Elasticsearch Java Client 版本區別及起步(5.X 和6.X)
阿新 • • 發佈：2019-07-13
簡單總結：
- 如果服務端是5.6以下的，選擇相同版本的TransportClient，避免一些API服務端不支援
- 如果服務端是5.6以上的，選擇相同版本的RestClient
TransportClient起步：
5.6及之前的版本：
// on startup Client client = TransportClient.builder().build() .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host1"), 9300)) .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host2"), 9300)); // on shutdown client.close();
6.0及之後的版本：
// on startup TransportClient client = new PreBuiltTransportClient(Settings.EMPTY) .addTransportAddress(new TransportAddress(InetAddress.getByName("host1"), 9300)) .addTransportAddress(new TransportAddress(InetAddress.getByName("host2"), 9300)); // on shutdown client.close();
TransportClient傳送搜尋請求：
SearchResponse response = client.prepareSearch("index1", "index2") .setTypes("type1", "type2") .setSearchType(SearchType.DFS_QUERY_THEN_FETCH) .setQuery(QueryBuilders.termQuery("multi", "test")) // Query .setPostFilter(QueryBuilders.rangeQuery("age").from(12).to(18)) // Filter .setFrom(0).setSize(60).setExplain(true) .get();
HttpClient起步：
// Java Low Level REST Client
RestClient lowLevelRestClient = RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")).build();
// Java High Level REST Client
RestHighLevelClient client = new RestHighLevelClient(lowLevelRestClient);HttpClient傳送搜尋請求：
SearchRequest searchRequest = new SearchRequest();
searchRequest.source(sourceBuilder);
SearchResponse searchResponse = client.search(searchRequest);