Unable to create an index with nested json using Jest elastic client - elasticsearch

Question

I am using java and Jest (https://github.com/searchbox-io/Jest) as a client for elastic search cluster.
Trying to create and index with the below structure in http://localhost:9200/myindex/mytype
{
"doc": {
"_content": "mycontent",
"_name": "mypdf.pdf",
"_content_type": "application/pdf"
}
}
And below is my java code,
XContentBuilder docObject = jsonBuilder().startObject().field("_content", doc).field("_name", name).field("_content_type", contentType)
.field("title", title).field("author", author).endObject();
index1 = new Index.Builder(docObject).build();
source = jsonBuilder()
.startObject()
.field("doc", docObject.string())
.endObject().string();
Index index = new Index.Builder(source).index(baseIndexName).type(ElasticConstants.BASE_TYPE).build();
But when this gets executed , the source is not passed as a Json and value for the key "doc" is passed as a string literal because of which the index is not getting created . How do I pass nested json objects to the Index.Builder using Jest ?

Answer 1

//Instantiate JEST Client
JestClientFactory factory = new JestClientFactory();
HttpClientConfig config = new HttpClientConfig.
Builder("http://localhost:9201")
.multiThreaded(true).build();
factory.setHttpClientConfig(config);
JestClient jestClient = factory.getObject();
//create index
jestClient.execute(new CreateIndex.Builder("so4index").build());
//create index mapping
RootObjectMapper.Builder rootObjMapBuilder1 = new RootObjectMapper.Builder("so1type");
RootObjectMapper.Builder rootObjMapBuilder = new RootObjectMapper.Builder("doc");
rootObjMapBuilder.add(new StringFieldMapper.Builder("_content").store(true));
rootObjMapBuilder.add(new StringFieldMapper.Builder("_name").store(true));
rootObjMapBuilder.add(new StringFieldMapper.Builder("_content_type").store(true));
rootObjMapBuilder1.add(rootObjMapBuilder);
DocumentMapper docMapper = new DocumentMapper.Builder("so4index", null, rootObjMapBuilder1).build(null);
String source = docMapper.mappingSource().toString();
PutMapping putMapping = new PutMapping.Builder("so4index", "so1type", source).build();
JestResult mappingResult = jestClient.execute(putMapping);
//Insert Document Content
String doc="mycontent";
String name="mypdf.pdf";
String contentType = "application/pdf";
XContentBuilder docObject = jsonBuilder()
.startObject()
.startObject("doc").field("_content", doc)
.field("_name", name)
.field("_content_type", contentType)
.endObject()
.endObject();
Index index = new Index.Builder(docObject.string()).index("so4index").type("so1type").build();
JestResult jestResult= jestClient.execute(index);
jestClient.shutdownClient();