Examples of com.cloud.utils.db.GlobalLock.unlock()

com.cloud.utils.db.GlobalLock.unlock()

            try {
                if (scanLock.lock(20)) {
                    try {
                        runExternalLoadBalancerNetworkUsageTask();
                    } finally {
                        scanLock.unlock();
                    }
                }
            } catch (Exception e) {
                s_logger.warn("Problems while getting external load balancer device usage", e);
            } finally {

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                    }


                    if (s_logger.isDebugEnabled()) {
                        s_logger.debug("Successfully destroyed load balancer appliance used for the network" + guestConfig.getId());
                    }
                    deviceMapLock.unlock();


                    // remove the provisioned load balancer appliance from cloudstack
                    deleteExternalLoadBalancer(lbHost.getId());


                    // release the private IP back to dc pool, as the load balancer appliance is now destroyed

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                    // release the public IP allocated for this LB appliance
                    DetailVO publicIpDetail = _hostDetailDao.findDetail(lbHost.getId(), "publicip");
                    IPAddressVO ipVo = _ipAddressDao.findByIpAndDcId(guestConfig.getDataCenterId(), publicIpDetail.toString());
                    _networkMgr.disassociatePublicIpAddress(ipVo.getId(), _accountMgr.getSystemUser().getId(), _accountMgr.getSystemAccount());
                } else {
                    deviceMapLock.unlock();
                }


                return true;
            } else {
                s_logger.error("Failed to release load balancer device for the network" + guestConfig.getId() + "as failed to acquire lock ");

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            try {
                if (scanLock.lock(10)) {
                    try {
                        return collectDirectNetworkUsage(host);
                    } finally {
                        scanLock.unlock();
                    }
                }
            } finally {
                scanLock.releaseRef();
            }

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                        } catch (Exception e) {
                            s_logger.error("Error while handling " + work, e);
                        }
                    }
                } finally {
                    scanLock.unlock();
                }
            }
        } finally {
            scanLock.releaseRef();
        }

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                    } else {
                      if(s_logger.isTraceEnabled())
                        s_logger.trace("SystemVM ISO file " + destIso.getPath() + " already exists");
                    }
                } finally {
                    lock.unlock();
                }
            }
        } finally {
            lock.releaseRef();
        }

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                    caRoot.setDomainSuffix("realhostip.com");
                    caRoot.setName("root");
                    caRoot.setIndex(0);
                    _ksDao.persist(caRoot);
                }
                lock.unlock();
            }
        } finally {
            lock.releaseRef();
        }
    }

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                    //Check for ownership
                    //msHost in UP state with min id should run the job
                    ManagementServerHostVO msHost = _msHostDao.findOneInUpState(new Filter(ManagementServerHostVO.class, "id", true, 0L, 1L));
                    if(msHost == null || (msHost.getMsid() != mgmtSrvrId)){
                        s_logger.debug("Skipping aggregate network stats update");
                        scanLock.unlock();
                        return;
                    }
                    Transaction txn = Transaction.open(Transaction.CLOUD_DB);
                    try {
                        txn.start();

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                        txn.commit();
                    } catch (Exception e){
                        txn.rollback();
                        s_logger.debug("Failed to update aggregate network stats", e);
                    } finally {
                        scanLock.unlock();
                        txn.close();
                    }
                }
            } catch (Exception e){
                s_logger.debug("Exception while trying to acquire network stats lock", e);

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                            s_logger.warn("Unable to destroy " + snapshotVO.getId(), e);
                        }
                    }
                    
                } finally {
                    scanLock.unlock();
                }
            }
        } finally {
            scanLock.releaseRef();
        }

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