question: public void test_canonicalizingCache ( ) { final Properties properties = getProperties ( ) ; properties . setProperty ( AbstractTransactionService . Options . MIN_RELEASE_AGE , "5000" ) ; final Journal journal = new Journal ( properties ) ; try { final long commitTime0 = journal . commit ( ) ; assertTrue ( commitTime0 != 0L ) ; final ICommitRecord commitRecord0 = journal . getCommitRecord ( commitTime0 ) ; assertEquals ( commitRecord0 , journal . getCommitRecord ( ) ) ; journal . write ( ByteBuffer . wrap ( new byte [ ] { 1 , 2 , 3 } ) ) ; final long commitTime1 = journal . commit ( ) ; assertTrue ( commitTime1 != 0L ) ; final ICommitRecord commitRecord1 = journal . getCommitRecord ( commitTime1 ) ; assertEquals ( commitRecord1 , journal . getCommitRecord ( ) ) ; assertTrue ( commitRecord0 == journal . getCommitRecord ( commitTime1 - 1 ) ) ; assertTrue ( commitRecord1 == journal . getCommitRecord ( commitTime1 + 0 ) ) ; assertTrue ( commitRecord1 == journal . getCommitRecord ( commitTime1 + 1 ) ) ; } finally { journal . destroy ( ) ; } }
target:  Test verifies that exact match and find always return the same reference for the same commit record (at least as long as the test holds a hard reference to the commit record of interest).