/// <summary>
/// Invokes the specified service method.
/// </summary>
/// <param name="method">The method to be invoked.</param>
/// <exception cref="ArgumentNullException"><paramref name="method"/> is a null
/// reference.</exception>
private TResult _Invoke <TResult>(Func <TService, TResult> method)
{
CodeContract.RequiresNotNull("method", method);
var invocationWrapper = new RetriableInvocationWrapper(
MAX_RETRY_COUNT,
_PrepareRetry,
_TranslateException);
var result = default(TResult);
invocationWrapper.Invoke(() =>
{
try
{
using (var connection = _connectionPool.AcquireConnection())
{
result = method(connection.Client);
}
}
catch (Exception ex)
{
if (!_exceptionHandler.HandleException(ex, _serviceTitle))
{
throw;
}
}
});
return(result);
}
/// <summary>
/// Checks if the specified url points to the load balancing service.
/// </summary>
/// <param name="serviceUrl">Url to check for service presence.</param>
/// <returns>true if and only if the <paramref name="serviceUrl"/>
/// points to the load balancing service.</returns>
public static bool HasLoadBalanceService(string serviceUrl)
{
var hasService = false;
try
{
var metadataUri = new Uri(serviceUrl + "?wsdl");
var mexClient = new MetadataExchangeClient(
metadataUri,
MetadataExchangeClientMode.HttpGet);
var metadataRetrievalWrapper = new RetriableInvocationWrapper(
MAX_RETRY_COUNT,
_PrepareForRetry);
var metaDocs = metadataRetrievalWrapper.Invoke(
() => mexClient.GetMetadata());
var importer = new WsdlImporter(metaDocs);
var contracts = importer.ImportAllContracts();
foreach (var contract in contracts)
{
if (string.Equals(
contract.Name,
LOAD_BALANCE_SERVICE_CONTRACT_NAME,
StringComparison.InvariantCulture))
{
hasService = true;
break;
}
}
}
catch (InvalidOperationException e)
{
Logger.Warning(e);
}
catch (Exception e)
{
if (!ServiceHelper.IsCommunicationError(e))
{
throw;
}
Logger.Warning(e);
}
return(hasService);
}
/// <summary>
/// Sends REST request to the specified url.
/// </summary>
/// <typeparam name="T">The type of the request result.</typeparam>
/// <param name="context">The reference to the rest request context object.</param>
/// <param name="url">The url to send request to.</param>
/// <param name="query">The query to be sent.</param>
/// <param name="opt">The reference to the request sending options.</param>
/// <returns>Result of the specified REST request.</returns>
/// <exception cref="T:ESRI.ArcLogistics.Routing.RestException">error was
/// returned by the REST API.</exception>
/// <exception cref="T:ESRI.ArcLogistics.CommunicationException">failed
/// to communicate with the REST service at the specified url.</exception>
/// <exception cref="T:System.ArgumentNullException">Any of
/// <paramref name="context"/>, <paramref name="url"/>,
/// <paramref name="query"/> or <paramref name="opt"/> arguments is a null
/// reference.</exception>
public T SendRequest <T>(
IRestRequestContext context,
string url,
string query,
HttpRequestOptions opt)
{
Debug.Assert(context != null);
Debug.Assert(!string.IsNullOrEmpty(url));
Debug.Assert(!string.IsNullOrEmpty(query));
Debug.Assert(opt != null);
var sendRequestWrapper = new RetriableInvocationWrapper(
MAX_RETRY_COUNT,
(e) => _PrepareRetry(context, e),
(e) => _TranslateException(context, e));
var stopwatch = new Stopwatch();
stopwatch.Start();
return(sendRequestWrapper.Invoke(() =>
{
var timeout = opt.Timeout - stopwatch.ElapsedMilliseconds;
timeout = Math.Max(timeout, 0);
opt.Timeout = (int)timeout;
var response = _SendRequest <T>(
context,
url,
query,
opt);
RestHelper.ValidateResponse(response);
return response;
}));
}
/// <summary>
/// Checks if the specified url points to the load balancing service.
/// </summary>
/// <param name="serviceUrl">Url to check for service presence.</param>
/// <returns>true if and only if the <paramref name="serviceUrl"/>
/// points to the load balancing service.</returns>
public static bool HasLoadBalanceService(string serviceUrl)
{
var hasService = false;
try
{
var metadataUri = new Uri(serviceUrl + "?wsdl");
var mexClient = new MetadataExchangeClient(
metadataUri,
MetadataExchangeClientMode.HttpGet);
var metadataRetrievalWrapper = new RetriableInvocationWrapper(
MAX_RETRY_COUNT,
_PrepareForRetry);
var metaDocs = metadataRetrievalWrapper.Invoke(
() => mexClient.GetMetadata());
var importer = new WsdlImporter(metaDocs);
var contracts = importer.ImportAllContracts();
foreach (var contract in contracts)
{
if (string.Equals(
contract.Name,
LOAD_BALANCE_SERVICE_CONTRACT_NAME,
StringComparison.InvariantCulture))
{
hasService = true;
break;
}
}
}
catch (InvalidOperationException e)
{
Logger.Warning(e);
}
catch (Exception e)
{
if (!ServiceHelper.IsCommunicationError(e))
{
throw;
}
Logger.Warning(e);
}
return hasService;
}