创建索引 Create 同步请求
先创建 一个常量类
public class Constant {
public static final String ES_LIU_DOCUMENT_INDEX = "liu_document"; //索引库名称
}
//创建索引 Request
@Test
public void testCreateIndex() throws IOException {
// 1、创建索引请求
CreateIndexRequest request = new CreateIndexRequest(ES_LIU_DOCUMENT_INDEX);
//2、执行创建请求
CreateIndexResponse createIndexResponse = restHighLevelClient.indices()
.create(request, RequestOptions.DEFAULT);
}
创建索引 Create 异步请求
// 异步->创建索引 Request
@Test
public void testSynCreateIndexMapping() {
try {
// 1、创建索引请求
CreateIndexRequest request = new CreateIndexRequest(Constant.ES_LIU_DOCUMENT_INDEX);
//2、执行创建异步请求
restHighLevelClient.indices().createAsync(request,RequestOptions.DEFAULT,elasticSearchSynListener.createIndexListener(Constant.ES_LIU_DOCUMENT_INDEX));
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
重点讲一下 为什么写Thread.sleep(1000)
先看个问题,这是elasticsearch社区提出的一个问题,为什么异步创建索引的时候会报 Connection closed unexpectedly 同步则没有问题。
这种原因是因为 当异步发生时, 索引创建是否成功还未返回 就已经 断开了client连接(结束当前进程),这时候需要等待一小会,或者直接springboot启动则不会断开连接,如果进行单元测试则需要创建Thread.sleep 或者使用其他延迟进程结束的方法!
查看索引是否存在 GetIndexRequest
//检查索引 是否存在
@Test
public void testExistsIndex() throws IOException {
GetIndexRequest request = new GetIndexRequest(Constant.ES_LIU_DOCUMENT_INDEX);
boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
System.out.println(exists);
}
返回true代表存在!
同步添加文档 GetIndexRequest
//添加文档
@Test
public void testAddDocument() throws IOException {
//创建对象
User user = new User("小1", 1);
//创建请求
IndexRequest request = new IndexRequest(Constant.ES_LIU_DOCUMENT_INDEX);
//规则 put /kuang_index/_doc/1
request.id("1"); //文档id
request.timeout(TimeValue.timeValueSeconds(1));//时间 1s
//将我们的数据放入请求 json
request.source(JSON.toJSONString(user), XContentType.JSON);
//客户端发送请求 , 获取响应的结果
IndexResponse indexResponse = restHighLevelClient.index(request, RequestOptions.DEFAULT);
System.out.println(indexResponse.toString()); //返回文档信息
System.out.println(indexResponse.status()); //操作文档类型
}
异步创建文档 IndexRequest
// 异步-> 创建文档数据
@Test
public void testSynAddDocument(){
try {
String id = "2";
//1.实例化索引请求 后面链式写法 追加文档数据
User user = new User("小2", 2);
IndexRequest indexRequest = new IndexRequest(Constant.ES_LIU_DOCUMENT_INDEX).id(id)
//将我们的数据放入请求 json
.source(JSON.toJSONString(user), XContentType.JSON);
//等待主分片的时间,这里超过1秒代表超时 若超时则使用副分片
indexRequest.timeout(TimeValue.timeValueSeconds(1));
restHighLevelClient.indexAsync(indexRequest,RequestOptions.DEFAULT,elasticSearchSynListener.createDocumentListener(id));
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
去Kinbana查看刚才新增的两个文档!
删除索引
// 删除索引
@Test
public void testDeleteIndex() throws IOException {
DeleteIndexRequest request = new DeleteIndexRequest("liuy_doc");
AcknowledgedResponse delete = restHighLevelClient.indices()
.delete(request, RequestOptions.DEFAULT);
System.out.println(delete.isAcknowledged());
}
查看文档是否存在
//判断文档是否存在
@Test
public void testExistsDocument() throws IOException {
GetRequest getRequest = new GetRequest("liuy_doc", "1");
//不获取返回的 _source 的上下文了(只获取文档状态等 不获取具体内容)
getRequest.fetchSourceContext(new FetchSourceContext(false));
getRequest.storedFields("_none_");
boolean exists = restHighLevelClient.exists(getRequest, RequestOptions.DEFAULT);
System.out.println(exists);
}
获取文档信息
@Test
public void testGetDocument() throws IOException {
GetRequest getRequest = new GetRequest("liuy_doc", "1");
GetResponse documentFields = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);
System.out.println(documentFields.getSourceAsString()); //打印文档内容
System.out.println(documentFields);
}
批量新增文档
//批量新增文档
@Test
public void testBatchAddDocument() throws IOException {
List<User> list = new ArrayList<>();
for (int i = 0; i < 1000; i++) {
list.add(new User("a1" + i + 2, i));
}
List<User> list2 = Collections.synchronizedList(new ArrayList<User>());
BulkRequest bulkRequest = new BulkRequest("liuy_doc");
bulkRequest.timeout("5s");
// list.parallelStream().forEach(u-> System.out.println(u));
list.parallelStream().forEach(list2::add);
list2.stream().forEach(u -> System.out.println(u));
//
BulkResponse bulkResponse = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
// System.out.println(bulkResponse.hasFailures());
}
查询 这里只写一种 不过有注释写的其他种类,后续有时间再写详细点
/** 查询
* SearchRequest 搜索请求
* SearchSourceBuilder 条件构造
* HighlightBuilder 构建高亮
* TermQueryBuilder 精确查询
* MatchAllQueryBuilder
* xxx QueryBuilder 对应我们之前操作kibana看到的命令!
*/
@Test
public void testSearch() {
SearchRequest searchRequest = new SearchRequest("liuy_doc");
// 构建搜索条件
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.highlighter();
// 查询条件,我们可以使用 QueryBuilders 工具来实现
// QueryBuilders.termQuery 精确
// QueryBuilders.matchAllQuery() 匹配所有
MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("name",
"刘洋牛逼");
QueryBuilders.matchAllQuery();
sourceBuilder.query(matchQueryBuilder);
sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
searchRequest.source(sourceBuilder);
SearchResult result = elasticSearchHelper.searchDocument(searchRequest);
System.out.println(result);
List<Map<String, Object>> list = result.getDocuments();
list.forEach(m -> {
System.out.println(m.get("name") + "," + m.get("age"));
});
}
上面的所有代码我都上传了Github 有兴趣可以看一下!
源码地址:https://github.com/ly147369/springboot_elasticsearch_api