Software:OpenESB

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Short description: Open-source enterprise service bus
OpenESB
Developer(s)OpenESB Community, formerly Sun Microsystems
Stable release
v 3.2.4 [1] / June 1, 2020 (2020-06-01)
Preview release
v 3.1.4 [2] / March 1, 2019 (2019-03-01)
Written inJava
Operating systemCross-platform: Windows Mac OS Linux supported
TypeIntegration platform Microservice Enterprise Service Bus
LicenseCDDL
Websitehttp://www.open-esb.net/

OpenESB is a Java-based open-source enterprise service bus. 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 with support for XML Schemas, WSDL, and BPEL with the aim of simplicity, efficiency, long-term durability, and low TCO (Total Cost of Ownership).

It used to be owned by Sun Microsystems, but after Oracle and Sun Microsystems merged (see: Sun acquisition by Oracle), the OpenESB Community was created to maintain, improve, promote and support OpenESB.[citation needed]

Architecture

OpenESB consists of 5 parts: the framework, the container, the components, the Integrated Development Environment and the development plugins.

  • OpenESB main parts

  • 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 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

Binding Component Name Description Supported
HTTP BC Sends and receives messages through HTTP (get, post,...) Yes
SOAP BC Sends and receives SOAP messages through HTTP Yes
FTP BC Sends and receives messages from and to FTP servers Yes
Database BC Full access to Database through JDBC Yes
JMS BC Sends and Receives messages from and to JMS Brokers Yes
LDAP BC Full Access to LDAP server Yes
Email BC Receives message from POP, IMAP servers and send messages to SMTP server Yes
REST BC Exposes and Invokes services through REST channel Yes
HL7 BC Used to communicate with Healthcare applications using the HL7 protocol Yes
TCP/IP BC Use TCP/IP to send and receive messages Yes
Scheduler BC Scheduler based on Quartz to trigger any business process Yes
Bespoke BC You can develop your own Binding component On demand

OpenESB Service Engines

Service Engine Name Description Supported
BPEL SE Highly scalable orchestrator based on BPEL 2.0. Yes
XSLT SE Embedded XSLT in Business processes Yes
IEP SE Intelligent Event Processor yes
POJO SE Transform any Java class into an OpenESB component Yes
JEE SE Transform any EJB or Servlet into an OpenESB component Yes
WLM SE Provides task management and human intervention in a business process On demand
ETL SE ETL for OpenESB On demand
Bespoke SE You can develop your own Service engine Yes

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.

  • XSD Editor

  • WSDL Editor

  • BPEL Editor

  • Complex BPEL sample

  • Data Mapper Editor

  • 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

Web site Description
Community portal Info, Event Download, Documentation, Blog, Forum...
Sources repository All source code and builds: registration required
OpenESB community forum Technical forum with thousands of posts
OpenESB LinkedIn group Discussions on OpenESB

See also

References

Java Business Integration

JBI specification

External links



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