@Override
public Snapshot complete() {
Buffer buffer = FileBuffer.allocate(file.file(), SnapshotDescriptor.BYTES);
try (SnapshotDescriptor descriptor = new SnapshotDescriptor(buffer)) {
Assert.stateNot(descriptor.locked(), "cannot complete locked snapshot descriptor");
descriptor.lock();
}
return super.complete();
}
@Override
public synchronized SnapshotReader reader() {
Assert.state(file.file().exists(), "missing snapshot file: %s", file.file());
Buffer buffer = FileBuffer.allocate(file.file(), SnapshotDescriptor.BYTES);
SnapshotDescriptor descriptor = new SnapshotDescriptor(buffer);
int length = buffer.position(SnapshotDescriptor.BYTES).readInt();
return openReader(
new SnapshotReader(
buffer.mark().limit(SnapshotDescriptor.BYTES + Integer.BYTES + length),
this,
store.serializer()),
descriptor);
}
@Override
public synchronized SnapshotWriter writer() {
checkWriter();
SnapshotDescriptor descriptor =
SnapshotDescriptor.builder()
.withIndex(file.index())
.withTimestamp(file.timestamp())
.build();
Buffer buffer = FileBuffer.allocate(file.file(), SnapshotDescriptor.BYTES);
descriptor.copyTo(buffer);
int length = buffer.position(SnapshotDescriptor.BYTES).readInt();
return openWriter(
new SnapshotWriter(buffer.skip(length).mark(), this, store.serializer()), descriptor);
}