标签：put project command code new pac pre lower maven
/env
EnvironmentEndpoint
EnvironmentMvcEndpoint
@ActuatorGetMapping("/{name:.*}")
@ResponseBody
@HypermediaDisabled
public Object value(@PathVariable String name) {
if (!getDelegate().isEnabled()) {
// Shouldn‘t happen - MVC endpoint shouldn‘t be registered when delegate‘s
// disabled
return getDisabledResponse();
}
return new NamePatternEnvironmentFilter(this.environment).getResults(name);
}
由SpringApplication.configurePropertySources进行加载
/** * Add, remove or re-order any {@link PropertySource}s in this application‘s * environment. * @param environment this application‘s environment * @param args arguments passed to the {@code run} method * @see #configureEnvironment(ConfigurableEnvironment, String[]) */ protected void configurePropertySources(ConfigurableEnvironment environment, String[] args) { MutablePropertySources sources = environment.getPropertySources(); if (this.defaultProperties != null && !this.defaultProperties.isEmpty()) { sources.addLast( new MapPropertySource("defaultProperties", this.defaultProperties)); } if (this.addCommandLineProperties && args.length > 0) { String name = CommandLinePropertySource.COMMAND_LINE_PROPERTY_SOURCE_NAME; if (sources.contains(name)) { PropertySource<?> source = sources.get(name); CompositePropertySource composite = new CompositePropertySource(name); composite.addPropertySource(new SimpleCommandLinePropertySource( name + "-" + args.hashCode(), args)); composite.addPropertySource(source); sources.replace(name, composite); } else { sources.addFirst(new SimpleCommandLinePropertySource(args)); } } }
application.properties与bootstrap.properties同一级目录下的时候，两者都设置了 spring.application.name。
此时访问：http://localhost:8082/yang/env
获取应用程序配置属性：environment.getProperty("spring.application.name")
得到的实际是application.properties所设置的信息：yang-cloud-example
也可以这样获取当前的应用程序名称：
访问：http://localhost:8082/yang/env/spring.application.name
项目加载了两种配置文件，但实际上的ApplicationName为application.properties加载的。
这是因为：Environment ： PropertySources是1:1的关系，PropertySources中的一个PropertySource，
一旦加载了spring.application.name，之后的PropertySource就不会再去加载spring.application.name了。
即：第一个读到的spring.application.name会覆盖之后的。
如果注释掉application.properties中的spring.application.name，
启动程序后访问：http://localhost:8082/yang/env/spring.application.name
String configName = environment.resolvePlaceholders("${spring.cloud.bootstrap.name:bootstrap}");
可配置，默认bootstrap
注意：BootstrapApplicationListener的加载早于ConfigFileApplicationListener，
所以在application.properties中设置spring.cloud.bootstrap.enabled=false是没有效果的。
这是因为ConfigFileApplicationListener 的 Order = Ordered.HIGHEST_PRECEDENCE + 10 第十一位；
而 BootstrapApplicationListener 的Order=Ordered.HIGHEST_PRECEDENCE + 5第六位。
所以，如果需要设置spring.cloud.bootstrap.enabled=false，可以使用优先级更高的事务去做，例如设置在命令行参数中。
参考 BootstrapApplicationListener.java实现
public class BootstrapApplicationListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent>, Ordered { public static final String BOOTSTRAP_PROPERTY_SOURCE_NAME = "bootstrap"; public static final int DEFAULT_ORDER = Ordered.HIGHEST_PRECEDENCE + 5; public static final String DEFAULT_PROPERTIES = "defaultProperties"; private int order = DEFAULT_ORDER; @Override public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) { ConfigurableEnvironment environment = event.getEnvironment(); if (!environment.getProperty("spring.cloud.bootstrap.enabled", Boolean.class, true)) { return; } // don‘t listen to events in a bootstrap context if (environment.getPropertySources().contains(BOOTSTRAP_PROPERTY_SOURCE_NAME)) { return; } ConfigurableApplicationContext context = null; String configName = environment .resolvePlaceholders("${spring.cloud.bootstrap.name:bootstrap}"); for (ApplicationContextInitializer<?> initializer : event.getSpringApplication() .getInitializers()) { if (initializer instanceof ParentContextApplicationContextInitializer) { context = findBootstrapContext( (ParentContextApplicationContextInitializer) initializer, configName); } } if (context == null) { context = bootstrapServiceContext(environment, event.getSpringApplication(), configName); } apply(context, event.getSpringApplication(), environment); } // ignore others }
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>sun.flower</groupId> <artifactId>yang-cloud-example</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>yang-cloud-example</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8 </project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Greenwich.M1</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-config</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <repositories> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>https://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> </project>
标签：put project command code new pac pre lower maven
原文地址：https://www.cnblogs.com/yang21/p/9949332.html
