Examples of com.cloud.utils.db.Transaction.start()

com.cloud.utils.db.Transaction.start()

            s_logger.info("Starting cluster manager, msid : " + _msId);
        }


        Transaction txn = Transaction.currentTxn();
        try {
            txn.start();


            final Class<?> c = this.getClass();
            String version = c.getPackage().getImplementationVersion();


            ManagementServerHostVO mshost = _mshostDao.findByMsid(_msId);

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                                    try {
                                        if ((answer.getBytesReceived() == 0) && (answer.getBytesSent() == 0)) {
                                            s_logger.debug("Recieved and Sent bytes are both 0. Not updating user_statistics");
                                            continue;
                                        }
                                        txn.start();
                                        UserStatisticsVO stats = _userStatsDao.lock(router.getAccountId(),
                                                router.getDataCenterId(), network.getId(), (forVpc ? routerNic.getIp4Address() : null), router.getId(), routerType);
                                        if (stats == null) {
                                            s_logger.warn("unable to find stats for account: " + router.getAccountId());
                                            continue;

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                        scanLock.unlock();
                        return;
                    }
                    Transaction txn = Transaction.open(Transaction.CLOUD_DB);
                    try {
                        txn.start();
                        //get all stats with delta > 0
                        List<UserStatisticsVO> updatedStats = _userStatsDao.listUpdatedStats();
                        Date updatedTime = new Date();
                        for(UserStatisticsVO stat : updatedStats){
                            //update agg bytes

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        //do resource limit check
        _resourceLimitMgr.checkResourceLimit(owner, ResourceType.project);


        Transaction txn = Transaction.currentTxn();
        txn.start();


        //Create an account associated with the project
        StringBuilder acctNm = new StringBuilder("PrjAcct-");
        acctNm.append(name).append("-").append(owner.getDomainId());

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    @DB
    @Override
    public boolean deleteProject(Account caller, long callerUserId, ProjectVO project) {
        //mark project as inactive first, so you can't add resources to it
        Transaction txn = Transaction.currentTxn();
        txn.start();
        s_logger.debug("Marking project id=" + project.getId() + " with state " + State.Disabled + " as a part of project delete...");
        project.setState(State.Disabled);
        boolean updateResult = _projectDao.update(project.getId(), project);
        //owner can be already removed at this point, so adding the conditional check
        Account projectOwner = getProjectOwner(project.getId());

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        if (result) {
            //Unassign all users from the project


            Transaction txn = Transaction.currentTxn();
            txn.start();


            s_logger.debug("Unassigning all accounts from project " + project + " as a part of project cleanup...");
            List<? extends ProjectAccount> projectAccounts = _projectAccountDao.listByProjectId(project.getId());
            for (ProjectAccount projectAccount : projectAccounts) {
                result = result && unassignAccountFromProject(projectAccount.getProjectId(), projectAccount.getAccountId());

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    @Override @DB
    public boolean deleteAccountFromProject(long projectId, long accountId) {
        boolean success = true;
        Transaction txn = Transaction.currentTxn();
        txn.start();


        //remove account
        ProjectAccountVO projectAccount = _projectAccountDao.findByProjectIdAccountId(projectId, accountId);
        success = _projectAccountDao.remove(projectAccount.getId());

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        //verify permissions
        _accountMgr.checkAccess(caller,AccessType.ModifyProject, true, _accountMgr.getAccount(project.getProjectAccountId()));


        Transaction txn = Transaction.currentTxn();
        txn.start();
        if (displayText != null) {
            project.setDisplayText(displayText);
            _projectDao.update(projectId, project);
        }

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    }


    @DB
    public boolean activeInviteExists(Project project, Long accountId, String email) {
        Transaction txn = Transaction.currentTxn();
        txn.start();
        //verify if the invitation was already generated
        ProjectInvitationVO invite = null;
        if (accountId != null) {
            invite = _projectInvitationDao.findByAccountIdProjectId(accountId, project.getId());
        } else if (email != null) {

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            if (!_projectInvitationDao.isActive(invite.getId(), _invitationTimeOut) && accept) {
                expireInvitation(invite);
                throw new InvalidParameterValueException("Invitation is expired for account id=" + accountName + " to the project id=" + projectId);
            } else {
                Transaction txn = Transaction.currentTxn();
                txn.start();


                ProjectInvitation.State newState = accept ? ProjectInvitation.State.Completed : ProjectInvitation.State.Declined;


                //update invitation
                s_logger.debug("Marking invitation " + invite + " with state " + newState);

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