Elasticsearch Java API （二）： index建立刪除 cluster管理

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Elasticsearch Java API （二）： index建立刪除 cluster管理 

elastic官網有權威的java api 英文的 需要耐心看 這裡整理下基本操作

建立maven工程添加依賴

        <dependency>            <groupId>org.elasticsearch.client</groupId>            <artifactId>transport</artifactId>            <version>5.2.2</version>        </dependency>        <dependency>            <groupId>net.sf.json-lib</groupId>            <artifactId>json-lib</artifactId>            <version>2.4</version>        </dependency>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-api</artifactId>            <version>2.7</version>        </dependency>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-core</artifactId>            <version>2.7</version>        </dependency>        <dependency>            <groupId>org.locationtech.spatial4j</groupId>            <artifactId>spatial4j</artifactId>            <version>0.6</version>        </dependency>        <dependency>            <groupId>com.vividsolutions</groupId>            <artifactId>jts</artifactId>            <version>1.13</version>            <exclusions>                <exclusion>                    <groupId>xerces</groupId>                    <artifactId>xercesImpl</artifactId>                </exclusion>            </exclusions>        </dependency>        <dependency>            <groupId>org.elasticsearch.plugin</groupId>            <artifactId>delete-by-query</artifactId>            <version>2.4.1</version>        </dependency>

 

 

首先自訂一個client用於串連es

/** * Created by forgeeks at 2017-03-22 18:27 */public class MyClient {    private Settings settings;    private TransportClient client;    private IndexResponse response;    public IndexResponse getResponse() {        return response;    }    public void setResponse(IndexResponse response) {        this.response = response;    }    public TransportClient getClient() {        return client;    }    public MyClient(String clusterName, String inetAddress, Integer port) throws UnknownHostException {        settings = Settings.builder().put("cluster.name", clusterName).build();        client = new PreBuiltTransportClient(settings).addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(inetAddress), port));    }    public void close(){        getClient().close();    }}

 串連方法很簡單，照著官方的抄就可以了

接下來看看串連的cluster狀態

    /**     * 列印叢集健康狀態     *     * @param client     */    public static void printClustesInfo(MyClient client) {        ClusterHealthResponse healths = client.getClient().admin().cluster().prepareHealth().get();        Map<String, ClusterIndexHealth> map = healths.getIndices();        String clusterName = healths.getClusterName();        int numberOfDataNodes = healths.getNumberOfDataNodes();        int numberOfNodes = healths.getNumberOfNodes();        System.out.println("叢集名稱： " + clusterName + "     資料節點數：" + numberOfDataNodes + "   得到節點數:" + numberOfNodes + "  索引數：" + map.size());        for (String key : map.keySet()) {            System.out.print(key + "  ");        }           }

 

再看下怎麼建立index，首先要明白像資料庫一樣，如果已存在還建立就會拋異常，所以先檢查

    /**判斷index是否存在     *     * @param client     * @param index     * @return     */    public static boolean indexExists(MyClient client, String index) {        IndicesExistsRequest request = new IndicesExistsRequest(index);        IndicesExistsResponse response = client.getClient().admin().indices().exists(request).actionGet();        if (response.isExists()) return true;        else return false;    }    /**     * 建立索引和類型     *     * @param client     * @param index     * @param type     * @throws IOException     */    public static void createIndex(MyClient client, String index, String type) throws IOException {        if (indexExists(client, index)) {            System.out.println("index 已存在");            return;        }        IndexResponse response = client.getClient().prepareIndex(index, type)                .setSource(jsonBuilder().startObject().endObject()).get();        client.setResponse(response);        System.out.print(response.toString() + "索引成功建立");    }

建立成功console會有資訊

或者敲命令列 要注意的是win和linux下curl 不一定能用 只有安裝了才能用 win下的即使能用也不要用 不是針對 建個虛擬機器 按（一）的方法再跑一台es 叢集設定下 後面再說

叢集 再用xshell連 可以直接用linux下的curl 然後會徹底解放

[[email protected] config]# curl -XGET  132.126.3.180:9200/_cat/indices?v

 

好了，接下來是（三）搜尋

 

Elasticsearch Java API （二）： index建立刪除 cluster管理