What is Queue and Topic in ActiveMQ?
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Asked by: William Henderson
Both ActiveMQ queue and ActiveMQ topic are places where messages are sent. The difference between ActiveMQ Queue and Topic comes down to who receives the message.
What is a queue and a topic?
Queues and Topics are similar when a sender sends messages, but messages are processed differently by a receiver. A queue can have only one consumer, whereas a topic can have multiple subscribers.
What is JMS queue and Topic?
A JMS destination is an object (a JMS queue or a JMS topic) that represents the target of messages that the client produces and the source of messages that the client consumes. In point-to-point messaging, destinations represent queues; in publish/subscribe messaging, destinations represent topics.
What is topic and queue in Solace?
Guaranteed messages are stored in event broker endpoints. There are two types of endpoints: queues and topic endpoints. In most scenarios the queue endpoint is a superset of the topic endpoint, and is the endpoint most commonly used. Topic endpoints are used by JMS (that is, durable topic subscriptions).
What are topics in messaging?
A topic is the subject of the information that is published in a publish/subscribe message. Messages in point-to-point systems are sent to a specific destination address. Messages in subject-based publish/subscribe systems are sent to subscribers based on the subject that describes the contents of the message.
How does ActiveMQ queue work?
How does ActiveMQ work? Written in Java, ActiveMQ translates messages from sender to receiver. It can connect multiple clients and servers and allows messages to be held in queue, instead of requiring both the client and server to be available simultaneously in order to communicate.
How does MQ topic work?
Published information is sent in an IBM MQ message, and the subject of the information is identified by its topic. The publisher specifies the topic when it publishes the information, and the subscriber specifies the topics about which it wants to receive publications.
What is a virtual topic?
Virtual topics are a combination of topics and queues. Producers will write messages to a topic while listeners will consume from their own queue. ActiveMQ will copy and duplicate each message from the topic to the actual consumer queues.
What is JMS and MQ?
JMS is the specification provided by Sun for messaging. MQ Queue is the IBM’s implementation of JMS. Similary JBoss has its own implementation. JMS Queue is the generic term. MQ Queue is the concrete implementation provided by IBM.
What is JMS queue?
JMS queue. A staging area that contains messages that have been sent and are waiting to be read (by only one consumer). As the name queue suggests, the messages are delivered in the order sent. A JMS queue guarantees that each message is processed only once.
What is topic in Java?
It is the way a client specifies the identity of a topic to JMS API methods. For those methods that use a Destination as a parameter, a Topic object may used as an argument . For example, a Topic can be used to create a MessageConsumer and a MessageProducer by calling: Session. CreateConsumer(Destination destination)
What is difference between JMS and ActiveMQ?
What Is the Difference Between JMS and ActiveMQ? ActiveMQ is a JMS provider. A JMS provider forms the software framework for facilitating the use of JMS concepts inside an application. A single node of ActiveMQ which allows clients to connect to it and use these messaging concepts is called an “ActiveMQ Broker.”
What is full form of JMS?
Java Message Service (JMS)
What is the difference between JMS and Kafka?
Kafka and JMS are designed for different purposes. Kafka is a distributed streaming platform that offers high horizontal scalability. Also, it provides high throughput and that’s why it’s used for real-time data processing. JMS is a general-purpose messaging solution that supports various messaging protocols.
What does ORM stand for?
ORM
| Acronym | Definition |
|---|---|
| ORM | Object Relational Mapping |
| ORM | OSI (Open Systems Interconnection) Reference Model |
| ORM | Online Reputation Management |
| ORM | Object Relational Mapper |
What are the components of JMS?
Components of the JMS Architecture
- Message producers.
- Message consumers.
- JMS messages.
- Administered JMS objects.
- JNDI naming service.
What is delivery mode in JMS?
The delivery modes supported by the JMS API are PERSISTENT and NON_PERSISTENT . A client marks a message as persistent if it feels that the application will have problems if the message is lost in transit. A client marks a message as non-persistent if an occasional lost message is tolerable.
Is JMS an API?
What Is the JMS API? The Java Message Service is a Java API that allows applications to create, send, receive, and read messages.
Is JMS a protocol?
Decision Server Insights can receive and send events in the form of JMS text messages or JMS bytes messages. The messaging provider can be either WebSphere® MQ or WebSphere Application Server.
What is AMQP and JMS?
So the main difference is that JMS is an API which is implemented by Java EE/ Jakarta EE compliant application servers. On the other hand, AMQP is not an API but a binary wire protocol that has been designed for interoperability between different vendors and platforms.
What port does JMS use?
The default JMS port number is 9127.
What is difference between RabbitMQ and ActiveMQ?
ActiveMQ is used in enterprise projects to store multiple instances and supports clustering environments based on the JMS messaging specification. RabbitMQ is a message broker which is executed in low-level AMQP protocol and acts as an intermediator between two application in the communication process.
Is ActiveMQ push or pull?
ActiveMQ will push as many messages to the consumer as fast as possible, where they will be queued for processing by an ActiveMQ Session. The maximum number of messages that ActiveMQ will push to a Consumer without the Consumer processing a message is set by the pre-fetch size.
What is Kafka queue?
What are Apache Kafka Queues? In the Apache Kafka Queueing system, messages are saved in a queue fashion. This allows messages in the queue to be ingested by one or more consumers, but one consumer can only consume each message at a time.
