What is ActiveMQ topic?

What is ActiveMQ topic? ActiveMQ topic is a pipeline of messages where a message comes in and goes to every subscriber. Both ActiveMQ queue and ActiveMQ topic are places where messages are sent. The difference is in who receives the message.

What is ActiveMQ advisory topic? ActiveMQ supports advisory messages which allows you to watch the system using regular JMS messages. Currently we have advisory messages that support: consumers, producers and connections starting and stopping. messages expiring on topics and queues. brokers sending messages to destinations with no consumers.

What is a durable topic? Once a client registers to receive messages for a topic, a durable topic keeps messages for that client when the client is disconnected.

What is ActiveMQ and how it works? Apache ActiveMQ is message-oriented middleware (MOM), a category of software that sends messages between applications. Using standards-based, asynchronous communication, ActiveMQ allows loose coupling of the elements in an IT environment, which is often foundational to enterprise messaging and distributed applications.

What is ActiveMQ topic? – Related Questions

What is ActiveMQ Dlq?

The default Dead Letter Queue in ActiveMQ is called ActiveMQ. DLQ ; all un-deliverable messages will get sent to this queue and this can be difficult to manage. xml configuration file, which allows you to specify a specific dead letter queue prefix for a given queue or topic.

What is Apache ActiveMQ Artemis?

Apache ActiveMQ is an open source message broker written in Java together with a full Java Message Service (JMS) client. There’s another broker under the ActiveMQ umbrella code-named Artemis. It is based on the HornetQ code-base which was donated from the JBoss community to the Apache ActiveMQ community in 2015.

What is durable message?

A durable subscriber is a message consumer that receives all messages published on a topic, including messages published while the subscriber is inactive.

How do you make a topic durable?

To create a durable topic subscriber, a topic subscription (that is, a durable topic endpoint) must be provisioned on the event broker. This durable topic subscription serves to attract messages published to the topic. Only one Session at a time can use a topic subscriber for a particular durable subscription.

What is JMS type?

JMS defines six message interface types; a base message type and five subtypes. This message type is useful for exchanging data in a format that is native to the application, and when JMS is used as a transport between two systems, where the JMS client does not know the message payload type.

Why is ActiveMQ used?

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.

What is Kafka used for?

Kafka is often used for operational monitoring data. This involves aggregating statistics from distributed applications to produce centralized feeds of operational data.

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.”

How does JMS topic work?

A topic goes to each and every subscriber. Topics are for the publisher-subscriber model, while queues are for point-to-point. A JMS topic is the type of destination in a 1-to-many model of distribution. The same published message is received by all consuming subscribers.

What is ActiveMQ destination?

Destination Options are a way to provide extended configuration options to a JMS consumer without having to extend the JMS API. The options are encoded using URL query syntax in the destination name that the consumer is created on.

How do I view ActiveMQ queue?

You can view the queue depth using the MBeans in ActiveMQ 5. x. Use any JMX management console to see the statistics.

What is JMSXDeliveryCount?

The JMSXDeliveryCount message property provides a count value for the number of times that a particular message is delivered. You can use this property in your application to identify poison messages by establishing a threshold value for the delivery count.

How do you handle Dlq?

Start examining the messages that went to the Dead Letter Queue. Try and re-process the messages to determine the underlying cause of the failure (but sometimes it is a random failure that you cannot reproduce) Once a cause is found, update the system to handle that particular use-case, then move onto the next cause.

What are dead letter messages?

A dead-letter queue (DLQ), sometimes referred to as an undelivered-message queue, is a holding queue for messages that cannot be delivered to their destination queues, for example because the queue does not exist, or because it is full.

What is the difference between Kafka and ActiveMQ?

Kafka is way faster than ActiveMQ. It can handle millions of messages per sec. ActiveMQ supports both message queues and publishes/subscribe messaging systems. On the other hand, Kafka is based on publish/subscribe but does have certain advantages of message-queues.

What is Artemismq?

Apache ActiveMQ Artemis is an open source project for an asynchronous messaging system. It is high performance, embeddable, clustered and supports multiple protocols. JBoss EAP 7 uses Apache ActiveMQ Artemis as its JMS broker and is configured using the messaging-activemq subsystem.

What is the 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.

What is durable topic JMS?

A durable subscriber registers a durable subscription by specifying a unique identity that is retained by the JMS provider. If a durable subscription has no active subscriber, the JMS provider retains the subscription’s messages until they are received by the subscription or until they expire.

What is subscriber JMS?

The JMS Subscriber receives notifications from topics and relays them to Java Message System (JMS)-compliant message brokers, such as IBM WebSphere MQ.

What is durable topic in Tibco?

What is TIBCO EMS Durable Subscriber? Durable subscribers to a EMS topic are those subscribers which are entitled to receive a message published to a topic once they are alive and ready to consume; even if they were not active when the message was published by the publisher to that topic.

How do I get JMS message body?

If the message body is a text message (Plain text or XML), it can be extracted like the following. String msgBody = ((TextMessage) message). getText(); The JMS 2.0 API exposes the additional method T getBody(Class c) in the Message interface.