用Java实现Elasticsearch中的查询更新

Question

POST /twitter/_update_by_query
{
  "script": {
    "inline": "ctx._source.List = [‘Item 1’,’Item 2’]”
  },
  "query": {
    "term": {
      "user": "kimchy"
    }
  }
}

Client client = TransportClient.builder().addPlugin(ReindexPlugin.class)
    .build().addTransportAddress(new InetSocketTransportAddress(
        InetAddress.getByName("127.0.0.1"), 9300));

UpdateByQueryRequestBuilder ubqrb = UpdateByQueryAction.INSTANCE
    .newRequestBuilder(client);

Script script = new Script("ctx._source.List = [\"Item 1\",\"Item 2\"]");

//termQuery is not recognised by the program
BulkIndexByScrollResponse r = ubqrb.source("twitter").script(script)
    .filter(termQuery("user", "kimchy")).execute().get();

因此，我像上面那样编辑了Java程序，而termQuery不是由Java标识的。我能知道我在这里做错了什么吗？谢了。

Answer 1

从ES 2.3开始，update by query特性可作为RESTendpoint_update_by_query使用，但不适用于Java客户机。为了从Java客户机代码调用这个endpoint，需要在pom.xml中包含reindex模块，如下所示

<dependency>
    <groupId>org.elasticsearch.module</groupId>
    <artifactId>reindex</artifactId>
    <version>2.3.2</version>
</dependency>

然后您需要在构建客户端时包含此模块：

clientBuilder.addPlugin(ReindexPlugin.class);

最后，您可以这样称呼它：

UpdateByQueryRequestBuilder ubqrb = UpdateByQueryAction.INSTANCE.newRequestBuilder(client);

Script script = new Script("ctx._source.List = [\"Item 1\",\"Item 2\"]");

BulkIndexByScrollResponse r = ubqrb.source("twitter")
    .script(script)
    .filter(termQuery("user", "kimchy"))
    .get();

ubqrb.source("twitter").source().setTypes("type1");
BulkIndexByScrollResponse r = ubqrb.script(script)
    .filter(termQuery("user", "kimchy"))
    .get();