【ElasticSearch Nest】索引、别名

索引API

获取索引

var settings = new ConnectionSettings(new Uri("http://****:9200/"));
var client = new ElasticClient(settings);
{
    var getIndexResponse = client.Indices.Get("index1");
    if (getIndexResponse.IsValid)
    {
        if (getIndexResponse.Indices.Any())
        {
            IndexState index = getIndexResponse.Indices["index1"];
            int numberOfReplicas = index.Settings.NumberOfReplicas.Value;
            int numberOfShards = index.Settings.NumberOfShards.Value;
            foreach (var property in index.Mappings.Properties)
            {
                var name = property.Value.Name;
                var type = property.Value.Type;
            }
        }
    }
}

创建索引

        var createIndexResponse1 = client.Indices.Create("index111");

        var createIndexResponse2 = client.Indices.Create("index222", c => c
            .Settings(s => s
                .NumberOfShards(1)
                .NumberOfReplicas(1)
                .Setting("index.write.wait_for_active_shards", "2"))
            .Aliases(a => a
                .Alias("alias_1")
                .Alias("alias_2", aa => aa//?
                    .Filter<object>(f => f
                        .Term("user", "kimchy")
                    )
                    .Routing("kimchy")
                ))
            .Map(m => m
                .Properties(p => p
                    .Text(t => t
                        .Name("field1")
                    )
                )
            )
        );

删除索引

var deleteIndexResponse = client.Indices.Delete("index111");

reindex

var reindexOnServerResponse = client.ReindexOnServer(r => r
            .Source(s => s.Index("index1"))
            .Destination(d => d.Index("index333"))
        );

修改setting

var settingsResponse = client.Indices.UpdateSettings("twitter", u => u
    .IndexSettings(i => i
    .NumberOfReplicas(2)
        .RefreshInterval(Time.MinusOne)
        .Analysis(a => a
            .Analyzers(an => an
               .Custom("content", c => c
                   .Tokenizer("whitespace")
               )
           )
        )
    )
);

别名API

查看别名

    {
        //查看全部别名
        var catResponse1 = client.Cat.Aliases();
        if (catResponse1.IsValid)
        {
            catResponse1.Records.Select(r => r.Alias + "->" + r.Index);
        }
        //查看指定通配符的别名
        var catResponse2 = client.Cat.Aliases(c => c.Name("alias_*"));
        //查看指定名称的别名
        var catResponse3 = client.Cat.Aliases(c => c.Name("alias_2"));
    }

批量操作（添加、删除别名）

    {
        var aliasResponse1 = client.Indices.BulkAlias(a => a
            .Remove(al => al
                .Index("index222")
                .Alias("alias_1")
            )
            .Add(a1 => a1
                    .Index("index222")
                    .Alias("alias_111")
            )
            .Add(a1 => a1
                    .Index("index222")
                    .Alias("alias_222")
            )
            .Add(a1 => a1
                    .Index("index*")
                    .Alias("alias_all")
            )

        );

        //多个索引库指定一个别名
        //指向多个索引的别名，用于执行查询不需要做额外的设置，如果需要用于执行索引操作，则需要在被指向的多个索引中指定用于执行索引操作的索引，否则报错误。需要设置个库is_write_index=true
        var aliasResponse2 = client.Indices.BulkAlias(a => a
            .Add(a1 => a1
                    .Index("index*")
                    .Alias("alias_all")
            )
        );
        //删除指定索引库的全部别名
        var aliasResponse3 = client.Indices.BulkAlias(a => a    
            .RemoveIndex(al => al
                .Index("index222")
            )
        );

    }