Habari Client for Artemis is a high-level, object-oriented STOMP client library for Delphi and Free Pascal which provides access to the Apache ActiveMQ Artemis free open source Message Broker.
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With this library, developers can build integrated solutions, connecting cross language clients and protocols, using the peer-to-peer or the publish-and-subscribe communication model.favorite_border
It is easy to configure and provides a high-level API and programming model, based on connections, sessions, destinations, message producers, and message consumers.filter_list
The library uses the STOMP protocol for its communication with the message broker. Supported STOMP protocol version levels are 1.0, 1.1 and 1.2.Habari Client libraries support several broker-specific extensions of the STOMP protocol standard. Please note that library support for broker-specific extensions may be limited or incompatible across clients and broker versions.
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By default, a message never expires. If a message will become obsolete after a certain period, however, you may want to set an expiration time for the message.
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A client can specify a priority for each message it sends. Message priorities affect the order in which the messages are delivered to the consumers.
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Brokers support reliable messaging by allowing messages to be persisted so that they can be recovered if there is failure which kills the broker.
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Even if the client which created the durable subscription is not online, he can still get a copy of all the messages sent to the topic when he comes back online.
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Binary and text messages can be exchanged between STOMP and non-STOMP clients. (Object and map messages are exchanged as text messages)
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If you want to browse all the messages on a queue in a non-destructive fashion, you can create a browsing subscription. (Only supported by Apache ActiveMQ and Artemis)
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Message selectors allow a subscription to only receive a subset of the messages sent to a destination. (Not supported by RabbitMQ)
Released 20 February 2021
Read the "Getting Started" user guide for Habari Client for Artemis
Browse the online API documentation for Habari Client for Artemis
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Code for sending (producing) and receiving (consuming) messages:
procedure TNewApiTests.TestSendMessage; var Factory: IConnectionFactory; Context: IMQContext; Destination: IQueue; Producer: IMQProducer; Consumer: IMQConsumer; TextMessage: ITextMessage; begin Factory := TBTConnectionFactory.Create; Context := Factory.CreateContext; try Destination := Context.CreateQueue(GetQueueName); Producer := Context.CreateProducer; Producer.Send(Destination, 'Hello World'); Consumer := Context.CreateConsumer(Destination); TextMessage := Consumer.Receive(2500) as ITextMessage; CheckEquals('Hello World', TextMessage.Text); finally Context.Close; end; end;
Code for sending (producing) messages:
// Getting connection from the server and starting it ConnectionFactory := TBTConnectionFactory.Create; try Connection := ConnectionFactory.CreateConnection; Connection.Start; // Messages are sent and received using a Session. We will // create here a non-transactional session object. If you want // to use transactions you should set the first parameter to 'true' Session := Connection.CreateSession(False, amAutoAcknowledge); // Destination represents here our queue 'ExampleQueue' on the // server. You don't have to do anything special on the // server to create it, it will be created automatically. Destination := Session.CreateQueue('ExampleQueue'); // MessageProducer is used for sending messages (as opposed // to MessageConsumer which is used for receiving them) Producer := Session.CreateProducer(Destination); // We will send a small TextMessage saying 'My hovercraft is full of eels' in Mandarin: TextMessage := Session.CreateTextMessage("我的氣墊船裝滿了鱔魚"); // Here we are sending the message Producer.Send(Message); finally Connection.Close; end;
Code for receiving (consuming) messages:
// Getting connection from the server and starting it ConnectionFactory := TBTConnectionFactory.Create; try Connection := ConnectionFactory.CreateConnection; Connection.Start; // Messages are sent and received using a Session. We will // create here a non-transactional session object. If you want // to use transactions you should set the first parameter to 'true' Session := Connection.CreateSession(False, amAutoAcknowledge); // Destination represents here our queue 'ExampleQueue' on the // server. You don't have to do anything special on the // server to create it, it will be created automatically. Destination := Session.CreateQueue('ExampleQueue'); // MessageConsumer is used for receiving messages (as opposed // to MessageProducer which is used for sending them) Consumer := Session.CreateConsumer(Destination); // We will try to receive send a TextMessage within 5 seconds: TextMessage := Consumer.Receive(5000); WriteLn(TextMessage.Text); finally Connection.Close; end;
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Full library source code included
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Apache ActiveMQ Artemis High-performance, non-blocking architecture for the next generation of event-driven messaging applications.
- JMS 1.1 & 2.0 with full client implementation including JNDI
- High availability using shared storage or network replication
- Simple & powerful protocol agnostic addressing model
- High feature parity with ActiveMQ 5 to ease migration
WildFly 10 (released in January 2016) includes Artemis as its JMS broker, and due to the protocol compatibility, it fully replaces the HornetQ project.
https://activemq.apache.org/components/artemis/