/// <exception cref="Javax.Servlet.ServletException"/>
/// <exception cref="System.IO.IOException"/>
protected override void DoGet(HttpServletRequest request, HttpServletResponse response
)
{
FileInputStream editFileIn = null;
try
{
ServletContext context = GetServletContext();
Configuration conf = (Configuration)GetServletContext().GetAttribute(JspHelper.CurrentConf
);
string journalId = request.GetParameter(JournalIdParam);
QuorumJournalManager.CheckJournalId(journalId);
JNStorage storage = JournalNodeHttpServer.GetJournalFromContext(context, journalId
).GetStorage();
// Check security
if (!CheckRequestorOrSendError(conf, request, response))
{
return;
}
// Check that the namespace info is correct
if (!CheckStorageInfoOrSendError(storage, request, response))
{
return;
}
long segmentTxId = ServletUtil.ParseLongParam(request, SegmentTxidParam);
FileJournalManager fjm = storage.GetJournalManager();
FilePath editFile;
lock (fjm)
{
// Synchronize on the FJM so that the file doesn't get finalized
// out from underneath us while we're in the process of opening
// it up.
FileJournalManager.EditLogFile elf = fjm.GetLogFile(segmentTxId);
if (elf == null)
{
response.SendError(HttpServletResponse.ScNotFound, "No edit log found starting at txid "
+ segmentTxId);
return;
}
editFile = elf.GetFile();
ImageServlet.SetVerificationHeadersForGet(response, editFile);
ImageServlet.SetFileNameHeaders(response, editFile);
editFileIn = new FileInputStream(editFile);
}
DataTransferThrottler throttler = ImageServlet.GetThrottler(conf);
// send edits
TransferFsImage.CopyFileToStream(response.GetOutputStream(), editFile, editFileIn
, throttler);
}
catch (Exception t)
{
string errMsg = "getedit failed. " + StringUtils.StringifyException(t);
response.SendError(HttpServletResponse.ScInternalServerError, errMsg);
throw new IOException(errMsg);
}
finally
{
IOUtils.CloseStream(editFileIn);
}
}
/// <param name="request">the object from which this servlet reads the url contents</param>
/// <param name="response">the object into which this servlet writes the url contents
/// </param>
/// <exception cref="System.IO.IOException">if the request is bad</exception>
public GetImageParams(HttpServletRequest request, HttpServletResponse response)
{
IDictionary <string, string[]> pmap = request.GetParameterMap();
isGetImage = isGetEdit = fetchLatest = false;
foreach (KeyValuePair <string, string[]> entry in pmap)
{
string key = entry.Key;
string[] val = entry.Value;
if (key.Equals("getimage"))
{
isGetImage = true;
try
{
txId = ServletUtil.ParseLongParam(request, TxidParam);
string imageType = ServletUtil.GetParameter(request, ImageFileType);
nnf = imageType == null ? NNStorage.NameNodeFile.Image : NNStorage.NameNodeFile.ValueOf
(imageType);
}
catch (FormatException nfe)
{
if (request.GetParameter(TxidParam).Equals(LatestFsimageValue))
{
fetchLatest = true;
}
else
{
throw;
}
}
}
else
{
if (key.Equals("getedit"))
{
isGetEdit = true;
startTxId = ServletUtil.ParseLongParam(request, StartTxidParam);
endTxId = ServletUtil.ParseLongParam(request, EndTxidParam);
}
else
{
if (key.Equals(StorageinfoParam))
{
storageInfoString = val[0];
}
}
}
}
int numGets = (isGetImage ? 1 : 0) + (isGetEdit ? 1 : 0);
if ((numGets > 1) || (numGets == 0))
{
throw new IOException("Illegal parameters to TransferFsImage");
}
}
/// <exception cref="System.IO.IOException"/>
public PutImageParams(HttpServletRequest request, HttpServletResponse response, Configuration
conf)
{
/*
* Params required to handle put image request
*/
txId = ServletUtil.ParseLongParam(request, TxidParam);
storageInfoString = ServletUtil.GetParameter(request, StorageinfoParam);
fileSize = ServletUtil.ParseLongParam(request, TransferFsImage.FileLength);
string imageType = ServletUtil.GetParameter(request, ImageFileType);
nnf = imageType == null ? NNStorage.NameNodeFile.Image : NNStorage.NameNodeFile.ValueOf
(imageType);
if (fileSize == 0 || txId == -1 || storageInfoString == null || storageInfoString
.IsEmpty())
{
throw new IOException("Illegal parameters to TransferFsImage");
}
}
