Gradle任务报错IllegalArgumentException: identity-provider未找到

正在开发Gradle任务用于获取GraphQL Schema并保存到文件，任务需要从application-dev.yml加载配置，使用SnakeYAML解析时持续报错“identity-provider not found”。

相关代码 #

build.gradle.kts #

// Load configuration from YAML
fun loadConfig(): Map<String, String> {
    val yaml = Yaml()
    val inputStream = FileInputStream("src/main/resources/application-dev.yml")
    val data: Map<String, Any> = yaml.load(inputStream)
    println("Data loaded from YAML: $data")

    val customsConfig = data["customs"] as? Map<*, *> ?: run {
        println("Customs key not found or not a map!")
        throw IllegalArgumentException("customs not found")
    }
    println("Customs Config: $customsConfig")

    val identityProviderConfig = customsConfig["identity-provider"] as? Map<*, *> ?: run {
        println("Identity-provider key not found or not a map!")
        throw IllegalArgumentException("identity-provider not found")
    }
    println("Identity Provider Config: $identityProviderConfig")

    val tokenConfig = identityProviderConfig["token"] as? Map<*, *> ?: run {
        println("Token key not found or not a map!")
        throw IllegalArgumentException("token not found")
    }
    println("Token Config: $tokenConfig")

    return tokenConfig as Map<String, String>
}

// Task to fetch GraphQL schema
tasks.register("fetchSchema") {
    doLast {
        try {
            println("Loading configuration...")
            val config = loadConfig()
            val clientId = config["client-id"] ?: throw IllegalArgumentException("client-id not found")
            val clientSecret = config["client-secret"] ?: throw IllegalArgumentException("client-secret not found")
            val token = fetchToken(clientId, clientSecret)
            println("Token fetched: $token")
            println("Fetching GraphQL Schema...")
            fetchGraphQLSchema("https://xxx-data.api.dev.xxx.com/graphql", token, "src/main/resources/schema2.graphql")
            println("Schema has been fetched successfully.")
        } catch (e: Exception) {
            println("An error occurred: ${e.message}")
            e.printStackTrace()
        }
    }
}

application-dev.yml #

customs:
  bridge:
    public-url: http://localhost:8080
  security:
    post:
      user:
        creation:
          enabled: false
  multi-tenancy:
    enabled: true
    default:
      maxPoolSize: 10
      minIdle: 0
      connectionTimeout: 5000
      idleTimeout: 20000
      maxLifetime: 600000
      driverClassName: oracle.jdbc.driver.OracleDriver
  identity-provider:
    token:
      url: https://login.dev.XXX.com/connect/token
      client-id: placeholder_client_id
      tenant-id: placeholder_tenant_id
      scope: placeholder_scope
      client-secret: placeholder_client_secret

控制台输出 #

> Task :fetchSchema
Loading configuration...
Data loaded from YAML: {server={port=8080, allow={origin=*}, tomcat={max-swallow-size=10MB}}, spring={sql={init-mode=never}, output={ansi={enabled=always}}, resources={cache-period=60000, chain={cache=true, enabled=true}}, thymeleaf={cache=false}, ...
Identity-provider key not found or not a map!
An error occurred: identity-provider not found

排查与解决步骤 #

1. 验证YAML文件结构与缩进
   YAML对缩进严格要求，必须使用空格（不能用Tab）。检查identity-provider节点是否正确嵌套在customs下，缩进层级与bridge、security等节点一致。

2. 打印完整的Customs配置内容
   当前控制台输出中customsConfig被截断，无法确认其完整结构。修改代码，在获取customsConfig后打印所有键和完整内容：

   println("Customs Config keys: ${customsConfig.keys}")
   println("Full Customs Config: $customsConfig")
   

   这能直接确认customs节点下是否存在identity-provider键，以及键名是否与代码中使用的一致（比如是否被解析为驼峰式identityProvider）。

3. 确认文件路径正确性
   检查FileInputStream("src/main/resources/application-dev.yml")的路径是否正确：

   • 确认文件确实存在于项目根目录下的src/main/resources中
   • 检查文件名拼写（比如是否写成application-dev.yaml而非.yml）

4. 检查SnakeYAML解析配置
   默认情况下SnakeYAML不会转换键的大小写格式，但如果自定义了解析规则（比如使用Constructor或TypeDescription），可能会将kebab-case的键转为驼峰式。此时需要调整代码中的键名，或者修改SnakeYAML的解析配置保持键名原样。

5. 安全类型转换优化
   为避免类型转换失败导致的异常，可以增加更多调试信息，比如在获取identity-provider前，先判断customsConfig中该键的类型：

   println("Type of 'identity-provider' in customs: ${customsConfig["identity-provider"]?.javaClass}")
   

内容的提问来源于stack exchange，提问作者Japkutija