public HealthCheckService(HealthCheckBuilder builder, IServiceProvider serviceProvider, IServiceScopeFactory serviceScopeFactory)
{
_builder = builder;
_groups = GetGroups().Where(group => group.GroupName != string.Empty).ToList();
_root = GetGroup(string.Empty);
_serviceProvider = serviceProvider;
_serviceScopeFactory = serviceScopeFactory;
}
/// <summary>
/// This constructor should only be used when creating a grouped health check builder.
/// </summary>
public HealthCheckBuilder(HealthCheckBuilder rootBuilder, HealthCheckGroup currentGroup)
{
Guard.ArgumentNotNull(nameof(rootBuilder), rootBuilder);
Guard.ArgumentNotNull(nameof(currentGroup), currentGroup);
_checksByName = rootBuilder._checksByName;
_currentGroup = currentGroup;
_groups = rootBuilder._groups;
DefaultCacheDuration = rootBuilder.DefaultCacheDuration;
}
public HealthCheckBuilder()
{
_checksByName = new Dictionary <string, CachedHealthCheck>(StringComparer.OrdinalIgnoreCase);
_currentGroup = new HealthCheckGroup(string.Empty, CheckStatus.Unhealthy);
_groups = new Dictionary <string, HealthCheckGroup>(StringComparer.OrdinalIgnoreCase)
{
[string.Empty] = _currentGroup
};
DefaultCacheDuration = TimeSpan.FromMinutes(5);
}
/// <summary>
/// Uses the provided service provider and executes the checks in the given group.
/// </summary>
public async Task<CompositeHealthCheckResult> RunGroupAsync(IServiceProvider serviceProvider,
HealthCheckGroup group, CancellationToken cancellationToken = default(CancellationToken)) {
var result = new CompositeHealthCheckResult(group.PartiallyHealthyStatus);
var checkTasks = group.Checks.Select(check =>
new {Check = check, Task = check.RunAsync(serviceProvider, cancellationToken).AsTask()}).ToList();
await Task.WhenAll(checkTasks.Select(checkTask => checkTask.Task));
foreach (var checkTask in checkTasks) result.Add(checkTask.Check.Name, checkTask.Task.Result);
return result;
}
/// <summary>
/// Creates a new health check group, to which you can add one or more health
/// checks.
/// </summary>
public HealthCheckBuilder AddHealthCheckGroup(string groupName, Action <HealthCheckBuilder> groupChecks, CheckStatus partialSuccessStatus)
{
Guard.ArgumentNotNullOrEmpty(nameof(groupName), groupName);
Guard.ArgumentNotNull(nameof(groupChecks), groupChecks);
Guard.ArgumentValid(partialSuccessStatus != CheckStatus.Unknown, nameof(partialSuccessStatus), "Check status 'Unknown' is not valid for partial success.");
Guard.ArgumentValid(!_groups.ContainsKey(groupName), nameof(groupName), $"A group with name '{groupName}' has already been registered.");
Guard.OperationValid(_currentGroup.GroupName == string.Empty, "Nested groups are not supported by HealthCheckBuilder.");
var group = new HealthCheckGroup(groupName, partialSuccessStatus);
_groups.Add(groupName, group);
var innerBuilder = new HealthCheckBuilder(this, group);
groupChecks(innerBuilder);
return(this);
}
/// <summary>
/// Creates a new resolution scope from the default service provider and executes the checks in the given group.
/// </summary>
public async Task <CompositeHealthCheckResult> RunGroupAsync(HealthCheckGroup group, CancellationToken cancellationToken = default(CancellationToken))
{
using (var scope = GetServiceScope())
return(await RunGroupAsync(scope.ServiceProvider, group, cancellationToken).ConfigureAwait(false));
}