kafka SystemTime 源码
kafka SystemTime 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/utils/SystemTime.java
/*
* 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.kafka.common.utils;
import org.apache.kafka.common.errors.TimeoutException;
import java.util.function.Supplier;
/**
* A time implementation that uses the system clock and sleep call. Use `Time.SYSTEM` instead of creating an instance
* of this class.
*/
public class SystemTime implements Time {
@Override
public long milliseconds() {
return System.currentTimeMillis();
}
@Override
public long nanoseconds() {
return System.nanoTime();
}
@Override
public void sleep(long ms) {
Utils.sleep(ms);
}
@Override
public void waitObject(Object obj, Supplier<Boolean> condition, long deadlineMs) throws InterruptedException {
synchronized (obj) {
while (true) {
if (condition.get())
return;
long currentTimeMs = milliseconds();
if (currentTimeMs >= deadlineMs)
throw new TimeoutException("Condition not satisfied before deadline");
obj.wait(deadlineMs - currentTimeMs);
}
}
}
}
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