private void restoreClusterFromWAL() throws IOException {
ODiskWriteAheadLog log =
new ODiskWriteAheadLog(4, -1, 10 * 1024L * OWALPage.PAGE_SIZE, storage);
OLogSequenceNumber lsn = log.begin();
List<OWALRecord> atomicUnit = new ArrayList<OWALRecord>();
boolean atomicChangeIsProcessed = false;
while (lsn != null) {
OWALRecord walRecord = log.read(lsn);
atomicUnit.add(walRecord);
if (!atomicChangeIsProcessed) {
Assert.assertTrue(walRecord instanceof OAtomicUnitStartRecord);
atomicChangeIsProcessed = true;
} else if (walRecord instanceof OAtomicUnitEndRecord) {
atomicChangeIsProcessed = false;
for (OWALRecord restoreRecord : atomicUnit) {
if (restoreRecord instanceof OAtomicUnitStartRecord
|| restoreRecord instanceof OAtomicUnitEndRecord
|| restoreRecord instanceof OFileCreatedWALRecord
|| restoreRecord instanceof ONonTxOperationPerformedWALRecord) continue;
final OUpdatePageRecord updatePageRecord = (OUpdatePageRecord) restoreRecord;
final long fileId = updatePageRecord.getFileId();
final long pageIndex = updatePageRecord.getPageIndex();
if (!testWriteCache.isOpen(fileId)) testReadCache.openFile(fileId, testWriteCache);
OCacheEntry cacheEntry = testReadCache.load(fileId, pageIndex, true, testWriteCache);
if (cacheEntry == null) {
do {
if (cacheEntry != null) readCache.release(cacheEntry, testWriteCache);
cacheEntry = testReadCache.allocateNewPage(fileId, testWriteCache);
} while (cacheEntry.getPageIndex() != pageIndex);
}
cacheEntry.acquireExclusiveLock();
try {
ODurablePage durablePage = new ODurablePage(cacheEntry, null);
durablePage.restoreChanges(updatePageRecord.getChanges());
durablePage.setLsn(updatePageRecord.getLsn());
cacheEntry.markDirty();
} finally {
cacheEntry.releaseExclusiveLock();
testReadCache.release(cacheEntry, testWriteCache);
}
}
atomicUnit.clear();
} else {
Assert.assertTrue(
walRecord instanceof OUpdatePageRecord
|| walRecord instanceof OFileCreatedWALRecord
|| walRecord instanceof ONonTxOperationPerformedWALRecord);
}
lsn = log.next(lsn);
}
Assert.assertTrue(atomicUnit.isEmpty());
log.close();
}
@Override
public OCacheEntry loadPage(
long fileId, long pageIndex, boolean checkPinnedPages, OWriteCache writeCache, int pageCount)
throws IOException {
return readCache.load(fileId, pageIndex, checkPinnedPages, writeCache, pageCount);
}