@Override
public void downloadTemplateToStorage(
DataObject template, AsyncCompletionCallback<DownloadAnswer> callback) {
if (template != null) {
long templateId = template.getId();
DataStore store = template.getDataStore();
if (isTemplateUpdateable(templateId, store.getId())) {
if (template.getUri() != null) {
initiateTemplateDownload(template, callback);
} else {
s_logger.info("Template url is null, cannot download");
DownloadAnswer ans = new DownloadAnswer("Template url is null", Status.UNKNOWN);
callback.complete(ans);
}
} else {
s_logger.info("Template download is already in progress or already downloaded");
DownloadAnswer ans =
new DownloadAnswer(
"Template download is already in progress or already downloaded", Status.UNKNOWN);
callback.complete(ans);
}
}
}
private void initiateTemplateDownload(
DataObject template, AsyncCompletionCallback<DownloadAnswer> callback) {
boolean downloadJobExists = false;
TemplateDataStoreVO vmTemplateStore = null;
DataStore store = template.getDataStore();
vmTemplateStore = _vmTemplateStoreDao.findByStoreTemplate(store.getId(), template.getId());
if (vmTemplateStore == null) {
vmTemplateStore =
new TemplateDataStoreVO(
store.getId(),
template.getId(),
new Date(),
0,
Status.NOT_DOWNLOADED,
null,
null,
"jobid0000",
null,
template.getUri());
vmTemplateStore.setDataStoreRole(store.getRole());
vmTemplateStore = _vmTemplateStoreDao.persist(vmTemplateStore);
} else if ((vmTemplateStore.getJobId() != null) && (vmTemplateStore.getJobId().length() > 2)) {
downloadJobExists = true;
}
Long maxTemplateSizeInBytes = getMaxTemplateSizeInBytes();
if (vmTemplateStore != null) {
start();
VirtualMachineTemplate tmpl = _templateDao.findById(template.getId());
DownloadCommand dcmd =
new DownloadCommand((TemplateObjectTO) (template.getTO()), maxTemplateSizeInBytes);
dcmd.setProxy(getHttpProxy());
if (downloadJobExists) {
dcmd =
new DownloadProgressCommand(
dcmd, vmTemplateStore.getJobId(), RequestType.GET_OR_RESTART);
}
if (vmTemplateStore.isCopy()) {
dcmd.setCreds(TemplateConstants.DEFAULT_HTTP_AUTH_USER, _copyAuthPasswd);
}
EndPoint ep = _epSelector.select(template);
if (ep == null) {
String errMsg =
"There is no secondary storage VM for downloading template to image store "
+ store.getName();
s_logger.warn(errMsg);
throw new CloudRuntimeException(errMsg);
}
DownloadListener dl = new DownloadListener(ep, store, template, _timer, this, dcmd, callback);
ComponentContext.inject(dl); // initialize those auto-wired field in download listener.
if (downloadJobExists) {
// due to handling existing download job issues, we still keep
// downloadState in template_store_ref to avoid big change in
// DownloadListener to use
// new ObjectInDataStore.State transition. TODO: fix this later
// to be able to remove downloadState from template_store_ref.
s_logger.info("found existing download job");
dl.setCurrState(vmTemplateStore.getDownloadState());
}
try {
ep.sendMessageAsync(dcmd, new UploadListener.Callback(ep.getId(), dl));
} catch (Exception e) {
s_logger.warn(
"Unable to start /resume download of template "
+ template.getId()
+ " to "
+ store.getName(),
e);
dl.setDisconnected();
dl.scheduleStatusCheck(RequestType.GET_OR_RESTART);
}
}
}