I am currently working with Flex 4.9 (Mobile App) and BlazeDS integrated with ColdFusion. I have created a simple producer/consumer application where is sends up the object to the server, stores the object, then sends the object to all the connected clients. This is working very well.
However, my only issue is that the client who sent the object, is also receiving it right back. I would prefer this not happen. Is there anyway on the client side, to distinguish if you are the originator.
I understand that the event from the consumer has an originatorID but I have no idea what to match the ID too on return.
Message Handler:
protected function consumer_messageHandler(event:MessageEvent):void
{//Need to check if client is the same HERE
var t:Object = event.message.body.ticket;
var i:ArrayCollection = event.message.body.TI;
if (t != null && t.length > 0)
{
var v:views.delivery.HomeView = this.mainNav.activeView as views.delivery.HomeView;
var dao:DTDAO = new DTDAO();
var t:Object = t.getItemAt(0);
dao.syncDeliveryT(ticket, items);
}
}
Related
Fundamentally all I need to do is grab a users profile photo after successful login (asp.net 4.8) since it doesn't seem that I can request the photo to come over with the login claims.
This is the callback handler
SecurityTokenValidatedNotification<Microsoft.IdentityModel.Protocols.OpenIdConnect.OpenIdConnectMessage, OpenIdConnectAuthenticationOptions> notification
This is how I get the Identity from that callback and it's all there looking good
var identity = notification.AuthenticationTicket.Identity;
So I'm trying to callback with RestSharp
var client = new RestSharp.RestClient("https://graph.microsoft.com");
var request = new RestSharp.RestRequest($"/v1.0/users/{email}/photo/$value", RestSharp.Method.GET);
var callbackResult = client.Execute(request);
Debugger.Break();
if (callbackResult.StatusCode == HttpStatusCode.OK)
{
Debugger.Break();
}
But it keeps (I suppose OBVIOUSLY) coming back as unauthorized. Is there some token or something I can use now that the user has authenticated to add a header or querystring or something that will just get me the extra data easily?
Currently, I have dozens of .NET services hosted on various machines that show up as Resources on my AppInsights Application Map, which also shows their dependencies with respect to each other, based on the HTTP requests they make.
However, the relationships between services that communicate through NServiceBus (RabbitMQ) are not shown. Now, I am able to show the messages that are either sent or handled by a service via calls to TelemetryClient.TrackXXX(), but not connect Resources on the map using this information.
I have even gone so far as to attach the parent operation ID from the NSB message sender to the message itself, and assign it to the telemetry object in the receiver, but there is still no line drawn between the services in the Application Map.
To reiterate, this is what I'm getting in the Application Map:
(NSB Message Sender) --> (Message sent/handled)
And this is what I want:
(NSB Sender) --> (Receiver)
The services in question are .NET Core 3.1.
I cannot provide the code, as this is for my work, but any help would be greatly appreciated. I've searched everywhere, and even sources that seemed like they would help, didn't.
(not signed in, posting from work)
Alright, I finally got it. My approach to correlate AppInsights resources using their NSB communication is to mimic HTTP telemetry correlation.
Below is an extension method I wrote for AppInsights' TelemetryClient. I made a subclass named RbmqMessage:NServiceBus.IMessage, given my applications use RBMQ, and gave it the following properties for the sake of correlation (all set in the service that sends the message) :
parentId: equal to DependencyTelemetry.Id
opId: value is the same in the sender's DependencyTelemetry and the receiver's RequestTelemetry. Equal to telemetry.context.operation.id
startTime: DateTime.Now was good enough for my purposes
The code in the service that sends the NSB message:
public static RbmqMessage TrackRbmq(this TelemetryClient client, RbmqMessage message)
{
var msg = message;
// I ran into some issues with Reflection
var classNameIdx = message.ToString().LastIndexOf('.') + 1;
var messageClassName = message.ToString().Substring(classNameIdx);
var telemetry = new DependencyTelemetry
{
Type = "RabbitMQ",
Data = "SEND "+messageClassName,
Name = "SEND "+messageClassName,
Timestamp = DateTime.Now,
Target = "RECEIVE "+messageClassName //matches name in the service receiving this message
};
client.TrackDependency(telemetry);
msg.parentId = telemetry.Id;
msg.opId = telemetry.Context.Operation.Id; //this wont have a value until TrackDependency is called
msg.startTime = telemetry.Timestamp;
return msg;
}
The code where you send the NSB message:
var msg = new MyMessage(); //make your existing messages inherit RbmqMessage
var correlatedMessage = _telemetryClient.TrackRbmq(msg);
MessageSession.Publish(correlatedMessage); //or however the NSB message goes out in your application
The extension method in the NServiceBus message-receiving service:
public static void TrackRbmq(this TelemetryClient client, RbmqMessage message)
{
var classnameIdx = message.ToString().LastIndexOf('.')+1;
var telemetry = new RequestTelemetry
{
Timestamp = DateTime.Now,
Name = "RECEIVE "+message.ToString().Substring(classNameIdx)
};
telemetry.Context.Operation.ParentId = message.parentId;
telemetry.Context.Operation.Id = message.opId;
telemetry.Duration = message.startTime - telemetry.Timestamp;
client.TrackRequest(telemetry);
}
And finally, just track and send the message:
var msg = new MyMessage();
_telemetryClient.TrackRbmq(msg);
MessagePipeline.Send(msg); //or however its sent in your app
I hope this saves someone the trouble I went through.
I would like to utilize oData without HTTP.
Scenario: "Load Balancer" oData-capable service receives requests from
clients, puts them into a queue (in serialized form), then "background" workers pick up
messages from the queue and process the request (get data from data
storage and provide response)
And it seems that such functionality either it is not exposed in MS oData libs, or it is so simple and obvious (though not for me) that nobody cares to highlight it in the docs.
I see it something like (pseudo-code)
var model = GetEdmModel();
var processor = GetProcessor(); // something like ODataController in AspNet.oData - contains functions and whatever
var request = GetRequestFromQueueAndParse();
var uriPath = request.Path; // like "/Books"
var queryString = request.QueryString; // like "$filter=price lt 50"
var method = request.Method; // GET or POST or ...
var body = request.Body;
// *** here is what I am looking for ***
var response = SomeMagicODataHelper.ProcessQuery(model, processor, method, uriPath, queryString, body);
ProvideResponseBackToBalancer(response);
Is there something alike provided by (preferable) standard MS oData library, or as a third-party library?
Is it possible to execute a query asynchronously in hive server?
For eg, How can I /Is it possible to do something like this from the client-
QueryHandle handle = executeAsyncQuery(hiveQuery);
Status status = handle.checkStatus();
if(status.isCompleted()) {
QueryResult result = handle.fetchResult();
}
I also had a look at How do I make an async call to Hive in Java?. But did not help. The answers were mostly around the thrift clients taking a callback argument.
Any help would be appreciated. Thanks!
[EDIT 1]
I went through the HiveConnection.java in hive-jdbc. hive-jdbc by default uses the async thrift APIs. Hence it submits a query and polls for result sets (look at HiveStatement.java). Now i am able to write a piece of code which is purely non blocking. But the problem is as soon as the client disconnect the foot print about the query is lost.
Client 1
final TCLIService.Client client = new TCLIService.Client(createBinaryTransport(host, port, loginTimeout, sessConf, false)); // from HiveConnection.java
TSessionHandle sessionHandle = openSession(client) // from HiveConnection.java
TExecuteStatementReq execReq = new TExecuteStatementReq(sessionHandle, sql);
execReq.setRunAsync(true);
execReq.setConfOverlay(sessConf);
final TGetOperationStatusReq handle = client.ExecuteStatement(execReq)
writeHandleToFile("~/handle", handle)
Client 2
final TGetOperationStatusReq handle = readHandleFromFile("~/handle")
final TCLIService.Client client = new TCLIService.Client(createBinaryTransport(host, port, loginTimeout, sessConf, false));
while (true) {
System.out.println(client.GetOperationStatus(handle).getOperationState());
Thread.sleep(1000);
}
Client 2 keeps printing FINISHED_STATE as long as Client 1 is alive. But if client 1 process completes or gets killed, client 2 starts printing null which means hiveserver2 is cleaning up the resources as soon as a client disconnects.
Is it possible to configure hiveserver2 to configure this clean up process based on time or something?
Thanks!
Did some research and figured out that this happens only with binary transport (tcp)
#Override
public void deleteContext(ServerContext serverContext,
TProtocol input, TProtocol output) {
Metrics metrics = MetricsFactory.getInstance();
if (metrics != null) {
try {
metrics.decrementCounter(MetricsConstant.OPEN_CONNECTIONS);
} catch (Exception e) {
LOG.warn("Error Reporting JDO operation to Metrics system", e);
}
}
ThriftCLIServerContext context = (ThriftCLIServerContext) serverContext;
SessionHandle sessionHandle = context.getSessionHandle();
if (sessionHandle != null) {
LOG.info("Session disconnected without closing properly, close it now");
try {
cliService.closeSession(sessionHandle);
} catch (HiveSQLException e) {
LOG.warn("Failed to close session: " + e, e);
}
}
}
The above stub (from ThriftBinaryCLIService) gets executed through this piece of code from TThreadPoolServer which is used by ThriftBinaryCLIService.
eventHandler.deleteContext(connectionContext, inputProtocol,
outputProtocol);
Apparently http transport (ThriftHttpCLIService) has a different strategy of cleaning up operation handles (not greedy like tcp)
Will check with hive community on this to understand a bit more and see if there is an issue addressing this already.
So this code runs in an asp.net app on Linux. The code calls one of my services. (WCF doesn't work on mono currently, that is why I'm using asmx). This code works AS INTENDED when running from Windows (while debugging). As soon as I deploy to Linux, it stops working. I'm definitely baffled. I've tested the service thoroughly and the service is fine.
Here is the code producing an error: (NewVisitor is a void function taking 3 strings in)
//This does not work.
try
{
var client = new Service1SoapClient();
var results = client.NewVisitor(Request.UserHostAddress, Request.UrlReferrer == null ? String.Empty : Request.UrlReferrer.ToString(), Request.UserAgent);
Logger.Debug("Result of client: " + results);
}
Here is the error generated: Object reference not set to an instance of an object
Here is the code that works perfectly:
//This works (from the service)
[WebMethod(CacheDuration = _cacheTime, Description = "Returns a List of Dates", MessageName = "GetDates")]
public List<MySqlDateTime> GetDates()
{
return db.GetDates();
}
//Here is the code for the method above
var client = new Service1Soap12Client();
var dbDates = client.GetDates();
I'd love to figure out why it is saying that the object is not set.
Methods tried:
new soap client.
new soap client with binding and endpoint address specified
Used channel factory to create and open the channel.
If more info is needed I can give more. I'm out of ideas.
It looks like a bug in mono. You should file a bug with a reproducible test case so it can be fixed (and possibly find a workaround you can use).
Unfortunately, I don't have Linux to test it but I'd suggest you put the client variable in an using() statement:
using(var client = new Service1SoapClient())
{
var results = client.NewVisitor(Request.UserHostAddress, Request.UrlReferrer == null ?
String.Empty : Request.UrlReferrer.ToString(), Request.UserAgent);
Logger.Debug("Result of client: " + results);
}
I hope it helps.
RC.