本文整理了Java中org.zstack.core.db.Q.isNull方法的一些代码示例，展示了Q.isNull的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Q.isNull方法的具体详情如下：
包路径：org.zstack.core.db.Q
类名称：Q
方法名：isNull

Q.isNull介绍

暂无

代码示例

代码示例来源：origin: zstackio/zstack

@Override
  public void prepareDbInitialValue() {
    List<VipVO> vipVOS = Q.New(VipVO.class).isNull(VipVO_.prefixLen).list();
    for (VipVO vip : vipVOS) {
      vip.setPrefixLen(NetworkUtils.getPrefixLengthFromNetwork(vip.getNetmask()));
    }
    if (!vipVOS.isEmpty()) {
      dbf.updateCollection(vipVOS);
    }
  }
}

代码示例来源：origin: zstackio/zstack

static VmCdRomVO getEmptyCdRom(String vmUuid) {
  VmCdRomVO cdRomVO = Q.New(VmCdRomVO.class)
      .eq(VmCdRomVO_.vmInstanceUuid, vmUuid)
      .isNull(VmCdRomVO_.isoUuid)
      .orderBy(VmCdRomVO_.deviceId, SimpleQuery.Od.ASC)
      .limit(1)
      .find();
  return cdRomVO;
}

代码示例来源：origin: zstackio/zstack

private void loadOrphanJobs() {
  List<GarbageCollectorVO> vos = Q.New(GarbageCollectorVO.class)
      .eq(GarbageCollectorVO_.status, GCStatus.Idle)
      .isNull(GarbageCollectorVO_.managementNodeUuid)
      .list();
  int count = 0;
  for (GarbageCollectorVO vo : vos) {
    if (!destinationMaker.isManagedByUs(vo.getUuid())) {
      continue;
    }
    loadGCJob(vo);
    count ++;
  }
  logger.debug(String.format("[GC] loaded %s orphan jobs", count));
}

代码示例来源：origin: zstackio/zstack

static void checkAttachIsoToVm(String vmUuid, String isoUuid) {
  List<String> isoList = getIsoUuidByVmUuid(vmUuid);
  if (isoList.contains(isoUuid)) {
    throw new OperationFailureException(operr("VM[uuid:%s] has attached ISO[uuid:%s]", vmUuid, isoUuid));
  }
  long emptyCdRomNum = Q.New(VmCdRomVO.class)
      .eq(VmCdRomVO_.vmInstanceUuid, vmUuid)
      .isNull(VmCdRomVO_.isoUuid)
      .count();
  if (emptyCdRomNum == 0) {
    throw new OperationFailureException(operr("All vm[uuid:%s] CD-ROMs have mounted ISO", vmUuid));
  }
}

代码示例来源：origin: zstackio/zstack

@Override
  public void prepareDbInitialValue() {
    List<IpRangeVO> ipRangeVOS = Q.New(IpRangeVO.class).isNull(IpRangeVO_.prefixLen).list();
    for (IpRangeVO ipr : ipRangeVOS) {
      ipr.setPrefixLen(NetworkUtils.getPrefixLengthFromNetwork(ipr.getNetmask()));
    }
    if (!ipRangeVOS.isEmpty()) {
      dbf.updateCollection(ipRangeVOS);
    }

    List<VmNicVO> nics = Q.New(VmNicVO.class).notNull(VmNicVO_.usedIpUuid).list();
    List<UsedIpVO> ips = new ArrayList<>();
    for (VmNicVO nic : nics) {
      UsedIpVO ip = Q.New(UsedIpVO.class).eq(UsedIpVO_.uuid, nic.getUsedIpUuid()).isNull(UsedIpVO_.vmNicUuid).find();
      if (ip != null) {
        ip.setVmNicUuid(nic.getUuid());
        ips.add(ip);
      }
    }

    if (!ips.isEmpty()) {
      dbf.updateCollection(ips);
    }
  }
}

代码示例来源：origin: zstackio/zstack

.isNull(SecurityGroupRuleVO_.remoteSecurityGroupUuid).list();
if (rules.isEmpty()) {
  continue;

代码示例来源：origin: zstackio/zstack

@Override
  protected List<LongJobVO> scripts() {
    // check long jobs using same uuid with current node
    List<LongJobVO> vos = Q.New(LongJobVO.class)
        .eq(LongJobVO_.managementNodeUuid, Platform.getManagementServerId())
        .eq(LongJobVO_.state, LongJobState.Running)
        .list();
    vos.forEach(vo -> {
      if (destinationMaker.isManagedByUs(vo.getUuid())) {
        vo.setJobResult("Failed because management node restarted.");
        vo.setState(LongJobState.Failed);
        merge(vo);
      }
    });
    vos = Q.New(LongJobVO.class).isNull(LongJobVO_.managementNodeUuid).list();
    vos.removeIf(it -> !destinationMaker.isManagedByUs(it.getUuid()));
    vos.forEach(it -> {
      it.setManagementNodeUuid(Platform.getManagementServerId());
      merge(it);
    });
    return vos;
  }
}.execute();

代码示例来源：origin: zstackio/zstack

private void takeOverLongJob() {
  logger.debug("Starting to take over long jobs");
  final int group = 1000;
  long amount = dbf.count(LongJobVO.class);
  int times = (int) ((amount + group - 1)/group);
  int start = 0;
  for (int i = 0; i < times; i++) {
    List<String> uuids = Q.New(LongJobVO.class)
        .select(LongJobVO_.uuid)
        .isNull(LongJobVO_.managementNodeUuid)
        .limit(group).start(start).listValues();
    for (String uuid : uuids) {
      if (destinationMaker.isManagedByUs(uuid)) {
        retryTakeOverLongJob(uuid);
      }
    }
    start += group;
  }
}

代码示例来源：origin: zstackio/zstack

.isNull(VmInstanceVO_.clusterUuid)
.eq(VmInstanceVO_.uuid, msg.getVmInstanceUuid())
.isExists()) {