ALIYUN::ROS::WaitCondition is used to create an instance to process UserData messages.

Syntax

{
  "Type": "ALIYUN::ROS::WaitCondition",
  "Properties": {
    "Count": Number ,
    "Handle": String,
    "Timeout": Number 
  }
}

Properties

Name Type Required Editable Description Validity
Handle String Yes Yes A reference to the wait condition handle used to signal this wait condition. None
Timeout Number Yes No The length of time to wait for UserData messages. Valid values: 1 to 43200. Unit: seconds.
Count Number No No The total number of messages to be received. None

Response parameters

Fn::GetAtt
  • Data: a JSON-serialized dictionary that contains the signal data after the most recent stack creation or update.
  • LastData: a JSON-serialized dictionary that contains the signal data before the most recent stack update.
  • JoinedErrorData: a string that contains data associated with wait condition error signals sent to the handle.
  • JoinedLastErrorData: a string that contains data associated with wait condition error signals sent to the handle before the most recent stack update.
  • ErrorData: a JSON-serialized dictionary that contains the error signal data after the most recent stack creation or update.
  • Lasterprotodata: a JSON-serialized dictionary that contains the error signal data before the most recent stack update.

Examples

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Resources": {
    "WaitCondition": {
      "Type": "ALIYUN::ROS::WaitCondition",
      "Properties": {
        "Handle": {
          "Ref": "WaitConHandle"
        },
        "Timeout": 5,
        "Count": 2
      }
    },
    "WaitConHandle": {
      "Type": "ALIYUN::ROS::WaitConditionHandle"
    }
  },
  "Outputs": {
    "CurlCli": {
      "Value": {
        "Fn::GetAtt": [
          "WaitConHandle",
          "CurlCli"
        ]
      }
    },
    "Data": {
      "Value": {
        "Fn::GetAtt": [
          "WaitCondition",
          "Data"
        ]
      }
    }
  }
}