Java High Level REST Client 的聚合写法

TermsAggregationBuilder categoryAggregationBuilder =

        AggregationBuilders.terms("byCategory").field("information_type");

TermsAggregationBuilder sourceAggregationBuilder =

        AggregationBuilders.terms("bySource").field("source");

searchSourceBuilder.aggregation(categoryAggregationBuilder).aggregation(sourceAggregationBuilder);