Data Intensive Java Serving Container

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Vespa's Java container is optimized for a quick and easy dev-to-prod cycle, and for writing code which processes large amount of incoming and outgoing data. It is fully integrated with the Cloud Config System, allowing for live reconfiguration without service interruption. The container exposes a servlet-like API for query processing that allows building RESTful web-services, and a storm-like API to do document processing. It exposes APIs for simple and performant federation across heterogeneous data sources. Read the container overview - read more. Sample applications:

• Implement "Hello, World!" using the application development tutorial
• Building an HTTP API using request handlers and processors.
• Building an HTTP API using searchers

Develop Components

• The Container provides a framework for processing requests and responses, named Processing - its building blocks are:
  • Chains of other components that are to be executed serially, with each providing some service or transform
  • Processors that change the request and / or the response. They may also make multiple forward requests, in series or parallel, or manufacture the response content themselves
  • Renderers that are used to serialize a Processor's response before returning it to a client
• Application Lifecycle and unit testing:
  • Configuring components with custom configuration
  • Component injection allows components to access other application components
  • Learn how to build OSGi bundles and how to troubleshoot classloading issues
  • XML processing with JAXB and JAXP (DOM, SAX, StAX)
  • Using Libraries for Pluggable Frameworks from a component may result in class loading issues that require extra setup in the application
  • Unit testing configurable components
• Handlers and filters:
  • Http servers and security filters for incoming connections on HTTP and HTTPS
  • Request handlers to process incoming requests and generate responses
• Searchers and Document Processors:
  • Searcher and search result renderer development
  • Document processing, development

Reference

• services.xml
• Metrics

Appendices

• Versioning Components
• Client providers are capable of connecting to and forwarding requests to a remote server on a specific protocol, e.g. the HttpClient is a client provider for HTTP and HTTPS
• To accept incoming connection on other protocols than HTTP/HTTPS, develop custom server providers starting with the tutorial
• The Chain Builder API
• Designing RESTful web services as Vespa Components
• Using the Container with a VIP
• Vespa Component types