/// <summary>
/// Get a service client from pool and make sure it is workable.
/// </summary>
/// <remarks>
/// Notice: Call ReleaseProxyClient when you're done with ServiceClient.
/// </remarks>
/// <returns>service client</returns>
public AzureServiceClient GetProxyClient()
{
while (true)
{
AzureServiceClient client = this.InternalGetProxyClient();
if (client.ServiceClient.State == CommunicationState.Closed ||
client.ServiceClient.State == CommunicationState.Closing ||
client.ServiceClient.State == CommunicationState.Faulted)
{
BrokerTracing.TraceVerbose(
"[ProxyClientPool].GetProxyClient: Client is not ready for use, remove it, {0}, {1}",
client,
client.ServiceClient.Endpoint.Address);
this.RemoveProxyClient(client);
if (client.ServiceClient.State == CommunicationState.Faulted)
{
client.AsyncClose();
}
}
else
{
BrokerTracing.TraceVerbose(
"[ProxyClientPool].GetProxyClient: Get a client ready for use, {0}, {1}",
client,
client.ServiceClient.Endpoint.Address);
return(client);
}
}
}
/// <summary>
/// Handle client failure
/// </summary>
/// <param name="client">targeted client</param>
private static void HandleClientFailure(AzureServiceClient client)
{
try
{
BrokerTracing.TraceWarning(
"[AzureDispatcher] HandleClientFailure: Handle invalid client, {0}, {1}",
client,
client.ServiceClient.Endpoint.Address);
Dictionary <EndpointAddress, ProxyClientPool> .ValueCollection pools;
lock (LockProxyClientPoolDic)
{
pools = ProxyClientPoolDic.Values;
}
foreach (var pool in pools)
{
bool existInPool = false;
lock (pool)
{
BrokerTracing.TraceVerbose(
"[AzureDispatcher] HandleClientFailure: Remove client {0} from pool.", client);
existInPool = pool.RemoveProxyClient(client);
}
if (existInPool)
{
BrokerTracing.TraceVerbose(
"[AzureDispatcher] HandleClientFailure: Close client {0}", client);
// Close the proxy client if any exception is encountered.
// As a result, async pending callback on clients will be
// invoked (with exception).
client.AsyncClose();
return;
}
}
}
catch (Exception e)
{
BrokerTracing.TraceError(
"[AzureDispatcher] HandleClientFailure: Error occurs, {0}", e);
}
}
