By Bruce Snyder, Dejan Bosanac, Rob Davies
Applications in organisations have to converse, most typically performed via messaging. Apache ActiveMQ is an open-source implementation of the Java Message provider (JMS), which supplies messaging in Java applications.
ActiveMQ in Action is a radical, sensible advisor to enforcing message-oriented structures utilizing ActiveMQ and Java. Co-authored via one of many top ActiveMQ builders, Bruce Snyder, the ebook begins with the anatomy of a middle Java message, then strikes speedy via basics together with information patience, authentication and authorization. Later chapters hide complex beneficial properties resembling configuration and function tuning, illustrating each one suggestion with a working 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 publication comes with a suggestion of a loose PDF, ePub, and Kindle e-book from Manning. additionally on hand is all code from the book.
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Extra info for ActiveMQ in Action
This must be installed prior to attempting this section. html. If you’re using Mac OS X, you should already have Java installed. com/java/ download/. Once you have the Java SE installed, you’ll need to test that it is set up correctly. To do this, open a terminal or command line and enter the command shown in the following listing. 3-b01-279, mixed mode) Your output may be slightly different depending on the operating system you’re using, but the important part is that there’s output from the Java SE.
1 are used to create queries against message headers and properties. Consider the message defined in the next listing. This message defines two properties that will be used for filtering messages in the example that follows. send(destination, textMessage); added to message Now let’s look at some examples of filtering messages via message selectors using the preceding message. 5 Filter messages using the SYMBOL header ... createConsumer(destination, selector); ... 5 defines a selector to match messages for Apple, Inc.
In fact, multiple instances of ActiveMQ could be used in what’s known as a network of brokers configuration. This would allow the ActiveMQ instances to be moved around without affecting either application A or application B. This means that any segment of this architecture can be taken down for maintenance at any time without taking down the entire system. More details about this are available in chapter 10. So ActiveMQ provides an incredible amount of flexibility in application architecture, allowing the concepts surrounding loose coupling to become a reality.