This book shows you how to write programs for the MRG Messaging component of the Red Hat Enterprise MRG distributed computing platforming using the Apache Qpid API. It also gives basic information on downloading and installing MRG Messaging. For more complete information on how to download and install MRG Messaging see the MRG Messaging Installation Guide.
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The Java language has revolutionized the way we program applications for the Internet. Two great ideas make this language so promising:
• Applications written using Java run on multiple different platforms.
• Automatic memory management or garbage collection (GC) comes as a great relief for developers.
Other than these two issues, most of the remaining Java features can be implemented using the majority of other languages. Since its first public release in 1995, the Java language has been maturing and consolidating its position in the market as an increasing number of organizations realize its built-in strengths.
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The EPICS toolkit consists of a set of software components with which Application Developers can create a control system. The basic component types are:
•OPI
Operator Interface. A UNIX- or NT-based workstation or PC which can run various EPICS tools—the “clients.”
•IOC
Input Output Controller. A VME/VXI-based chassis containing a Motorola 68K or PPC processor with various VME I/O modules for analog and digital signals, and for access to field buses such as Allen-Bradley, GPIB, CANbus or CAMAC.
•LAN
TCP/IP-based Local Area Network. A communication network which connects the IOCs and OPIs. EPICS provides a software com- ponent, Channel Access, which provides network transparent commu- nication between every client—such as OPI—and an arbitrary number of servers—such as IOC.
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The C language was development at Bell Labs in the early 1970’s by Dennis Ritchie and Brian Kernighan. One of the first platforms for implementation was the PDP-11 running under a UNIX environment. Since its introduction, it has evolved and been standardized throughout the computing industry as an established development language. The PC has become a cost effective development platform using C++ or other favored versions of the ANSI standard.
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Everybody who wants to install a web server database but does not know which software is necessary and how it is installed should benefit from reading this text. This text provides all information necessary to get a SQL database for a web server going; it does not go into any detail of CGI programming, nor does it explain the SQL database language. Excellent books are available on both topics, and it is the intention of this text to provide a working platform based on which a user can then study CGI programming and SQL. For getting a small scale SQL system running (not the notorious example of a major airline booking system, or space mission management database) it will be sufficient to have the software described in this text and the documentation accompanying it. The user manual of msql (a database introduced in this text) provides sufficient information on SQL for building your own database.
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NASA Image2000 is an image processing software package available on multiple platforms, designed to bring high-end scientific image processing capabilities to the standard desktop computer. (See Minimum Specifications in Section 1.2 for limitations for Mac and Unix operating systems.) Developed to meet the needs of educators, NASA Image2000 supports the display, analysis and processing of satellite imagery.
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MySQL and Perl have been around for quite a while. They are still widely used even if the “fashion” is changing. This article talks about these two products working together as a whole, either on the Internet or on your local network. The provided example is written for Unix systems, free or not, even if it can be adapted to other widespread “systems”.
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Over the course of this book, it will be my job to guide you as you take your first steps beyond the HTML world of client-side site design. Together, we’ll explore what it takes to develop the kind of large, content-driven sites that are so successful today, but which can be a real headache to maintain if they aren’t built right. Before we get started, you need to gather together the tools you’ll need for the job. In this first chapter, I’ll guide you as you download and set up the two software packages you’ll need: PHP and MySQL.
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