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Bleve for Go

1. Introduction

Bleve is an open-source full-text search library for Go. It provides a simple API for indexing and searching text, making it ideal for applications that require search functionality without the complexity of a full search engine.

2. Key Concepts

  • **Index**: A structure that stores documents and allows for efficient searching.
  • **Document**: The data that will be indexed and searched, typically in JSON format.
  • **Query**: The request made to the index to retrieve documents that match certain criteria.

3. Installation

To install Bleve, you need to have Go installed on your machine. Run the following command:

go get github.com/blevesearch/bleve/v2

4. Basic Usage

Step-by-Step Guide

  1. Create an index.
  2. Index documents.
  3. Perform search queries.

Here is a simple example:


package main

import (
    "fmt"
    "github.com/blevesearch/bleve/v2"
)

func main() {
    // Create an index
    index, err := bleve.New("example.bleve", bleve.NewIndexMapping())
    if err != nil {
        fmt.Println("Error creating index:", err)
        return
    }

    // Index a document
    doc := struct {
        Name string
        Age  int
    }{"Alice", 30}
    index.Index("doc1", doc)

    // Search for documents
    query := bleve.NewMatchQuery("Alice")
    search := bleve.NewSearchRequest(query)
    result, err := index.Search(search)
    if err != nil {
        fmt.Println("Error searching:", err)
        return
    }
    fmt.Println("Search result:", result)
}
                

5. Best Practices

Consider the following best practices when using Bleve:

  • Index data in a structured format (e.g., JSON).
  • Regularly update your indexes to reflect changes in your data.
  • Utilize proper query structures to ensure efficient searches.

6. FAQ

What is Bleve?

Bleve is a full-text search and indexing library for Go.

Can Bleve be used in production?

Yes, Bleve is designed for production use, but performance should be tested according to your specific use case.

How does Bleve compare to other search engines?

Bleve is lightweight and easy to integrate into Go applications, unlike larger systems like Elasticsearch.