spring cloud bootstrap

  spring-cloud-context

单独使用SpringBoot，发现其中的bootstrap.properties文件不会生效。

经过源码查看原来是因为SpringBoot本身并不支持，需要Spring Cloud才能生效。

而具体的代码又在spring-cloud-context包中的org.springframework.cloud.bootstrap.BootstrapApplicationListener实现

 

ApplicationListener

order越小，越前

ConfigFileApplicationListener

int HIGHEST_PRECEDENCE = Integer.MIN_VALUE;

public static final int DEFAULT_ORDER = Ordered.HIGHEST_PRECEDENCE + 10;

// -2147483638
private int order = DEFAULT_ORDER;

 

BootstrapApplicationListener

public static final int DEFAULT_ORDER = Ordered.HIGHEST_PRECEDENCE + 5;

//  -21474836343
private int order = DEFAULT_ORDER;

 

sping.factories

# Application Listeners
org.springframework.context.ApplicationListener=\
org.springframework.cloud.bootstrap.BootstrapApplicationListener,\
org.springframework.cloud.bootstrap.LoggingSystemShutdownListener,\
org.springframework.cloud.context.restart.RestartListener

 

bootstrap.properties

org.springframework.cloud.bootstrap.BootstrapApplicationListener

 

 

public static final String BOOTSTRAP_PROPERTY_SOURCE_NAME = "bootstrap";

String configName = environment
				.resolvePlaceholders("${spring.cloud.bootstrap.name:bootstrap}");



Map<String, Object> bootstrapMap = new HashMap<>();
bootstrapMap.put("spring.config.name", configName);

# 那怕配置spring.cloud.bootstrap.name，这里也是bootstarp
bootstrapProperties.addFirst(
				new MapPropertySource(BOOTSTRAP_PROPERTY_SOURCE_NAME, bootstrapMap));

其他属性

String configLocation = environment
				.resolvePlaceholders("${spring.cloud.bootstrap.location:}");
String configAdditionalLocation = environment
				.resolvePlaceholders("${spring.cloud.bootstrap.additional-location:}");



# spring.cloud.bootstrap.enabled
ConfigurableEnvironment environment = event.getEnvironment();
if (!environment.getProperty("spring.cloud.bootstrap.enabled", Boolean.class,
				true)) {
    return;
}