IndexReaderPtr Index::acquireReader(bool bRefresh)
{
if ((m_accessMode != READ) && (m_accessMode != RDWR))
{
FX_LOG(INFO, _T("The access mode is WRITE or APPEND, "
"can't aquire reader of the index"));
return IndexReaderPtr();
}
if (bRefresh)
{
CommitList commits;
commits.load(m_pFileSys);
commitid_t lastCommit = commits.getLastCommit();
commitid_t curCommit = m_pReader->getBarrelsInfo()->getCommitId();
if (lastCommit > curCommit)
{
m_pIndexBarrelKeeper->refresh();
IndexReaderPtr pNewReader(m_pReader->clone());
pNewReader->reopen();
ScopedRWLock lock(m_lock, true);
m_pReader = pNewReader;
pNewReader.reset();
if (m_pIndexBarrelKeeper->getHeldCommitCount() >= 2)
{
m_pIndexBarrelKeeper->housekeep();
}
return m_pReader;
}
if (lastCommit < curCommit)
{
FIRTEX_THROW(IndexCollapseException, "Invalid commit id: "
"current commit: [%d], last comit: [%d]",
curCommit, lastCommit);
}
}
ScopedRWLock lock(m_lock, false);
return m_pReader;
}
IndexReaderPtr IndexReader::reopen() {
SyncLock syncLock(this);
boost::throw_exception(UnsupportedOperationException(L"This reader does not support reopen()."));
return IndexReaderPtr();
}
