Create Index API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
CreateIndexRequest request = new CreateIndexRequest("twitter_two");//創建索引
//創建的每個索引都可以有與之關聯的特定設置。
request.settings(Settings.builder()
.put("index.number_of_shards", 3)
.put("index.number_of_replicas", 2)
);
//創建索引時創建文檔類型映射
request.mapping("tweet",//類型定義
" {\n" +
" \"tweet\": {\n" +
" \"properties\": {\n" +
" \"message\": {\n" +
" \"type\": \"text\"\n" +
" }\n" +
" }\n" +
" }\n" +
" }",//類型映射,需要的是一個JSON字符串
XContentType.JSON);
//為索引設置一個別名
request.alias(
new Alias("twitter_alias")
);
//可選參數
request.timeout(TimeValue.timeValueMinutes(2));//超時,等待所有節點被確認(使用TimeValue方式)
//request.timeout("2m");//超時,等待所有節點被確認(使用字符串方式)
request.masterNodeTimeout(TimeValue.timeValueMinutes(1));//連接master節點的超時時間(使用TimeValue方式)
//request.masterNodeTimeout("1m");//連接master節點的超時時間(使用字符串方式)
request.waitForActiveShards(2);//在創建索引API返回響應之前等待的活動分片副本的數量,以int形式表示。
//request.waitForActiveShards(ActiveShardCount.DEFAULT);//在創建索引API返回響應之前等待的活動分片副本的數量,以ActiveShardCount形式表示。
//同步執行
CreateIndexResponse createIndexResponse = client.indices().create(request);
//異步執行
//異步執行創建索引請求需要將CreateIndexRequest實例和ActionListener實例傳遞給異步方法:
//CreateIndexResponse的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<CreateIndexResponse> listener = new ActionListener<CreateIndexResponse>() {
@Override
public void onResponse(CreateIndexResponse createIndexResponse) {
//如果執行成功,則調用onResponse方法;
}
@Override
public void onFailure(Exception e) {
//如果失敗,則調用onFailure方法。
}
};
client.indices().createAsync(request, listener);//要執行的CreateIndexRequest和執行完成時要使用的ActionListener
//返回的CreateIndexResponse允許檢索有關執行的操作的信息,如下所示:
boolean acknowledged = createIndexResponse.isAcknowledged();//指示是否所有節點都已確認請求
boolean shardsAcknowledged = createIndexResponse.isShardsAcknowledged();//指示是否在超時之前為索引中的每個分片啟動了必需的分片副本數
Delete Index API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
DeleteIndexRequest request = new DeleteIndexRequest("twitter_two");//指定要刪除的索引名稱
//可選參數:
request.timeout(TimeValue.timeValueMinutes(2)); //設置超時,等待所有節點確認索引刪除(使用TimeValue形式)
// request.timeout("2m"); //設置超時,等待所有節點確認索引刪除(使用字符串形式)
request.masterNodeTimeout(TimeValue.timeValueMinutes(1));連接master節點的超時時間(使用TimeValue方式)
// request.masterNodeTimeout("1m");//連接master節點的超時時間(使用字符串方式)
//設置IndicesOptions控制如何解決不可用的索引以及如何擴展通配符表達式
request.indicesOptions(IndicesOptions.lenientExpandOpen());
//同步執行
DeleteIndexResponse deleteIndexResponse = client.indices().delete(request);
/* //異步執行刪除索引請求需要將DeleteIndexRequest實例和ActionListener實例傳遞給異步方法:
//DeleteIndexResponse的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<DeleteIndexResponse> listener = new ActionListener<DeleteIndexResponse>() {
@Override
public void onResponse(DeleteIndexResponse deleteIndexResponse) {
//如果執行成功,則調用onResponse方法;
}
@Override
public void onFailure(Exception e) {
//如果失敗,則調用onFailure方法。
}
};
client.indices().deleteAsync(request, listener);*/
//Delete Index Response
//返回的DeleteIndexResponse允許檢索有關執行的操作的信息,如下所示:
boolean acknowledged = deleteIndexResponse.isAcknowledged();//是否所有節點都已確認請求
//如果找不到索引,則會拋出ElasticsearchException:
try {
request = new DeleteIndexRequest("does_not_exist");
client.indices().delete(request);
} catch (ElasticsearchException exception) {
if (exception.status() == RestStatus.NOT_FOUND) {
//如果沒有找到要刪除的索引,要執行某些操作
}
}
Open Index API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
OpenIndexRequest request = new OpenIndexRequest("twitter");//打開索引
//可選參數:
request.timeout(TimeValue.timeValueMinutes(2)); //設置超時,等待所有節點確認索引已打開(使用TimeValue形式)
// request.timeout("2m"); //設置超時,等待所有節點確認索引已打開(使用字符串形式)
request.masterNodeTimeout(TimeValue.timeValueMinutes(1));連接master節點的超時時間(使用TimeValue方式)
// request.masterNodeTimeout("1m");//連接master節點的超時時間(使用字符串方式)
request.waitForActiveShards(2);//在打開索引API返回響應之前等待的活動分片副本的數量,以int形式表示。
//request.waitForActiveShards(ActiveShardCount.ONE);//在打開索引API返回響應之前等待的活動分片副本的數量,以ActiveShardCount形式表示。
//設置IndicesOptions控制如何解決不可用的索引以及如何擴展通配符表達式
request.indicesOptions(IndicesOptions.strictExpandOpen());
//同步執行
OpenIndexResponse openIndexResponse = client.indices().open(request);
/*//異步執行打開索引請求需要將OpenIndexRequest實例和ActionListener實例傳遞給異步方法:
//OpenIndexResponse的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<OpenIndexResponse> listener = new ActionListener<OpenIndexResponse>() {
@Override
public void onResponse(OpenIndexResponse openIndexResponse) {
//如果執行成功,則調用onResponse方法;
}
@Override
public void onFailure(Exception e) {
//如果失敗,則調用onFailure方法。
}
};
client.indices().openAsync(request, listener);*/
//Open Index Response
//返回的OpenIndexResponse允許檢索有關執行的操作的信息,如下所示:
boolean acknowledged = openIndexResponse.isAcknowledged();//指示是否所有節點都已確認請求
boolean shardsAcknowledged = openIndexResponse.isShardsAcknowledged();//指示是否在超時之前為索引中的每個分片啟動了必需的分片副本數
Close Index API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
CloseIndexRequest request = new CloseIndexRequest("index");//關閉索引
//可選參數:
request.timeout(TimeValue.timeValueMinutes(2)); //設置超時,等待所有節點確認索引已關閉(使用TimeValue形式)
// request.timeout("2m"); //設置超時,等待所有節點確認索引已關閉(使用字符串形式)
request.masterNodeTimeout(TimeValue.timeValueMinutes(1));連接master節點的超時時間(使用TimeValue方式)
// request.masterNodeTimeout("1m");//連接master節點的超時時間(使用字符串方式)
//設置IndicesOptions控制如何解決不可用的索引以及如何擴展通配符表達式
request.indicesOptions(IndicesOptions.lenientExpandOpen());
//同步執行
CloseIndexResponse closeIndexResponse = client.indices().close(request);
/*//異步執行打開索引請求需要將CloseIndexRequest實例和ActionListener實例傳遞給異步方法:
//CloseIndexResponse的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<CloseIndexResponse> listener = new ActionListener<CloseIndexResponse>() {
@Override
public void onResponse(CloseIndexResponse closeIndexResponse) {
//如果執行成功,則調用onResponse方法;
}
@Override
public void onFailure(Exception e) {
//如果失敗,則調用onFailure方法。
}
};
client.indices().closeAsync(request, listener); */
//Close Index Response
//返回的CloseIndexResponse 允許檢索有關執行的操作的信息,如下所示:
boolean acknowledged = closeIndexResponse.isAcknowledged(); //指示是否所有節點都已確認請求
Single document APIs
Index API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
IndexRequest indexRequest1 = new IndexRequest(
"posts",//索引名稱
"doc",//類型名稱
"1");//文檔ID
//==============================提供文檔源========================================
//方式1:以字符串形式提供
String jsonString = "{" +
"\"user\":\"kimchy\"," +
"\"postDate\":\"2013-01-30\"," +
"\"message\":\"trying out Elasticsearch\"" +
"}";
indexRequest1.source(jsonString, XContentType.JSON);
//方式2:以Map形式提供
Map<String, Object> jsonMap = new HashMap<>();
jsonMap.put("user", "kimchy");
jsonMap.put("postDate", new Date());
jsonMap.put("message", "trying out Elasticsearch");
//Map會自動轉換為JSON格式的文檔源
IndexRequest indexRequest2 = new IndexRequest("posts", "doc", "1")
.source(jsonMap);
// 方式3:文檔源以XContentBuilder對象的形式提供,Elasticsearch內部會幫我們生成JSON內容
XContentBuilder builder = XContentFactory.jsonBuilder();
builder.startObject();
{
builder.field("user", "kimchy");
builder.field("postDate", new Date());
builder.field("message", "trying out Elasticsearch");
}
builder.endObject();
IndexRequest indexRequest3 = new IndexRequest("posts", "doc", "1")
.source(builder);
//方式4:以Object key-pairs提供的文檔源,它會被轉換為JSON格式
IndexRequest indexRequest4 = new IndexRequest("posts", "doc", "1")
.source("user", "kimchy",
"postDate", new Date(),
"message", "trying out Elasticsearch");
//===============================可選參數start====================================
indexRequest1.routing("routing");//設置路由值
indexRequest1.parent("parent");//設置parent值
//設置超時:等待主分片變得可用的時間
indexRequest1.timeout(TimeValue.timeValueSeconds(1));//TimeValue方式
indexRequest1.timeout("1s");//字符串方式
//刷新策略
indexRequest1.setRefreshPolicy(WriteRequest.RefreshPolicy.WAIT_UNTIL);//WriteRequest.RefreshPolicy實例方式
indexRequest1.setRefreshPolicy("wait_for");//字符串方式
indexRequest1.version(2);//設置版本
indexRequest1.versionType(VersionType.EXTERNAL);//設置版本類型
//操作類型
indexRequest1.opType(DocWriteRequest.OpType.CREATE);//DocWriteRequest.OpType方式
indexRequest1.opType("create");//字符串方式, 可以是 create 或 update (默認)
//The name of the ingest pipeline to be executed before indexing the document
indexRequest1.setPipeline("pipeline");
//===============================執行====================================
//同步執行
IndexResponse indexResponse = client.index(indexRequest1);
//異步執行
//IndexResponse 的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<IndexResponse> listener = new ActionListener<IndexResponse>() {
@Override
public void onResponse(IndexResponse indexResponse) {
//執行成功時調用。 Response以參數方式提供
}
@Override
public void onFailure(Exception e) {
//在失敗的情況下調用。 引發的異常以參數方式提供
}
};
//異步執行索引請求需要將IndexRequest實例和ActionListener實例傳遞給異步方法:
client.indexAsync(indexRequest2, listener);
//Index Response
//返回的IndexResponse允許檢索有關執行操作的信息,如下所示:
String index = indexResponse.getIndex();
String type = indexResponse.getType();
String id = indexResponse.getId();
long version = indexResponse.getVersion();
if (indexResponse.getResult() == DocWriteResponse.Result.CREATED) {
//處理(如果需要)第一次創建文檔的情況
} else if (indexResponse.getResult() == DocWriteResponse.Result.UPDATED) {
//處理(如果需要)文檔被重寫的情況
}
ReplicationResponse.ShardInfo shardInfo = indexResponse.getShardInfo();
if (shardInfo.getTotal() != shardInfo.getSuccessful()) {
//處理成功分片數量少於總分片數量的情況
}
if (shardInfo.getFailed() > 0) {
for (ReplicationResponse.ShardInfo.Failure failure : shardInfo.getFailures()) {
String reason = failure.reason();//處理潛在的失敗
}
}
//如果存在版本沖突,則會拋出ElasticsearchException:
IndexRequest request = new IndexRequest("posts", "doc", "1")
.source("field", "value")
.version(1);
try {
IndexResponse response = client.index(request);
} catch(ElasticsearchException e) {
if (e.status() == RestStatus.CONFLICT) {
//引發的異常表示返回了版本沖突錯誤
}
}
//如果opType設置為創建但是具有相同索引,類型和ID的文檔已存在,則也會發生同樣的情況:
request = new IndexRequest("posts", "doc", "1")
.source("field", "value")
.opType(DocWriteRequest.OpType.CREATE);
try {
IndexResponse response = client.index(request);
} catch(ElasticsearchException e) {
if (e.status() == RestStatus.CONFLICT) {
//引發的異常表示返回了版本沖突錯誤
}
}
Get API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
GetRequest getRequest = new GetRequest(
"posts",//索引
"doc",//類型
"1");//文檔ID
//===============================可選參數start====================================
//禁用_source檢索,默認為啟用
getRequest.fetchSourceContext(new FetchSourceContext(false));
//為特定字段配置_source_include
String[] includes = new String[]{"message", "*Date"};
String[] excludes = Strings.EMPTY_ARRAY;
FetchSourceContext fetchSourceContext = new FetchSourceContext(true, includes, excludes);
getRequest.fetchSourceContext(fetchSourceContext);
//為指定字段配置_source_exclude
String[] includes1 = Strings.EMPTY_ARRAY;
String[] excludes1 = new String[]{"message"};
FetchSourceContext fetchSourceContext1 = new FetchSourceContext(true, includes, excludes);
getRequest.fetchSourceContext(fetchSourceContext);
//配置指定stored_fields的檢索(要求字段在映射中單獨存儲)
getRequest.storedFields("message");
GetResponse getResponse = client.get(getRequest);
//檢索message 存儲字段(要求將字段分開存儲在映射中)
String message = getResponse.getField("message").getValue();
getRequest.routing("routing");//設置routing值
getRequest.parent("parent");//設置parent值
getRequest.preference("preference");//設置preference值
getRequest.realtime(false);//設置realtime為false,默認是true
getRequest.refresh(true);//在檢索文檔之前執行刷新(默認為false)
getRequest.version(2);//設置版本
getRequest.versionType(VersionType.EXTERNAL);//設置版本類型
//===============================可選參數end====================================
//同步執行
GetResponse getResponse1 = client.get(getRequest);
//異步執行
//GetResponse 的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<GetResponse> listener = new ActionListener<GetResponse>() {
@Override
public void onResponse(GetResponse getResponse) {
//執行成功時調用。 Response以參數方式提供
}
@Override
public void onFailure(Exception e) {
//在失敗的情況下調用。 引發的異常以參數方式提供
}
};
//異步執行獲取索引請求需要將GetRequest 實例和ActionListener實例傳遞給異步方法:
client.getAsync(getRequest, listener);
//Get Response
//返回的GetResponse允許檢索請求的文檔及其元數據和最終存儲的字段。
String index = getResponse.getIndex();
String type = getResponse.getType();
String id = getResponse.getId();
if (getResponse.isExists()) {
long version = getResponse.getVersion();
String sourceAsString = getResponse.getSourceAsString();//檢索文檔(String形式)
Map<String, Object> sourceAsMap = getResponse.getSourceAsMap();//檢索文檔(Map<String, Object>形式)
byte[] sourceAsBytes = getResponse.getSourceAsBytes();//檢索文檔(byte[]形式)
} else {
/* 處理找不到文檔的情況。 請注意,盡管返回404狀態碼,
但返回的是有效的GetResponse,而不是拋出的異常。
此類Response不包含任何源文檔,並且其isExists方法返回false。*/
}
//當針對不存在的索引執行獲取請求時,響應404狀態碼,將引發ElasticsearchException,需要按如下方式處理:
GetRequest request = new GetRequest("does_not_exist", "doc", "1");
try {
GetResponse getResponse2 = client.get(request);
} catch (ElasticsearchException e) {
if (e.status() == RestStatus.NOT_FOUND) {
//處理因為索引不存在而拋出的異常情況
}
}
//如果請求了特定的文檔版本,並且現有文檔具有不同的版本號,則會引發版本沖突:
try {
GetRequest request1 = new GetRequest("posts", "doc", "1").version(2);
GetResponse getResponse3 = client.get(request);
} catch (ElasticsearchException exception) {
if (exception.status() == RestStatus.CONFLICT) {
//引發的異常表示返回了版本沖突錯誤
}
}
Delete API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
DeleteRequest request = new DeleteRequest (
"posts",//索引
"doc",//類型
"1");//文檔ID
//===============================可選參數====================================
request.routing("routing");//設置routing值
request.parent("parent");//設置parent值
//設置超時:等待主分片變得可用的時間
request.timeout(TimeValue.timeValueMinutes(2));//TimeValue方式
request.timeout("1s");//字符串方式
//刷新策略
request.setRefreshPolicy(WriteRequest.RefreshPolicy.WAIT_UNTIL);//WriteRequest.RefreshPolicy實例方式
request.setRefreshPolicy("wait_for");//字符串方式
request.version(2);//設置版本
request.versionType(VersionType.EXTERNAL);//設置版本類型
//同步執行
DeleteResponse deleteResponse = client.delete(request);
//異步執行
//DeleteResponse 的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<DeleteResponse > listener = new ActionListener<DeleteResponse >() {
@Override
public void onResponse(DeleteResponse getResponse) {
//執行成功時調用。 Response以參數方式提供
}
@Override
public void onFailure(Exception e) {
//在失敗的情況下調用。 引發的異常以參數方式提供
}
};
//異步執行獲取索引請求需要將DeleteRequest 實例和ActionListener實例傳遞給異步方法:
client.deleteAsync(request, listener);
//Delete Response
//返回的DeleteResponse允許檢索有關執行操作的信息,如下所示:
String index = deleteResponse.getIndex();
String type = deleteResponse.getType();
String id = deleteResponse.getId();
long version = deleteResponse.getVersion();
ReplicationResponse.ShardInfo shardInfo = deleteResponse.getShardInfo();
if (shardInfo.getTotal() != shardInfo.getSuccessful()) {
//處理成功分片數量少於總分片數量的情況
}
if (shardInfo.getFailed() > 0) {
for (ReplicationResponse.ShardInfo.Failure failure : shardInfo.getFailures()) {
String reason = failure.reason();//處理潛在的失敗
}
}
//還可以檢查文檔是否被找到:
DeleteRequest request1 = new DeleteRequest("posts", "doc", "does_not_exist");
DeleteResponse deleteResponse1 = client.delete(request);
if (deleteResponse.getResult() == DocWriteResponse.Result.NOT_FOUND) {
//如果找不到要刪除的文檔,執行某些操作
}
//如果存在版本沖突,則會拋出ElasticsearchException:
try {
DeleteRequest request2 = new DeleteRequest("posts", "doc", "1").version(2);
DeleteResponse deleteResponse2 = client.delete(request);
} catch (ElasticsearchException exception) {
if (exception.status() == RestStatus.CONFLICT) {
//引發的異常表示返回了版本沖突錯誤
}
}
Update API
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http"),
new HttpHost("localhost", 9201, "http")));
UpdateRequest request = new UpdateRequest (
"test",//索引
"_doc",//類型
"1");//文檔ID
//更新API允許通過使用腳本或傳遞部分文檔來更新現有文檔。
//使用腳本
//方式1:該腳本可以作為內聯腳本提供:
Map<String, Object> parameters = singletonMap("count", 4);//腳本參數
//使用painless語言和上面的參數創建一個內聯腳本
Script inline = new Script(ScriptType.INLINE, "painless", "ctx._source.field += params.count", parameters);
request.script(inline);
//方式2:引用名稱為increment-field的腳本,改腳本定義的位置還沒搞清楚。
Script stored =
new Script(ScriptType.STORED, null, "increment-field", parameters);
request.script(stored);
//只更新部分
//更新部分文檔時,更新的部分文檔將與現有文檔合並。
//方式1:使用字符串形式
UpdateRequest request1 = new UpdateRequest("posts", "doc", "1");
String jsonString = "{" +
"\"updated\":\"2017-01-01\"," +
"\"reason\":\"daily update\"" +
"}";
request1.doc(jsonString, XContentType.JSON);
//方式2:使用Map形式,會被自動轉為json格式
Map<String, Object> jsonMap = new HashMap<>();
jsonMap.put("updated", new Date());
jsonMap.put("reason", "daily update");
UpdateRequest request2 = new UpdateRequest("posts", "doc", "1")
.doc(jsonMap);
//方式3:使用XContentBuilder形式
XContentBuilder builder = XContentFactory.jsonBuilder();
builder.startObject();
{
builder.field("updated", new Date());
builder.field("reason", "daily update");
}
builder.endObject();
UpdateRequest request3 = new UpdateRequest("posts", "doc", "1")
.doc(builder);
//方式4:使用Object key-pairs形式
UpdateRequest request4 = new UpdateRequest("posts", "doc", "1")
.doc("updated", new Date(),
"reason", "daily update");
//如果文檔尚不存在,則可以使用upsert方法定義一些將作為新文檔插入的內容:
//與部分文檔更新類似,可以使用接受String,Map,XContentBuilder或Object key-pairs的方式來定義upsert文檔的內容。
String jsonString1 = "{\"created\":\"2017-01-01\"}";
request.upsert(jsonString1, XContentType.JSON);
//=========================可選參數===========================
request.routing("routing");//設置routing值
request.parent("parent");//設置parent值
//設置超時:等待主分片變得可用的時間
request.timeout(TimeValue.timeValueSeconds(1));//TimeValue方式
request.timeout("1s");//字符串方式
//刷新策略
request.setRefreshPolicy(WriteRequest.RefreshPolicy.WAIT_UNTIL);//WriteRequest.RefreshPolicy實例方式
request.setRefreshPolicy("wait_for");//字符串方式
//如果要更新的文檔在獲取或者索引階段已被另一操作更改,則重試更新操作的次數
request.retryOnConflict(3);
request.version(2);//設置版本
request.fetchSource(true); //啟用_source檢索,默認為禁用
//為特定字段配置_source_include
String[] includes = new String[]{"updated", "r*"};
String[] excludes = Strings.EMPTY_ARRAY;
request.fetchSource(new FetchSourceContext(true, includes, excludes));
//為指定字段配置_source_exclude
String[] includes1 = Strings.EMPTY_ARRAY;
String[] excludes1 = new String[]{"updated"};
request.fetchSource(new FetchSourceContext(true, includes1, excludes1));
request.detectNoop(false);//禁用noop檢測
//無論文檔是否存在,腳本都必須運行,即如果腳本尚不存在,則腳本負責創建文檔。
request.scriptedUpsert(true);
//如果不存在,則表明部分文檔必須用作upsert文檔。
request.docAsUpsert(true);
//設置在繼續更新操作之前必須激活的分片副本的數量。
request.waitForActiveShards(2);
//使用ActiveShardCount方式,可以是ActiveShardCount.ALL,ActiveShardCount.ONE或ActiveShardCount.DEFAULT(默認值)
request.waitForActiveShards(ActiveShardCount.ALL);
//同步執行
UpdateResponse updateResponse = client.update(request);
//異步執行
//DeleteResponse 的典型監聽器如下所示:
//異步方法不會阻塞並立即返回。
ActionListener<UpdateResponse > listener = new ActionListener<UpdateResponse >() {
@Override
public void onResponse(UpdateResponse updateResponse) {
//執行成功時調用。 Response以參數方式提供
}
@Override
public void onFailure(Exception e) {
//在失敗的情況下調用。 引發的異常以參數方式提供
}
};
//異步執行獲取索引請求需要將UpdateRequest 實例和ActionListener實例傳遞給異步方法:
client.updateAsync(request, listener);
//Update Response
//返回的UpdateResponse允許檢索有關執行操作的信息,如下所示:
String index = updateResponse.getIndex();
String type = updateResponse.getType();
String id = updateResponse.getId();
long version = updateResponse.getVersion();
if (updateResponse.getResult() == DocWriteResponse.Result.CREATED) {
//處理第一次創建文檔的情況(upsert)
} else if (updateResponse.getResult() == DocWriteResponse.Result.UPDATED) {
//處理文檔被更新的情況
} else if (updateResponse.getResult() == DocWriteResponse.Result.DELETED) {
//處理文檔已被刪除的情況
} else if (updateResponse.getResult() == DocWriteResponse.Result.NOOP) {
//處理文檔未受更新影響的情況,即文檔上未執行任何操作(noop)
}
//當通過fetchSource方法在UpdateRequest中啟用源檢索時,響應會包含已更新文檔:
GetResult result = updateResponse.getGetResult();//獲取已更新的文檔
if (result.isExists()) {
String sourceAsString = result.sourceAsString();//獲取已更新的文檔源(String方式)
Map<String, Object> sourceAsMap = result.sourceAsMap();//獲取已更新的文檔源(Map方式)
byte[] sourceAsBytes = result.source();//獲取已更新的文檔源(byte[]方式)
} else {
//處理不返回文檔源的場景(默認就是這種情況)
}
//也可以檢查分片失敗:
ReplicationResponse.ShardInfo shardInfo = updateResponse.getShardInfo();
if (shardInfo.getTotal() != shardInfo.getSuccessful()) {
//處理成功分片數量少於總分片數量的情況
}
if (shardInfo.getFailed() > 0) {
for (ReplicationResponse.ShardInfo.Failure failure : shardInfo.getFailures()) {
String reason = failure.reason();//處理潛在的失敗
}
}
//當針對文檔不存在時,響應404狀態碼,將引發ElasticsearchException,需要按如下方式處理:
UpdateRequest request5 = new UpdateRequest("posts", "type", "does_not_exist").doc("field", "value");
try {
UpdateResponse updateResponse5 = client.update(request);
} catch (ElasticsearchException e) {
if (e.status() == RestStatus.NOT_FOUND) {
//處理由於文檔不存在拋出的異常
}
}
//如果存在版本沖突,則會拋出ElasticsearchException:
UpdateRequest request6 = new UpdateRequest("posts", "doc", "1")
.doc("field", "value")
.version(1);
try {
UpdateResponse updateResponse6 = client.update(request);
} catch(ElasticsearchException e) {
if (e.status() == RestStatus.CONFLICT) {
//引發的異常表示返回了版本沖突錯誤
}
}