@Override
public void startRequest(final OSDRequest rq) {
final xtreemfs_check_objectRequest args = (xtreemfs_check_objectRequest) rq.getRequestArgs();
if (args.getObjectNumber() < 0) {
rq.sendError(ErrorType.ERRNO, POSIXErrno.POSIX_ERROR_EINVAL, "object number must be >= 0");
return;
}
master
.getStorageStage()
.readObject(
args.getFileId(),
args.getObjectNumber(),
rq.getLocationList().getLocalReplica().getStripingPolicy(),
0,
StorageLayout.FULL_OBJECT_LENGTH,
rq.getCapability().getSnapConfig() == SnapConfig.SNAP_CONFIG_ACCESS_SNAP
? rq.getCapability().getSnapTimestamp()
: 0,
rq,
new ReadObjectCallback() {
@Override
public void readComplete(ObjectInformation result, ErrorResponse error) {
step2(rq, args, result, error);
}
});
}
private void stripedCheckObjectAnalyzeGmax(
final OSDRequest rq,
final xtreemfs_check_objectRequest args,
final ObjectInformation result,
RPCResponse[] gmaxRPCs) {
long maxObjNo = -1;
long maxTruncate = -1;
try {
for (int i = 0; i < gmaxRPCs.length; i++) {
InternalGmax gmax = (InternalGmax) gmaxRPCs[i].get();
if ((gmax.getLastObjectId() > maxObjNo) && (gmax.getEpoch() >= maxTruncate)) {
// found new max
maxObjNo = gmax.getLastObjectId();
maxTruncate = gmax.getEpoch();
}
}
final boolean isLastObjectLocallyKnown = maxObjNo <= args.getObjectNumber();
readFinish(rq, args, result, isLastObjectLocallyKnown);
// and update gmax locally
master.getStorageStage().receivedGMAX_ASYNC(args.getFileId(), maxTruncate, maxObjNo);
} catch (Exception ex) {
rq.sendInternalServerError(ex);
} finally {
for (RPCResponse r : gmaxRPCs) r.freeBuffers();
}
}
private void stripedCheckObject(
final OSDRequest rq,
final xtreemfs_check_objectRequest args,
final ObjectInformation result) {
// ObjectData data;
final long objNo = args.getObjectNumber();
final long lastKnownObject =
Math.max(result.getLastLocalObjectNo(), result.getGlobalLastObjectNo());
final boolean isLastObjectLocallyKnown = lastKnownObject <= objNo;
// check if GMAX must be fetched to determin EOF
if ((objNo > lastKnownObject)
|| (objNo == lastKnownObject)
&& (result.getData() != null)
&& (result.getData().remaining() < result.getStripeSize())) {
try {
final List<ServiceUUID> osds = rq.getLocationList().getLocalReplica().getOSDs();
final RPCResponse[] gmaxRPCs = new RPCResponse[osds.size() - 1];
int cnt = 0;
for (ServiceUUID osd : osds) {
if (!osd.equals(localUUID)) {
gmaxRPCs[cnt++] =
master
.getOSDClient()
.xtreemfs_internal_get_gmax(
osd.getAddress(),
RPCAuthentication.authNone,
RPCAuthentication.userService,
args.getFileCredentials(),
args.getFileId());
}
}
this.waitForResponses(
gmaxRPCs,
new ResponsesListener() {
@Override
public void responsesAvailable() {
stripedCheckObjectAnalyzeGmax(rq, args, result, gmaxRPCs);
}
});
} catch (IOException ex) {
rq.sendInternalServerError(ex);
return;
}
} else {
readFinish(rq, args, result, isLastObjectLocallyKnown);
}
}
private void nonStripedCheckObject(
OSDRequest rq, xtreemfs_check_objectRequest args, ObjectInformation result) {
final boolean isLastObjectOrEOF = result.getLastLocalObjectNo() <= args.getObjectNumber();
readFinish(rq, args, result, isLastObjectOrEOF);
}