使用自定义谓词处理错误

定义自定义错误处理程序，包括自定义谓词和自定义退避参数。

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

• 重试步骤

代码示例

YAML

# Define a custom error handler, custom predicate, and custom backoff parameters
# The `my_own_predicate` subworkflow accepts a map as an argument and defines the
# exception; it returns true if a retry; false, otherwise
# Expected outcome: the execution fails and returns an HTTP 404 Not Found error
main:
  steps:
    - read_item:
        try:
          call: http.get
          args:
            url: https://example.com/someapi
          result: api_response
        retry:
          predicate: ${my_own_predicate}
          max_retries: 5
          backoff:
            initial_delay: 2
            max_delay: 60
            multiplier: 2
    - last_step:
        return: "OK"

my_own_predicate:
  params: [e]
  steps:
    - log_error_tags:
        call: sys.log
        args:
          data: ${e.tags}
          severity: "INFO"
    - log_error_message:
        call: sys.log
        args:
          data: ${e.message}
          severity: "INFO"
    - log_error_code:
        call: sys.log
        args:
          data: ${e.code}
          severity: "INFO"
    - what_to_repeat:
        switch:
          - condition: ${e.code == 202}
            return: true
    - otherwise:
        return: false

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。