c# - RabbitMQ not receiving messages when used with TopShelf as a Windows Service -


i'm trying convert rabbitmq micro-service windows service. have used topshelf conversion. rabbitmq micro-service works fine on own when run service no longer receives messages. in public static void main(string[] args) have:

 hostfactory.run(host =>                 {                     host.service<personservice>(s =>                                           {                         s.constructusing(name => new personservice());                         s.whenstarted(tc => tc.start());                                      s.whenstopped(tc => tc.stop());                                    });                     host.setdescription("windows service provides database access totables.");                      host.setdisplayname("service");                                        host.setservicename("service");                 });             }

then in personservice class have 

public void start() {             consumemessage();         }

and consumemessage function:

private static void consumemessage() {         messagingconfig.setinstance(new messagingconstants());         imessagefactory pmfinst = messagefactory.instance;          //message worker         var factory = new connectionfactory() {             hostname = messagingconfig.instance.getbrokerhostname(),             username = messagingconfig.instance.getbrokerusername(),             password = messagingconfig.instance.getbrokerpassword()         };          var connection = factory.createconnection();          using (var channel = connection.createmodel()) {             channel.queuedeclare(queue: messagingconfig.instance.getservicequeuename(),                                  durable: true,                                  exclusive: false,                                  autodelete: false,                                  arguments: null);              channel.basicqos(0, 1, false);              var consumer = new eventingbasicconsumer(channel);              channel.basicconsume(queue: messagingconfig.instance.getservicequeuename(),                                  noack: false,                                  consumer: consumer);              console.writeline("service.");             console.writeline(" [x] awaiting rpc requests");               // code below not executed in service             consumer.received += (model, ea) => {                  string response = null;                  var body = ea.body;                 var props = ea.basicproperties;                 var replyprops = channel.createbasicproperties();                 replyprops.correlationid = props.correlationid;                  string receivedmessage = null;                  try {                     receivedmessage = encoding.utf8.getstring(body);                     response = processmessage(receivedmessage);                 }                 catch (exception e) {                     // received message not valid.                     winlogger.log.error(                         "errror processing message: " + receivedmessage + " :" + e.message);                      response = "";                 }                 {                      var responsebytes = encoding.utf8.getbytes(response);                     channel.basicpublish(exchange: "", routingkey: props.replyto,                     basicproperties: replyprops, body: responsebytes);                     channel.basicack(deliverytag: ea.deliverytag,                     multiple: false);                 }             };             console.readline();         }

looking @ a similar question looks has return windows service wanting, i'm not sure of how call consumemessage consumer.received += (model, ea) => {...}; executed.

edit: looks blocking mechanism console.readline(); ignored service continues on , disposes of message consumer. how block there messages received?

you code uses using construct, means when onstart method returns, channel disposed. docs suggest initialization on onstart, create channel , consumer there, don't use using:

this.connection = factory.createconnection();  this.channel = connection.createmodel(); this.consumer = new eventingbasicconsumer(this.channel);

then objects continue exist after onstart method finished. should dispose of them in onstop method.


Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more