How to use

backup

method

in

io.atomix.primitive.service.PrimitiveService

@Override
public CompletableFuture<RestoreResponse> restore(RestoreRequest request) {
 logRequest(request);
 if (request.term() != context.currentTerm()) {
  return CompletableFuture.completedFuture(logResponse(RestoreResponse.error()));
 }
 HeapBuffer buffer = HeapBuffer.allocate();
 try {
  Collection<PrimaryBackupSession> sessions = context.getSessions();
  buffer.writeInt(sessions.size());
  for (Session session : sessions) {
   buffer.writeLong(session.sessionId().id());
   buffer.writeString(session.memberId().id());
  }
  context.service().backup(new DefaultBackupOutput(buffer, context.service().serializer()));
  buffer.flip();
  byte[] bytes = buffer.readBytes(buffer.remaining());
  return CompletableFuture.completedFuture(
      RestoreResponse.ok(context.currentIndex(), context.currentTimestamp(), bytes))
      .thenApply(this::logResponse);
 } finally {
  buffer.release();
 }
}

/**
 * Takes a snapshot of the service state.
 */
public void takeSnapshot(SnapshotWriter writer) {
 log.debug("Taking snapshot {}", writer.snapshot().index());
 // Serialize sessions to the in-memory snapshot and request a snapshot from the state machine.
 writer.writeLong(primitiveId.id());
 writer.writeString(primitiveType.name());
 writer.writeString(serviceName);
 writer.writeLong(currentIndex);
 writer.writeLong(currentTimestamp);
 writer.writeLong(timestampDelta);
 writer.writeInt(sessions.getSessions().size());
 for (RaftSession session : sessions.getSessions()) {
  writer.writeLong(session.sessionId().id());
  writer.writeString(session.memberId().id());
  writer.writeString(session.readConsistency().name());
  writer.writeLong(session.minTimeout());
  writer.writeLong(session.maxTimeout());
  writer.writeLong(session.getLastUpdated());
  writer.writeLong(session.getRequestSequence());
  writer.writeLong(session.getCommandSequence());
  writer.writeLong(session.getEventIndex());
  writer.writeLong(session.getLastCompleted());
 }
 service.backup(new DefaultBackupOutput(writer, service.serializer()));
}