''OpenESB'' is a Java-based

open-source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

enterprise service bus An enterprise service bus (ESB) implements a communication system between mutually interacting software applications in a service-oriented architecture (SOA). It represents a software architecture for distributed computing, and is a special varia ...

. It can be used as a platform for both enterprise application integration and service-oriented architecture. OpenESB allows developers to integrate legacy systems, external and internal partners and new development in business processes. It supports a multitude of integration technologies including standard JBI ( Java Business Integration),

XML Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. T ...

with support for

XML Schema An XML schema is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself. These constr ...

WSDL The Web Services Description Language (WSDL ) is an XML-based interface description language that is used for describing the functionality offered by a web service. The acronym is also used for any specific WSDL description of a web service (als ...

, and

BPEL The Web Services Business Process Execution Language (WS-BPEL), commonly known as BPEL (Business Process Execution Language), is an OASIS standard executable language for specifying actions within business processes with web services. Process ...

with the aim of simplicity, efficiency, long-term durability, and low TCO ( Total Cost of Ownership). It used to be owned by

Sun Microsystems Sun Microsystems, Inc. (Sun for short) was an American technology company that sold computers, computer components, software, and information technology services and created the Java programming language, the Solaris operating system, ZFS, th ...

, but after

Oracle An oracle is a person or agency considered to provide wise and insightful counsel or prophetic predictions, most notably including precognition of the future, inspired by deities. As such, it is a form of divination. Description The word ''o ...

and

merged (see:

Sun acquisition by Oracle The acquisition of Sun Microsystems by Oracle Corporation was completed on January 27, 2010. After the acquisition was completed, Oracle, only a software vendor prior to the merger, owned Sun's hardware product lines, such as SPARC Enterprise, a ...

), th
OpenESB Community
was created to maintain, improve, promote and support OpenESB.

Architecture

''OpenESB'' consists of 5 parts: the framework, the container, the components, the Integrated Development Environment and the development plugins. File:OpenESB main parts.jpg, OpenESB main parts File:JBI high level schema.jpg, JBI high level schema

Framework

The framework consists of a lightweight JBI implementation in Java. This implementation is container-agnostic and can work on any platform and any container. Even if development and support are mainly focused on Glassfish V2 and V3 platforms, beta projects on JBoss and standalone

JVM A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describes ...

work well and are in progress (2012 Q2). In addition to the OpenESB framework being lightweight, it is also reliable and highly scalable. It is embedded in a Java virtual machine and communicates with other framework instances through Binding components. This architecture matches perfectly with new cloud architectures and allows easy deployment and management on very complex infrastructures. The framework is fully manageable with any JMX-based tool such as Jconsole or more sophisticated tools like Opsview or Nagios. The framework implements a virtual bus known as the Normalised Message Router (NMR). This is a powerful asynchronous intelligent communication channel between components.

Components

The JBI specification defines 2 component types: The services engine (SE) and the binding component (BC). The SE and BC implement the same interface contract, however, they behave differently: - Binding components act as the interface between the outside world and the bus, being able to generate bus messages upon receipt of stimuli from an external source, or generate an external action/interaction in response to a message received from the bus. - Service engines receive messages from the bus and send messages to the bus. SE's have no direct contact with the outside world. They rely on the bus for interaction with other components, whether binding components or other service engines. ''OpenESB'' includes many Components 'out of the box'. OpenESB Binding Components OpenESB Service Engines

Integrated Development Environment & Plugins

OpenESB offers a set of graphical tools to ease complex SOA and integration developments. Powerful XLM, XML Schema, WSDL, BPEL editor, data mapping and Composition Applications graphical editors are proposed with OpenESB. Similarly, build, deploy, un-deploy, run, test and debug tasks are managed by graphical tools. OpenESB provides the best ergonomics for ESB and SOA developments. File:OpenESB XML schema editor 01.jpg, XSD Editor File:OpenESB WSDL editor 01.jpg, WSDL Editor File:OpenESB BPEL editor 01.jpg, BPEL Editor File:OpenESB Complex BPEL 01.jpg, Complex BPEL sample File:OpenESB Data Mapper 01.jpg, Data Mapper Editor File:OpenESB Composie Application Editor 01.jpg, Composite Application Editor

Container

OpenESB V3.1.2 does not use any container but just a JVM. So, its memory footprint is very low (less than 300 Mo) and allows OpenESB to run in a Raspberry PI or in a many instances on a cloud. Next versions are planned for 2019.

OpenESB community

The table below lists the web sites and forum managed by OpenESB community

References

{{reflist Java Business Integration
JBI specification

External links

OpenESB projectPymma OpenESB Enterprise Edition, Consulting, training, architecture design,development and Global 24x7 Support

LogiCoy OpenESB Development, Consulting and Global 24x7 SupportYoutube - NetBeans Open ESB SOA Tools, Composite Application, CASAQuick Start Guide to the NetBeans Open ESB CASA Editorhttps://soa.netbeans.org/
Integration platform Middleware Java enterprise platform