Structure index state propagation

Understand how states are propagated when the structures are indexed. This is the actual state propagation that occurs when processing indexes. Not all of these states are necessarily seen in the indexer as many are expected to be transitioned during backend server processing. Following is a complete set of state propagations for various types of sync processing: sync (initial) 0 - ReadyToIndex 1 – IndexGenStarted (On failure, processing goes to 3 – IndexGenFailure and then stops.) 2 – IndexGenSuccess 4 – IndexExportStarted (On failure, processing goes to 6 – IndexExportFailure and then stops.) 5 – IndexExportSuccess 7 – SolrIndexGenStarted (On failure, processing goes to 9 – SolrIndexGenFailure and then stops.) 8 – SolrIndexGenSuccess (Processing then stops.) sync (update) 8 – SolrIndexGenSuccess 17 - IndexGenSyncStarted (This is a transitional state set by the processBOMIndex SOA operation.) 4 – IndexExportStarted (On failure, processing goes to 6 – IndexExportFailure and then stops.) 5 – IndexExportSuccess 7 – SolrIndexGenStarted (On failure, processing goes to 9 – SolrIndexGenFailure and then stops.) 8 – SolrIndexGenSuccess (Processing then stops.) sync (delete) 10 - MarkedForDeletion 11 – IndexDelStarted (On failure, processing goes to 13 – IndexDelFailure and then stops.) 12 – IndexDelSuccess 14 – SolrIndexDelStarted (On failure, processing goes to 16 – SolrIndexDelFailure and then stops.) 15 – SolrIndexDelSuccess (The entry is deleted.)