.beam.sdk.util;
import com.google.api.client.util.NanoClock;
import com.google.api.client.util.Sleeper;
import org.junit.rules.ExternalResource;
import org.junit.rules.TestRule;
/**
* This object quickly moves time forward based upon how much it has been asked to sleep,
* without actually sleeping, to simulate the backoff.
*/
public class FastNanoClockAndSleeper extends ExternalResource
implements NanoClock, Sleeper, TestRule {
private long fastNanoTime;
@Override
public long nanoTime() {
return fastNanoTime;
}
@Override
protected void before() throws Throwable {
fastNanoTime = SYSTEM.nanoTime();
}
@Override
public void sleep(long millis) throws InterruptedException {
fastNanoTime += millis * 1000000L;
}
}