README.md

Polly Demos

• This project contains all the Polly demos.
• This is the only project which is not runnable since it is a class library.

flowchart LR
    console{{PollyTestClientConsole}}
    wpf{{PollyTestClientWPF}}
    lib>PollyDemos]
    api[/PollyTestWebApi\]
    style lib stroke:#0f0

    console -- uses --> lib
    wpf -- uses --> lib
    lib -- invokes --> api

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Exposed functionality

• There are 10 demos to show the basics of Polly.
• There are two extra demos to illustrate the usage of ConcurrencyLimiter.
• Each demo builds on the former one so, the comments are focused only on the new things.
• Every demo runs until it is stopped.
• The demos expose colored logs and statistics via a DemoProgress data class.

Structure

• In order to keep the demos Polly focused, the common parts are extracted into base classes.
• This diagram depicts the inheritance hierarchy:
  • Note: not all DemoXY classes were added to diagram for sake of simplicity.

classDiagram
    ConcurrencyLimiterDemoBase <|-- Demo11_MultipleConcurrencyLimiters
    DemoBase <|-- Demo09_Pipeline_Fallback_Timeout_WaitAndRetry
    DemoBase <|-- Demo00_NoStrategy
    DemoBase <|-- ConcurrencyLimiterDemoBase

    class ConcurrencyLimiterDemoBase{
        #int MoreStatisticFields
        #Task<string> IssueGoodRequestAndProcessResponseAsync(...)
        #Task<string> IssueFaultingRequestAndProcessResponseAsync(...)
    }

    class DemoBase{
        #int StatisticFields
        +string Description
        #DemoProgress ProgressWithMessage(...)
        +Task ExecuteAsync(...)
        #Task<string> IssueRequestAndProcessResponseAsync(...)
    }

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• Several data classes are defined under the OutputHelpers directory.
• The Configuration class contains the base URL of the PollyTestWebApi project.