这里主要是和别名相关的操作

为一个已经创建好的索引增加别名

 private static  void addAlias(RestHighLevelClient client,String indexName,String aliasName){
        IndicesAliasesRequest indicesAliasesRequest = new IndicesAliasesRequest();
        IndicesAliasesRequest.AliasActions aliasActions = new IndicesAliasesRequest.AliasActions(IndicesAliasesRequest.AliasActions.Type.ADD);
        aliasActions.index(indexName).alias(aliasName);
        indicesAliasesRequest.addAliasAction(aliasActions);
        try {
            client.indices().updateAliases(indicesAliasesRequest,RequestOptions.DEFAULT);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                //关闭 client
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

增加一个带过滤条件的别名

以后用这个别名查询时，会自动获取所有符合条件的文档

private static  void addAlias2(RestHighLevelClient client,String indexName,String aliasName){
        IndicesAliasesRequest indicesAliasesRequest = new IndicesAliasesRequest();
        IndicesAliasesRequest.AliasActions aliasActions = new IndicesAliasesRequest.AliasActions(IndicesAliasesRequest.AliasActions.Type.ADD);
        aliasActions.index(indexName).alias(aliasName).filter("{\"term\": {\"name\": \"java\"}}");
        indicesAliasesRequest.addAliasAction(aliasActions);
        try {
            client.indices().updateAliases(indicesAliasesRequest,RequestOptions.DEFAULT);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                //关闭 client
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

删除一个索引的别名

private static  void deleteAlias(RestHighLevelClient client,String indexName,String aliasName){
        IndicesAliasesRequest indicesAliasesRequest = new IndicesAliasesRequest();
        IndicesAliasesRequest.AliasActions aliasActions = new IndicesAliasesRequest.AliasActions(
                IndicesAliasesRequest.AliasActions.Type.REMOVE);
       aliasActions.index(indexName).alias(aliasName);

        indicesAliasesRequest.addAliasAction(aliasActions);
        try {
            client.indices().updateAliases(indicesAliasesRequest,RequestOptions.DEFAULT);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                //关闭 client
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

删除一个索引的别名的第二种写法

    private static  void deleteAlias2(RestHighLevelClient client,String indexName,String aliasName){

        DeleteAliasRequest deleteAliasRequest = new DeleteAliasRequest(indexName,aliasName);
        try {
            client.indices().deleteAlias(deleteAliasRequest,RequestOptions.DEFAULT);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                //关闭 client
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

判断别名是否存在

    private  static  void getAliasExist(RestHighLevelClient client,String indexName,String aliaName){
        GetAliasesRequest getAliasesRequest = new GetAliasesRequest(aliaName);
        // 指定查看某一个索引的别名 不指定，则会搜索所有的别名
        getAliasesRequest.indices(indexName);
        try {
            boolean b = client.indices().existsAlias(getAliasesRequest, RequestOptions.DEFAULT);
            System.out.println("exists: "+ b );
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                //关闭 client
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

获取别名

private static  void getAlias(RestHighLevelClient client,String indexName,String aliaName){
        GetAliasesRequest getAliasesRequest = new GetAliasesRequest(aliaName);
        // 指定查看某一个索引的别名 不指定，则会搜索所有的别名
        getAliasesRequest.indices(indexName);
        try {
            GetAliasesResponse response = client.indices().getAlias(getAliasesRequest,RequestOptions.DEFAULT);
            Map<String, Set<AliasMetadata>> aliases = response.getAliases();
            System.out.println("aliases: "+aliases);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                //关闭 client
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }