问题

@RestController
@ConditionalOnProperty(value = ["app.running-mode.read-write"], havingValue = "true", matchIfMissing = true)
class MyRestController(private val r: MyRestService) {
    @GetMapping
    // some endpoint here

    @PostMapping
    // some endpoint here
}

app.running-mode.read-write=${MY_API_RUNNING_MODE_READ_WRITE}

当我运行应用程序时，有时会崩溃，出现 java.lang.IllegalStateException，并且我看到错误信息是：

在值中无法解析占位符 'MY_API_RUNNING_MODE_READ_WRITE`，该值为 "${MY_API_RUNNING_MODE_READ_WRITE}"

这应该是 Azure 设置的环境变量，但我可能是不是错误地定义了我的 @ConditionalOnProperty，导致它注入了文字字符串，如日志中所示，而不是环境变量？（顺便说一下，这应该是布尔值 true 或 false）

<details>
<summary>英文:</summary>

I have a Spring Boot application, with a class annotated as a `@RestController` and also having `@ConditionalOnProperty` annotation on my class `MyRestController.kt` (kotlin) as below:

```kotlin
@RestController
@ConditionalOnProperty(value = [&quot;app.running-mode.read-write&quot;],havingValue = &quot;true&quot;, matchIfMissing = true)

class MyRestController(private val r : MyRestService){
    @GetMapping
    // some endpoint here
    
    @PostMapping
    // some endpoint here
}

My application.properties looks like this:

app.running-mode.read-write=${MY_API_RUNNING_MODE_READ_WRITE}

When I run my app sometimes, it crashes for a java.lang.IllegalStateException on my class that contains this ConditionalOnProperty annotation MyRestController.kt, and I see it says:

Could not resolve placeholder 'MY_API_RUNNING_MODE_READ_WRITE` in value "${MY_API_RUNNING_MODE_READ_WRITE}"

This should be an environment variable set by Azure, but do I possibly have my @ConditionalOnProperty defined incorrectly such that it is injecting the literal String, as seen in the logs, instead of the environment variable? (Which should be a boolean true or false, by the way)

答案1

得分: 1

问题可能出在您提供值的方式上。由于您正在从环境中为不同的环境注入值，所以该值可能不存在，甚至在环境中提供错误。请检查以确保它被正确提供。确保环境配置了键 "MY_API_RUNNING_MODE_READ_WRITE"。

既然您是从 application.properties 中读取值，那么可以尝试在删除 '[]' 后按以下方式提供：

@RestController
@ConditionalOnProperty(value = "app.running-mode.read-write", havingValue = "true", matchIfMissing = true)

class MyRestController(private val r: MyRestService) {
    @GetMapping
    // 这里是某个端点

    @PostMapping
    // 这里是某个端点
}

@RestController
@ConditionalOnProperty(value = "app.running-mode.read-write",havingValue = "true", matchIfMissing = true)

class MyRestController(private val r : MyRestService){
    @GetMapping
    // some endpoint here
    
    @PostMapping
    // some endpoint here
}