Re: Index Write Access

[Simone Busoli]

As far as I can tell from the docs you should open a reader, delete all the documents you need to delete and close the reader. The open a writer, add all the documents you need to add and close it. I wouldn't wrap them into other classes since you loose granularity on what you really want to happen. In the project I am developing using Lucene.Net I'm doing something like the following into a method which gets called on a regular basis into a singleton class, to ensure that this instance is the only responsible for creating writers which lock the index: public void UpdateIndex() {             [...]             // Create new IndexReader to update the index             indexReader = IndexReader.Open(indexDirectory);             // Here remove files from the index using the indexReader instance             // Close the IndexReader             indexReader.Close();             indexReader = null;             // Create a new IndexWriter to add new documents to the index             indexWriter = new IndexWriter(indexDirectory, new StandardAnalyzer(), false);             // Here add documents to the index using the indexWriter instance             // Close the IndexWriter             indexWriter.Optimize();             indexWriter.Close();             indexWriter = null; } Simone Patrick Burrows wrote: Assuming I have assured that only one thread from one process is calling the below methods, is there any issue with calling DeletePost(post.Id); AddPostToIndex(post); in terms of potentially corrupting the index? I can't see any. But I've suddenly got paranoid about index corruption. IndexModifierSingleton is just that, a singleton for the IndexModifier. The IndexReader is not, since I wanted a fresh reader for each delete operation.        private static void DeletePost(int feedItemId)        {            IndexReader ir = IndexReader.Open(IndexPath());            ir.DeleteDocuments(new Term(Post.FIELD_FEEDITEMID, feedItemId.ToString()));            ir.Close();        }        public static string IndexPath()        {            return Settings.Default.IndexPath;        }        public static void AddPostToIndex(Post post)        {            IndexModifierSingleton.instance.AddDocument(post.ToDocument());        }