Web services have gained traction thanks to their ability to interoperate with heterogeneous systems. When Web services were introduced, performance or memory were minor concerns.
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Several companies identified the potential in this emerging technology and entered the field, seeking to have better and faster SOAP engines. By that time, a Web services definition was standardized through WSDL (Web Services Description Language), and Web services discovery was standardized through UDDI (Universal Description, Discovery and Integration). Apache Axis was born and became dominant during this era.
Now that the initial stages of Web services are coming to an end, Web services are in high demand, and a large number of players have entered the Web services arena. Aspects governing different facets of Web services interactions have been standardized. The third generation of Web services requires faster, far more robust SOAP engines.
Apache Axis2 is an effort to incorporate the latest changes in the Web services space and to improve performance and efficiency. During a face-to-face meeting in Colombo, Sri Lanka, in August 2003, some of the leading architects of Apache Axis 1.x got together and initiated Apache Axis2, the next generation of Apache Web services. A new architecture was introduced to fulfill the current demand, taking the best patterns and usage scenarios from Axis 1.x. Key improvements and new features included:
* A new XML processing model
* A messaging-based extensible core
* An improved deployment model
* Pluggable data binding support
* Asynchronous and synchronous Web services invocation
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