Host Builder Extensions

How To Integrate Elasticsearch In ASP.NET Core

public static class ElasticSearchExtension {
    public static void AddElasticSearch(this IServiceCollection services, IConfiguration configuration) {
        var baseUrl = configuration["ElasticSettings:baseUrl"];
        var index = configuration["ElasticSettings:defaultIndex"];
        var settings = new ConnectionSettings(new Uri(baseUrl ?? "")).PrettyJson().CertificateFingerprint("6b6a8c2ad2bc7b291a7363f7bb96a120b8de326914980c868c1c0bc6b3dc41fd").BasicAuthentication("elastic", "JbNb_unwrJy3W0OaZ07n").DefaultIndex(index);
        settings.EnableApiVersioningHeader();
        AddDefaultMappings(settings);
        var client = new ElasticClient(settings);
        services.AddSingleton < IElasticClient > (client);
        CreateIndex(client, index);
    }
    private static void AddDefaultMappings(ConnectionSettings settings) {
        settings.DefaultMappingFor < ArticleModel > (m => m.Ignore(p => p.Link).Ignore(p => p.AuthorLink));
    }
    private static void CreateIndex(IElasticClient client, string indexName) {
        var createIndexResponse = client.Indices.Create(indexName, index => index.Map < ArticleModel > (x => x.AutoMap()));
    }
}

Few things of note off the top of my head about this. It’s a class extension so denoted by static class and public static void method. Also the parameters contain this as the first param so that we no this is an extension for Service Collection. You’ll notice that you have a reference to services collection and you add the IElasticClient as a Singleton.

To use this:

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddElasticSearch(builder.Configuration);