long poolId = pool.getId();
long templateId = template.getId();
long dcId = pool.getDataCenterId();
VMTemplateStoragePoolVO templateStoragePoolRef = null;
VMTemplateHostVO templateHostRef = null;
long templateStoragePoolRefId;
String origUrl = null;
templateStoragePoolRef = _tmpltPoolDao.findByPoolTemplate(poolId, templateId);
if (templateStoragePoolRef != null) {
templateStoragePoolRef.setMarkedForGC(false);
_tmpltPoolDao.update(templateStoragePoolRef.getId(), templateStoragePoolRef);
if (templateStoragePoolRef.getDownloadState() == Status.DOWNLOADED) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Template " + templateId + " has already been downloaded to pool " + poolId);
}
return templateStoragePoolRef;
}
}
templateHostRef = _storageMgr.findVmTemplateHost(templateId, pool);
if (templateHostRef == null || templateHostRef.getDownloadState() != Status.DOWNLOADED) {
String result = downloadTemplateFromSwiftToSecondaryStorage(dcId, templateId);
if (result != null) {
s_logger.error("Unable to find a secondary storage host who has completely downloaded the template.");
return null;
}
templateHostRef = _storageMgr.findVmTemplateHost(templateId, pool);
if (templateHostRef == null || templateHostRef.getDownloadState() != Status.DOWNLOADED) {
s_logger.error("Unable to find a secondary storage host who has completely downloaded the template.");
return null;
}
}
HostVO sh = _hostDao.findById(templateHostRef.getHostId());
origUrl = sh.getStorageUrl();
if (origUrl == null) {
throw new CloudRuntimeException("Unable to find the orig.url from host " + sh.toString());
}
if (templateStoragePoolRef == null) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Downloading template " + templateId + " to pool " + poolId);
}
templateStoragePoolRef = new VMTemplateStoragePoolVO(poolId, templateId);
try {
templateStoragePoolRef = _tmpltPoolDao.persist(templateStoragePoolRef);
templateStoragePoolRefId = templateStoragePoolRef.getId();
} catch (Exception e) {
s_logger.debug("Assuming we're in a race condition: " + e.getMessage());
templateStoragePoolRef = _tmpltPoolDao.findByPoolTemplate(poolId, templateId);
if (templateStoragePoolRef == null) {
throw new CloudRuntimeException("Unable to persist a reference for pool " + poolId + " and template " + templateId);
}
templateStoragePoolRefId = templateStoragePoolRef.getId();
}
} else {
templateStoragePoolRefId = templateStoragePoolRef.getId();
}
List<StoragePoolHostVO> vos = _poolHostDao.listByHostStatus(poolId, com.cloud.host.Status.Up);
if (vos == null || vos.isEmpty()){
throw new CloudRuntimeException("Cannot download " + templateId + " to poolId " + poolId + " since there is no host in the Up state connected to this pool");
}
templateStoragePoolRef = _tmpltPoolDao.acquireInLockTable(templateStoragePoolRefId, _storagePoolMaxWaitSeconds);
if (templateStoragePoolRef == null) {
throw new CloudRuntimeException("Unable to acquire lock on VMTemplateStoragePool: " + templateStoragePoolRefId);
}
try {
if (templateStoragePoolRef.getDownloadState() == Status.DOWNLOADED) {
return templateStoragePoolRef;
}
String url = origUrl + "/" + templateHostRef.getInstallPath();
PrimaryStorageDownloadCommand dcmd = new PrimaryStorageDownloadCommand(template.getUniqueName(), url, template.getFormat(),
template.getAccountId(), pool.getId(), pool.getUuid(), _primaryStorageDownloadWait);
HostVO secondaryStorageHost = _hostDao.findById(templateHostRef.getHostId());
assert(secondaryStorageHost != null);
dcmd.setSecondaryStorageUrl(secondaryStorageHost.getStorageUrl());
// TODO temporary hacking, hard-coded to NFS primary data store
dcmd.setPrimaryStorageUrl("nfs://" + pool.getHostAddress() + pool.getPath());