By Bruce Snyder, Dejan Bosanac, Rob Davies
Applications in corporations have to converse, most typically performed by means of messaging. Apache ActiveMQ is an open-source implementation of the Java Message carrier (JMS), which gives messaging in Java applications.
ActiveMQ in Action is a radical, functional advisor to enforcing message-oriented structures utilizing ActiveMQ and Java. Co-authored by way of one of many prime ActiveMQ builders, Bruce Snyder, the publication begins with the anatomy of a center Java message, then strikes fast via basics together with facts patience, authentication and authorization. Later chapters conceal complex good points comparable to configuration and function tuning, illustrating every one notion with a operating real-world inventory portfolio application.
Readers will discover ways to combine ActiveMQ with Apache Geronimo and JBoss, and tie into either Java and non-Java applied sciences together with AJAX, .NET, C++, Ruby, and the Spring framework.
buy of the print ebook comes with a suggestion of a loose PDF, ePub, and Kindle publication from Manning. additionally on hand is all code from the book.
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Additional info for ActiveMQ in Action
The JMS specification 27 JMSPriority—Used to assign a level of importance to a message. This header is also set on the message producer. Once the priority is set on a producer, it applies to all messages sent from that producer. The priority can be overridden for individual messages. JMS defines 10 levels of message priority, ranging from 0 (the lowest) to 9 (the highest): * Priorities 0–4—These priorities are finer granularities of the normal priority. * Priorities 5–9—These priorities are finer granularities of expedited priority.
2 When to use ActiveMQ There are many occasions where ActiveMQ and asynchronous messaging can have a meaningful impact on a system architecture. Here are just a few example scenarios: Heterogeneous application integration—The ActiveMQ broker is written using the Java language, so naturally a Java client API is provided. NET, Perl, PHP, Python, Ruby, and a few other languages. This is a huge advantage when considering how you might integrate applications written in different languages on different platforms.
Many of the headers are automatically assigned. The following list describes each of these headers, and how they are assigned to the message. Headers JMSCorrelationID JMSDeliveryMode JMSDestination JMSExpiration JMSMessageID JMSPriority JMSRedelivered JMSReployTo JMSTimestamp JMSType ... 5 A graphical representation of a JMS message 26 CHAPTER 2 Understanding message-oriented middleware and JMS Headers set automatically by the client’s send() method: JMSDestination—The destination to which the message is being sent.
ActiveMQ in Action by Bruce Snyder, Dejan Bosanac, Rob Davies