How to write Match_all Search Query in Low Level Rest Client API

samyo · July 9, 2019, 10:00am

Hello folks,
i need some help please , to write a correct Search Query to match all things inside my Index in Elasticsearch .

I want also to translate this Query in Java Low Level Rest Client API.

GET try1/_search
{
  "query": {
    "match_all": {}
  }
}

I tried something like this bellow , and it gives me nothing from the Index.
I do now know where to put my Index name to search bellow,

SearchRequestBuilder sr = new SearchRequestBuilder(client, SearchAction.INSTANCE)
                            .setSearchType(SearchType.DFS_QUERY_THEN_FETCH)
                            .setQuery(QueryBuilders.matchAllQuery());

the Code above returns me this ,

{"query":{"match_all":{"boost":1.0}}}

I tried this too , and did not work, bellow ,

SearchRequest searchRequest  = new SearchRequest("try1");
                    SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
                    searchSourceBuilder.query(QueryBuilders.matchAllQuery());
                    searchRequest.source(searchSourceBuilder);

the Result is ,

{searchType=QUERY_THEN_FETCH, indices=[try1], indicesOptions=IndicesOptions[id=38, ignore_unavailable=false, allow_no_indices=true, expand_wildcards_open=true, expand_wildcards_closed=false, allow_aliases_to_multiple_indices=true, forbid_closed_indices=true, ignore_aliases=false], types=[], routing='null', preference='null', requestCache=null, scroll=null, maxConcurrentShardRequests=0, batchedReduceSize=512, preFilterShardSize=128, allowPartialSearchResults=null, source={"query":{"match_all":{"boost":1.0}}}}

Can Anybody please help me to write the Search Query to match_all in the right way using Low Level Client Rest API ???

thx.

dadoonet · July 9, 2019, 9:06pm

Are you sure you want to use the low level client and not the high level one?

samyo · July 10, 2019, 6:58am

yes i want to give the Low Level Client a try , i use actually the TransportClient , to Creat Index and send Data to Elasticsearch , is there any Option , to use my TransportClient in order to write the Match_all Search Query in a right Way???
I am not using the RestClient , is there any different between both????

I Used the High Level Client too like this bellow , and still even did not give me the Content of the Index ,

try (RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(HttpHost.create("http://localhost:9200")))) {
            SearchRequest searchRequest = new SearchRequest("try1");
            SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
            searchSourceBuilder.query(QueryBuilders.matchAllQuery());
            searchRequest.source(searchSourceBuilder);
            System.out.println("searchrequest is : " + searchRequest);
}

The Result of this High Level Client Query is ,

{searchType=QUERY_THEN_FETCH, indices=[try1], indicesOptions=IndicesOptions[id=38, ignore_unavailable=false, allow_no_indices=true, expand_wildcards_open=true, expand_wildcards_closed=false, allow_aliases_to_multiple_indices=true, forbid_closed_indices=true, ignore_aliases=false], types=[], routing='null', preference='null', requestCache=null, scroll=null, maxConcurrentShardRequests=0, batchedReduceSize=512, preFilterShardSize=128, allowPartialSearchResults=null, source={"query":{"match_all":{"boost":1.0}}}}

Nothing seems to work correctly . Cause i need the Content of the Index under "_source".

Any Suggestion i will be thankfull.

samyo · July 10, 2019, 9:06am

I tried again with the RestClient API insead of TransportClient like bellow,

     RestClient restClient = RestClient.builder(
                            new HttpHost("localhost", 9200, "http")).build();
                    RestClientBuilder builder = RestClient.builder(new HttpHost("localhost", 9200, "http"));
                    Response response1 = restClient.performRequest("GET","try1");//here the IndexName
                    RequestLine requestLine = response1.getRequestLine();
                    HttpHost host = response1.getHost();
                    int statusCode = response1.getStatusLine().getStatusCode();
                    //org.apache.http.Header[] headers = response1.getHeaders();
                    String responseBody = EntityUtils.toString( response1.getEntity());
                    System.out.println("result is : " + responseBody);

The Result seems to be better, cause it returns the Typs of all Fields of my Index , like bellow ,

{"try1":{"aliases":{},"mappings":{"_doc":{"properties":{"my_id":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}},"field":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}},"gender":{"type":"text","fields":{"keyword":{"type":"keyword","ignore_above":256}}}}}},"settings":{"index":{"creation_date":"1561710794108","number_of_shards":"5","number_of_replicas":"1","uuid":"IWI-z1wPRXiUt3N3RINEYw","version":{"created":"6030199"},"provided_name":"try1"}}}}

I just need the Values inseatd of the Typs of Fields . Is there any Option to do that ??

thx

samyo · July 10, 2019, 9:41am

So i have resolved it like bellow , but still have a littel Question.

     RestClient restClient = RestClient.builder(
                            new HttpHost("localhost", 9200, "http")).build();
                    //RestClientBuilder builder = RestClient.builder(new HttpHost("localhost", 9200, "http"));
                   // Map<String, String> params = Collections.singletonMap("gender", "Ahoiii");

           Response response1 = restClient.performRequest("GET","/try1/_doc/1"); // here is the secret
                    RequestLine requestLine = response1.getRequestLine();
                    HttpHost host = response1.getHost();
                    int statusCode = response1.getStatusLine().getStatusCode();
                    //org.apache.http.Header[] headers = response1.getHeaders();
                    String responseBody = EntityUtils.toString( response1.getEntity());
                    System.out.println("result is : " + responseBody);

result is,

result is : {"_index":"try1","_type":"_doc","_id":"1","_version":4,"found":true,"_source":{"my_id":"6","gender":"Ahoiii"}}

I need to write this

Response response1 = restClient.performRequest("GET","/try1/_doc/1");

correctly to give me all Entity with their different "_id's" , not just the "_doc" with "_id =1 ".
Cause in my Index there are more than one _id .
Can you please help me do this??

thx.

dadoonet · July 10, 2019, 10:33am

Could you express what you want to do with a full recreation script as described in About the Elasticsearch category. It will help to better understand what you are doing. Please, try to keep the example as simple as possible.

A full reproduction script will help readers to understand, reproduce and if needed fix your problem. It will also most likely help to get a faster answer.

Then when we know exactly what you want to do, we can translate that to Java code.

samyo · July 10, 2019, 11:11am

I just want to translet the Match_all Search Query using either TransportClient in Low Level Rest Client, or RestClient in Low Level Rest Client.
I want just the same Result wich this Query gives , but on my Programm Console using one of the above Low Level Clients.
This Search query will give me all Content of my Index , that mean every Entity and every Field with its Value too .

GET try1/_search
{
  "query": {
    "match_all": {}
  }
}

That is all the Idea about.
thx.

dadoonet · July 10, 2019, 12:52pm

Easiest way:

try (RestHighLevelClient client = new RestHighLevelClient(
        RestClient.builder(HttpHost.create("http://localhost:9200")))) {
    SearchResponse response = client.search(new SearchRequest("test"), RequestOptions.DEFAULT);
} catch (Exception e) {
    e.printStackTrace(System.err);
}

Or:

try (RestHighLevelClient client = new RestHighLevelClient(
        RestClient.builder(HttpHost.create("http://localhost:9200")))) {
    SearchResponse response = client.search(new SearchRequest("test")
            .source(new SearchSourceBuilder().query(
                    QueryBuilders.matchAllQuery()
                    )
            ), RequestOptions.DEFAULT);
} catch (Exception e) {
    e.printStackTrace(System.err);
}

samyo · July 10, 2019, 1:29pm

i tried both , they did not work , and throw me this Failure,

faild Elasticsearch exception [type=illegal_argument_exception, reason=request [/test/_search] contains unrecognized parameters: [ccs_minimize_roundtrips], [ignore_throttled]]

what is the Reason of that ?
thx

dadoonet · July 10, 2019, 1:55pm

Because you are not using the same version for the client and the server most likely.

system · August 7, 2019, 1:55pm

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How to write Match_all Search Query in Low Level Rest Client API

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