http://blog.csdn.net/changong28/article/details/38445805#comments

3.1 集群的连接

3.1.1 作为Elasticsearch节点

import static org.elasticsearch.node.NodeBuilder.nodeBuilder;

import org.elasticsearch.client.Client;

import org.elasticsearch.node.Node;

Node node = nodeBuilder().clusterName("escluster2").client(true).

node();

Client client = node.client();
 

3.1.2 使用Transport连接

import org.elasticsearch.client.transport.TransportClient;

import org.elasticsearch.common.settings.ImmutableSettings;

import org.elasticsearch.common.settings.Settings;

import org.elasticsearch.common.transport.InetSocketTransportAddress;

Settings settings = ImmutableSettings.settingsBuilder().put("cluster.name", "escluster2").build();

TransportClient client = new TransportClient(settings);

client.addTransportAddress(new InetSocketTransportAddress("127.0.0.1",9300));
 

3.2 文档的CRUD

3.2.1 查询文档

 
GetResponse response = client.prepareGet("library", "book", "1")

.setFields("title", "_source")

.execute().actionGet();

3.2.2 索引文档

import org.elasticsearch.action.index.IndexResponse;

import org.elasticsearch.client.Client;

IndexResponse response = client.prepareIndex("library", "book", "2")

.setSource("{ \"title\": \"Mastering ElasticSearch\"}")

.execute().actionGet();

3.2.3 更新文档

import org.elasticsearch.action.update.UpdateResponse;

import org.elasticsearch.client.Client;

import java.util.Map;

import org.elasticsearch.common.collect.Maps;

Map<String, Object> params = Maps.newHashMap();

params.put("ntitle", "ElasticSearch Server Book");

UpdateResponse response = client.prepareUpdate("library", "book", "2")

.setScript("ctx._source.title = ntitle")

.setScriptParams(params)

.execute().actionGet();

3.2.4 删除文档

import org.elasticsearch.action.delete.DeleteResponse;

import org.elasticsearch.client.Client;

DeleteResponse response = client.prepareDelete("library", "book", "2")

.execute().actionGet();

3.3 Elasticsearch检索

3.3.1 Preparing a query

import org.elasticsearch.action.search.SearchResponse;

import org.elasticsearch.client.Client;

import org.elasticsearch.search.SearchHit;

SearchResponse response = client.prepareSearch("library")

.addFields("title", "_source")

.execute().actionGet();

for(SearchHit hit: response.getHits().getHits()) {

<span style="white-space:pre">    </span>System.out.println(hit.getId());

<span style="white-space:pre">    </span>if (hit.getFields().containsKey("title")) {

<span style="white-space:pre">        </span>System.out.println("field.title: "+ hit.getFields().get("title").getValue());

<span style="white-space:pre">    </span>}

<span style="white-space:pre">    </span>System.out.println("source.title: " + hit.getSource().get("title"));

}

3.3.2 Building queries

import org.elasticsearch.index.query.QueryBuilder;

import org.elasticsearch.index.query.QueryBuilders;

QueryBuilder queryBuilder = QueryBuilders

.disMaxQuery()

.add(QueryBuilders.termQuery("title", "Elastic"))

.add(QueryBuilders.prefixQuery("title", "el"));

System.out.println(queryBuilder.toString());

SearchResponse response = client.prepareSearch("library")

.setQuery(queryBuilder)

.execute().actionGet();

3.3.3 Using the match all documents query

queryBuilder = QueryBuilders.matchAllQuery()

.boost(11f).normsField("title");

3.3.4 The match query

queryBuilder = QueryBuilders

.matchQuery("message", "a quick brown fox")

.operator(Operator.AND)

.zeroTermsQuery(ZeroTermsQuery.ALL);

3.3.5 Using the geo shape query

queryBuilder = QueryBuilders.geoShapeQuery("location",

ShapeBuilder.newRectangle()

.topLeft(13, 53)

.bottomRight(14, 52)

.build());

3.3.6 Paging query

SearchResponse response = client.prepareSearch("library")

.setQuery(QueryBuilders.matchAllQuery())

.setFrom(10)

.setSize(20)

.execute().actionGet();

3.3.7 Sorting

SearchResponse response = client.prepareSearch("library")

.setQuery(QueryBuilders.matchAllQuery())

.addSort(SortBuilders.fieldSort("title"))

.addSort("_score", SortOrder.DESC)

.execute().actionGet()

3.3.8 Filtering

FilterBuilder filterBuilder = FilterBuilders

.andFilter(

FilterBuilders.existsFilter("title").filterName("exist"),

FilterBuilders.termFilter("title", "elastic")

);

SearchResponse response = client.prepareSearch("library")

.setFilter(filterBuilder)

.execute().actionGet();

3.3.9 Faceting

FacetBuilder facetBuilder = FacetBuilders

.filterFacet("test")

.filter(FilterBuilders.termFilter("title", "elastic"));

SearchResponse response = client.prepareSearch("library")

.addFacet(facetBuilder)

.execute().actionGet();

3.3.10 Highlighting

SearchResponse response = client.prepareSearch("wikipedia")

.addHighlightedField("title")

.setQuery(QueryBuilders.termQuery("title", "actress"))

.setHighlighterPreTags("<1>", "<2>")

.setHighlighterPostTags("</1>", "</2>")

.execute().actionGet();

for(SearchHit hit: response.getHits().getHits()) {

<span style="white-space:pre">    </span>HighlightField hField = hit.getHighlightFields().get("title");

<span style="white-space:pre">    </span>for (Text t : hField.fragments()) {

<span style="white-space:pre">        </span>System.out.println(t.string());

<span style="white-space:pre">    </span>}

}

3.3.11 Suggestions

SearchResponse response = client.prepareSearch("wikipedia")

.setQuery(QueryBuilders.matchAllQuery())

.addSuggestion(new TermSuggestionBuilder("first_suggestion")

.text("graphics designer")

.field("_all"))

.execute().actionGet();

for( Entry<? extends Option> entry : response.getSuggest().getSuggestion("first_suggestion").getEntries()) {

<span style="white-space:pre">    </span>System.out.println("Check for: " + entry.getText() + ". Options:");

<span style="white-space:pre">    </span>for( Option option : entry.getOptions()) {

<span style="white-space:pre">        </span>System.out.println("\t" + option.getText());

<span style="white-space:pre">    </span>}

}

3.3.12 Counting

CountResponse response = client.prepareCount("library")

.setQuery(QueryBuilders.termQuery("title", "elastic"))

.execute().actionGet();

3.3.13 Scrolling

SearchResponse responseSearch = client.prepareSearch("library")

.setScroll("1m")

.setSearchType(SearchType.SCAN)

.execute().actionGet();

String scrollId = responseSearch.getScrollId();

SearchResponse response = client.prepareSearchScroll(scrollId).execute().actionGet();

3.3.14 Bulk

BulkResponse response = client.prepareBulk()

.add(client.prepareIndex("library", "book", "5")

.setSource("{ \"title\" : \"Solr Cookbook\"}")

.request())

.add(client.prepareDelete("library", "book", "2").request()).execute().actionGet();

3.3.15 The delete by query

DeleteByQueryResponse response = client.prepareDeleteByQuery("library")

.setQuery(QueryBuilders.termQuery("title", "ElasticSearch"))

.execute().actionGet();

3.3.16 Multi GET

MultiGetResponse response = client.prepareMultiGet()

.add("library", "book", "1", "2")

.execute().actionGet();

3.3.16 Multi Search

MultiSearchResponse response = client.prepareMultiSearch()

.add(client.prepareSearch("library", "book").request())

.add(client.prepareSearch("news").

.setFilter(FilterBuilders.termFilter("tags", "important")))

.execute().actionGet();

3.3.17 Building JSON queries and documents

IndexResponse response = client

.prepareIndex("library", "book", "2")

.setSource("{ \"title\": \"Mastering ElasticSearch\"}")

.execute().actionGet();

Map<String, Object> m = Maps.newHashMap();

m.put("1", "Introduction");

m.put("2", "Basics");

m.put("3", "And the rest");

XContentBuilder json = XContentFactory.jsonBuilder().prettyPrint()

.startObject()

.field("id").value("2123")

.field("lastCommentTime", new Date())

.nullField("published")

.field("chapters").map(m)

.field("title", "Mastering ElasticSearch")

.array("tags", "search", "ElasticSearch", "nosql")

.field("values")

.startArray()

.value(1)

.value(10)

.endArray()

.endObject();

3.4 The administration API

3.4.1 The cluster administration API

3.4.1.1 The cluster and indices health API

ClusterHealthResponse response = client.admin().cluster()

.prepareHealth("library")

.execute().actionGet();

3.4.1.2 The cluster state API

ClusterStateResponse response = client.admin().cluster()

.prepareState()

.execute().actionGet();

3.4.1.3 The update settings API

Map<String, Object> map = Maps.newHashMap();

map.put("indices.ttl.interval", "10m");

ClusterUpdateSettingsResponse response = client.admin().cluster()

.prepareUpdateSettings()

.setTransientSettings(map)

.execute().actionGet();

3.4.1.4 The reroute API

ClusterRerouteResponse response = client.admin().cluster()

.prepareReroute()

.setDryRun(true)

.add(new MoveAllocationCommand(new ShardId("library", 3), "G3czOt4HQbKZT1RhpPCULw",PvHtEMuRSJ6rLJ27AW3U6w"),

     new CancelAllocationCommand(new ShardId("library", 2), "G3czOt4HQbKZT1RhpPCULw",rue))

.execute().actionGet();

3.4.1.5 The nodes information API

NodesInfoResponse response = client.admin().cluster()

.prepareNodesInfo()

.setNetwork(true)

.setPlugin(true)

.execute().actionGet();

3.4.1.6 The node statistics API

NodesStatsResponse response = client.admin().cluster()

.prepareNodesStats()

.all()

.execute().actionGet();

3.4.1.7 The nodes hot threads API

NodesHotThreadsResponse response = client.admin().cluster()

.prepareNodesHotThreads()

.execute().actionGet();

3.4.1.8 The nodes shutdown API

NodesShutdownResponse response = client.admin().cluster()

.prepareNodesShutdown()

.execute().actionGet();

3.4.1.9 The search shards API

ClusterSearchShardsResponse response = client.admin().cluster()

.prepareSearchShards()

.setIndices("library")

.setRouting("12")

.execute().actionGet();

3.4.2 The Indices administration API

3.4.2.1 The index existence API

IndicesExistsResponse response = client.admin().indices()

.prepareExists("books", "library")

.execute().actionGet();

3.4.2.2 The Type existence API

TypesExistsResponse response = client.admin().indices()

.prepareTypesExists("library")

.setTypes("book")

.execute().actionGet();

3.4.2.3 The indices stats API

IndicesStatsResponse response = client.admin().indices()

.prepareStats("library")

.all()

.execute().actionGet();

3.4.2.4 Index status

IndicesStatusResponse response = client.admin().indices()

.prepareStatus("library")

.setRecovery(true)

.setSnapshot(true)

.execute().actionGet();

3.4.2.5 Segments information API

IndicesSegmentResponse response = client.admin().indices()

.prepareSegments("library")

.execute().actionGet();

3.4.2.6 Creating an index API

CreateIndexResponse response = client.admin().indices()

.prepareCreate("news")

.setSettings(ImmutableSettings.settingsBuilder()

.put("number_of_shards", 1))

.addMapping("news", XContentFactory.jsonBuilder()

.startObject()

.startObject("news")

.startObject("properties")

.startObject("title")

.field("analyzer", "whitespace")

.field("type", "string")

.endObject()

.endObject()

.endObject()

.endObject())

.execute().actionGet();

3.4.2.7 Deleting an index

DeleteIndexResponse response = client.admin().indices()

.prepareDelete("news")

.execute().actionGet();

3.4.2.8 Closing an index

CloseIndexResponse response = client.admin().indices()

.prepareClose("library")

.execute().actionGet();

3.4.2.9 Opening an index

OpenIndexResponse response = client.admin().indices()

.prepareOpen("library")

.execute().actionGet();

3.4.2.10 The Refresh API

RefreshResponse response = client.admin().indices()

.prepareRefresh("library")

.execute().actionGet();

3.4.2.11 The Flush API

FlushResponse response = client.admin().indices()

.prepareFlush("library")

.setFull(false)

.execute().actionGet();

3.4.2.12 The Optimize API

OptimizeResponse response = client.admin().indices()

.prepareOptimize("library")

.setMaxNumSegments(2)

.setFlush(true)

.setOnlyExpungeDeletes(false)

.execute().actionGet();

3.4.2.13 The put mapping API

PutMappingResponse response = client.admin().indices()

.preparePutMapping("news")

.setType("news")

.setSource(XContentFactory.jsonBuilder()

.startObject()

.startObject("news")

.startObject("properties")

.startObject("title")

.field("analyzer", "whitespace")

.field("type", "string")

.endObject()

.endObject()

.endObject()

.endObject())

.execute().actionGet();

3.4.2.14 The delete mapping API

DeleteMappingResponse response = client.admin().indices()

.prepareDeleteMapping("news")

.setType("news")

.execute().actionGet();

3.4.2.15 The gateway snapshot API

GatewaySnapshotResponse response = client.admin().indices()

.prepareGatewaySnapshot("news")

.execute().actionGet();

3.4.2.16 The aliases API

IndicesAliasesResponse response = client.admin().indices()

.prepareAliases()

.addAlias("news", "n")

.addAlias("library", "elastic_books",

FilterBuilders.termFilter("title", "elasticsearch"))

.removeAlias("news", "current_news")

.execute().actionGet();

3.4.2.17 The get aliases API

IndicesGetAliasesResponse response = client.admin().indices()

.prepareGetAliases("elastic_books", "n")

.execute().actionGet();

3.4.2.18 The aliases exists API

AliasesExistResponse response = client.admin().indices()

.prepareAliasesExist("elastic*", "unknown")

.execute().actionGet();

3.4.2.19 The clear cache API

ClearIndicesCacheResponse response = client.admin().indices()

.prepareClearCache("library")

.setFieldDataCache(true)

.setFields("title")

.setFilterCache(true)

.setIdCache(true)

.execute().actionGet();

3.4.2.20 The update settings API

UpdateSettingsResponse response = client.admin().indices()

.prepareUpdateSettings("library")

.setSettings(ImmutableSettings.builder()

.put("index.number_of_replicas", 2))

.execute().actionGet();

3.4.2.21 The analyze API

AnalyzeResponse response = client.admin().indices()

.prepareAnalyze("library", "ElasticSearch Servers")

.setTokenizer("whitespace")

.setTokenFilters("nGram")

.execute().actionGet();

3.4.2.22 The put template API

  1. PutIndexTemplateResponse response = client.admin().indices()
    
.preparePutTemplate("my_template")
    
.setTemplate("product*")
    
.setSettings(ImmutableSettings.builder()
    
.put("index.number_of_replicas", 2)
    
.put("index.number_of_shards", 1))
    
.addMapping("item", XContentFactory.jsonBuilder()
    
.startObject()
    
.startObject("item")
    
.startObject("properties")
    
.startObject("title")
    
.field("type", "string")
    
.endObject()
    
.endObject()
    
.endObject()
    
.endObject())
    
.execute().actionGet();

3.4.2.23 The delete template API

DeleteIndexTemplateResponse response = client.admin().indices()

.prepareDeleteTemplate("my_*")

.execute().actionGet();

3.4.2.24 The validate query API

ValidateQueryResponse response = client.admin().indices()

.prepareValidateQuery("library")

.setExplain(true)

.setQuery(XContentFactory.jsonBuilder()

.startObject()

.field("name").value("elastic search")

.endObject().bytes())

.execute().actionGet();

3.4.2.25 The put warmer API

PutWarmerResponse response = client.admin().indices()

.preparePutWarmer("library_warmer")

.setSearchRequest(client.prepareSearch("library")

.addFacet(FacetBuilders

.termsFacet("tags").field("tags")))

.execute().actionGet();

3.4.2.26 The delete warmer API

DeleteWarmerResponse response = client.admin().indices()

.prepareDeleteWarmer()

.setName("library_*")

.execute().actionGet();

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