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Elasticsearch Java API简要总汇

2024-09-03 14:07:03   220人阅读

 

3.1 集群的连接

3.1.1 作为Elasticsearch节点

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  1. 代码：  
  2. import static org.elasticsearch.node.NodeBuilder.nodeBuilder;  
  3. import org.elasticsearch.client.Client;  
  4. import org.elasticsearch.node.Node;  
  5.   
  6. Node node = nodeBuilder().clusterName("escluster2").client(true).  
  7. node();  
  8. Client client = node.client();  

3.1.2 使用Transport连接

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  1. 代码：  
  2. import org.elasticsearch.client.transport.TransportClient;  
  3. import org.elasticsearch.common.settings.ImmutableSettings;  
  4. import org.elasticsearch.common.settings.Settings;   
  5. import org.elasticsearch.common.transport.InetSocketTransportAddress;  
  6.   
  7. Settings settings = ImmutableSettings.settingsBuilder().put("cluster.name", "escluster2").build();  
  8. TransportClient client = new TransportClient(settings);  
  9. client.addTransportAddress(new InetSocketTransportAddress("127.0.0.1",9300));  

3.2 文档的CRUD

3.2.1 查询文档

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  1. 代码：  
  2. GetResponse response = client.prepareGet("library", "book", "1")  
  3. .setFields("title", "_source")  
  4. .execute().actionGet();  


3.2.2 索引文档

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  1. 代码：  
  2. import org.elasticsearch.action.index.IndexResponse;  
  3. import org.elasticsearch.client.Client;  
  4.   
  5. IndexResponse response = client.prepareIndex("library", "book", "2")  
  6. .setSource("{ \"title\": \"Mastering ElasticSearch\"}")  
  7. .execute().actionGet();  

3.2.3 更新文档

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  1. 代码：  
  2. import org.elasticsearch.action.update.UpdateResponse;  
  3. import org.elasticsearch.client.Client;  
  4. import java.util.Map;  
  5. import org.elasticsearch.common.collect.Maps;  
  6.   
  7. Map<String, Object> params = Maps.newHashMap();  
  8. params.put("ntitle", "ElasticSearch Server Book");  
  9. UpdateResponse response = client.prepareUpdate("library", "book", "2")  
  10. .setScript("ctx._source.title = ntitle")  
  11. .setScriptParams(params)  
  12. .execute().actionGet();  

3.2.4 删除文档

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  1. 代码：  
  2. import org.elasticsearch.action.delete.DeleteResponse;  
  3. import org.elasticsearch.client.Client;  
  4.   
  5. DeleteResponse response = client.prepareDelete("library", "book", "2")  
  6. .execute().actionGet();  

3.3 Elasticsearch检索

3.3.1 Preparing a query

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  1. 代码：  
  2. import org.elasticsearch.action.search.SearchResponse;  
  3. import org.elasticsearch.client.Client;  
  4. import org.elasticsearch.search.SearchHit;  
  5.   
  6. SearchResponse response = client.prepareSearch("library")  
  7. .addFields("title", "_source")  
  8. .execute().actionGet();  
  9. for(SearchHit hit: response.getHits().getHits()) {  
  10. <span style="white-space:pre">    </span>System.out.println(hit.getId());  
  11. <span style="white-space:pre">    </span>if (hit.getFields().containsKey("title")) {  
  12. <span style="white-space:pre">        </span>System.out.println("field.title: "+ hit.getFields().get("title").getValue());  
  13. <span style="white-space:pre">    </span>}  
  14. <span style="white-space:pre">    </span>System.out.println("source.title: " + hit.getSource().get("title"));  
  15. }  



3.3.2 Building queries

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  1. 代码：  
  2. import org.elasticsearch.index.query.QueryBuilder;  
  3. import org.elasticsearch.index.query.QueryBuilders;  
  4.   
  5. QueryBuilder queryBuilder = QueryBuilders  
  6. .disMaxQuery()  
  7. .add(QueryBuilders.termQuery("title", "Elastic"))  
  8. .add(QueryBuilders.prefixQuery("title", "el"));  
  9. System.out.println(queryBuilder.toString());  
  10. SearchResponse response = client.prepareSearch("library")  
  11. .setQuery(queryBuilder)  
  12. .execute().actionGet();  

3.3.3 Using the match all documents query

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  1. 代码：  
  2. queryBuilder = QueryBuilders.matchAllQuery()  
  3. .boost(11f).normsField("title");  

3.3.4 The match query

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  1. 代码：  
  2. queryBuilder = QueryBuilders  
  3. .matchQuery("message", "a quick brown fox")  
  4. .operator(Operator.AND)  
  5. .zeroTermsQuery(ZeroTermsQuery.ALL);  

3.3.5 Using the geo shape query

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  1. 代码：  
  2. queryBuilder = QueryBuilders.geoShapeQuery("location",  
  3. ShapeBuilder.newRectangle()  
  4. .topLeft(13, 53)  
  5. .bottomRight(14, 52)  
  6. .build());  

3.3.6 Paging query

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  1. 代码：  
  2. SearchResponse response = client.prepareSearch("library")  
  3. .setQuery(QueryBuilders.matchAllQuery())  
  4. .setFrom(10)  
  5. .setSize(20)  
  6. .execute().actionGet();  

3.3.7 Sorting

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  1. 代码：  
  2. SearchResponse response = client.prepareSearch("library")  
  3. .setQuery(QueryBuilders.matchAllQuery())  
  4. .addSort(SortBuilders.fieldSort("title"))  
  5. .addSort("_score", SortOrder.DESC)  
  6. .execute().actionGet()  

3.3.8 Filtering

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  1. 代码：  
  2. FilterBuilder filterBuilder = FilterBuilders  
  3. .andFilter(  
  4. FilterBuilders.existsFilter("title").filterName("exist"),  
  5. FilterBuilders.termFilter("title", "elastic")  
  6. );  
  7. SearchResponse response = client.prepareSearch("library")  
  8. .setFilter(filterBuilder)  
  9. .execute().actionGet();  


3.3.9 Faceting

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  1. 代码：  
  2. FacetBuilder facetBuilder = FacetBuilders  
  3. .filterFacet("test")  
  4. .filter(FilterBuilders.termFilter("title", "elastic"));  
  5. SearchResponse response = client.prepareSearch("library")  
  6. .addFacet(facetBuilder)  
  7. .execute().actionGet();  


3.3.10 Highlighting

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  1. 代码：  
  2. SearchResponse response = client.prepareSearch("wikipedia")  
  3. .addHighlightedField("title")  
  4. .setQuery(QueryBuilders.termQuery("title", "actress"))  
  5. .setHighlighterPreTags("<1>", "<2>")  
  6. .setHighlighterPostTags("</1>", "</2>")  
  7. .execute().actionGet();  
  8. for(SearchHit hit: response.getHits().getHits()) {  
  9. <span style="white-space:pre">    </span>HighlightField hField = hit.getHighlightFields().get("title");  
  10. <span style="white-space:pre">    </span>for (Text t : hField.fragments()) {  
  11. <span style="white-space:pre">        </span>System.out.println(t.string());  
  12. <span style="white-space:pre">    </span>}  
  13. }  

3.3.11 Suggestions

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  1. 代码：  
  2. SearchResponse response = client.prepareSearch("wikipedia")  
  3. .setQuery(QueryBuilders.matchAllQuery())  
  4. .addSuggestion(new TermSuggestionBuilder("first_suggestion")  
  5. .text("graphics designer")  
  6. .field("_all"))  
  7. .execute().actionGet();  
  8.   
  9. for( Entry<? extends Option> entry : response.getSuggest().getSuggestion("first_suggestion").getEntries()) {  
  10. <span style="white-space:pre">    </span>System.out.println("Check for: " + entry.getText() + ". Options:");  
  11. <span style="white-space:pre">    </span>for( Option option : entry.getOptions()) {  
  12. <span style="white-space:pre">        </span>System.out.println("\t" + option.getText());  
  13. <span style="white-space:pre">    </span>}  
  14. }  

3.3.12 Counting

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  1. 代码：  
  2. CountResponse response = client.prepareCount("library")  
  3. .setQuery(QueryBuilders.termQuery("title", "elastic"))  
  4. .execute().actionGet();  

3.3.13 Scrolling

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  1. 代码：  
  2. SearchResponse responseSearch = client.prepareSearch("library")  
  3. .setScroll("1m")  
  4. .setSearchType(SearchType.SCAN)  
  5. .execute().actionGet();  
  6. String scrollId = responseSearch.getScrollId();  
  7. SearchResponse response = client.prepareSearchScroll(scrollId).execute().actionGet();  

3.3.14 Bulk

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  1. 代码：  
  2. BulkResponse response = client.prepareBulk()  
  3. .add(client.prepareIndex("library", "book", "5")  
  4. .setSource("{ \"title\" : \"Solr Cookbook\"}")  
  5. .request())  
  6. .add(client.prepareDelete("library", "book", "2").request()).execute().actionGet();  

3.3.15 The delete by query

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  1. 代码：  
  2. DeleteByQueryResponse response = client.prepareDeleteByQuery("library")  
  3. .setQuery(QueryBuilders.termQuery("title", "ElasticSearch"))  
  4. .execute().actionGet();  


3.3.16 Multi GET

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  1. 代码：  
  2. MultiGetResponse response = client.prepareMultiGet()  
  3. .add("library", "book", "1", "2")  
  4. .execute().actionGet();  


3.3.16 Multi Search

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  1. 代码：  
  2. MultiSearchResponse response = client.prepareMultiSearch()  
  3. .add(client.prepareSearch("library", "book").request())  
  4. .add(client.prepareSearch("news").  
  5. .setFilter(FilterBuilders.termFilter("tags", "important")))  
  6. .execute().actionGet();  


3.3.17 Building JSON queries and documents

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  1. 代码：  
  2. IndexResponse response = client  
  3. .prepareIndex("library", "book", "2")  
  4. .setSource("{ \"title\": \"Mastering ElasticSearch\"}")  
  5. .execute().actionGet();  
  6.   
  7. Map<String, Object> m = Maps.newHashMap();  
  8. m.put("1", "Introduction");  
  9. m.put("2", "Basics");  
  10. m.put("3", "And the rest");  
  11. XContentBuilder json = XContentFactory.jsonBuilder().prettyPrint()  
  12. .startObject()  
  13. .field("id").value("2123")  
  14. .field("lastCommentTime", new Date())  
  15. .nullField("published")  
  16. .field("chapters").map(m)  
  17. .field("title", "Mastering ElasticSearch")  
  18. .array("tags", "search", "ElasticSearch", "nosql")  
  19. .field("values")  
  20. .startArray()  
  21. .value(1)  
  22. .value(10)  
  23. .endArray()  
  24. .endObject();  

3.4 The administration API

3.4.1 The cluster administration API

3.4.1.1 The cluster and indices health API

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  1. 代码：  
  2. ClusterHealthResponse response = client.admin().cluster()  
  3. .prepareHealth("library")  
  4. .execute().actionGet();  

3.4.1.2 The cluster state API

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  1. 代码：  
  2. ClusterStateResponse response = client.admin().cluster()  
  3. .prepareState()  
  4. .execute().actionGet();  

3.4.1.3 The update settings API

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  1. 代码：  
  2. Map<String, Object> map = Maps.newHashMap();  
  3. map.put("indices.ttl.interval", "10m");  
  4. ClusterUpdateSettingsResponse response = client.admin().cluster()  
  5. .prepareUpdateSettings()  
  6. .setTransientSettings(map)  
  7. .execute().actionGet();  

3.4.1.4 The reroute API

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  1. 代码：  
  2. ClusterRerouteResponse response = client.admin().cluster()  
  3. .prepareReroute()  
  4. .setDryRun(true)  
  5. .add(new MoveAllocationCommand(new ShardId("library", 3), "G3czOt4HQbKZT1RhpPCULw",PvHtEMuRSJ6rLJ27AW3U6w"),  
  6.      new CancelAllocationCommand(new ShardId("library", 2), "G3czOt4HQbKZT1RhpPCULw",rue))  
  7. .execute().actionGet();  

3.4.1.5 The nodes information API

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  1. 代码：  
  2. NodesInfoResponse response = client.admin().cluster()  
  3. .prepareNodesInfo()  
  4. .setNetwork(true)  
  5. .setPlugin(true)  
  6. .execute().actionGet();  

3.4.1.6 The node statistics API

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  1. 代码：  
  2. NodesStatsResponse response = client.admin().cluster()  
  3. .prepareNodesStats()  
  4. .all()  
  5. .execute().actionGet();  

3.4.1.7 The nodes hot threads API

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  1. 代码：  
  2. NodesHotThreadsResponse response = client.admin().cluster()  
  3. .prepareNodesHotThreads()  
  4. .execute().actionGet();  

3.4.1.8 The nodes shutdown API

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  1. 代码：  
  2. NodesShutdownResponse response = client.admin().cluster()  
  3. .prepareNodesShutdown()  
  4. .execute().actionGet();  

3.4.1.9 The search shards API

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  1. 代码：  
  2. ClusterSearchShardsResponse response = client.admin().cluster()  
  3. .prepareSearchShards()  
  4. .setIndices("library")  
  5. .setRouting("12")  
  6. .execute().actionGet();  

3.4.2 The Indices administration API

3.4.2.1 The index existence API

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  1. 代码：  
  2. IndicesExistsResponse response = client.admin().indices()  
  3. .prepareExists("books", "library")  
  4. .execute().actionGet();  


3.4.2.2 The Type existence API

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  1. 代码：  
  2. TypesExistsResponse response = client.admin().indices()  
  3. .prepareTypesExists("library")  
  4. .setTypes("book")  
  5. .execute().actionGet();  


3.4.2.3 The indices stats API

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  1. 代码：  
  2. IndicesStatsResponse response = client.admin().indices()  
  3. .prepareStats("library")  
  4. .all()  
  5. .execute().actionGet();  


3.4.2.4 Index status

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  1. 代码：  
  2. IndicesStatusResponse response = client.admin().indices()  
  3. .prepareStatus("library")  
  4. .setRecovery(true)  
  5. .setSnapshot(true)  
  6. .execute().actionGet();  


3.4.2.5 Segments information API

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  1. 代码：  
  2. IndicesSegmentResponse response = client.admin().indices()  
  3. .prepareSegments("library")  
  4. .execute().actionGet();  


3.4.2.6 Creating an index API

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  1. 代码：  
  2. CreateIndexResponse response = client.admin().indices()  
  3. .prepareCreate("news")  
  4. .setSettings(ImmutableSettings.settingsBuilder()  
  5. .put("number_of_shards", 1))  
  6. .addMapping("news", XContentFactory.jsonBuilder()  
  7. .startObject()  
  8. .startObject("news")  
  9. .startObject("properties")  
  10. .startObject("title")  
  11. .field("analyzer", "whitespace")  
  12. .field("type", "string")  
  13. .endObject()  
  14. .endObject()  
  15. .endObject()  
  16. .endObject())  
  17. .execute().actionGet();  


3.4.2.7 Deleting an index

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  1. 代码：  
  2. DeleteIndexResponse response = client.admin().indices()  
  3. .prepareDelete("news")  
  4. .execute().actionGet();  


3.4.2.8 Closing an index

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  1. 代码：  
  2. CloseIndexResponse response = client.admin().indices()  
  3. .prepareClose("library")  
  4. .execute().actionGet();  


3.4.2.9 Opening an index

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  1. 代码：  
  2. OpenIndexResponse response = client.admin().indices()  
  3. .prepareOpen("library")  
  4. .execute().actionGet();  


3.4.2.10 The Refresh API

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  1. 代码：  
  2. RefreshResponse response = client.admin().indices()  
  3. .prepareRefresh("library")  
  4. .execute().actionGet();  


3.4.2.11 The Flush API

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  1. 代码：  
  2. FlushResponse response = client.admin().indices()  
  3. .prepareFlush("library")  
  4. .setFull(false)  
  5. .execute().actionGet();  


3.4.2.12 The Optimize API

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  1. 代码：  
  2. OptimizeResponse response = client.admin().indices()  
  3. .prepareOptimize("library")  
  4. .setMaxNumSegments(2)  
  5. .setFlush(true)  
  6. .setOnlyExpungeDeletes(false)  
  7. .execute().actionGet();  


3.4.2.13 The put mapping API

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  1. 代码：  
  2. PutMappingResponse response = client.admin().indices()  
  3. .preparePutMapping("news")  
  4. .setType("news")  
  5. .setSource(XContentFactory.jsonBuilder()  
  6. .startObject()  
  7. .startObject("news")  
  8. .startObject("properties")  
  9. .startObject("title")  
  10. .field("analyzer", "whitespace")  
  11. .field("type", "string")  
  12. .endObject()  
  13. .endObject()  
  14. .endObject()  
  15. .endObject())  
  16. .execute().actionGet();  


3.4.2.14 The delete mapping API

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  1. 代码：  
  2. DeleteMappingResponse response = client.admin().indices()  
  3. .prepareDeleteMapping("news")  
  4. .setType("news")  
  5. .execute().actionGet();  


3.4.2.15 The gateway snapshot API

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  1. 代码：  
  2. GatewaySnapshotResponse response = client.admin().indices()  
  3. .prepareGatewaySnapshot("news")  
  4. .execute().actionGet();  

3.4.2.16 The aliases API

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  1. 代码：  
  2. IndicesAliasesResponse response = client.admin().indices()  
  3. .prepareAliases()  
  4. .addAlias("news", "n")  
  5. .addAlias("library", "elastic_books",   
  6. FilterBuilders.termFilter("title", "elasticsearch"))  
  7. .removeAlias("news", "current_news")  
  8. .execute().actionGet();  


3.4.2.17 The get aliases API

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  1. 代码：  
  2. IndicesGetAliasesResponse response = client.admin().indices()  
  3. .prepareGetAliases("elastic_books", "n")  
  4. .execute().actionGet();  


3.4.2.18 The aliases exists API

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  1. 代码：  
  2. AliasesExistResponse response = client.admin().indices()  
  3. .prepareAliasesExist("elastic*", "unknown")  
  4. .execute().actionGet();  


3.4.2.19 The clear cache API

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  1. 代码：  
  2. ClearIndicesCacheResponse response = client.admin().indices()  
  3. .prepareClearCache("library")  
  4. .setFieldDataCache(true)  
  5. .setFields("title")  
  6. .setFilterCache(true)  
  7. .setIdCache(true)  
  8. .execute().actionGet();  


3.4.2.20 The update settings API

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  1. 代码：  
  2. UpdateSettingsResponse response = client.admin().indices()  
  3. .prepareUpdateSettings("library")  
  4. .setSettings(ImmutableSettings.builder()  
  5. .put("index.number_of_replicas", 2))  
  6. .execute().actionGet();  


3.4.2.21 The analyze API

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  1. 代码：  
  2. AnalyzeResponse response = client.admin().indices()  
  3. .prepareAnalyze("library", "ElasticSearch Servers")  
  4. .setTokenizer("whitespace")  
  5. .setTokenFilters("nGram")  
  6. .execute().actionGet();  


3.4.2.22 The put template API

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  1. 代码：  
  2. PutIndexTemplateResponse response = client.admin().indices()  
  3. .preparePutTemplate("my_template")  
  4. .setTemplate("product*")  
  5. .setSettings(ImmutableSettings.builder()  
  6. .put("index.number_of_replicas", 2)  
  7. .put("index.number_of_shards", 1))  
  8. .addMapping("item", XContentFactory.jsonBuilder()  
  9. .startObject()  
  10. .startObject("item")  
  11. .startObject("properties")  
  12. .startObject("title")  
  13. .field("type", "string")  
  14. .endObject()  
  15. .endObject()  
  16. .endObject()  
  17. .endObject())  
  18. .execute().actionGet();  


3.4.2.23 The delete template API

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  1. 代码：  
  2. DeleteIndexTemplateResponse response = client.admin().indices()  
  3. .prepareDeleteTemplate("my_*")  
  4. .execute().actionGet();  


3.4.2.24 The validate query API

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  1. 代码：  
  2. ValidateQueryResponse response = client.admin().indices()  
  3. .prepareValidateQuery("library")  
  4. .setExplain(true)  
  5. .setQuery(XContentFactory.jsonBuilder()  
  6. .startObject()  
  7. .field("name").value("elastic search")  
  8. .endObject().bytes())  
  9. .execute().actionGet();  

3.4.2.25 The put warmer API

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  1. 代码：  
  2. PutWarmerResponse response = client.admin().indices()  
  3. .preparePutWarmer("library_warmer")  
  4. .setSearchRequest(client.prepareSearch("library")  
  5. .addFacet(FacetBuilders  
  6. .termsFacet("tags").field("tags")))  
  7. .execute().actionGet();  

3.4.2.26 The delete warmer API

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  1. 代码：  
  2. DeleteWarmerResponse response = client.admin().indices()  
  3. .prepareDeleteWarmer()  
  4. .setName("library_*")  
  5. .execute().actionGet();  


















































































 


 










Elasticsearch Java API简要总汇






























        

            
                
                  
                
                

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