protected override void Dispose(bool disposing)
{
if (disposing)
{
if (this.internalAgent != null)
{
SessionInternal.Utility.SafeCloseCommunicateObject(this.internalAgent);
this.internalAgent = null;
}
}
base.Dispose(disposing);
}
/// <summary>
/// Recreate the internal DataServiceAgent instance
/// </summary>
private void RecreateInternalAgent()
{
// close previouus agent instance
if (this.internalAgent != null)
{
this.excludedProxyInstances.Add(this.selectedProxyInstance);
TraceHelper.TraceSource.TraceEvent(TraceEventType.Error, 0, "[DataProxyAgent] . Proxy instance {0} is excluded", this.selectedProxyInstance);
SessionInternal.Utility.SafeCloseCommunicateObject(this.internalAgent);
this.internalAgent = null;
}
List <string> proxyInstances = null;
try
{
proxyInstances = proxyFileReader.GetProxyInstances(true);
// remove excludedProxyInstances from all instance list
foreach (string excludedInstance in this.excludedProxyInstances)
{
proxyInstances.Remove(excludedInstance);
}
if (proxyInstances == null || proxyInstances.Count == 0)
{
throw new Exception("No healthy data proxy instance is available");
}
}
catch (Exception ex)
{
throw new DataException(DataErrorCode.ConnectDataServiceFailure, ex);
}
// pick a proxy instance at random
int index = (new Random()).Next(proxyInstances.Count);
this.selectedProxyInstance = proxyInstances[index];
string dataProxyAddress = string.Format(Constant.DataProxyEndpointFormat, this.selectedProxyInstance, DataProxyPorts.ProxyPort);
this.internalAgent = new DataServiceAgent(new Uri(dataProxyAddress));
this.internalAgent.Endpoint.Behaviors.Add(new DataMessageInspector());
}