Lucene Overview - Lucene

What is Lucerne Overview?

Lucerne is an easy however powerful Java-based Search records. It can be use in any application to insert search capability to it. Lucerne is an open-source scheme. It is scalable. This high-performance library is used to file and search practically any kind of text. Lucerne library provide the core operations which are necessary by any search application. Indexing and search.

How Search Application works?

A Search application perform all or a small number of of the following operations −

Step Title Description
Acquire Raw Content
The first step of any search application is to collect the target contents on which search application is to be conducted.
Build the document
The next step is to build the document(s) from the raw content, which the search application can understand and interpret easily.
Analyze the document
Before the indexing process starts, the document is to be analyzed as to which part of the text is a candidate to be indexed. This process is where the document is analyzed.
Indexing the document
Once documents are built and analyzed, the next step is to index them so that this document can be retrieved based on certain keys instead of the entire content of the document. Indexing process is similar to indexes in the end of a book where common words are shown with their page numbers so that these words can be tracked quickly instead of searching the complete book.
User Interface for Search
Once a database of indexes is ready then the application can make any search. To facilitate a user to make a search, the application must provide a usera meanora user interfacewhere a user can enter text and start the search process.
Build Query
Once a user makes a request to search a text, the application should prepare a Query object using that text which can be used to inquire index database to get the relevant details.
Search Query
Using a query object, the index database is then checked to get the relevant details and the content documents.
Render Results
Once the result is received, the application should decide on how to show the results to the user using User Interface. How much information is to be shown at first look and so on.

Separately from these essential operations, a search application can also offer administration user interface and help administrator of the application to manage the level of search based on the customer profiles. Analytics of search grades is another main and advanced feature of any search application.

Lucerne’s Role in Search Application

Lucerne plays role in steps 2 to step 7 mentions above and provides classes to do the essential operations. In a nutshell, Lucerne is the heart of any search application and provides vital operations pertaining to indexing and searching. Acquiring filling and display the results is left for the application part to handle.

In the next stage, we will present an easy Search application using Lucene Search library.

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