Middleware servers

The next three layers reside on an application middleware server, although in some systems, there is a further physical separation between the presentation layer, which runs on a different hardware from the domain and data access layers. If EJB is used in a J2EE application, the presentation layer runs on a Web container and the domain layer runs on an EJB container. With the EJB local interface in J2EE 1.3, the separation becomes unnecessary, which eliminates the network overhead between the two. 

The simulation request broker a sort of middleware server written in Java, whose main task is to synchronize concurrent client calls, transfer configuration data from... 

The technical architecture Apackage structure (for static dependencies) and collaborations (across technology components, such as UI, business object servers, and databases). These cover all domain-independent parts of the system hardware and software platforms infrastructure components such as middleware and databases utilities for logging, exceptions, start-up, and shutdown design standards and tools and the choice of... 

FIGURE 3.4 Three-dimensional MRTM simulation architecture. The multitiered architecture allows middleware programs to run inside a J2EE server and also provides web services to the users of the system. 

It is clear that one of the reasons ERP tools became so successful was that they were able to take advantage of improvements in the client/server architecture and in middleware. The general movement to the client/server platform in the late 1980s meant that firms could reduce the cost of a highly centralized configuration in favor of a more flexible client/server setup. The C/S configuration preferred by most ERP vendors is that of the standard three-tier C/S platform, which consists of a presentation server, connected to the application server, which is in turn connected to the database... 

In addition to these application-functional layers, some functions are needed to support interactions between clients and servers via networks. All the distributed software that supports interaction between application components and network software is called middleware. Middleware is a generic term for all the software components that allow us to connect separate layers or components and put them into a complete distributed system. It provides an application programming interface (API) that isolates application codes from the underlying network communication formats and protocols. It also supplies intermediate system services such as security, naming, directory, messaging, and transaction management services ... 

The need to filter RFID tag information is vital and usually can be done using a separate server in the RFID middleware or at the place where the reader is mounted. However in order to increase efficiency, reduce cost, and decrease potential points of failure in the network, it would be desirable if the reader itself is equipped with some computing power to facilitate information filtering before propagating an excessive large amount of data to RFID middleware or backend systems (e.g., ERP). New generation readers do offer such a facility like the IF5 Intellitag Fixed Reader, which is built on Linux platform, which... 

RFID middleware contributes a major portion of RFID investment. Many vendors supply RFID middleware, and the cost can vary depending upon the capabilities of the middleware. Usually factors that contribute to cost include complexity of the application and the number of places the middleware would be installed. Apart from the middleware, the companies should also consider the cost of edge servers, which are normally deployed in the warehouse, distribution center, or production facility. The edge servers are simple servers, which are connected to the RFID reader using a universal serial bus (USB) port. 

Middleware is the software used to network computers. It includes network-enabled operating systems and the underlying communications software, such as implementations of TCP/IP (transmission control protocol/Internet protocol), and router software, such as CISCO S lOS (originally Internetwork Operating System) software. Mainframe and server... 

The framework architecture is made up of two systems i) Instrumented System, and ii) Test and Collect. The former is the system in which the web service is running the latter is the system that is used to stimulate the web service and to collect evidences of its behavior. Although the current implementation focuses on Java Web Services running over a Tomcat 7 Application Server (AS) and a Linux CentOS 6 Operative System (OS), the proposed solution can be evolved to different platforms and Web Services Middleware (WSM). 

Middleware architecture is the replacement of Client/Server architecture. The Middleware is defined as 3-tier (or N-tier), while the traditional Client/Server is defined as 2-tier architecture. In this paper, we will highlight and focus on the Middleware concept rather than the 3-tier arehiteeture. 

Middleware tier is used to manage transactions in real time and mission critical application in distributed environment. The Middleware is the logical base of services of which all applications can use, and provides the ability to separate the business logic from the application structure so that allowing application developer to focus on the business logic not the infrastrueture. This separation makes it easy to introduce infrastructure ehanges aeross many applieations, rather than one at a time. Middleware is a separate process designed to provide the infrastructure service link between clients and servers in a distributed system. 

---