/// <summary>
/// Initializes a new instance.
/// </summary>
protected AWSQueue(AWSSettings settings, string queueName)
{
_client = AWSClient.Create(
settings,
(creds, reg) => new AmazonSQSClient(creds, reg),
creds => new AmazonSQSClient(creds),
reg => new AmazonSQSClient(reg),
() => new AmazonSQSClient());
_queueUrl = new Lazy <string>(() => _client.GetQueueUrlAsync(queueName)
.ConfigureAwait(false).GetAwaiter().GetResult().QueueUrl);
}
/// <summary>
/// Helps creating AWS client based on specified settings.
/// Provide AWS constructors for each case, and have specific client initialized based on which
/// settings components are provided.
/// </summary>
/// <example><![CDATA[
/// public class MyQueue
/// {
/// private readonly AmazonSQSClient _client;
/// private readonly Lazy<string> _queueUrl;
///
/// public MyQueue(AWSSettings settings, string queueName)
/// {
/// _client = AWSClient.Create(
/// settings,
/// (creds, reg) => new AmazonSQSClient(creds, reg),
/// creds => new AmazonSQSClient(creds),
/// reg => new AmazonSQSClient(reg),
/// () => new AmazonSQSClient());
///
/// _queueUrl = new Lazy<string>(() => _client.GetQueueUrlAsync(queueName)
/// .ConfigureAwait(false).GetAwaiter().GetResult().QueueUrl);
/// }
/// }
/// ]]></example>
public static T Create <T>(
AWSSettings settings,
Func <AWSCredentials, RegionEndpoint, T> createByCredentialsAndRegion,
Func <AWSCredentials, T> createByCredentials,
Func <RegionEndpoint, T> createByRegion,
Func <T> createByDefault)
{
SharedCredentialsFile file = null;
CredentialProfile profile = null;
AWSCredentials credentials = null;
RegionEndpoint region = null;
var hasKey = !String.IsNullOrWhiteSpace(settings?.Key);
var hasSecret = !String.IsNullOrWhiteSpace(settings?.Secret);
var hasRegion = !String.IsNullOrWhiteSpace(settings?.Region);
var hasProfile = !String.IsNullOrWhiteSpace(settings?.UseProfile);
if (hasProfile)
{
file = new SharedCredentialsFile();
if (!file.TryGetProfile(settings.UseProfile, out profile))
{
throw new InvalidOperationException($"Cannot read AWS profile '{settings.UseProfile}'");
}
}
if (hasKey && hasSecret)
{
credentials = new BasicAWSCredentials(settings.Key, settings.Secret);
}
else if (hasProfile)
{
if (!AWSCredentialsFactory.TryGetAWSCredentials(profile, file, out credentials))
{
throw new InvalidOperationException($"Cannot get AWS credentials from profile '{profile.Name}'");
}
}
if (hasRegion)
{
region = RegionEndpoint.GetBySystemName(settings.Region);
}
else if (hasProfile)
{
region = profile.Region;
}
if (credentials != null && region != null)
{
return(createByCredentialsAndRegion(credentials, region));
}
if (credentials != null)
{
return(createByCredentials(credentials));
}
if (region != null)
{
return(createByRegion(region));
}
return(createByDefault());
}