@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 preallocate() {
WriteAheadLog wal = new WriteAheadLog(null);
wal.open(WriteAheadLog.NOREPLAY);
wal.startNextFile();
wal.walPutPreallocate(111111L);
wal.seal();
final AtomicInteger c = new AtomicInteger();
wal.replayWAL(
new WriteAheadLog.WALReplay() {
@Override
public void beforeReplayStart() {}
@Override
public void afterReplayFinished() {}
@Override
public void writeLong(long offset, long value) {
fail();
}
@Override
public void writeRecord(long recid, long walId, Volume vol, long volOffset, int length) {
fail();
}
@Override
public void writeByteArray(
long offset, long walId, Volume vol, long volOffset, int length) {
fail();
}
@Override
public void commit() {
fail();
}
@Override
public void rollback() {
fail();
}
@Override
public void writeTombstone(long recid) {
fail();
}
@Override
public void writePreallocate(long recid) {
c.incrementAndGet();
assertEquals(111111L, recid);
}
});
assertEquals(1, c.get());
}
@Test
public void commit() {
WriteAheadLog wal = new WriteAheadLog(null);
wal.open(WriteAheadLog.NOREPLAY);
wal.walPutLong(111L, 1111L);
wal.commit();
wal.seal();
wal.replayWAL(
new WALSequence(
new Object[] {WALSequence.beforeReplayStart},
new Object[] {WALSequence.writeLong, 111L, 1111L},
new Object[] {WALSequence.commit}));
}
@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 empty_commit() {
String f = TT.tempDbFile().getPath();
WriteAheadLog wal = new WriteAheadLog(f);
byte[] b = TT.randomByteArray(1024);
wal.walPutRecord(33L, b, 0, b.length);
wal.commit();
wal.commit();
wal.seal();
wal.close();
wal = new WriteAheadLog(f);
wal.open(
new WALSequence(
new Object[] {WALSequence.beforeReplayStart},
new Object[] {WALSequence.writeRecord, 33L, 16L, b},
new Object[] {WALSequence.commit},
new Object[] {WALSequence.commit}));
}
void testRecord(final long recid, final byte[] data) {
WriteAheadLog wal = new WriteAheadLog(null);
wal.open(WriteAheadLog.NOREPLAY);
wal.startNextFile();
final AtomicBoolean called = new AtomicBoolean();
final long pointer = wal.walPutRecord(recid, data, 0, data == null ? 0 : data.length);
for (int i = 0; i < 1; i++) {
byte[] val = wal.walGetRecord(pointer, recid);
if (data == null) assertNull(val);
else assertTrue(Arrays.equals(data, val));
wal.seal();
}
WriteAheadLog.WALReplay r =
new WriteAheadLog.WALReplay() {
@Override
public void beforeReplayStart() {}
@Override
public void afterReplayFinished() {}
@Override
public void writeLong(long offset, long value) {
fail();
}
@Override
public void writeRecord(long recid2, long walId, Volume vol, long volOffset, int length) {
assertFalse(called.getAndSet(true));
assertEquals(recid, recid2);
if (data == null) {
assertNull(vol);
assertEquals(walId, 0);
assertEquals(volOffset, 0);
assertEquals(length, 0);
} else {
byte[] data = new byte[length];
vol.getData(volOffset, data, 0, data.length);
assertTrue(Arrays.equals(data, data));
assertEquals(pointer, walId);
}
}
@Override
public void writeByteArray(
long offset2, long walId, Volume vol, long volOffset, int length) {
fail();
}
@Override
public void commit() {
fail();
}
@Override
public void rollback() {
fail();
}
@Override
public void writeTombstone(long recid) {
fail();
}
@Override
public void writePreallocate(long recid) {
fail();
}
};
wal.replayWAL(r);
assertTrue(called.get());
}