Habari STOMP Client libraries enable Object Pascal applications to take advantage of message broker / message queue technology - which is distributed, loosely coupled, reliable and asynchronous - to build integrated systems, using peer-to-peer and publish-subscribe communication models.
The libraries are available for the open source message brokers ActiveMQ, ActiveMQ Artemis, Eclipse OpenMQ and RabbitMQ. ActiveMQ, ActiveMQ Artemis and OpenMQ are also serving as default messaging subsystems in Enterprise Application Servers such as GlassFish, Payara, TomEE+ or WildFly.
Typical use cases of message brokers include: load balancing (distributed processing), client notification in multi-tiered applications, dynamically configuring and controlling software, alerting and logging, and integration with ISAPI, PHP, .NET, Python or Jakarta EE based web applications.
Connects to a local broker instance with default port and credentials, and sends a text message. This example uses the new, simplified API.
function CreateLocalMQContext: IMQContext; var Factory: IConnectionFactory begin Factory := TBTConnectionFactory.Create; Result := Factory.CreateContext; end; procedure SendHelloWorld; var Ctx: IMQContext; Destination: IDestination; Producer: IMQProducer; begin Ctx := CreateLocalMQContext; try Destination := Ctx.CreateQueue('hello_world'); Producer := Ctx.CreateProducer; Producer.Send(Destination, 'Hello, World!'); finally Ctx.Close; end; end;
Connects to a remote broker instance with specified credentials, and receives a text message. This example uses the new, simplified API.
function CreateRemoteMQContext: IMQContext; var Factory: IConnectionFactory begin Factory := TBTConnectionFactory.Create('alice'); Result := Factory.CreateContext('username', 'password'); end; procedure ReceiveHelloWorld; var Ctx: IMQContext; Destination: IDestination; Consumer: IMQConsumer; TextMessage: ITextMessage; begin Ctx := CreateRemoteMQContext; try Destination := Ctx.CreateQueue('hello_world'); Consumer := Ctx.CreateConsumer(Destination); TextMessage := Consumer.Receive(2500) as ITextMessage; if Assigned(TextMessage) then ShowMessage(TextMessage.Text); finally Ctx.Close; end; end;
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The libraries are specialized for different message brokers, but share a common high-level API.
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Use the feature matrix below to compare the broker-specific capabilities and extra features.
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For information on a specific library, choose a version from the top menu or in the matrix header below.
| Version | Habari STOMP Client for ActiveMQ | Habari STOMP Client for Artemis | Habari STOMP Client for OpenMQ | Habari STOMP Client for RabbitMQ |
|---|---|---|---|---|
| STOMP version support | ||||
| Version 1.0 / 1.1 / 1.2 | ✓/✓ ②/✓ | ✓/✓ ②/✓ | ✓/ ①/✓ | ✓/✓ ②/✓ |
| STOMP optional features | ||||
| Ack Mode: auto/client/client-individual | ✓/✓/✓ | ✓/✓/✓ | ✓/✓/✓ | ✓/✓/✓ |
| Receipt Requests | ✓ | ✓ | ✓ | ✓ |
| Heart-beating | ✓ | ✓ | ① #361 | ✓ |
| Transacted Send | ✓ | ✓ | ✓ | ✓ |
| Transacted Ack | ✓ | ① | ① | ✓ |
| Broker-provided STOMP extensions | ||||
| Message Expiration | ✓ | ✓ | ✓ | ✓ |
| Message Priority | ✓ | ✓ | ✓ | ✓ |
| Persistent Messages | ✓ | ✓ | ✓ | ✓ |
| Rich Message Conversion | ✓ | ✓ | ✓ | ✓ |
| Topic Destinations | ✓ | ✓ | ✓ | ✓ |
| Queue Destinations | ✓ | ✓ | ✓ | ✓ |
| Durable Topics | ✓ | ✓ | ✓ | ✓ |
| Temporary Queues | ✓ | ① ARTEMIS-3164 | ✓ #1534 (closed) | ✓ |
| Message Selector | ✓ | ✓ | ✓ | ① |
| Queue Browser | ✓ | ✓ | ① | ① |
| Client-side extensions | ||||
| Failover Protocol | ✓ ② | ✓ ② | ✓ ② | ✓ ② |
| Connection Builder | ✓ ② | ✓ ② | ✓ ② | ✓ ② |
| Testing | ||||
| DUnit Tests | ✓ | ✓ | ✓ | ✓ |
| FPCUnit Tests | ✓ | ✓ | ✓ | ✓ |
| Unit test source code | ✓ | ✓ | ✓ | ✓ |
| Documentation | ||||
| API (HTML) | ✓ | ✓ | ✓ | ✓ |
| Getting started (PDF) | ✓ | ✓ | ✓ | ✓ |
| Example code | ✓ | ✓ | ✓ | ✓ |
| Compiler | ||||
| Delphi 2009+ | ✓ | ✓ | ✓ | ✓ |
| Free Pascal 3.2.0+ | ✓ | ✓ | ✓ | ✓ |
| TCP/IP libraries | ||||
| Internet Direct (Indy) 10.6.2 | ✓ | ✓ | ✓ | ✓ |
| Ararat Synapse | ✓ ② | ✓ ② | ✓ ② | ✓ ② |
| Synopse mORMot 1 | ✓ ② | ✓ ② | ✓ ② | ✓ ② |
| Synopse mORMot 2 | ✓ ② | ✓ ② | ✓ ② | ✓ ② |
| TLS/SSL support | ② | ② | ② | ② |
| Logging | ||||
| SLF4P logging facade | ✓ | ✓ | ✓ | ✓ |
| Platforms | ||||
| Linux 32/64 Bit (Delphi/FPC) | ②/✓ | ②/✓ | ②/✓ | ②/✓ |
| Windows 32 Bit (Delphi/FPC) | ✓/✓ | ✓/✓ | ✓/✓ | ✓/✓ |
| Windows 64 Bit (Delphi/FPC) | ②/✓ | ②/✓ | ②/✓ | ②/✓ |
| Other platforms | ② | ② | ② | ② |
| Additional information | ||||
| Source included | ✓ | ✓ | ✓ | ✓ |
| Tested with | ActiveMQ 5.17.3 | ActiveMQ Artemis 2.28.0 | Eclipse OpenMQ 6.3.0 and 6.4.0-SNAPSHOT | RabbitMQ 3.10.17 and 3.11.8 |
| Release date | 11 February 2023 | 11 February 2023 | 11 February 2023 | 11 February 2023 |
| Buy now » | Buy now » | Buy now » | Buy now » | |
|
① - Not supported by message broker STOMP implementation ② - Limited support, complimentary and/or experimental feature |
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Typical use cases of message brokers include: load balancing (distributed processing), client notification in multi-tiered applications, dynamically configuring and controlling software, alerting and logging, and integration with ISAPI, PHP, .NET, Python or Jakarta EE based web applications.
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Yes! Basic support is included for one year. Advanced and experimental features such as (for example) SSL/TLS, third party libraries, Linux, non-Unicode Delphi versions and message broker configuration are not covered by the basic support plan.
On the library home page you will find a link to the download area for registered users. The credentials (user name and password) will be sent to you when a new release is available.
A trial version with precompiled units (DCU) is not available. To see if the library works, you may use the free demo applications which are included in the demo download file. Also, you may contact Habarisoft to receive additional source or binary code examples.
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Yes, each developer that uses our products must have their own license.
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No, the licenses are perpetual. However, you will be using the last product version released before your free upgrade period expired.
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No, the source code is not redistributable, even if you change it.
Only a network library is required. Please check the feature matrix for available options.
Indy is hosted on GitHub at https://github.com/IndySockets
No, just add the Indy directories Lib\Core, Lib\Protocols and Lib\System to the project search path. The Indy version which is included in Delphi may remain unchanged.
The library includes two experimental adapter classes for usage with OpenSSL, one for Indy (Internet Direct) and one for Synapse. Technical support for these adapter classes and OpenSSL configuration is not included in the basic support package.
No, using a connection concurrently by different threads is unsafe. If different threads need to communicate with the message broker, every thread must use its own IConnection object.
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Yes! When it is used correctly and as designed, no memory leaks will appear.
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Yes! Service applications can use the library to communicate with the message broker, if connections are not used concurrently by different threads.
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Yes! ISAPI DLL modules can use the library to communicate with the message broker, if connections are not used concurrently by different threads.
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Yes! All library versions include support for transactional sending of messages. Transactional message ack currently is provided for ActiveMQ and RabbitMQ.
No, the library only supports the Stomp wire format.
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