Hands-On Software Engineering with Golang

Iterating the list of search results

The bleveIterator type implements the indexer.Iterator interface and is defined as follows:

type bleveIterator struct {
    idx       *InMemoryBleveIndexer
    searchReq *bleve.SearchRequest

    cumIdx uint64
    rsIdx  int
    rs     *bleve.SearchResult

    latchedDoc *index.Document
    lastErr    error
}

The iterator implementation keeps track of two pointers:

• A pointer to the in-memory indexer instance, which allows the iterator to access the stored documents when the iterator is advanced
• A pointer to the executed search request, which the iterator uses to trigger new bleve searches once the current page of results has been consumed

To track the position in the paginated search result list, the iterator also maintains two counters:

• A cumulative ...