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

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

        if (stickyMethod != null && !GlobalLoadBalancerRule.Persistence.isValidPersistence(stickyMethod)) {
            throw new InvalidParameterValueException("Invalid persistence: " + stickyMethod);
        }


        Transaction txn = Transaction.currentTxn();
        txn.start();
        if (algorithm != null) {
            gslbRule.setAlgorithm(algorithm);
        }
        if (stickyMethod != null) {
            gslbRule.setPersistence(stickyMethod);

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            throw new InvalidParameterValueException("Unable to create affinity group, a group with name "
                    + affinityGroupName + " already exisits under the domain.");
        }


        Transaction txn = Transaction.currentTxn();
        txn.start();
        
        AffinityGroupVO group = new AffinityGroupVO(affinityGroupName, affinityGroupType, description, owner.getDomainId(),
                owner.getId(), aclType);
        _affinityGroupDao.persist(group);

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        }
        // check permissions
        _accountMgr.checkAccess(caller, AccessType.ModifyEntry, true, group);


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


        group = _affinityGroupDao.lockRow(affinityGroupId, true);
        if (group == null) {
            throw new InvalidParameterValueException("Unable to find affinity group by id " + affinityGroupId);
        }

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    @Override @DB
    public long submitAsyncJob(AsyncJobVO job, boolean scheduleJobExecutionInContext) {
        Transaction txt = Transaction.currentTxn();
        try {
            txt.start();
            job.setInitMsid(getMsid());
            _jobDao.persist(job);
            txt.commit();


            // no sync source originally

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            return;
        }


        Transaction txt = Transaction.currentTxn();
        try {
            txt.start();
            job.setCompleteMsid(getMsid());
            job.setStatus(jobStatus);
            job.setResultCode(resultCode);


            publishOnEventBus(job, "complete"); // publish before the instance type and ID are wiped out

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            return;
        }


        Transaction txt = Transaction.currentTxn();
        try {
            txt.start();
            job.setProcessStatus(processStatus);
            if(resultObject != null) {
                job.setResult(ApiSerializerHelper.toSerializedStringOld(resultObject));
            }
            job.setLastUpdated(DateUtil.currentGMTTime());

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            return;
        }


        Transaction txt = Transaction.currentTxn();
        try {
            txt.start();
            //job.setInstanceType(instanceType);
            job.setInstanceId(instanceId);
            job.setLastUpdated(DateUtil.currentGMTTime());
            _jobDao.update(jobId, job);

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        Transaction txt = Transaction.currentTxn();
        AsyncJobResult jobResult = new AsyncJobResult(jobId);


        try {
            txt.start();
            if(job != null) {
                jobResult.setCmdOriginator(job.getCmdOriginator());
                jobResult.setJobStatus(job.getStatus());
                jobResult.setProcessStatus(job.getProcessStatus());
                jobResult.setResult(job.getResult());

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    }


    @DB
    protected void expungeAsyncJob(AsyncJobVO job) {
        Transaction txn = Transaction.currentTxn();
        txn.start();
        _jobDao.expunge(job.getId());
        //purge corresponding sync queue item
        _queueMgr.purgeAsyncJobQueueItemId(job.getId());
        txn.commit();
    }

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    @Override
    public void onManagementNodeLeft(List<ManagementServerHostVO> nodeList, long selfNodeId) {
        for(ManagementServerHostVO msHost : nodeList) {
            Transaction txn = Transaction.open(Transaction.CLOUD_DB);
            try {
                txn.start();
                List<SyncQueueItemVO> items = _queueMgr.getActiveQueueItems(msHost.getId(), true);
                cleanupPendingJobs(items);
                _jobDao.resetJobProcess(msHost.getId(), ApiErrorCode.INTERNAL_ERROR.getHttpCode(), getSerializedErrorMessage("job cancelled because of management server restart"));
                txn.commit();
            } catch(Throwable e) {

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