ElasticSearch Java API：创建客户端

Question

我们是否必须为每个操作创建一个Client对象，或者在应用程序的生命周期中为所有操作使用唯一对象？

Answer 1

您可以实例化一个TransportClient像documentation解释说：

TransportClient client = new PreBuiltTransportClient(Settings.EMPTY) 
     .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host1"), 9300)) 
     .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host2"), 9300)); 

该客户端实例继承了AbstractClient所有方法：

admin, bulk, bulk, clearScroll, clearScroll, count, count, delete, 
delete, deleteIndexedScript, deleteIndexedScript, execute, execute, exists, 
exists, explain, explain, fieldStats, fieldStats, get, get, 
getIndexedScript, getIndexedScript, headers, index, index, multiGet, multiGet, multiPercolate, multiPercolate, multiSearch, multiSearch, 
multiTermVectors, multiTermVectors, percolate, percolate, prepareBulk, 
prepareClearScroll, prepareCount, prepareDelete, prepareDelete, 
prepareDeleteIndexedScript, prepareDeleteIndexedScript, prepareExecute, 
prepareExists, prepareExplain, prepareFieldStats, prepareGet, 
prepareGet, prepareGetIndexedScript, prepareGetIndexedScript, 
prepareIndex, prepareIndex, prepareIndex, prepareMultiGet, 
prepareMultiPercolate, prepareMultiSearch, prepareMultiTermVectors, 
preparePercolate, preparePutIndexedScript, preparePutIndexedScript, 
prepareSearch, prepareSearchScroll, prepareSuggest, prepareTermVector, 
prepareTermVector, prepareTermVectors, prepareTermVectors, 
prepareUpdate, prepareUpdate, putIndexedScript, putIndexedScript, 
search, search, searchScroll, searchScroll, settings, suggest, suggest, 
termVector, termVector, termVectors, termVectors, threadPool, update, 
update 

因此，要回答你的问题;您可以多次重复使用同一个客户端对象。