A simple workflow application monitor

gistfile1.cs

using System;
using System.Collections.Concurrent;

public interface IWorkflowApplicationMonitor
{
    bool IsRunning(Guid workflowDefinitionId);
    void SetStatusToRunning(Guid workflowDefinitionId);
    void SetStatusToNotRunning(Guid workflowDefinitionId);
}


public class WorkflowApplicationMonitor : IWorkflowApplicationMonitor
{
    public const bool IS_RUNNING_FLAG = true;
    public const bool IS_NOT_RUNNING_FLAG = false;

    private static readonly ConcurrentDictionary<Guid, bool> _runningWorkflowDefinitions =
        new ConcurrentDictionary<Guid, bool>();

    public bool IsRunning(Guid workflowDefinitionId)
    {
        bool isRunning;
        var keyFound = _runningWorkflowDefinitions.TryGetValue(workflowDefinitionId, out isRunning);
        return keyFound ? isRunning : IS_NOT_RUNNING_FLAG;
    }

    public void SetStatusToRunning(Guid workflowDefinitionId)
    {
        _runningWorkflowDefinitions.AddOrUpdate(workflowDefinitionId, IS_RUNNING_FLAG,
            (definitionId, isRunning) => IS_RUNNING_FLAG);
    }

    public void SetStatusToNotRunning(Guid workflowDefinitionId)
    {
        _runningWorkflowDefinitions.AddOrUpdate(workflowDefinitionId.Value, IS_NOT_RUNNING_FLAG,
            (definitionId, isRunning) => IS_NOT_RUNNING_FLAG);
    }
}