帶有AWS ElasticSearch的Java RestHighLevelClient

Question

我想知道這里是否有人使用RestHighLevelClient連接到AWS ElasticSearch。 不確定這是否是AWS ElasticSearch支持的東西。每次嘗試連接時，我當前都會收到ConnectionClosedException。

這是我所擁有的：

public SearchResponse getQuery(){
    RestHighLevelClient client = new RestHighLevelClient(
            RestClient.builder(new HttpHost("localhost", 4430, "http")));
    SearchRequest searchRequest = new SearchRequest("msglog-dev-2018.05.21");
    SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
    searchSourceBuilder.query(QueryBuilders.matchAllQuery());
    searchRequest.source(searchSourceBuilder);
    SearchResponse searchResponse = null;
    try{
        searchResponse =client.search(searchRequest);
    }catch(IOException e){
        e.printStackTrace();
    }
    return searchResponse;
}

我得到的錯誤是

org.apache.http.ConnectionClosedException: Connection closed
at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.endOfInput(HttpAsyncRequestExecutor.java:347)
at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:261)
at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81)
at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39)                                                             
                                                                   ...........

Answer 1

是的，我們將RHLC與AWS一起使用。 這是一個示例，可以幫助您朝正確的方向前進。 這說明了一個直接調用（可能與更多讀者有關）–但可以通過調整連接參數（主機，端口，協議）的設置輕松地適應您的隧道需求。

private static final String HOST = "your-es-endpoint.es.amazonaws.com";
private static final int PORT = 443;
private static final String PROTOCOL = "https";

private static final RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost(HOST, PORT, PROTOCOL)));

public static void getESDocs() {
    try {
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery());   // adjust search logic here
        SearchRequest searchRequest = new SearchRequest("your-index-here");
        searchRequest.source(sourceBuilder);
        final SearchResponse searchResponse = client.search(searchRequest);

        /* process results here... */

        }
    } catch (Exception e) {
         /* handle connection/proc error here */
    } finally {
         client.close();    // example to release driver resource (see doc link)
    }
}

本示例對6.3.x版（YMMV）有效： API文檔