Compare Exchange: How to Get Compare Exchange Value

• Use GetCompareExchangeValueOperation to return the saved compare-exchange Value for the specified Key.

• For an overview of the 'Compare Exchange' feature click: Compare Exchange Overview

• In this page:

  • Syntax
  • Example I - Value is 'long'
  • Example II - Value is a custom object

Syntax

Method:

public GetCompareExchangeValueOperation(string key)

Returned object:

public class CompareExchangeValue<T>
{
  public readonly string Key;
  public readonly T Value;
  public readonly long Index;
}

| ------------- | ----- | ---- | | Key | string | The unique object identifier | | Value | T | The existing value that Key has | | Index | long | The version number of the Value that is stored for the specified Key |

Example I - Value is 'long'

CompareExchangeValue<long> readResult =
  store.Operations.Send(new GetCompareExchangeValueOperation<long>("NextClientId"));

long value = readResult.Value;

Example II - Value is a custom object

CompareExchangeValue<User> readResult =
  store.Operations.Send(new GetCompareExchangeValueOperation<User>("AdminUser"));

User admin = readResult.Value;