Apache Synapse – Apache Synapse - The Lightweight ESB

Apache Synapse – Apache Synapse - The Lightweight ESB
Apache Synapse
Last Published: 2023-05-04
Version: 3.0.2
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Apache Synapse Enterprise Service Bus (ESB)
Apache Synapse is a lightweight and high-performance Enterprise Service Bus (ESB).
Powered by a fast and asynchronous mediation engine, Apache Synapse provides
exceptional support for XML, Web Services and REST. In addition to XML and SOAP,
Apache Synapse supports several other content interchange formats, such as plain
text, binary, Hessian and JSON. The wide range of transport adapters available for
Synapse, enables it to communicate over many application and transport layer
protocols. As of now, Apache Synapse supports HTTP/S, Mail (POP3, IMAP, SMTP),
JMS, TCP, UDP, VFS, SMS, XMPP and FIX.
Apache Synapse is free and open source software distributed under the
Apache Software License 2.0
The latest version of Synapse is
v3.0.2
It is a patch release which contains bug fixes and library upgrades to
3.0.0 major feature release.
Apache Synapse, Synapse, Apache, the Apache feather logo, and the Apache Synapse
project logo are trademarks of The
Apache Software
Foundation
Version 3.0.2
The latest version of Synapse is
v3.0.2
It is a patch release that contains bug fixes and enhancements to the features in the 3.0.0 major feature release.
New in Version 3.0.0
High-performing PassThrough HTTP transport support for all mediation scenarios
Ultra-fast, low latency mediation of HTTP requests
Supporting a very large number of inbound (client -> ESB)
and outbound (ESB -> server) connections concurrently
Intelligently handle message content and content awareness
built into the engine with shared buffer for handling data
Automatic throttling and graceful performance
degradation in the presence of slow or faulty clients and
servers
OCSP/CRL certificate validation support for HTTP transports
Respond Mediator - A Mediator for responding back to the client from anywhere in the mediation flow
Loopback Mediator - A Mediator for jumping from IN sequence to OUT sequence
Header Mediator improvements
Support for adding/removing transport headers
New xpath functions
url-encode xpath function
Access system properties from get-property function
base64 decode function
Message Processor improvements
Resequencing Message Processor
New blocking client implementation
Message Injector task improvements
Support for injecting a message to Proxy services
Support for injecting a message to named sequences
Callout Mediator improvements
Support for WS-Security
Inline Endpoint support
Ability to dynamically set the EPR using 'To' header
NTLM support
Script Mediator improvements
Support for removing properties
REST API improvements
Transport level access restriction
Key Features
Proxy services - facilitating transport, interface (WSDL/Schema/Policy),
message format (SOAP 1.1/1.2, POX/REST, Text, Binary), QoS (WS-Addressing/
WS-Security/WS-RM) and optimization switching (MTOM/SwA)
Non-blocking HTTP/S transports for fast HTTP interactions and support for
thousands of concurrent connections
VFS transport for file manipulation and interaction with FTP, SFTP, CIFS
and WEBDAV
JMS support for binary, plain text, XML and SOAP payloads
Mail transport with extensive support for POP3, IMAP and SMTP
Support for industry driven
Financial
Information eXchange (FIX)
protocol
Built-in Registry/Repository, facilitating dynamic reloading of the
configuration and associated resources (e.g. XSLTs, XSD, JS, ..)
Built-in support for scheduling tasks using the
Quartz
scheduler
Load-balancing (with or without sticky sessions) and fail-over routing
Support for many Web Services standards including WS-Addressing, WS-Security
and WS-Reliable Messaging
Policy based message throttling and caching (with special support for clustered
environments)
Message splitting and aggregation
Database lookup and update support with database connection pooling
Fine grained statistics collection over sequences, endpoints and proxy services
JMX monitoring and management
Easily extendable with Java, Spring, or BSF Scripting languages (Javascript,
Ruby, Groovy, etc.)
High Level Architecture
Apache Synapse is designed to be lightweight and fast. The non-blocking HTTP
transport, the multi-threaded mediation engine and the streaming XML infoset combine
to ensure that Synapse can mediate very high volumes of messages through the service
bus with minimum delay and resource usage. Synapse also comes with comprehensive
logging capabilities, statistics collection and JMX monitoring support which are
crucial in production deployments.
Synapse uses Apache Axis2 as the underlying Web Services engine. Therefore it
has outstanding support for Web Services and related standards such as SOAP and
WSDL. Tried and tested Axis2 modules like Apache Rampart and Apache Sandesha2 can be
used with Synapse with no configuration overhead. Using such external modules,
Apache Synapse supports a range of Web Services standards including WS-Security and
WS-Reliable Messaging. Synapse also makes use of the Axis2 clustering framework to
provide enterprise grade clustering support.
Synapse is configured using a simple, XML-based configuration language. The
configuration language and the related functional components are designed with SOA
best practices in mind. It is trivial to store configuration fragments in an external
SOA registry and import them to the mediation engine on demand. Synapse ships with a
large collection of mediators that can be used to implement even the most complex
enterprise integration scenarios. If necessary, the mediation engine can be extended
by developing custom mediators using Java or your favorite scripting language.