Support of Elasticsearch for Java

 public test() throws UnknownHostException {
        Settings setting = Settings.builder()
                .put("cluster.name", "cluster1")
                .put("client.transport.sniff", true).build();
        this.client = new PreBuiltTransportClient(setting)
                .addTransportAddresses(new InetSocketTransportAddress(InetAddress.getByName(host), 9300),new InetSocketTransportAddress(InetAddress.getByName(host), 9301));
 }

public class restClientConnection {

    private HttpHost httpHost;
    private RestClient restClient;
    private static HttpHost httpHost2 = new HttpHost("localhost",9303,"http");
    
    public restClientConnection(String host, int port, String protocol) {
        
        this.httpHost = new HttpHost(host, port, protocol);
    }
    
    public RestClient connect() {
        
        this.restClient = RestClient.builder(this.httpHost,httpHost2).build();
        return this.restClient;
        
    }
}

 public String insertid(@PathVariable final String id) throws IOException {

        IndexResponse response = this.client.prepareIndex("person", "id", id)
                .setSource(jsonBuilder()
                        .startObject()
                        .field("fname", "shakeel")
                        .field("fplace", "bangalore" )
                        .field("fteamName", "R&D")
                        .endObject()
                )
                
                .get();
        return response.getResult().toString();
    }

public String insertpid(@PathVariable final String id) throws IOException {

        IndexResponse response = this.client.prepareIndex()
                .setIndex("person")
                .setType("id")
                .setId(id)
                .setSource(jsonBuilder()
                        .startObject()
                        .field("fullname", "shakeel")
                        .field("age", "31" )
                        .field("qualification", "graduate")
                        .endObject()
                )
                
                .get();
        return response.getResult().toString();
    }

 public String update1(@PathVariable final String id) throws IOException {

        UpdateRequest updateRequest = new UpdateRequest();
        updateRequest.index("employee")
                .type("id")
                .id(id)
                .doc(jsonBuilder()
                        .startObject()
                        .field("gender", "male")
                        .endObject());
        try {
            UpdateResponse updateResponse = this.client.update(updateRequest).get();
            System.out.println(updateResponse.status());
            return updateResponse.status().toString();
        } catch (InterruptedException | ExecutionException e) {
            System.out.println(e);
        }
        return "Exception";
    }

public String execute() throws IOException {
        UpdateRequest updateRequest = new UpdateRequest();
        updateRequest.index("person")
                .type("id")
                .id("123")
                .doc(jsonBuilder()
                        .startObject()
                        .field("gender", "male")
                        .endObject());
        UpdateResponse gResponse = client.execute(UpdateAction.INSTANCE,updateRequest).actionGet();
        System.out.println(gResponse.toString());
        return gResponse.toString();
    }

public String explain1() throws IOException {
        ExplainRequest explainRequest = new ExplainRequest("person","id","123");
        QueryBuilder queryBuilder = QueryBuilders.matchQuery("lastname","khan");
        explainRequest = explainRequest.query(queryBuilder);
        ExplainResponse eResponse = client.explain(explainRequest).actionGet();
        System.out.println(eResponse.getExplanation().getDescription());
        return eResponse.getExplanation().getDescription();
    }

public String fieldcap() throws IOException {
        FieldCapabilitiesRequest fRequest = new FieldCapabilitiesRequest();
        fRequest.fields("name").indices("employee","person");
        FieldCapabilitiesResponse fResponse = client.fieldCaps(fRequest).actionGet();
        System.out.println(fResponse.get().toString());
        return fResponse.get().toString();
    }

 public String delete1(@PathVariable final String id) {

        DeleteResponse deleteResponse = client.prepareDelete("employee", "id", id).get();

        System.out.println(deleteResponse.getResult().toString());
        return deleteResponse.getResult().toString();
    }

public static void main(String[] args) throws IOException {
        // Demo the JestClient
        JestClient jestClient = jestClient();
        // Index a document from String
        ObjectMapper mapper = new ObjectMapper();
        JsonNode employeeJsonNode = mapper.createObjectNode()
                .put("name", "Michael Pratt")
                .put("title", "Java Developer")
                .put("yearsOfService", 2)
                .set("skills", mapper.createArrayNode()
                        .add("java")
                        .add("spring")
                        .add("elasticsearch"));
        jestClient.execute(new Index.Builder(employeeJsonNode.toString()).index("employees").build());
}

public static void main(String[] args) throws IOException {
        // Demo the JestClient
        JestClient jestClient = jestClient();
        // Delete documents
        jestClient.execute(new Delete.Builder("2") .index("employees") .build());
}

public static void main(String[] args) throws IOException {
        // Demo the JestClient
        JestClient jestClient = jestClient();
        // Update document
        employee.setYearsOfService(3);
        jestClient.execute(new Update.Builder(employee).index("employees").id("1").build());
}

public static void main(String[] args) throws IOException {
        // Demo the JestClient
        JestClient jestClient = jestClient();
        // Read document by ID
        Employee getResult = jestClient.execute(new Get.Builder("employees", "1").build()).getSourceAsObject(Employee.class);
}

public static void main(String[] args) throws IOException {
        // Demo the JestClient
        JestClient jestClient = jestClient();

        // Bulk operations
        Employee employeeObject1 = new Employee();
        employee.setName("John Smith");
        employee.setTitle("Python Developer");
        employee.setYearsOfService(10);
        employee.setSkills(Arrays.asList("python"));

        Employee employeeObject2 = new Employee();
        employee.setName("Kate Smith");
        employee.setTitle("Senior JavaScript Developer");
        employee.setYearsOfService(10);
        employee.setSkills(Arrays.asList("javascript", "angular"));

        jestClient.execute(new Bulk.Builder().defaultIndex("employees")
                .addAction(new Index.Builder(employeeObject1).build())
                .addAction(new Index.Builder(employeeObject2).build())
                .addAction(new Delete.Builder("3").build()) .build());
}