Download RabbitMQ Essentials by David Dossot PDF

By David Dossot

RabbitMQ is particularly other kinds of message queuing software program due to its loosely coupled structure and its skill to bind a number of languages, making glossy net functions safe, scalable, and easy to maintain.

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The user experience will be altered accordingly. spring. org/ connectors/amqp-connector), or Beetle (https://github. com/xing/beetle). CCM wants to learn the basics and underlying mechanisms for itself and so do we; hence, we will not use any of them in this book. Consider using them in your projects. Let's now detail the implementation of the RabbitMqManager class created to reify this behavior. com Creating an Application Inbox The goal of the RabbitMqManager class is to babysit a single connection to RabbitMQ.

Done. RabbitMQ comes with a default vhost named / on which the guest user has full permissions. Though this is convenient for quick tests, we recommend that you create dedicated vhosts in order to keep concerns separated so that it is possible to completely drop a vhost and restart from scratch without unexpected impacts. As it currently is, neither the ccm-admin nor ccm-dev users have permission to do anything on ccm-dev-vhost. done. done. What have we just done? *" part looks a tad mysterious, so let's analyze it.

GetPort(), cause); connection = null; asyncWaitAndReconnect(); } } The important aspects here are that we only try a reconnection if the connection shutdown was not initiated by the application, which happens on a normal application termination, and that we reconnect asynchronously in order to avoid mobilizing the RabbitMQ client thread that called the shutdownCompleted method. SEVERE, "Failed to close connection", e); } finally { connection = null; } } Again, nothing complex here. After issuing a termination of the executor in charge of running the reconnection attempts, the connection itself is cleanly disposed of; all this in the context of Java's verbose but mandatory exception-handling mechanism.

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