/** master和slave之间的同步状态 */
public void heartBeat() {
ReplicationRequest command = new ReplicationRequest(true);
command.setBuckNo(bucket);
command.setEnvType(EnvType.HEART_BEAT);
packageRequestHeader(command);
try {
Response rsp = (Response) ioSession.syncSendPacket(command, RMI_TIMEOUT);
if (!rsp.isFailure()) {
Long maxSeq = (Long) rsp.getContent();
if (log.isInfoEnabled()) {
log.info(
"{}-bucket master-slave max sequence is [{}, {}].", bucket, maxSeq, pos.curMaxSeq());
}
} else {
throw new SyncMasterDataException(rsp.getErrorCode());
}
} catch (HippoException e) {
throw new SyncMasterDataException("Rmi error! " + master + "-" + bucket, e);
}
}
private Position doBackup(Position pos) {
ReplicationRequest command = new ReplicationRequest();
command.setPos(pos);
command.setBuckNo(bucket);
command.setSize(replication_batch_size);
packageRequestHeader(command);
Position next = null;
try {
Response rsp = (Response) ioSession.syncSendPacket(command, RMI_TIMEOUT);
if (!rsp.isFailure()) {
next = (Position) rsp.getContent();
byte[] d = rsp.getData();
if (d != null) {
SyncResult r = storeEngine.set(d, bucket);
if (!r.isSuccess()) {
// 回滚
pos.pointer(next.pointer());
throw new SyncMasterDataException("save migration data error.");
}
}
// 提交,默认情况下服务端会维护offset，不需要客户端设置
next.pointer(-1);
return next;
} else {
String ec = rsp.getErrorCode();
if (fileNotFound.equals(ec)) {
throw new VersionExpiredException("version expire");
} else if (uninited.equals(ec)) {
throw new SyncMasterDataException("migrationEngine uninited");
} else {
throw new SyncMasterDataException("unknow error = " + ec);
}
}
} catch (HippoException e) {
throw new SyncMasterDataException("Rmi error! " + master + "-" + bucket, e);
}
}