public async Task WatcherSample()
{
// Retrieve the connection string from the configuration store.
// You can get the string from your Azure portal.
var connectionString = Environment.GetEnvironmentVariable("APP_CONFIG_CONNECTION");
// Instantiate a client that will be used to call the service.
var client = new ConfigurationClient(connectionString);
// Setup the watcher to watch "key1" and "key2"
var watcher = new ConfigurationWatcher(client, "key1", "key2");
watcher.SettingChanged += (sender, e) =>
{
Console.WriteLine($"old value: {e.Older.Value}");
Console.WriteLine($"new value: {e.Newer.Value}");
};
// Print errors occuring during watching
watcher.Error += (sender, e) =>
{
Console.WriteLine($"Error {e.Message}");
};
// start watching
watcher.Start();
// watch for 1 second
await Task.Delay(1000);
// stop watching
await watcher.Stop();
}
//[Test]
public async Task Helpers()
{
var connectionString = Environment.GetEnvironmentVariable("AZ_CONFIG_CONNECTION");
Assert.NotNull(connectionString, "Set AZ_CONFIG_CONNECTION environment variable to the connection string");
var client = new ConfigurationClient(connectionString);
var source = new CancellationTokenSource();
const int numberOfSettings = 2;
// key prexfix used to partition tests running at the same time so that they don't interract with each other
var testPartition = Guid.NewGuid().ToString();
var addedSettings = new List <ConfigurationSetting>(numberOfSettings);
try {
// add settings to the store
for (int i = 0; i < numberOfSettings; i++)
{
var reponse = await client.AddAsync(new ConfigurationSetting($"{testPartition}_{i}", i.ToString()));
Assert.AreEqual(200, reponse.Status);
addedSettings.Add(reponse.Result);
}
var changed = new List <SettingChangedEventArgs>(); // acumulator for detected changes
var watcher = new ConfigurationWatcher(client, addedSettings.Select((setting) => setting.Key).ToArray());
watcher.SettingChanged += (sender, e) =>
{
changed.Add(e);
};
watcher.Error += (sender, e) =>
{
Assert.Fail(e.Message);
};
// start watching for changes
watcher.Start();
// do updates in the service store
for (int i = 0; i < numberOfSettings; i++)
{
var updated = addedSettings[i];
updated.Value = (i + 100).ToString();
var response = await client.UpdateAsync(updated);
}
// wait for updates to be detected
await Task.Delay(2000);
await watcher.Stop();
// assert expectations
Assert.AreEqual(numberOfSettings, changed.Count);
}
finally {
// delete settings from the service store
foreach (var setting in addedSettings)
{
var response = await client.DeleteAsync(setting.Key);
if (response.Status != 200)
{
throw new Exception("could not delete setting " + setting.Key);
}
}
}
}
