@Test
public void open_ignores_rollback() {
File f = TT.tempDbFile();
WriteAheadLog wal = new WriteAheadLog(f.getPath());
wal.walPutLong(1L, 11L);
wal.commit();
wal.walPutLong(2L, 33L);
wal.rollback();
wal.walPutLong(3L, 33L);
wal.commit();
wal.seal();
wal.close();
wal = new WriteAheadLog(f.getPath());
wal.open(
new WALSequence(
new Object[] {WALSequence.beforeReplayStart},
new Object[] {WALSequence.writeLong, 1L, 11L},
new Object[] {WALSequence.commit},
// 2L is ignored, rollback section is skipped on hard replay
new Object[] {WALSequence.writeLong, 3L, 33L},
new Object[] {WALSequence.commit}));
wal.destroyWalFiles();
wal.close();
f.delete();
}
@Test
public void skip_rollback_last_rollback() {
WriteAheadLog wal = new WriteAheadLog(null);
wal.walPutLong(1L, 11L);
wal.commit();
long o1 = wal.fileOffset;
wal.walPutLong(2L, 33L);
wal.commit();
long o2 = wal.fileOffset;
wal.walPutLong(3L, 33L);
wal.rollback();
wal.seal();
assertEquals(o1, wal.skipRollbacks(o1));
assertEquals(0, wal.skipRollbacks(o2));
}
@Test
public void rollback() {
WriteAheadLog wal = new WriteAheadLog(null);
wal.open(WriteAheadLog.NOREPLAY);
wal.startNextFile();
wal.walPutLong(111L, 1000);
wal.rollback();
wal.seal();
wal.replayWAL(
new WALSequence(
new Object[] {WALSequence.beforeReplayStart},
new Object[] {WALSequence.writeLong, 111L, 1000L},
new Object[] {WALSequence.rollback}));
}
@Test
public void cut_broken_end_rollback() {
String f = TT.tempDbFile().getPath();
WriteAheadLog wal = new WriteAheadLog(f);
wal.walPutLong(1L, 11L);
wal.commit();
wal.walPutLong(2L, 22L);
wal.commit();
wal.walPutLong(3L, 33L);
wal.rollback();
wal.walPutLong(4L, 44L);
wal.curVol.sync();
wal.close();
wal = new WriteAheadLog(f);
wal.open(
new WALSequence(
new Object[] {WALSequence.beforeReplayStart},
new Object[] {WALSequence.writeLong, 1L, 11L},
new Object[] {WALSequence.commit},
new Object[] {WALSequence.writeLong, 2L, 22L},
new Object[] {WALSequence.commit}));
}
@Override
public void rollback() throws UnsupportedOperationException {
commitLock.lock();
try {
// flush modified records
for (int segment = 0; segment < locks.length; segment++) {
Lock lock = locks[segment].writeLock();
lock.lock();
try {
writeCache[segment].clear();
if (caches != null) {
caches[segment].clear();
}
uncommittedDataLongs[segment].clear();
uncommittedIndexTable[segment].clear();
} finally {
lock.unlock();
}
}
structuralLock.lock();
try {
uncommittedStackPages.clear();
// restore headVol from backup
headVol.putData(0, headVolBackup, 0, headVolBackup.length);
indexPages = indexPagesBackup.clone();
wal.rollback();
wal.sync();
} finally {
structuralLock.unlock();
}
} finally {
commitLock.unlock();
}
}