ElasticSearch JAVA创建client

JavaES客户端配置与初始化

最新推荐文章于 2025-10-25 22:41:22 发布

原创最新推荐文章于 2025-10-25 22:41:22 发布 · 347 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java #elasticsearch #开发语言

ElasticSearch 专栏收录该内容

4 篇文章

订阅专栏

该代码段展示了如何初始化一个JavaElasticsearch客户端，包括设置默认的RequestOptions，处理ES的用户名和密码，以及调整连接和套接字超时时间。同时，它还创建了RestHighLevelClient实例，并配置了HTTP头和IO线程数。

    public static  String DEFAULT_INDEX = "archser";
    private  String scheme;
    private  int port;
    private  String host;
    public  String INDEX = DEFAULT_INDEX;
    public static final String TYPE = "_doc";
    static final String TEMPLATE_TEMPLATE_MAP_KEY = "_TEMPLATE_TEMPLATE_MAP_";
    public static RequestOptions DEFAULT_OPTIONS;
    private String name;
    private static RestClientBuilder clientBuilder = null;
    private static RestHighLevelClient restHighLevelClient = null;

    /**
     * 初始化RequestOptions,如果设置了es登陆用户密码将用户信息写入header
     */
    static {
        RequestOptions.Builder builder = RequestOptions.DEFAULT.toBuilder();
        String user = PropKit.get("es.user", "");
        String password = PropKit.get("es.password", "");
        String scheme = PropKit.get("es.http", "http");
        Integer port = PropKit.getInt("es.port",9200);
        String host = PropKit.get("es.host");

        if ("".equals(user) || "".equals(password)) {
            DEFAULT_OPTIONS = RequestOptions.DEFAULT;
        } else {
            builder.addHeader("Authorization",
                    "Basic " + Base64.getUrlEncoder().encodeToString((user + ":" + password).getBytes()));
            RequestOptions ops = builder.build();
            DEFAULT_OPTIONS = ops;
        }

        clientBuilder = RestClient.builder(new HttpHost(host, port, scheme))
                .setRequestConfigCallback(new RestClientBuilder.RequestConfigCallback() {
                    // 该方法接收一个RequestConfig.Builder对象，对该对象进行修改后然后返回。
                    @Override
                    public RequestConfig.Builder customizeRequestConfig(
                            RequestConfig.Builder requestConfigBuilder) {
                        return requestConfigBuilder.setConnectTimeout(5000 * 1000) // 连接超时（默认为1秒）
                                .setSocketTimeout(6000 * 1000);// 套接字超时（默认为30秒）//更改客户端的超时限制默认30秒现在改为100*1000分钟
                    }
                }).setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                    @Override
                    public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                        // TODO Auto-generated method stub
                        return httpClientBuilder.setDefaultIOReactorConfig(
                                IOReactorConfig.custom()
                                        .setIoThreadCount(1)
                                        .build());
                    }
                });;
        // 将es用户信息写入请求头
        Header[] defaultHeaders = new Header[] {new BasicHeader("Authorization",
                "Basic " + Base64.getUrlEncoder().encodeToString((user + ":" + password).getBytes()))};
        clientBuilder.setDefaultHeaders(defaultHeaders);
        restHighLevelClient = new RestHighLevelClient(clientBuilder);

    }