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C#

C# static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C# code

  • All rules 493
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Filtered: 6 rules found
azure
    Impact
      Clean code attribute
        1. Interfaces for durable entities should satisfy the restrictions

           Code Smell
        2. Azure Functions should log all failures

           Code Smell
        3. Calls to "async" methods should not be blocking in Azure Functions

           Code Smell
        4. Azure Functions should use Structured Error Handling

           Code Smell
        5. Client instances should not be recreated on each Azure Function invocation

           Code Smell
        6. Azure Functions should be stateless

           Code Smell

        Interfaces for durable entities should satisfy the restrictions

        intentionality - logical
        maintainability
        Code Smell
        • azure
        • design

        Why is this an issue?

        More Info

        The recommended way to access Azure Durable Entities is through generated proxy objects with the help of interfaces.

        The following restrictions, during interface design, are enforced:

        • Entity interfaces must be defined in the same assembly as the entity class. This is not detected by the rule.
        • Entity interfaces must only define methods.
        • Entity interfaces must not contain generic parameters.
        • Entity interface methods must not have more than one parameter.
        • Entity interface methods must return void, Task, or Task<T>.

        If any of these rules are violated, an InvalidOperationException is thrown at runtime when the interface is used as a type argument to IDurableEntityContext.SignalEntity<TEntityInterface>, IDurableEntityClient.SignalEntityAsync<TEntityInterface> or IDurableOrchestrationContext.CreateEntityProxy<TEntityInterface>. The exception message explains which rule was broken.

        This rule raises an issue in case any of the restrictions above is not respected.

        Noncompliant code example

        namespace Foo // Noncompliant, must be defined in the same assembly as the entity class that implements it
        {
            public interface ICounter<T> // Noncompliant, interfaces cannot contain generic parameters
            {
                string Name { get; set; } // Noncompliant, interface must only define methods
                void Add(int amount, int secondParameter); // Noncompliant, methods must not have more than one parameter
                int Get(); // Noncompliant, methods must return void, Task, or Task<T>
            }
        }
        
        namespace Bar
        {
            public class Counter : ICounter
            {
                // do stuff
            }
        
            public static class AddToCounterFromQueue
            {
                [FunctionName("AddToCounterFromQueue")]
                public static Task Run(
                    [QueueTrigger("durable-function-trigger")] string input,
                    [DurableClient] IDurableEntityClient client)
                {
                    var entityId = new EntityId("Counter", "myCounter");
                    int amount = int.Parse(input);
                    return client.SignalEntityAsync<ICounter>(entityId, proxy => proxy.Add(amount, 10));
                }
            }
        }
        

        Compliant solution

        namespace Bar
        {
            public interface ICounter
            {
                void Add(int amount);
                Task<int> Get();
            }
        }
        
        namespace Bar
        {
            public class Counter : ICounter
            {
                // do stuff
            }
        
            public static class AddToCounterFromQueue
            {
                [FunctionName("AddToCounterFromQueue")]
                public static Task Run(
                    [QueueTrigger("durable-function-trigger")] string input,
                    [DurableClient] IDurableEntityClient client)
                {
                    var entityId = new EntityId("Counter", "myCounter");
                    int amount = int.Parse(input);
                    return client.SignalEntityAsync<ICounter>(entityId, proxy => proxy.Add(amount));
                }
            }
        }
        
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