/// <summary>
/// Load the page list box with the current set of configured performance counters.
/// </summary>
protected void LoadListBox()
{
try
{
this.ListBox1.Items.Clear();
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(
WebRole.GetConfigurationSettingValue(WebRole.WADConnectionString));
var roleInstanceDiagnosticManager = cloudStorageAccount.CreateRoleInstanceDiagnosticManager(
RoleEnvironment.DeploymentId,
RoleEnvironment.CurrentRoleInstance.Role.Name,
RoleEnvironment.CurrentRoleInstance.Id);
var roleDiagnosticMonitorConfiguration = roleInstanceDiagnosticManager.GetCurrentConfiguration();
var performanceCounterSources = roleDiagnosticMonitorConfiguration.PerformanceCounters.DataSources;
foreach (var configuration in performanceCounterSources)
{
this.ListBox1.Items.Add(configuration.CounterSpecifier);
}
}
catch (RoleEnvironmentException rex)
{
// The connection string was missing or invalid.
System.Diagnostics.Trace.WriteLine("WebRole environment diagnostics error: " + rex.Message);
}
catch (InvalidOperationException iox)
{
// Parse of the connection string failed.
System.Diagnostics.Trace.WriteLine("WebRole environment diagnostics error: " + iox.Message);
}
}
/// <summary>
/// The page load event handler.
/// </summary>
/// <param name="sender">The event sender.</param>
/// <param name="e">The event arguments.</param>
protected void Page_Load(object sender, EventArgs e)
{
// Refresh page every few seconds.
Response.AddHeader("Refresh", "30");
this.LabelSampleRate.Text =
WebRole.GetConfigurationSettingValue(WebRole.WebRoleSampleRateName);
this.LabelTransferInterval.Text =
WebRole.GetConfigurationSettingValue(WebRole.WebRolePeriodName);
}
/// <summary>
/// Initializes static members of the PerformanceCountersDataSource class.
/// </summary>
static PerformanceCountersDataSource()
{
storageAccount = CloudStorageAccount.Parse(
WebRole.GetConfigurationSettingValue(WebRole.WADConnectionString));
CloudTableClient cloudTableClient = new CloudTableClient(
storageAccount.TableEndpoint.ToString(),
storageAccount.Credentials);
serviceContext = cloudTableClient.GetDataServiceContext();
serviceContext.RetryPolicy = RetryPolicies.Retry(3, TimeSpan.FromSeconds(1.0d));
roleId = RoleEnvironment.CurrentRoleInstance.Id;
}
/// <summary>
/// Updates the performance counter configuration based on the current list in ServiceConfiguration.cscfg.
/// </summary>
private static void ConfigureDiagnostics()
{
try
{
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(
WebRole.GetConfigurationSettingValue(WADConnectionString));
var roleInstanceDiagnosticManager = cloudStorageAccount.CreateRoleInstanceDiagnosticManager(
RoleEnvironment.DeploymentId,
RoleEnvironment.CurrentRoleInstance.Role.Name,
RoleEnvironment.CurrentRoleInstance.Id);
var roleDiagnosticMonitorConfiguration = roleInstanceDiagnosticManager.GetCurrentConfiguration();
// Copy settings from configuration.
double webRolePeriod;
if (!double.TryParse(WebRole.GetConfigurationSettingValue(WebRolePeriodName), out webRolePeriod))
{
Trace.WriteLine("WebRole environment diagnostics error: " + WebRolePeriodName + " parse failed.");
// Set the default to one minute.
webRolePeriod = 1d;
}
// Transfer diagnostic information once every webRolePeriod minutes.
TimeSpan transferPeriod = TimeSpan.FromMinutes(webRolePeriod);
roleDiagnosticMonitorConfiguration.PerformanceCounters.ScheduledTransferPeriod = transferPeriod;
double webRoleSampleRate;
if (!double.TryParse(WebRole.GetConfigurationSettingValue(WebRoleSampleRateName), out webRoleSampleRate))
{
Trace.WriteLine("WebRole environment diagnostics error: " + WebRoleSampleRateName + " parse failed.");
// Set the default to ten seconds.
webRoleSampleRate = 10d;
}
// Remove original performance counters and add new set
roleDiagnosticMonitorConfiguration.PerformanceCounters.DataSources.Clear();
string webRoleConfig = WebRole.GetConfigurationSettingValue(WebRoleConfigName);
string[] separators = new string[] { ConfigSeparator };
string[] webRoleCounterSpecifiers = webRoleConfig.Split(separators, StringSplitOptions.RemoveEmptyEntries);
foreach (string specifier in webRoleCounterSpecifiers)
{
roleDiagnosticMonitorConfiguration.PerformanceCounters.DataSources.Add(
new PerformanceCounterConfiguration()
{
CounterSpecifier = specifier,
SampleRate = TimeSpan.FromSeconds(webRoleSampleRate)
});
Trace.WriteLine("WebRole performance counter added: " + specifier);
}
roleInstanceDiagnosticManager.SetCurrentConfiguration(roleDiagnosticMonitorConfiguration);
}
catch (RoleEnvironmentException rex)
{
// The connection string was missing.
Trace.WriteLine("WebRole environment diagnostics error: " + rex.Message);
}
catch (InvalidOperationException iox)
{
// Parse of the connection string failed.
Trace.WriteLine("WebRole environment diagnostics error: " + iox.Message);
}
}