com.atlassian.jira.issue.index
Class IndexConsistencyUtils

java.lang.Object
  com.atlassian.jira.issue.index.IndexConsistencyUtils

public class IndexConsistencyUtils
extends Object

Utility methods related to performing consistency checks on indexes.

Since:

v5.2

Method Summary

static boolean

isIndexConsistent(String name, int expectedCount, Supplier<org.apache.lucene.search.IndexSearcher> supplier) Performs a simple consistency check on an index by opening it, comparing the document count to an expected value supplied by the caller, and closing it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isIndexConsistent

public static boolean isIndexConsistent(String name,
                                        int expectedCount,
                                        Supplier<org.apache.lucene.search.IndexSearcher> supplier)

Performs a simple consistency check on an index by opening it, comparing the document count to an expected value supplied by the caller, and closing it. If the expected document count can not be determined reliably and efficiently, then -1 may be specified to skip that part of the check. If an expected count is given, the actual count must be within 10% of the expected value or 10 documents, whichever value is larger.

Parameters:

name - a name to identify the index

expectedCount - the expected count of documents in the index, or -1 to skip this check

supplier - provides a searcher for the index; should throw an exception if the index is unavailable

Returns:

true if the index is present and contains reasonably close to the expected number of documents; false if any exception is thrown or if the index document count is excessively different from the expected count