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Commit 291ea34

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add application context initializer code
1 parent d5cc691 commit 291ea34

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6 files changed

+131
-1
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6 files changed

+131
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lines changed

‎springboot-source-code-analysis/pom.xml‎

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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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</dependencies>
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<build>

‎springboot-source-code-analysis/src/main/java/com/example/springboot/source/code/analysis/SpringbootSourceCodeAnalysisApplication.java‎

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@@ -9,5 +9,4 @@ public class SpringbootSourceCodeAnalysisApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringbootSourceCodeAnalysisApplication.class, args);
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}
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}
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package com.example.springboot.source.code.analysis.controller;
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import com.example.springboot.source.code.analysis.service.TestFirstInitializerService;
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import com.fasterxml.jackson.annotation.JacksonAnnotationsInside;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.*;
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/**
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* InitializerController 测试框架初始化器 ApplicationContextInitializer
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*
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* @author ipipman
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* @version V1.0
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* @date 2021年6月5日
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* @date 2021年6月5日 8:45 下午
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*/
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@RequestMapping("/initializer")
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@RestController
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public class InitializerController {
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/**
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* 测试框架初始化器 ApplicationContextInitializer
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*/
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@Autowired
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private TestFirstInitializerService firstInitializerService;
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/**
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* 测试框架初始化器 ApplicationContextInitializer
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*/
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@RequestMapping(value = "first", method = RequestMethod.GET)
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@ResponseBody
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public String testFirstInitializer(){
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return firstInitializerService.getCustomEnvironmentProperty();
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}
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}
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package com.example.springboot.source.code.analysis.initializer;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.context.ApplicationContextInitializer;
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import org.springframework.context.ConfigurableApplicationContext;
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import org.springframework.core.annotation.Order;
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import org.springframework.core.env.ConfigurableEnvironment;
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import org.springframework.core.env.MapPropertySource;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* FirstInitializer 系统初始化器
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*
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* @author ipipman
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* @version V1.0
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* @date 2021年6月5日
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* @date 2021年6月5日 8:20 下午
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*/
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@Order(1) // 设置执行顺序
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public class FirstInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
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private static final Logger logger = LoggerFactory.getLogger(FirstInitializer.class);
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@Override
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public void initialize(ConfigurableApplicationContext configurableApplicationContext) {
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// 获取系统属性
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ConfigurableEnvironment environment =
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configurableApplicationContext.getEnvironment();
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// 设置自定义属性
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Map<String, Object> attributeMap = new HashMap<>();
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attributeMap.put("key1", "value1");
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// 添加自定义属性
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MapPropertySource mapPropertySource = new MapPropertySource("firstInitializer", attributeMap);
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environment.getPropertySources().addLast(mapPropertySource);
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logger.info("设置框架初始化器【ApplicationContextInitializer】成功 : run firstInitializer");
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}
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}
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package com.example.springboot.source.code.analysis.service;
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import com.sun.istack.internal.NotNull;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.BeansException;
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import org.springframework.context.ApplicationContext;
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import org.springframework.context.ApplicationContextAware;
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import org.springframework.lang.NonNull;
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import org.springframework.lang.Nullable;
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import org.springframework.stereotype.Component;
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import java.util.Optional;
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/**
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* 测试框架初始化器,获取自定义的环境属性
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*
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* @author ipipman
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* @version V1.0
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* @date 2021年6月5日
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* @date 2021年6月5日 8:35 下午
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*/
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@Component
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public class TestFirstInitializerService implements ApplicationContextAware {
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private static final Logger logger = LoggerFactory.getLogger(TestFirstInitializerService.class);
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/**
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* 框架应用上下文
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*/
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private ApplicationContext applicationContext;
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/**
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* 获取当前框架上下文
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*/
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@Override
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public void setApplicationContext(@Nullable ApplicationContext applicationContext) throws BeansException {
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this.applicationContext = applicationContext;
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}
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/**
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* 获取在框架初始化器阶段设置的配置信息
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*/
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public String getCustomEnvironmentProperty() {
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return Optional.ofNullable(applicationContext.getEnvironment().getProperty("key1")).orElse(null);
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}
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}
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#通过系统初始化器,设置自定义环境配置
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org.springframework.context.ApplicationContextInitializer=\
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com.example.springboot.source.code.analysis.initializer.FirstInitializer
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