The solution is presented using the Atomikos JTA libraries that allows the execution of the sample without deploying the UltraESB on a JEE application server such as JBoss. The original post requested for a sample using WebSphere MQ, and Oracle as the database, on top of JBoss.
The sample we've implemented uses an "embedded" ActiveMQ JMS server - started with just a couple of lines of Spring configuration within the UltraESB. The complete mediation is just a few lines of extremely powerful code - using the robust Spring framework JDBCTemplates. This coupled with the use of Java allows one to write powerful integration scripts, with the full power of the Java programming language or any other JSR 223 scripting language such as Ruby, Groovy, Javascript etc., without learning vendor or product specific configuration languages based on XML.
The sample shows the happy day scenarios as well as rollback of transactions, using the SOA ToolBox to fire sample JMS messages for testing.
For over two weeks, a user on the Mule mailing list has been looking for a way to download Email messages over POP3/IMAP and save attachments into the file system. However, as of today, the last post indicates a blocker issue MULE-5138 which needs a solution before IMAP maybe used..
I've written an article that describes how an UltraESB Proxy Service for a SOAP service could be deployed on the Free and Open Source UltraESB, to respond back to the client immediately once the response becomes available, but then post a copy of the response via an asynchronous email - without affecting the performance of the main message flow.
This was a request for an initial proof-of-concept for a large Telecom company in the US, and shows how an embedded ActiveMQ JMS server could be started within the UltraESB using the native support for the Spring Framework
A few minutes ago, Asanka Abeysinghe the Director of Solutions Architecture of WSO2 claimed that the WSO2 ESB supports "Zero Copy", at the WSO2Con held in Colombo, 14th September 2010
However, this statement is false, and can be easily proved by just looking at the implementation source code of the BinaryRelayBuilder, which copies the complete input stream into a byte[] in Heap memory via traditional CPU copying into user space.
In-fact, when WSO2 announced this "Binary Relay" in December 2009, even the author of this "feature" did not state that its anything near "Zero Copy". Even a search on Google for WSO2 and Zero copy returns no results!
"Zero-copy" describes computer operations in which the CPU does not perform the task of copying data from one memory area to another." - Wikipedia
The AdroitLogic UltraESB is the FIRSTand still the ONLY Open Source ESB (or most possibly "the only ESB") that supports True Zero-Copy proxying.
UltraESB is the first Open Source Enterprise Service Bus (ESB) to utilize Zero-copy proxying with Memory Mapped files and Java Non-Blocking IO for extreme performance.
AdroitLogic Private Ltd. announced today that it is open sourcing the code of its Enterprise Service Bus the UltraESB, under the GNU Affero General Public License. The UltraESB first announced in January, becomes the first Open Source ESB to claim support for Zero-copy proxying of requests with Java Non-blocking IO and Memory Mapped files to support extreme levels of performance. AdroitLogic also released the code of a Web Services Security library 'SoapBox', that was custom built by them for use by the UltraESB, which performs about 4 times faster than solutions based on the Apache WSS4J/Rampart frameworks. This support combined with SSL, HTTP Basic/Digest and other authentication methods makes the UltraESB an ideal platform to implement a Security Gateway for hosted services.
The UltraESB supports legacy transports such as JMS, File, S/FTP, FTPS, Email(POP3/IMAP/SMTP), Database, B2B AS2 (Applicability Statement 2), MLLP/S and TCP/S in addition to HTTP/S, and handles messages in their native formats without any conversions into an intermediate format. It supports REST, EDI, SOAP 1.1/1.2, POX/XML, Hessian, JSON, Health Level 7 (HL7), Binary, Text, CSV, HTML and many other message formats. The UltraESB supports JTA XA transactions, including asynchronous suspend and resume, and can be deployed standalone or within a JEE Servlet container such as Tomcat.
"The UltraESB is a complete new ESB written from scratch. Thus we were able to improve the performance and ease of use phenomenally by using techniques such as Java 6 support for compilation, NIO and Zero-copy proxying with Memory Mapped files. We base the core engine on a very few and stable libraries, and are extremely careful about good design and coding practices” said Asankha Perera the founder of AdroitLogic. Asankha earlier contributed most of the code of the Apache Synapse ESB which formed a basis for other open source ESBs as well as Security Appliances.
The UltraESB includes a Performance Benchmarking Framework to compare its performance against other ESBs on identical conditions. More information about this framework can be found at the ESB Performance website.
The UltraESB is configured with one or more XML files that allows mediation code to be written as fragments of Java, or JSR 223 Scripting languages - such as Javascript, Groovy, Ruby etc. Mediation logic can also be written as Java classes or POJOs, without depending on any specific interfaces. This ensures that the users do not have to learn yet another programming or XML configuration language; or compile-bundle-and-deploy artifacts for configuration changes to take effect.
"The UltraESB is very easy to use. The learning curve is minimal since it's based on Java and Scripting languages. The support is great, and the performance, exceptional!" said Shalinda Ranasinghe, Chief Software Architect of ShipXPress Inc. The configuration could be performed within an IDE of the users' choice that supports intelligent context aware auto completion, and step-through debugging. The UltraESB supports JMX management and reporting with standard JMX consoles, and is about 30MB to download inclusive of many samples.
Availability and Support
The UltraESB is available for download under the GNU Affero General Public License (AGPL); and under a Free Commercial License allowing unlimited and perpetual use. Custom paid licensing options are available for users who wish to embed the UltraESB into proprietary applications. AdroitLogic offers world-wide production support, consultancy, training, development support and custom development for the UltraESB.
I've written a simple example that shows how a Gmail account could be polled by the UltraESB and then forward them to a Web service. The example invokes the SimpleStockQuoteService hosted via the test ToolBox.
The UltraESB makes it easy to strip all unwanted email headers, and then send the request as a SOAP request by updating the content type to text/xml. The response is then sent back to the original client using Gmail SMTP
Read the full example and download the sample configuration files from here
Secure your backend services using Basic Authentication or Digest Authentication over HTTP or HTTPS with a Proxy service deployed on the UltraESB. The credentials are verified using any Spring Security based authentication providers - including in-memory, Database, LDAP etc. The article presents the ready-to-run Sample #110 of the UltraESB that demonstrates many scenarios to secure, and to invoke secured services! The highlight of the article is a proxy service that could be used to authenticate into Amazon S3 using its REST API. A follow up article will soon demonstrate how a fixed-length COBOL file is polled from a directory or sftp, ftp/s, converted into XML and uploaded into a S3 location.. keep tuned!
