用于定义aws step函数的amazon状态语言pythonic api
stairstep的Python项目详细描述
楼梯踏步
stairstep是一个pythonic api，用于使用Amazon's State Language
设计AWS Step Functionsstairstep不需要手工构建json，而是允许您使用python代码定义步骤函数，该代码允许您轻松地从外部源导入信息并动态地创建步骤函数。
开发进度/覆盖范围
| Lanuage Feature | Type | Progress |
|---|---|---|
| State | Pass | ✅ |
| State | Task | ✅ |
| State | Succeed | ✅ |
| State | Fail | ✅ |
| State | Choice | ✅ |
| Field | Common Validations | ✅ |
| State | Wait | Next ? |
| State | Parallel | Next ? |
示例
Hello World
Using the example from the Amazon's State Language第页
{
"Comment": "A simple minimal example of the States language",
"StartAt": "Hello World",
"States": {
"Hello World": {
"Type": "Task",
"Resource": "arn:aws:lambda:us-east-1:123456789012:function:HelloWorld",
"End": true
}
}
}
我们可以很容易地在楼梯间制作出这样的东西，如下所示
# Create a parent StairStep object
ss = StairStep(comment="A simple minimal example of the States language", startAt="Hello World")
# Create the HelloWorld step
StateTask(name="Hello World", resource="arn:aws:lambda:us-east-1:123456789012:function:HelloWorld", end=True)
# Add the step into the StairStep object
ss.addState(hello)
# Create the Amazon State Language Export
ss.json()
{
"Comment":"A simple minimal example of the States language",
"StartAt":"Hello World",
"States":{
"Hello World":{
"Type":"Task",
"Resource":"arn:aws:lambda:us-east-1:123456789012:function:HelloWorld",
"End":true
}
}
}
复杂的选择状态
ss = StairStep(
comment = "Example Choice State",
startAt = "ChoiceStateX"
)
# Create a ChoiceRule, which is composed of choice expression(s)
# This checks to see if the variable $.type is not "Private"
typeNotPrivate = ChoiceRule(operator="Not", snext="Public", conditions=
ChoiceExpression(operator="StringEquals", variable="$.type", value="Private")
)
# This checks to see if the value of $.value is >=20 or <30
valueInTwenties = ChoiceRule(operator="And", snext="ValueInTwenties", conditions=
[
ChoiceExpression(operator="NumericGreaterThanEquals", variable="$.value", value=20),
ChoiceExpression(operator="NumericLessThan", variable="$.value", value=30)
]
)
state = StateChoice(name="ChoiceStateX", choices=[typeNotPrivate,valueInTwenties],default="DefaultState")
default = StatePass(name="DefaultState", end=True)
in_twenties = StatePass(name="ValueInTwenties", end=True)
public = StatePass(name="Public", end=True)
ss.addState(state)
ss.addState(in_twenties)
ss.addState(public)
ss.addState(default)
ss.json()
{
"Comment": "Example Choice State",
"StartAt": "ChoiceStateX",
"States": {
"ChoiceStateX": {
"Type": "Choice",
"Default": "DefaultState",
"Choices": [{
"Next": "Public",
"Not": {
"Variable": "$.type",
"StringEquals": "Private"
}
}, {
"Next": "ValueInTwenties",
"And": [{
"Variable": "$.value",
"NumericGreaterThanEquals": 20
}, {
"Variable": "$.value",
"NumericLessThan": 30
}]
}]
},
"ValueInTwenties": {
"Type": "Pass",
"End": true
},
"Public": {
"Type": "Pass",
"End": true
},
"DefaultState": {
"Type": "Pass",
"End": true
}
}
}
欢迎加入QQ群-->： 979659372
