![]() Recompilation alone will most likely not be sufficient. Software components directly accessing or extending the library. That if you are upgrading from a previous Lucene release, you should at least recompile any To be successful at a minimum, it is not likely to be flawless. A drop-in library replacement is not guaranteed Lucene 2.9 introduces several back-compatibility-breaking changes that may well requireĬhanges in your code that uses the library. ![]() Software components accessing or extending Apache Lucene. Those past cases, Lucene-based apps could be upgraded flawlessly without recompiling the Upgrading to a new Lucene version just by replacing the JAR file in their classpath. Performance improvements and bug fixes, programmers have been accustomed to Some important notes on compatibility: because previous minor releases also contained Various contributions have markedly improved support for languages like Arabic,.Near-mandatory functionality for state-of-the-art search. Local-Lucene and its geo-search capabilities, now donated to Apache, provide this.Programmers to more easily create their own query parsing syntax. An extremely flexible query parser framework opens new possibilities for.Lucene Contrib also adds new utility packages, introduced with this release: Analysis API has been replaced for more streamlined, flexible text handling.ġ See the Appendix for a discussion of when to choose Lucene or Solr.Īnd, behind the scenes, the groundwork has been laid for yet more indexing flexibility in.A new, straightforward API for handling Numeric Ranges both simplifiesĭevelopment and virtually wipes out performance overhead.Improvements for Near-Realtime Search capabilities make documents searchable.In several key aspects, which make it an even more compelling alternative to other It introduces multiple performance improvements, new features, better runtimeīehavior, API changes, and bug-fixes at a variety of levels. Unlike the previous 2.4.1 release (March 2009), Lucene 2.9 is more than just a bug-fix Overview of the innovations in this release. If you do not have a Lucene application, the paper should also give you a good You may take advantage of the various improvements and prepare for the next major This white paper aims to address key issues for you if you have an Apache Lucene-basedĪpplication, and need to upgrade existing code to work well with this latest version, so that Release of version 2.9 in September 2009, the Apache Lucene community delivered the Lucene and Solr offer an attractiveĪlternative to proprietary licensed search and discovery software vendors.1 With the Solr is the fastest-growing Lucene subproject. Downloads of Lucene,Īnd its server implementation Solr, have grown nearly tenfold over the past three years Top 5 Apache projects, with installations at over 4,000 companies. Lucene currently ranks among the top 15 open source projects and is one of the ![]() Library, in open source, suitable for nearly every application that requires full-text searchįeatures. Minor Changes and Improvements in Lucene 2.9. ![]() Lucene Spatial (formerly known as LocalLucene). Numeric Capabilities and Numeric Range Queries. The same goal: improving Lucene’s state-of-the-art search capabilities.Ī Lucid Imagination Technical White Paper Many newįeatures have been added, new APIs introduced, and critical bugs have been fixed-all with Search, flexible indexing, and high-performance numerical range queries. Points have been improved to open the way for innovative new features like near-real-time In the simplest terms, Lucene is now faster and more flexible than before. Lucene’s capabilities, though those new to Lucene should also find it a useful exploration of It is intended mainly for programmers familiar with the broad base of This white paper describes the new features and improvements in the latest version,Īpache Lucene 2.9. Innovations they have engineered have delivered significant ongoing advances in Lucene’s The experienceĪccumulated over time by the community of Lucene committers and contributors and the Since its introduction nearly 10 years ago, Apache Lucene has become a competitive playerįor developing extensible, high-performance full-text search solutions. Library in open source, suitable for nearly every application that requires full-text search Apache Lucene is a high-performance, cross-platform, full-featured Information Retrieval
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