Apache Synapse is designed to be a simple, lightweight and high performance Enterprise Service Bus (ESB) from Apache. Based on a small asynchronous core, Apache Synapse has excellent support for XML and Web services - as well as binary and text formats. The Synapse engine is configured with a simple XML format and comes with a set of ready-to-use transports and mediators. We recommend you start by reading the QuickStart and then trying out the samples. Synapse is made available under the Apache Software License 2.0.
In December 2007, Apache Synapse became a top level project (TLP) of the Apache Software Foundation.
For more information, see:
Synapse has a completely asynchronous core, and supports non-blocking HTTP and HTTPS using the excellent Apache HttpCore NIO module. In addition, Synapse supports JMS v1.0 and higher, Apache VFS File Systems (FTP, SFTP, File (including zip/jar/tar/gz), Webdav, CIFS), POP3/IMAP/SMTP transports. Apache Synapse can process SOAP 1.1/1.2, pure XML/REST, Text and Binary messages with support for any-to-any conversion and transformation.
The latest release of Synapse is 1.1.1. Its key features are
Proxy services - facilitating transport, interface (WSDL/Schema/Policy), message format (SOAP 1.1/1.2, POX/REST, Text, Binary), QoS (WS-Security/RM) and optimization switching (MTOM/SwA)
Non-blocking http/s transports based on Apache HttpCore for ultrafast execution and support for thousands of connections
Built in Registry/Repository, facilitating dynamic updating and reloading of the configuration and associated resources (e.g. XSLTs, XSD, JS, ..)
Built in support for scheduling tasks using the Quartz scheduler
Load-balancing/Fail-over, and clustered Throttling and Caching support
WS-Security, WS-Reliable Messaging & Throttling configurable via WS-Policies
JMS (v1.x upwards) message support for binary, plain text and XML and SOAP payloads
Enhanced support for Apache VFS transports (s/ftp, file, zip/tar/gz, webdav, cifs..)
Support for message splitting & aggregation using the EIP
Database lookup & store support with DBMediators
Enhanced Mail transport with POP3/SMTP/IMAP protocols
Ability to pin a proxy service or a task to server instances on a cluster
Lightweight, XML and Web services centric messaging model
Configurations serialized into a file system for versioning/backup & restoration with built-in Registry support
Support for Error handling and timeouts, recovery with http/s aintainance mode & gracefull shutdown
JMX monitoring support
Many samples and a built-in Axis2 server to try out and experiment with samples (Samples includes WS-Security, JMS POX/Text messages, Script mediation and many more samples which can be run out of the box)