从 @value 访问从后端 java 对象加载的属性

Question

我正在编写自定义 Spring Boot 启动项目，其中我们有自己的类 VaultFactory，它根据 application.yml 文件中定义的消费者属性连接到保险库。

在自定义启动项目中，我可以读取所有秘密和相应的值。现在，我想将所有这些键/值对公开为属性源，以便消费者可以通过@value 直接访问

@Value{${some.vault.secret.name}}
private String value;

我的入门项目代码

@Configuration
@EnableConfigurationProperties(VaultConfiguration.class)
@ConditionalOnClass(VaultFactory.class)
public class VaultEnableAutoConfiguration {

    /**
     * @param vaultConfiguration
     * @return
     * @throws VaultException 
     */
    @Bean
    @ConditionalOnMissingBean
    public Vault getVaultFactoryByProperties(VaultConfiguration vaultConfiguration) throws VaultException {
        VaultFactory vaultFactory = VaultFactory.newInstance(vaultConfiguration.getVault().get("file.path"), vaultConfiguration.getVaultProperties());
        return vaultFactory.getVault("vault-01");
    }
}

@EnableConfigurationProperties(VaultConfiguration.class)
public class VaultPropertiesConfiguration {

    @Autowired
    Vault vault;

    @Bean
    public PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer(VaultConfiguration vaultConfiguration) throws VaultException {

        PropertySourcesPlaceholderConfigurer pspc = new PropertySourcesPlaceholderConfigurer();
        ConfigurableEnvironment environment = new StandardEnvironment();
        MutablePropertySources ps = environment.getPropertySources();

        pspc.setIgnoreUnresolvablePlaceholders(Boolean.TRUE);
        pspc.setIgnoreUnresolvablePlaceholders(true);
        ps.addLast(new VaultPropertySource("vaultProperties", vault));
        pspc.setPropertySources(ps);
        return pspc;
    }

}

public class VaultPropertySource extends PropertySource<Vault>{

    Vault vault;

    public VaultPropertySource(String name) {
        super(name);
    }

    public VaultPropertySource(String name, Vault vault) {
        super(name);
        this.vault = vault;
    }

    @Override
    public Object getProperty(String name) {
        try {
            return vault.getSecret(name).getValue();
        } catch (VaultException e) {
            e.printStackTrace();
        }
        return null;
    }
}

@ConfigurationProperties("platform")
public class VaultConfiguration {

    private final Map<String, String> vault = new HashMap<>();

    public Map<String, String> getVault() {
        return vault;
    }

    public Properties getVaultProperties() {
        Properties p = new Properties();
        vault.entrySet().stream().forEach( e -> p.put(e.getKey(), e.getValue()));
        return p;
    }

}

我该怎么做？基本上，如果我的启动项目中有一个键/值映射，我如何通过@value 注释使这些可用于启动应用程序？

面临多个问题：

1. VaultPropertiesConfiguration 总是首先被调用，而@EnableConfigurationProperties 和@autowired 不起作用。

2. 我进行了硬编码以解决上述问题，但它正在尝试从我没有的 propertysource 加载 spring.messages.always-use-message-format 属性。

Answer 1

您不能将@Value 与.yml 文件一起使用与.properties 文件相同的方式。

您能否进一步解释“我可以阅读所有秘密和相应的值”的含义。那么它是如何在应用程序中使用的呢？