spring StartupTimeline 源码
springboot StartupTimeline 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/metrics/buffering/StartupTimeline.java
/*
* Copyright 2002-2021 the original author or authors.
*
* 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
*
* https://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.springframework.boot.context.metrics.buffering;
import java.time.Duration;
import java.time.Instant;
import java.util.Collections;
import java.util.List;
import org.springframework.core.metrics.StartupStep;
/**
* Represent the timeline of {@link StartupStep steps} recorded by
* {@link BufferingApplicationStartup}. Each {@link TimelineEvent} has a start and end
* time as well as a duration measured with nanosecond precision.
*
* @author Brian Clozel
* @since 2.4.0
*/
public class StartupTimeline {
private final Instant startTime;
private final List<TimelineEvent> events;
StartupTimeline(Instant startTime, List<TimelineEvent> events) {
this.startTime = startTime;
this.events = Collections.unmodifiableList(events);
}
/**
* Return the start time of this timeline.
* @return the start time
*/
public Instant getStartTime() {
return this.startTime;
}
/**
* Return the recorded events.
* @return the events
*/
public List<TimelineEvent> getEvents() {
return this.events;
}
/**
* Event on the current {@link StartupTimeline}. Each event has a start/end time, a
* precise duration and the complete {@link StartupStep} information associated with
* it.
*/
public static class TimelineEvent {
private final BufferedStartupStep step;
private final Instant endTime;
private final Duration duration;
TimelineEvent(BufferedStartupStep step, Instant endTime) {
this.step = step;
this.endTime = endTime;
this.duration = Duration.between(step.getStartTime(), endTime);
}
/**
* Return the start time of this event.
* @return the start time
*/
public Instant getStartTime() {
return this.step.getStartTime();
}
/**
* Return the end time of this event.
* @return the end time
*/
public Instant getEndTime() {
return this.endTime;
}
/**
* Return the duration of this event, i.e. the processing time of the associated
* {@link StartupStep} with nanoseconds precision.
* @return the event duration
*/
public Duration getDuration() {
return this.duration;
}
/**
* Return the {@link StartupStep} information for this event.
* @return the step information.
*/
public StartupStep getStartupStep() {
return this.step;
}
}
}
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- 本文标签： Spring Boot Java Spring