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    • Neon.Xunit.YugaByte
      • YugaByteFixture
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      • YugaByteHelper

    Class RetryPolicy

    Base class for used to help implement a IRetryPolicy.

    Inheritance
    object
    RetryPolicy
    Implements
    IRetryPolicy
    Namespace: Neon.Retry
    Assembly: Neon.Common.dll
    Syntax
    public abstract class RetryPolicy : IRetryPolicy

    Constructors

    RetryPolicy(string, TimeSpan?)

    Constructor.

    Declaration
    public RetryPolicy(string categoryName = null, TimeSpan? timeout = null)
    Parameters
    Type Name Description
    string categoryName

    Optionally enables transient error logging by identifying the source category name (defaults to null).

    TimeSpan? timeout

    Optionally specifies the maximum time the operation should be retried (defaults to no limit).

    Fields

    DefaultMaxAttempts

    The default number of times an operation should be attempted for transient exceptions.

    Declaration
    public const int DefaultMaxAttempts = 5
    Field Value
    Type Description
    int

    Properties

    Timeout

    Returns the optional policy timeout. When present, this specifies the maximum time the policy will continue retrying the operation.

    Declaration
    public TimeSpan? Timeout { get; }
    Property Value
    Type Description
    TimeSpan?

    Methods

    AdjustDelay(TimeSpan)

    Adjusts the delay TimeSpan passed to ensure such that delaying the next retry won't exceed the overall retry timeout (if specified).

    Declaration
    protected TimeSpan AdjustDelay(TimeSpan delay)
    Parameters
    Type Name Description
    TimeSpan delay

    The requested delay.

    Returns
    Type Description
    TimeSpan

    The adjusted delay.

    Remarks
    note

    If the result is Zero or negative, the calling retry policy should immediately stop retrying.

    Clone(Func<Exception, bool>)

    Returns a copy of the retry policy.

    Declaration
    public abstract IRetryPolicy Clone(Func<Exception, bool> transientDetector = null)
    Parameters
    Type Name Description
    Func<Exception, bool> transientDetector

    Optionally specifies a replacement transient detector function that will be set in the cloned policy.

    Returns
    Type Description
    IRetryPolicy

    The policy copy.

    Invoke(Action, CancellationToken)

    Retries a synchronous action that returns no result when it throws exceptions due to transient errors. The classification of what is a transient error, the interval between the retries as well as the number of times the operation are retried are determined by the policy implementation.

    Declaration
    public abstract void Invoke(Action action, CancellationToken cancellationToken = default)
    Parameters
    Type Name Description
    Action action

    The synchronous action to be performed.

    CancellationToken cancellationToken

    Optionally specifies a cancellation token.

    InvokeAsync(Func<Task>, CancellationToken)

    Retries an asynchronous action that returns no result when it throws exceptions due to transient errors. The classification of what is a transient error, the interval between the retries as well as the number of times the operation are retried are determined by the policy implementation.

    Declaration
    public abstract Task InvokeAsync(Func<Task> action, CancellationToken cancellationToken = default)
    Parameters
    Type Name Description
    Func<Task> action

    The asynchronous action to be performed.

    CancellationToken cancellationToken

    Optionally specifies a cancellation token.

    Returns
    Type Description
    Task

    InvokeAsync<TResult>(Func<Task<TResult>>, CancellationToken)

    Retries an asynchronous action that returns TResult when it throws exceptions due to transient errors. he classification of what is a transient error, the interval between the retries as well as the number of times the operation are retried are determined by the policy implementation.

    Declaration
    public abstract Task<TResult> InvokeAsync<TResult>(Func<Task<TResult>> action, CancellationToken cancellationToken = default)
    Parameters
    Type Name Description
    Func<Task<TResult>> action

    The asynchronous action to be performed.

    CancellationToken cancellationToken

    Optionally specifies a cancellation token.

    Returns
    Type Description
    Task<TResult>

    The action result.

    Type Parameters
    Name Description
    TResult

    The action result type.

    Invoke<TResult>(Func<TResult>, CancellationToken)

    Retries a synchronous action that returns a result when it throws exceptions due to transient errors. The classification of what is a transient error, the interval between the retries as well as the number of times the operation are retried are determined by the policy implementation.

    Declaration
    public abstract TResult Invoke<TResult>(Func<TResult> action, CancellationToken cancellationToken = default)
    Parameters
    Type Name Description
    Func<TResult> action

    The synchronous action to be performed.

    CancellationToken cancellationToken

    Optionally specifies a cancellation token.

    Returns
    Type Description
    TResult

    The action result.

    Type Parameters
    Name Description
    TResult

    The action result type.

    LogTransient(Exception)

    Handles logging of transient exceptions by invoking any OnTransient event handlers and then logging the transient exception when none of the handlers indicated that they handled the event.

    Declaration
    protected void LogTransient(Exception e)
    Parameters
    Type Name Description
    Exception e

    The transient exception.

    Events

    OnTransient

    Used to intercept and handle logging for transient exceptions detected by a retry policy. Handlers can set Handled in the argument passed to prevent subsequent handlers from being invoked and also prevent the transient exception from being logged.

    When no handlers are added to this event, the default behavior is to log all transient failures.

    Declaration
    public event Action<RetryTransientArgs> OnTransient
    Event Type
    Type Description
    Action<RetryTransientArgs>

    Implements

    IRetryPolicy
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