如何在ElasticSearch中找到索引的别名

Question

我想找出ElasticSearch中给定索引的别名。基本上，这个问题的反面：How to find Index by Alias in Elasticsearch java api?

Answer 1

这就是我做到的。

// Get the map of [alias => [index => metadata, ...], ...] 
ImmutableOpenMap<String, ImmutableOpenMap<String, AliasMetaData>> aliasesAndIndices = 
     client.admin().cluster() 
     .prepareState().execute().actionGet().getState() 
     .getMetaData().getAliases(); 
Map<String, String> aliasForIndex = new HashMap<>(); 

// Convert it to a map of [index => alias, ...] 
for (String alias : aliasesAndIndices.keys().toArray(String.class)) { 
    ImmutableOpenMap<String, AliasMetaData> innerMap = aliasesAndIndices.get(alias); 
    for (String index : innerMap.keys().toArray(String.class)) { 
     aliasForIndex.put(index, alias); 
    } 
} 

然后我可以得到像这样的索引的别名。

aliasForIndex.get(index)