spring ApplicationStartup 源码
spring ApplicationStartup 代码
文件路径：/spring-core/src/main/java/org/springframework/core/metrics/ApplicationStartup.java
/*
* Copyright 2002-2020 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.core.metrics;
/**
* Instruments the application startup phase using {@link StartupStep steps}.
* <p>The core container and its infrastructure components can use the {@code ApplicationStartup}
* to mark steps during the application startup and collect data about the execution context
* or their processing time.
*
* @author Brian Clozel
* @since 5.3
*/
public interface ApplicationStartup {
/**
* Default "no op" {@code ApplicationStartup} implementation.
* <p>This variant is designed for minimal overhead and does not record data.
*/
ApplicationStartup DEFAULT = new DefaultApplicationStartup();
/**
* Create a new step and marks its beginning.
* <p>A step name describes the current action or phase. This technical
* name should be "." namespaced and can be reused to describe other instances of
* the same step during application startup.
* @param name the step name
*/
StartupStep start(String name);
}
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