dubbo-spring-boot-project | Spring Boot Project for Apache Dubbo | Messaging library

by apache Java Version: 2.7.9 License: Apache-2.0

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kandi X-RAY | dubbo-spring-boot-project Summary

dubbo-spring-boot-project is a Java library typically used in Messaging, Spring Boot, Spring applications. dubbo-spring-boot-project has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. However dubbo-spring-boot-project has 1 bugs. You can download it from GitHub, Maven.

Apache Dubbo Spring Boot Project makes it easy to create Spring Boot application using Dubbo as RPC Framework. What's more, it also provides:. Apache Dubbo |ˈdʌbəʊ| is a high-performance, light weight, java based RPC framework. Dubbo offers three key functionalities, which include interface based remote call, fault tolerance & load balancing, and automatic service registration & discovery.

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Security

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kandi-support Support

dubbo-spring-boot-project has a medium active ecosystem.
It has 5085 star(s) with 1736 fork(s). There are 355 watchers for this library.
It had no major release in the last 12 months.
There are 38 open issues and 529 have been closed. On average issues are closed in 58 days. There are 4 open pull requests and 0 closed requests.
It has a neutral sentiment in the developer community.
The latest version of dubbo-spring-boot-project is 2.7.9

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quality kandi Quality

dubbo-spring-boot-project has 1 bugs (0 blocker, 0 critical, 1 major, 0 minor) and 58 code smells.

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This Library - Quality

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security Security

dubbo-spring-boot-project has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
dubbo-spring-boot-project code analysis shows 0 unresolved vulnerabilities.
There are 6 security hotspots that need review.

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license License

dubbo-spring-boot-project is licensed under the Apache-2.0 License. This license is Permissive.
Permissive licenses have the least restrictions, and you can use them in most projects.

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build Reuse

dubbo-spring-boot-project releases are available to install and integrate.
Deployable package is available in Maven.
Build file is available. You can build the component from source.
Installation instructions, examples and code snippets are available.
dubbo-spring-boot-project saves you 2560 person hours of effort in developing the same functionality from scratch.
It has 5563 lines of code, 264 functions and 118 files.
It has low code complexity. Code complexity directly impacts maintainability of the code.

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Top functions reviewed by kandi - BETA

kandi has reviewed dubbo-spring-boot-project and discovered the below as its top functions. This is intended to give you an instant insight into dubbo-spring-boot-project implemented functionality, and help decide if they suit your requirements.

Performs the health check .
Shuts down the registry .
Get the extra properties from the given environment .
Resolve bean metadata .
Retrieves a map of all the Metadata for the application .
Resolve unique application config bean .
Performs the actual invocation .
Add or replace the source .
Builds the banner text .
Adds the metadata for the given class .

dubbo-spring-boot-project Key Features

You can introduce the latest dubbo-spring-boot-starter to your project by adding the following dependency to your pom.xml.

dubbo-spring-boot-project Examples and Code Snippets

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Released version

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&lt;properties&gt;
    &lt;spring-boot.version&gt;2.3.0.RELEASE&lt;/spring-boot.version&gt;
    &lt;dubbo.version&gt;2.7.8&lt;/dubbo.version&gt;
&lt;/properties&gt;
    
&lt;dependencyManagement&gt;
    &lt;dependencies&gt;
        &lt;!-- Spring Boot --&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
            &lt;artifactId&gt;spring-boot-dependencies&lt;/artifactId&gt;
            &lt;version&gt;${spring-boot.version}&lt;/version&gt;
            &lt;type&gt;pom&lt;/type&gt;
            &lt;scope&gt;import&lt;/scope&gt;
        &lt;/dependency&gt;

        &lt;!-- Apache Dubbo  --&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.apache.dubbo&lt;/groupId&gt;
            &lt;artifactId&gt;dubbo-dependencies-bom&lt;/artifactId&gt;
            &lt;version&gt;${dubbo.version}&lt;/version&gt;
            &lt;type&gt;pom&lt;/type&gt;
            &lt;scope&gt;import&lt;/scope&gt;
        &lt;/dependency&gt;
      
    &lt;/dependencies&gt;
&lt;/dependencyManagement&gt;

&lt;dependencies&gt;
    &lt;!-- Dubbo Spring Boot Starter --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.apache.dubbo&lt;/groupId&gt;
        &lt;artifactId&gt;dubbo-spring-boot-starter&lt;/artifactId&gt;
        &lt;version&gt;2.7.8&lt;/version&gt;
    &lt;/dependency&gt;    
&lt;/dependencies&gt;

Getting Started

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public interface DemoService {

    String sayHello(String name);

}

Dubbo service(s) provider

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@DubboService(version = "1.0.0")
public class DefaultDemoService implements DemoService {

    /**
     * The default value of ${dubbo.application.name} is ${spring.application.name}
     */
    @Value("${dubbo.application.name}")
    private String serviceName;

    public String sayHello(String name) {
        return String.format("[%s] : Hello, %s", serviceName, name);
    }
}

Dubbo service(s) consumer

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@EnableAutoConfiguration
public class DubboAutoConfigurationConsumerBootstrap {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    @DubboReference(version = "1.0.0", url = "dubbo://127.0.0.1:12345")
    private DemoService demoService;

    public static void main(String[] args) {
        SpringApplication.run(DubboAutoConfigurationConsumerBootstrap.class).close();
    }

    @Bean
    public ApplicationRunner runner() {
        return args -&gt; {
            logger.info(demoService.sayHello("mercyblitz"));
        };
    }
}

Building from Source

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$ ./mvnw clean install

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Community Discussions

Trending Discussions on Messaging

Change CloudOTP to Random Number in the Firebase Phone Authentication OTP
SQL - Selecting a users conversation based on members
How to know where a message is in RabbitMQ
Quarkus Reactive AMQP client processing in threaded manner
RabbitMQ on Windows seems to limit connection creation per process
Azure.Messaging.ServiceBus Error when completing or abandoning message
MSK vs SQS + SNS
How to represent communication protocol in UML?
NATS JetStream: Is it possible to explicitly ask from JetStream to (re)send the last few messages it received in subject foo.*?
Wildfly messaging stored in a JDBC datasource for several servers

Trending Discussions on Messaging

QUESTION

Change CloudOTP to Random Number in the Firebase Phone Authentication OTP

Asked 2022-Apr-04 at 19:32

I'm facing some issue in the firebase phone authentication OTP sender name means when the user receives the Firebase OTP the Sender Name shows as CloudOTP. More details please check the screenshot.

Current User Receive OTP with name

Screen Shot

I want to show number like below screenshot.

Screenshot

Question: How to change sender name?

Any help would be greatly appreciated.

Thanks in advance.

ANSWER

Answered 2021-Nov-17 at 15:07

The name or number that is shown with the text message that contains the OTP is determined by the provider and your phone. As far as I know there is no way for you to control that.

Source https://stackoverflow.com/questions/70006130

QUESTION

SQL - Selecting a users conversation based on members

Asked 2022-Mar-20 at 16:17

I am trying to formulate a query to select a conversation based on members passed in, this can be many participants.

Users can have multiple conversation with the same users in, and they can rename conversations.

Here is my messages members table:

CREATE TABLE `messages_members` (
      `relation_id` int(11) NOT NULL,
      `user_id` int(11) NOT NULL,
      `date` datetime NOT NULL,
      `seen` smallint(6) NOT NULL,
      PRIMARY KEY (`relation_id`,`user_id`),
      KEY `seen` (`seen`,`date`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

And the messages relation table:

CREATE TABLE `messages_relation` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `sender_id` int(11) NOT NULL,
  `date` datetime NOT NULL,
  `name` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=49 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

Messages table for reference:

CREATE TABLE `messages` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `relation_id` int(11) NOT NULL,
  `user_id` int(11) NOT NULL,
  `message` longtext COLLATE utf8mb4_unicode_ci NOT NULL,
  `date` datetime NOT NULL,
  `updated` smallint(6) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `messages` (`relation_id`,`user_id`),
  KEY `date` (`date`)
) ENGINE=InnoDB AUTO_INCREMENT=135 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci

My latest solution is not working right as it is selecting a wrong conversation based on members count passed in.

Only thing I can think of at the momemt is to take the limit off the query and then loop through each result and do some checks to see if the members match what was asked for.

I wonder if there is a more elegant solution using a query though to do this.

Here is my current query: EDIT: Updated query as was doing the count properly.

  SELECT relation_id AS relation, GROUP_CONCAT(user_id) AS members, COUNT(user_id) AS selected_members,
            (SELECT COUNT(user_id) FROM messages_members WHERE relation_id = relation) AS total_members
            FROM messages_members            
            WHERE user_id IN( ". $inQuery ." )
            GROUP BY relation_id 
            HAVING total_members = ? AND selected_members = ?

I am passing in each users_id from an array, and also the total count of the array to match total members.

For more clarity to try explain what im trying to do there could be multiple conversations with simialir participants:

Conversation A : user1, user2, user3
Conversation B : user1, user2
Conversation C : user1, user2, user5

I am trying to just select conversation A based on the three users passed in, user1, user2, user3

Some sample data from the messages_members table: relation_id, user_id, date, seen

relation_id	user_id	date	seen
2	1	2020-11-18 19:16:54.000	0
5	4	2020-11-18 19:53:34.000	0
5	6	2020-11-18 19:53:34.000	0
14	1	2020-11-19 00:02:44.000	0
14	3	2020-11-19 00:02:44.000	0
19	1	2020-11-19 00:16:32.000	0
19	3	2020-11-19 00:16:32.000	0
20	3	2020-11-19 00:17:37.000	0
20	4	2020-11-19 00:17:37.000	0
21	1	2020-11-19 00:18:09.000	0
21	3	2020-11-19 00:18:09.000	0
21	6	2020-11-19 00:18:09.000	0
22	1	2020-11-19 00:18:45.000	0
22	4	2020-11-19 00:18:45.000	0
22	6	2020-11-19 00:18:45.000	0
23	1	2020-11-19 00:19:06.000	0
23	3	2020-11-19 00:19:06.000	0
23	4	2020-11-19 00:19:06.000	0
24	3	2020-11-19 00:19:42.000	0
24	4	2020-11-19 00:19:42.000	0
24	6	2020-11-19 00:19:42.000	0
25	3	2020-11-19 01:41:44.000	0
25	5	2020-11-19 01:41:44.000	0
43	1	2022-02-28 17:38:34.000	0
43	54	2022-02-28 17:38:35.000	0
46	1	2022-03-16 23:24:43.000	0
46	5	2022-03-16 23:24:43.000	0
47	1	2022-03-16 23:25:51.000	0
47	3	2022-03-16 23:25:51.000	0
47	5	2022-03-16 23:25:51.000	0
48	1	2022-03-17 00:19:26.000	0
2	5	2020-11-18 19:16:54.000	1
23	6	2020-11-19 00:19:06.000	1
47	6	2022-03-16 23:25:51.000	1
48	15	2022-03-17 00:19:26.000	1
54	3	2022-03-19 00:19:22.000	1
54	5	2022-03-19 00:19:22.000	1
55	1	2022-03-19 00:23:18.000	1
55	3	2022-03-19 00:23:18.000	1
55	5	2022-03-19 00:23:18.000	1

For some examples using the above data, relation_id is one conversation.

So using the bottom 3 examples,

If i want to look for a conversation just between user 1 and user 3, it should not return relation_id 55, because it also has user 5 in it.
Same as relation_id 47 as that has user 5 in it too.
It should just return relation_id 14 which only has user1, and user3. There is more conversations just between user1 and user3 but I would just return the first one it finds.

ANSWER

Answered 2022-Mar-19 at 04:08

I'm not a php guy, but something like this would return only conversations involving user_id 1 and user_id 3:

SELECT mm.relation_id
       , GROUP_CONCAT(mm.user_id) AS User_List
FROM   message_members mm
WHERE  mm.user_id IN (1,3) -- find user_id 1 or 3
AND    NOT EXISTS (
         -- Does not involve other user_id's
         SELECT NULL
         FROM   message_members ex
         WHERE  ex.relation_id = mm.relation_id
         AND    ex.user_id NOT IN (1,3) -- exclude user_id 1 or 3
)
GROUP BY mm.relation_id
-- Where "2" is the unique number of users 
-- i.e. Find user 1 and user 2 = 2 distinct user_id's
HAVING COUNT(DISTINCT mm.user_id) = 2
;

Results:

relation_id | User_List
----------: | :--------
         14 | 1,3      
         19 | 1,3

db<>fiddle here

Source https://stackoverflow.com/questions/71534011

QUESTION

Quarkus Reactive AMQP client processing in threaded manner

Asked 2022-Feb-22 at 16:52

I am attempting to use Quarkus' AMQP (reactive-messaging-amqp) extension to decouple work from the original REST request. The idea being the REST call would kick off a long running action and could later come back to get the result.

However, it seems that in my code, Quarkus runs each step in the same thread, completing the work before returning from the original sendNewLRA() call. I would have assumed that the message would be sent through AMQP, thus decoupling the process after the message was sent. Why isn't this the case? I currently don't have any AMQP/messaging specific configuration, and just letting the default run from its own TestContainer (managed by Quarkus)

REST handler:

    @Inject
    LRAMessenger messenger;
    
    @LRA(end = false)
    @GET
    @Path("start")
    @Produces(MediaType.TEXT_PLAIN)
    public Response hello(
        @HeaderParam(LRA_HTTP_CONTEXT_HEADER) URI lraId,
        @QueryParam("processTime") int processTime,
        @QueryParam("payload") String payload
    ) {
        log.info("Start. LRA ID: {}", lraId);
        
        StartMessage start = new StartMessage();
        start.setLraId(lraId);
        start.setProcessTime(processTime);
        start.setPayload(payload);
        
        this.messenger.sendNewLRA(start); // blocks here
        log.info("Sent lra processing message.");
        
        return Response.ok(lraId).build();
    }

Messaging code:

@ApplicationScoped
@Slf4j
public class LRAMessenger {
    
    @Inject
    NarayanaLRAClient lraClient;
    
    @Inject
    @Channel("lra-out")
    Emitter<StartMessage> startEmitter;
    
    /**
     * Method to kick off backend processing.
     * @param startMessage The mesage to send
     */
    @Incoming("lra-start")
    public void sendNewLRA(StartMessage startMessage) {
        startEmitter.send(startMessage);
    }
    
    @Incoming("lra-out")
    public void processLRA(StartMessage startMessage) throws InterruptedException {
        log.info("Got lra message in process step: {}", startMessage);
        lraClient.setCurrentLRA(startMessage.getLraId());
        
        int waitTime = startMessage.getProcessTime() / 10;
        
        for (int percent = 10; percent <= 100; percent += 10) {
            log.info("Waiting to simulate processing...");
            Thread.sleep(waitTime);
            log.info("Done waiting ({}%)", percent);
        }
        log.info("Waiting to simulate processing completed.");
        lraClient.closeLRA(startMessage.getLraId());
        log.info("Closed LRA.");
    }
}

Output:

2022-02-21 11:48:28,723 INFO  [org.acm.cus.dem.end.LRAResourceTest] (main) testing LRA.
2022-02-21 11:48:29,192 INFO  [org.acm.cus.dem.end.LRAResource] (executor-thread-0) Start. LRA ID: http://localhost:49251/lra-coordinator/0_ffffac110006_b651_6213c25d_2
2022-02-21 11:48:29,200 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Got lra message in process step: StartMessage(processTime=10000, payload=null)
2022-02-21 11:48:29,200 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:30,201 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (10%)
2022-02-21 11:48:30,202 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:31,203 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (20%)
2022-02-21 11:48:31,204 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:32,205 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (30%)
2022-02-21 11:48:32,206 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:33,207 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (40%)
2022-02-21 11:48:33,207 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:34,208 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (50%)
2022-02-21 11:48:34,209 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:35,210 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (60%)
2022-02-21 11:48:35,211 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:36,211 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (70%)
2022-02-21 11:48:36,212 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:37,212 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (80%)
2022-02-21 11:48:37,213 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:38,214 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (90%)
2022-02-21 11:48:38,215 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing...
2022-02-21 11:48:39,216 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Done waiting (100%)
2022-02-21 11:48:39,216 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Waiting to simulate processing completed.
2022-02-21 11:48:39,235 INFO  [org.acm.cus.dem.mes.LRAMessenger] (executor-thread-0) Closed LRA.
2022-02-21 11:48:39,237 INFO  [org.acm.cus.dem.end.LRAResource] (executor-thread-0) Sent lra processing message.

Note: I would expect for the Sent lra processing message. log to appear early in the process, probably before the Got lra message in process step log message.

ANSWER

Answered 2022-Feb-22 at 16:52

Found the answer, or at least a fix...

Adding @Blocking to the second step in the messaging chain seems to have decoupled the process:

    @Incoming("lra-out")
    @Blocking
    public void processLRA(StartMessage startMessage) throws InterruptedException {
        log.info("Got lra message in process step: {}", startMessage);
        // ...

Source https://stackoverflow.com/questions/71210235

QUESTION

RabbitMQ on Windows seems to limit connection creation per process

Asked 2022-Feb-21 at 15:25

I want to understand the behavior I'm seeing with the following code. Using the RabbitMQ.Client library version 6.2.2.

Expected behavior: Connections are created quickly and the process does not slow down.

Actual behavior: First 6 connections are created quickly, after that there is a significant slowdown and connections are created one by done (1s apart).

Note; starting the program multiple times shows similar behavior. That leads me to believe that the bottleneck is per-process rather than RabbitMQ or system resources.

Note 2; system resources are not the bottleneck (AFAIK).

Does anybody know what is causing the observed behavior? RabbitMQ installed on Windows 10 with default settings.

using RabbitMQ.Client;
using System;

namespace ConsoleApp1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            for (int i = 0; i < 50; i++)
            {
                var factory = new ConnectionFactory() { HostName = "localhost" };
                var connection = factory.CreateConnection();

                var channel1 = connection.CreateModel();
                var channel2 = connection.CreateModel();

                Console.WriteLine(i);
            }
            Console.ReadLine();
        }
    }
}

EDIT: I know this violates every best practice regarding "Single connection per process". I'm just curious what is limiting the connection creation and if there is any setting that can control this behavior.

ANSWER

Answered 2022-Feb-21 at 15:25

The .NET client uses the ThreadPool which probably doesn't have enough threads out of the box. You need to increase the amount available:

https://github.com/rabbitmq/rabbitmq-dotnet-client/blob/main/projects/TestApplications/MassPublish/Program.cs#L21

See issues and discussion here:

https://github.com/rabbitmq/rabbitmq-dotnet-client/search?q=threadpool

_{NOTE: the RabbitMQ team monitors the rabbitmq-users mailing list and only sometimes answers questions on StackOverflow.}

Source https://stackoverflow.com/questions/71142319

QUESTION

Azure.Messaging.ServiceBus Error when completing or abandoning message

Asked 2022-Feb-21 at 13:16

Som I'm currently looking into updating our very simple service bus service to the latest version (Asure.Messaging.Servicebus) and I'm running into a smaller problem here.

The thing is I want to complete or abandon received or peaked messages manually by delegating the message back to methods in my service class to handle the job.

Here is my simple class so far, exposed by an interface.

using myProject.Interfaces;
using myProject.Utilities;
using Azure.Messaging.ServiceBus;
using System;

namespace myProject.Services
{
    /// <summary>
    /// Service bus service controller
    /// </summary>
    public class ServiceBusService: IServiceBusService
    {
        private IConfigurationUtility _configurationUtility;
        static string connectionString;
        static ServiceBusClient client;
        static ServiceBusSender sender;
        static ServiceBusReceiver receiver;

        public ServiceBusService(IConfigurationUtility configurationUtility)
        {
            _configurationUtility = configurationUtility;
            connectionString = _configurationUtility.GetSetting("ServiceBusConnectionString");
            client = new ServiceBusClient(connectionString);
        }

        /// <summary>
        /// Sending message.
        /// </summary>
        /// <param name="messageContent"></param>
        /// <param name="queueName"></param>
        public void SendMessage(string messageContent, string queueName)
        {
            sender = client.CreateSender(queueName);
            ServiceBusMessage message = new ServiceBusMessage(messageContent);
            sender.SendMessageAsync(message).Wait();
        }

        /// <summary>
        /// Receive message.
        /// </summary>
        /// <returns></returns>
        /// <param name="queueName"></param>
        public ServiceBusReceivedMessage ReceiveMessage(string queueName)
        {

            receiver = client.CreateReceiver(queueName);
            ServiceBusReceivedMessage receivedMessage = receiver.ReceiveMessageAsync().Result;
            return receivedMessage;
        }

        /// <summary>
        /// Peek message.
        /// </summary>
        /// <returns></returns>
        public ServiceBusReceivedMessage PeekMessage(string queueName)
        {
            receiver = client.CreateReceiver(queueName);
            ServiceBusReceivedMessage peekedMessage = receiver.PeekMessageAsync().Result;
            return peekedMessage;
        }

        /// <summary>
        /// Complete message.
        /// </summary>
        /// <param name="message"></param>
        public void CompleteMessage(ServiceBusReceivedMessage message)
        {
            receiver.CompleteMessageAsync(message).Wait();
        }

        /// <summary>
        /// Abandon message.
        /// </summary>
        /// <param name="message"></param>
        public void AbandonMessage(ServiceBusReceivedMessage message)
        {
            receiver.AbandonMessageAsync(message).Wait();
        }
    }
}

everything works well when I'm handling one message at a time, but if I would process two messages at a time for example I get this error:

"The lock supplied is invalid. Either the lock expired, or the message has already been removed from the queue, or was received by a different receiver instance"

And I think the "or was received by a different receiver instance" part is my problem.

Am I thinking about this the wrong way? shouldn't I be able to handle for example: abandoning multiple single received messages at a time?

Thanks in advance.

UPDATE:

So i thing i managed to get it working in regards to what Jesse Squire have been suggested to do in reflection to the new Servicebus ducumentation provided by microsoft.

I Made a new class called ServicebusFactory, added the code provided by Jesse below, to test it out and changed the "= new();" part for the initialized "ConcurrentDictionary's" at the top of the example, as initializing them like this resulted in the error below:

CS8400 Feature 'target-typed object creation' is not available in C# 8.0. Please use language version 9.0 or greater.

Result:

    public class ServiceBusFactory : IAsyncDisposable, IServiceBusFactory
    {
        private readonly ServiceBusClient _client;
        private readonly ConcurrentDictionary<string, ServiceBusSender> _senders = new ConcurrentDictionary<string, ServiceBusSender>();
        private readonly ConcurrentDictionary<string, ServiceBusReceiver> _receivers = new ConcurrentDictionary<string, ServiceBusReceiver>();

        public ServiceBusFactory(string fullyQualifiedNamespace, TokenCredential credential) => _client = new ServiceBusClient(fullyQualifiedNamespace, credential);
        public ServiceBusFactory(string connectionString) => _client = new ServiceBusClient(connectionString);

        public ServiceBusSender GetSender(string entity) =>
            _senders.GetOrAdd(entity, entity => _client.CreateSender(entity));

        public ServiceBusReceiver GetReceiver(string entity) =>
            _receivers.GetOrAdd(entity, entity => _client.CreateReceiver(entity));

        public async ValueTask DisposeAsync()
        {
            await _client.DisposeAsync().ConfigureAwait(false);
            GC.SuppressFinalize(this);
        }
    }
}

I then created an interface for my service bus factory and added this as a singelton to the bottom of my "ConfigurationService" method in my "Startup.cs" class, initializing it with my service bus connection string.

Interface:

public interface IServiceBusFactory
{
   public ServiceBusSender GetSender(string entity);

   public ServiceBusReceiver GetReceiver(string entity);

   public ValueTask DisposeAsync();
}

Startup:

var serviceBusConnectionString = "[CONNECTION STRING]";
services.AddSingleton<IServiceBusFactory>(new ServiceBusFactory(serviceBusConnectionString));

Finally it was a matter of dependency inject the servicebusFactory interface to my controller constructor and then use it to get a "sender" and using it to send a message to my queue called "Add".

Constructor:

private readonly IServiceBusFactory _serviceBusFactory;

public ServicebusController(IServiceBusFactory serviceBusFactory) 
{
    _serviceBusFactory = serviceBusFactory; 
}

Controller Method/Action implementation:

var test = new List<ServiceBusMessage>();
test.Add(new ServiceBusMessage("This is a test message."));

var sender = _serviceBusFactory.GetSender("Add");
sender.SendMessagesAsync(test);

ANSWER

Answered 2022-Feb-17 at 14:57

Service Bus associates a message lock with the AMQP link from which the message was received. For the SDK, this means that you must settle the message with the same ServiceBusReceiver instance that you used to receive it.

In your code, you're creating a new receiver for ReceiveMessage call - so when you attempt to complete or abandon the message, you're using a link for which the message is not valid if any other call to ReceiveMessage has taken place.

Generally, you want to avoid the pattern of creating short-lived Service Bus client objects. They're intended to be long-lived and reused over the lifetime of the application. In your code, you're also implicitly abandoning the senders/receivers without closing them. This is going to orphan the AMQP link until the service force-closes it for being idle after 20 minutes.

I'd recommend pooling your senders/receivers and keeping each as a singleton for the associated queue. Each call to SendMessage or ReceiveMessage should for a given queue should use the same sender/receiver instance.

When your application closes, be sure to close or dispose the ServiceBusClient, which will ensure that all of its child senders/receivers are also cleaned up appropriately.

I'd also very strongly recommend refactoring your class to be async. The sync-over-async pattern that you're using is going to put additional pressure on the thread pool and is likely to result in thread starvation and/or deadlocks under load.

UPDATE

To add some additional context, I'd advise not wrapping Service Bus operations but, instead, have a factory that focuses on managing clients and letting callers interact directly with them.

This ensures that clients are pooled and their lifetimes are managed correctly, while also giving flexibility to callers to hold onto the sender/receiver reference and use for multiple operations rather than paying the cost to retrieve it.

As an example, the following is a simple factory class that you'd create and manage as a singleton in your application. Callers are able to request a sender/receiver for a specific queue/topic/subscription and they'll be created as needed and then pooled for reuse.

// This class is intended to be treated as a singleton for most 
// scenarios.  Each instance created will open an independent connection
// to the Service Bus namespace, shared by senders and receivers spawned from it.

public class ServiceBusFactory : IAsyncDisposable
{
    // If throughput needs scale beyond a single connection, the factory can
    // manage multiple clients and ensure that child entities are evenly distributed
    // among them.
    
    private readonly ServiceBusClient _client;
    private readonly ConcurrentDictionary<string, ServiceBusSender> _senders = new();
    private readonly ConcurrentDictionary<string, ServiceBusReceiver> _receivers = new();

    public ServiceBusFactory(string fullyQualifiedNamespace, TokenCredential credential) => _client = new ServiceBusClient(fullyQualifiedNamespace, credential);
    public ServiceBusFactory(string connectionString) => _client = new ServiceBusClient(connectionString);

    public ServiceBusSender GetSender(string entity) =>
         _senders.GetOrAdd(entity, entity => _client.CreateSender(entity));

    public ServiceBusReceiver GetReceiver(string entity) =>
        _receivers.GetOrAdd(entity, entity => _client.CreateReceiver(entity));

    public async ValueTask DisposeAsync()
    {
        await _client.DisposeAsync().ConfigureAwait(false);
        GC.SuppressFinalize(this);
    }
}

Source https://stackoverflow.com/questions/71139902

QUESTION

How to represent communication protocol in UML?

Asked 2022-Jan-30 at 21:36

In my UML model I have a system and its subcomponents that talk to each other. For Example, I have a computer and a RC robot where they talk via Bluetooth. Currently in the diagrams the flow is something like:

"Computer" triggers "setVelocity()" function of "RC car".

At this point, I want to refine the communication by saying that

computer sends "Movement" message
with velocity field is set to 100 and direction field is set to 0
which is acknowledged by RC car by sending ACK message
with message id "Movement" and sequence number X.

How do I do that?

EDIT: Clarification

Normally this is what my diagram looks like without protocol details:

But when I tried to add messages, there are at least 2 problems:

It seems like Computer first triggered the setVelocity() funciton and then sendBluetoothMessage() sequentially which are not sequential . The followings of setVelocity() are actually what happens inside that.
sendBluetoothMessage() is actually a function of Computer. But here it belongs to RC Car. (or am I wrong?) And the same things for ACK.

Thanks for the responses. You are gold!

ANSWER

Answered 2022-Jan-29 at 17:48

Communication protocols in general

There are two main ways of representing the sending of a movement message between two devices:

A movement() operation on the target device, with parameters for the velocity and direction. You would typically show the exchange in a sequence diagram, with a call arrow from the sender to the receiver. The return message could just be label as ACK.
A «signal» Movement: Signals correspond to event messages. In a class diagram, they are represented like a class but with the «signal» keyword: velocity and direction would be attributes of that signal. ACK would be another signal. The classes that are able to receive the signals show it as reception (looks like an operation, but again with «signal» keyword).

In both cases, you would show the interactions of your communication protocol with an almost identical sequence diagram. But signals are meant for asynchronous communication and better reflect imho the nature of the communication. It's semantic is more suitable for your needs.

If you prefer communication diagram over interaction diagrams, the signal approach would be clearer, since communication diagrams don't show return messages.

Why signals is what you need (your edit)

With the diagrams, your edited question is much clearer. My position about the use of signals is unchanged: signals would correspond to the information exchanged between the computer and the car. So in a class diagram, you could document the «signal»Movement as having attributes id, velocity and direction:

In your sequence diagram, you'd then send and arrow with Movement (X,100,0). Signal allows to show the high level view of the protocol exchanges, without getting lost on the practical implementation details:

The implementation details could then be shown in a separate diagram. There are certainly several classes involved on the side of the computer (one diagram, the final action being some kind of sending) and on the side of the car (another diagram: how to receive and dispatch the message, and decode its content). I do not provide examples because it would very much look like your current diagram, but the send functions would probably be implemented by a communication controller.

If you try to put the protocol and its implementation in the same diagram, as in your second diagram, it gets confusing because of the lack of separation of concerns: here you say the computer is calling a send function on the car, which is not at all what you want. The reader has then difficulty to see what's really required by the protocol, and what's the implementation details. For instance, I still don't know according to your diagram, if setVelocity is supposed to directly send something to the car, or if its a preparatory step for sending the movement message with a velocity.

Last but not least, keep in mind that the sequence diagram represents just a specific scenario. If you want to formally define a protocol in UML, you'd need to create as well a protocol state machine that tells the valid succession of messages. When you use signals, you can use their name directly as state transition trigger/event.

Source https://stackoverflow.com/questions/70894418

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