/**
* A custom serializer would not know how to serialize `QueryContainer` or other NEST types that could appear as part of
* the `_source` of a document, therefore a custom serializer needs to have a way to delegate serialization of NEST types
* back to NEST's built-in serializer.
*/
/**
* ==== JsonNetSerializer
*
* We ship a separate {nuget}/NEST.JsonNetSerializer[NEST.JsonNetSerializer] package that helps in composing a custom `SourceSerializer`
* using `Json.NET`, that is smart enough to delegate the serialization of known NEST types back to the built-in
* `RequestResponseSerializer`. This package is also useful if
*
* . You want to control how your documents and values are stored and retrieved from Elasticsearch using `Json.NET`
* . You want to use `Newtonsoft.Json.Linq` types such as `JObject` within your documents
*
* The easiest way to hook this custom source serializer up is as follows
*/
public void DefaultJsonNetSerializer()
{
var pool = new SingleNodePool(new Uri("http://localhost:9200"));
var connectionSettings =
new ElasticsearchClientSettings(pool, sourceSerializer: JsonNetSerializer.Default);
var client = new ElasticsearchClient(connectionSettings);
}
/**
* Hooking up the serializer is performed in the `ConnectionSettings` constructor
*/
public void TheNewContract()
{
var pool = new SingleNodePool(new Uri("http://localhost:9200"));
var connectionSettings = new ElasticsearchClientSettings(
pool,
sourceSerializer: (builtin, settings) => new VanillaSerializer()); // <1> what the Func?
var client = new ElasticsearchClient(connectionSettings);
}
public void CanDeserialize()
{
var json = @"{
""took"": 61,
""errors"": false,
""items"": [{
""update"": {
""_index"": ""test"",
""_type"": ""_doc"",
""_id"": ""1"",
""_version"": 2,
""result"": ""updated"",
""_shards"": {
""total"": 2,
""successful"": 1,
""failed"": 0
},
""_seq_no"": 3,
""_primary_term"": 1,
""get"": {
""_seq_no"": 3,
""_primary_term"": 1,
""found"": true,
""_source"": {
""field1"": ""value1"",
""field2"": ""value2""
}
},
""status"": 200
}
}]
}" ;
var pool = new SingleNodePool(new Uri("http://localhost:9200"));
var connection = new InMemoryConnection(Encoding.UTF8.GetBytes(json));
var settings = new ElasticsearchClientSettings(pool, connection);
var client = new ElasticsearchClient(settings);
var bulkResponse = client.Bulk(new BulkRequest());
bulkResponse.ShouldBeValid();
var item1 = bulkResponse.Items[0].Get;
item1.SeqNo.Should().Be(3);
item1.PrimaryTerm.Should().Be(1);
item1.Found.Should().Be(true);
var simpleObject = bulkResponse.Items[0].Get.Source.As <SimpleObject>();
simpleObject.Field1.Should().Be("value1");
simpleObject.Field2.Should().Be("value2");
}
/**
* `JsonNetSerializer`'s constructor takes several methods that allow you to control the `JsonSerializerSettings` and modify
* the contract resolver from `Json.NET`.
*/
public void DefaultJsonNetSerializerFactoryMethods()
{
var pool = new SingleNodePool(new Uri("http://localhost:9200"));
var connectionSettings =
new ElasticsearchClientSettings(pool, sourceSerializer: (builtin, settings) => new JsonNetSerializer(
builtin, settings,
() => new JsonSerializerSettings {
NullValueHandling = NullValueHandling.Include
},
resolver => resolver.NamingStrategy = new SnakeCaseNamingStrategy()
));
var client = new ElasticsearchClient(connectionSettings);
}
public static ElasticsearchClientSettings CreateConnectionSettings(
object response,
int statusCode = 200,
Func <ElasticsearchClientSettings, ElasticsearchClientSettings> modifySettings = null,
string contentType = RequestData.MimeType,
Exception exception = null,
Serializer serializer = null
)
{
serializer ??= TestClient.Default.RequestResponseSerializer;
byte[] responseBytes;
switch (response)
{
case string s:
responseBytes = Encoding.UTF8.GetBytes(s);
break;
case byte[] b:
responseBytes = b;
break;
default:
{
responseBytes = contentType == RequestData.MimeType
? serializer.SerializeToBytes(response,
TestClient.Default.ElasticsearchClientSettings.MemoryStreamFactory)
: Encoding.UTF8.GetBytes(response.ToString());
break;
}
}
var headers = new Dictionary <string, IEnumerable <string> > {
{ "x-elastic-product", new[] { "Elasticsearch" } }
};
var connection = new InMemoryConnection(responseBytes, statusCode, exception, contentType, headers);
var nodePool = new SingleNodePool(new Uri("http://localhost:9200"));
var defaultSettings = new ElasticsearchClientSettings(nodePool, connection)
.DefaultIndex("default-index");
var settings = modifySettings != null?modifySettings(defaultSettings) : defaultSettings;
return(settings);
}
/**
* Hooking up the serializer and using it is as follows
*/
[U] public void UsingJsonNetSerializer()
{
var pool = new SingleNodePool(new Uri("http://localhost:9200"));
var connectionSettings = new ElasticsearchClientSettings(
pool,
connection: new InMemoryConnection(), // <1> an _in-memory_ connection is used here for example purposes. In your production application, you would use an `ITransportClient` implementation that actually sends a request.
sourceSerializer: (builtin, settings) => new MyFirstCustomJsonNetSerializer(builtin, settings))
.DefaultIndex("my-index");
//hide
connectionSettings.DisableDirectStreaming();
var client = new ElasticsearchClient(connectionSettings);
/** Now, if we index an instance of our document type */
var document = new MyDocument
{
Id = 1,
Name = "My first document",
OwnerId = 2
};
var indexResponse = client.Index(document, d => { });
/** it serializes to */
//json
var expected = new
{
id = 1,
name = "My first document",
file_path = (string)null,
owner_id = 2,
sub_documents = (object)null
};
/**
* which adheres to the conventions of our configured `MyCustomJsonNetSerializer` serializer.
*/
// hide
Expect(expected, preserveNullInExpected: true).FromRequest(indexResponse);
}