How to add path parameter in elasticsearch Java bulk Api - elasticsearch

Question

I'm using Java bulk Api,Elasticsearch 6.6.2, and expect to POST bulk request as
POST /<index>/_bulk,
but i got POST /_bulk instead (see packet captured below).
I know these 2 POST methods are the same, but there're a proxy between my app and ES, the path parameter is for the proxy for some reasons(I don't know why).
so, I wonder how to set the path parameter in Java ,so that request can be sent in POST /<index>/_bulk format.
Here's the code
RestHighLevelClient client;
/* some client init code ....*/
...
String INDEX = "api_track";
String DOC_TYPE = "_doc";
BulkProcessor.Builder builder = BulkProcessor.builder(
(request, bulkListener) ->
client.bulkAsync(request, RequestOptions.DEFAULT, bulkListener),
listener);
builder.setBulkActions(500);
builder.setBulkSize(new ByteSizeValue(1L, ByteSizeUnit.MB));
builder.setConcurrentRequests(0);
builder.setFlushInterval(TimeValue.timeValueSeconds(5L));
builder.setBackoffPolicy(BackoffPolicy
.constantBackoff(TimeValue.timeValueSeconds(1L), 3));
builder.setGlobalIndex(INDEX);
builder.setGlobalType(DOC_TYPE);
bulkProcessor = builder.build();
IndexRequest request = new IndexRequest().index(INDEX).type(DOC_TYPE).source(maps);
bulkProcessor.add(request);
and the packet captured:
0x0000: 0200 0000 4500 0277 0000 4000 4006 12c9 ....E..w..#.#...
0x0010: 1e27 dee3 0ba3 1d0b e142 23f0 85d1 ad67 .'.......B#....g
0x0020: 1540 31d3 8018 0801 3eb0 0000 0101 080a .#1.....>.......
0x0030: 1500 c5e6 b6ba 7ff0 504f 5354 202f 5f62 ........POST./_b <-- POST format here
0x0040: 756c 6b3f 7469 6d65 6f75 743d 316d 2048 ulk?timeout=1m.H
0x0050: 5454 502f 312e 310d 0a43 6f6e 7465 6e74 TTP/1.1..Content
0x0060: 2d4c 656e 6774 683a 2033 3335 0d0a 436f -Length:.335..Co
0x0070: 6e74 656e 742d 5479 7065 3a20 6170 706c ntent-Type:.appl
0x0080: 6963 6174 696f 6e2f 6a73 6f6e 0d0a 486f ication/json..Ho
0x0090: 7374 3a20 7365 6172 6368 2e61 6c69 7061 st:.search.alipa
0x00a0: 792e 6e65 743a 3932 3030 0d0a 436f 6e6e y.net:9200..Conn
0x00b0: 6563 7469 6f6e 3a20 4b65 6570 2d41 6c69 ection:.Keep-Ali
0x00c0: 7665 0d0a 5573 6572 2d41 6765 6e74 3a20 ve..User-Agent:.
0x00d0: 4170 6163 6865 2d48 7474 7041 7379 6e63 Apache-HttpAsync
0x00e0: 436c 6965 6e74 2f34 2e31 2e34 2028 4a61 Client/4.1.4.(Ja
0x00f0: 7661 2f31 2e38 2e30 5f31 3531 290d 0a41 va/1.8.0_151)..A
0x0100: 7574 686f 7269 7a61 7469 6f6e 3a20 4261 uthorization:.Ba
0x0110: 7369 6320 6247 6c75 6132 4d36 527a 4e61 sic.bGlua2M6RzNa
0x0120: 5954 4e4e 5755 593d 0d0a 0d0a 7b22 696e YTNNWUY=....{"in
0x0130: 6465 7822 3a7b 225f 696e 6465 7822 3a22 dex":{"_index":"
0x0140: 6170 695f 7472 6163 6b22 2c22 5f74 7970 api_track","_typ
0x0150: 6522 3a22 5f64 6f63 227d 7d0a 7b22 6372 e":"_doc"}}.{"cr
0x0160: 6561 7465 6441 7422 3a22 3230 3230 2d30 eatedAt":"2020-0
0x0170: 322d 3132 5430 383a 3438 3a34 332e 3333 2-12T08:48:43.33
0x0180: 3822 2c22 686f 7374 4164 6472 223a 2231 8","hostAddr":"1
0x0190: 3237 2e30 2e30 2e31 222c 2274 656e 616e 27.0.0.1","tenan
0x01a0: 7449 6422 3a6e 756c 6c2c 2273 6572 7665 tId":null,"serve
0x01b0: 724e 616d 6522 3a6e 756c 6c2c 2270 6172 rName":null,"par
0x01c0: 616d 7322 3a22 2670 7269 7661 7465 5f74 ams":"&private_t
0x01d0: 6f6b 656e 3d2a 2a2a 266f 7264 6572 5f62 oken=***&order_b
0x01e0: 793d 7369 7a65 222c 2275 7365 724e 616d y=size","userNam
0x01f0: 6522 3a22 6d79 7363 6d22 2c22 7573 6572 e":"myscm","user
0x0200: 4964 223a 3330 3034 2c22 7061 7468 6e61 Id":3004,"pathna
0x0210: 6d65 223a 222f 6170 692f 7634 2f70 726f me":"/api/v4/pro
0x0220: 6a65 6374 732f 3339 3235 352f 6c61 6e67 jects/39255/lang
0x0230: 7561 6765 7322 2c22 7265 6d6f 7465 4164 uages","remoteAd
0x0240: 6472 223a 2233 302e 3339 2e32 3232 2e32 dr":"30.39.222.2
0x0250: 3237 222c 2275 7064 6174 6564 4174 223a 27","updatedAt":
0x0260: 2232 3032 302d 3032 2d31 3254 3038 3a34 "2020-02-12T08:4
0x0270: 383a 3433 2e33 3338 227d 0a 8:43.338"}.

Answer 1

It can be done by client.getLowLevelClient().performRequest(new Request(method, endpoint)), fill INDEX into parameter of method.