B2B Integration : A Practical Guide to Collaborative E-commerce

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Integration Patterns 79 Messaging APIs — Messaging APIs provide a flexible message oriented interface that enables communication between message-based applications. The API makes it easy for enterprises to write business applications that asynchronously send and receive critical business data and events. For instance, the Java API for XML Messaging (JAXM) enables applications to send and receive document oriented XML messages using a pure Java API. With the use of JAXM, application developers can focus on building, sending, receiving and decomposing messages for their applications instead of programming low level XML communications routines. Component/Object APIs — Object APIs provide interfaces that can be used by applications to access different objects, which encapsulate the data and business processes. Several vendors of distributed component solutions such as DCOM, CORBA and EJB provide APIs to access remote objects. Data Management APIs — Data management APIs provide interfaces containing methods for directly accessing and manipulating an application's database or any other data source, internal or external to the company. This API should not only allow the retrieval of downloaded data or data in databases, it should also support data management activities common to most applications. This API enables data management applications to be integrated much like ordinary software applications, as it provides a consistent, platform-independent interface for integration. A typical example of data management API is structured query language (SQL). Each database vendor implements and supports its own flavor of SQL. For example, Oracle provides PL/SQL, Sybase provides transact SQL. Sun's JDBC API is a Java API for accessing tabular data which makes it easy to send SQL statements to relational database systems and supports all dialects of SQL (see Figure 3.22). The JDBC API consists of a set of classes and interfaces written in the Java programming language that provides a standard API for tool/database developers and makes it possible to write database applications using an all-Java API. The JDBC API contains two major sets of interfaces: the first is the
80 B2B Integration — A Practical Guide to Collaborative E-commerce r JDBC JDBC-ODBC Bridge Driver Database Client Library t Database Server Java Application "W" JDBC API Driver Manager or DataSource Object 1 Partial Java JDBC Driver Database Client Library Database Server Figure 3.22. — JDBC API — An example of data management API JDBC API for application writers and the second is the lower-level JDBC driver API for driver writers. File APIs — File APIs provide interfaces containing methods to manage file information, access data and catch events from legacy applications, which usually contain data in flat files. The interface encapsulates many of the advanced file and shell related functions. Applications can use file APIs to extract particular data elements from the legacy system. The API will take care of any logic or arithmetic needed to produce the desired data. Without this API, integration of legacy systems would be a nightmare, as they do not
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Chapter 2 Components, Benefits, Cha
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Chapter Q Extensible Markup Languag
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Chapter Q Integration Brokers The f
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Chapter "] 2 Wireless Technologies
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Company Brience Everypath GadgetSpa
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Chapter "] 5 E-Marketplaces and Col
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