public void AckRequest(string host, AcknowledgeDto acknowledgeDto)
{
using (var cf = GetChannelFactory(host))
{
cf.CreateChannel().AckRequest(acknowledgeDto);
}
}
private void ConfirmPendingUpdate(Document document, AcknowledgeDto dto)
{
var result = _diffMatchPatch.patch_apply(document.PendingUpdate.Patch, document.Content);
if (CheckResultIsValidOtherwiseReOpen(result, dto.DocumentId))
{
document.PendingUpdate.NewRevisionId = dto.NewRevisionId;
document.PendingUpdate.NewHash = dto.NewHash;
UpdateDocument(document, document.PendingUpdate, result);
}
var currentText = _editor.GetText(dto.DocumentId);
if (document.Content != currentText)
{
//send next update
var updateDto = CreateUpdateDto(document, currentText);
document.PendingUpdate = updateDto;
SendUpdateToDocumentOwner(document, updateDto);
}
else
{
document.PendingUpdate = null;
}
}
public void AckRequest(string host, AcknowledgeDto acknowledgeDto)
{
using (var cf = GetChannelFactory(host))
{
cf.CreateChannel().AckRequest(acknowledgeDto);
}
}
public void AckRequest(AcknowledgeDto dto)
{
//do we know the document?
if (_documents.ContainsKey(dto.DocumentId))
{
var document = _documents[dto.DocumentId];
if (document.Owner != _memberName && document.PendingUpdate != null)
{
if (document.PendingUpdate.PreviousRevisionId == dto.PreviousRevisionId && document.PendingUpdate.PreviousHash.SequenceEqual(dto.PreviousHash))
{
ConfirmPendingUpdate(document, dto);
}
else if (document.OutOfSyncAcknowledge != null)
{
document.OutOfSyncAcknowledge = dto;
}
else
{
ReOpenDocument(document.Id);
}
}
}
}
public void AckRequest(AcknowledgeDto dto)
{
//do we know the document?
if (_documents.ContainsKey(dto.DocumentId))
{
var document = _documents[dto.DocumentId];
if (document.Owner != _memberName && document.PendingUpdate != null)
{
if (document.PendingUpdate.PreviousRevisionId == dto.PreviousRevisionId && document.PendingUpdate.PreviousHash.SequenceEqual(dto.PreviousHash))
{
ConfirmPendingUpdate(document, dto);
}
else if (document.OutOfSyncAcknowledge != null)
{
document.OutOfSyncAcknowledge = dto;
}
else
{
ReOpenDocument(document.Id);
}
}
}
}
private void CreatePatchForUpdate(Document document, UpdateDto updateDto)
{
var currentRevision = document.GetCurrentRevision();
var lastUpdate = currentRevision.UpdateDto;
//non existing revision - used as null object
var secondLastUpdate = new UpdateDto {
NewRevisionId = -1
};
if (document.CurrentRevisionId > FIRST_VALID_REVISON_ID)
{
secondLastUpdate = document.GetRevision(document.CurrentRevisionId - 1).UpdateDto;
}
bool creationSucessfull = false;
//update is either based on current version
//or on previous version where
// - the member which initialised the previous version was the owner itself
// - or a member with a lower member name (and thus the given update will be applied afterwards)
//)
if (IsFirstPreviousOfSecond(lastUpdate, updateDto) ||
(IsFirstPreviousOfSecond(secondLastUpdate, updateDto) &&
MemberOfFirstUpdateIsOwnerOrLowerMember(lastUpdate, updateDto)
)
)
{
var result = _diffMatchPatch.patch_apply(updateDto.Patch, document.Content);
if (result.Item2.All(x => x))
{
document.Content = result.Item1;
creationSucessfull = true;
}
else
{
HandleErrorOnUpdate(updateDto);
}
}
else
{
var revision = document.GetRevision(updateDto.PreviousRevisionId);
if (revision.Id + SUPPORTED_NUM_OF_REACTIVE_UPDATES >= currentRevision.Id)
{
var nextRevision = document.GetRevision(revision.Id + 1);
//move to next revision as long as
while (
nextRevision.UpdateDto.PreviousHash.SequenceEqual(updateDto.PreviousHash) &&
MemberOfFirstUpdateIsNotOwnerAndHigherMember(updateDto, nextRevision.UpdateDto) &&
nextRevision.Id < currentRevision.Id)
{
revision = nextRevision;
nextRevision = document.GetRevision(nextRevision.Id + 1);
}
var content = revision.Content;
var tmpRevision = revision;
var patch = updateDto.Patch;
//apply all patches on top of the found revision
while (tmpRevision.Id <= currentRevision.Id)
{
var result = _diffMatchPatch.patch_apply(patch, content);
if (result.Item2.All(x => x))
{
content = result.Item1;
if (tmpRevision.Id == currentRevision.Id)
{
break;
}
tmpRevision = document.GetRevision(tmpRevision.Id + 1);
patch = tmpRevision.UpdateDto.Patch;
}
else
{
HandleErrorOnUpdate(updateDto);
}
}
document.Content = content;
updateDto.Patch = _diffMatchPatch.patch_make(currentRevision.Content, content);
creationSucessfull = true;
}
}
if (creationSucessfull)
{
document.CurrentRevisionId = currentRevision.Id + 1;
document.CurrentHash = GetHash(document.Content);
updateDto.NewRevisionId = document.CurrentRevisionId;
updateDto.NewHash = document.CurrentHash;
document.AddRevision(new Revision
{
Id = document.CurrentRevisionId,
Content = document.Content,
UpdateDto = updateDto
});
if (IsNotOwnUpdate(updateDto))
{
_editor.UpdateText(updateDto.DocumentId, document.Content);
var acknowledgeDto = new AcknowledgeDto
{
PreviousRevisionId = updateDto.PreviousRevisionId,
PreviousHash = updateDto.PreviousHash,
NewRevisionId = updateDto.NewRevisionId,
NewHash = updateDto.NewHash,
DocumentId = document.Id
};
_communication.AckRequest(updateDto.MemberHost, acknowledgeDto);
}
var newUpdateDto = new UpdateDto
{
DocumentId = document.Id,
MemberName = updateDto.MemberName,
MemberHost = _serverHost,
PreviousRevisionId = updateDto.PreviousRevisionId,
PreviousHash = updateDto.PreviousHash,
NewRevisionId = updateDto.NewRevisionId,
NewHash = updateDto.NewHash,
Patch = updateDto.Patch,
EditorCount = document.EditorCount
};
foreach (var editorHost in document.Editors().Values)
{
if (updateDto.MemberHost != editorHost)
{
try
{
_communication.UpdateRequest(editorHost, newUpdateDto);
}
catch (EndpointNotFoundException)
{
document.Editors().Remove(editorHost);
}
}
}
}
else if (IsNotOwnUpdate(updateDto))
{
HandleErrorOnUpdate(updateDto);
}
}
private void CreatePatchForUpdate(Document document, UpdateDto updateDto)
{
var currentRevision = document.GetCurrentRevision();
var lastUpdate = currentRevision.UpdateDto;
//non existing revision - used as null object
var secondLastUpdate = new UpdateDto {NewRevisionId = -1};
if (document.CurrentRevisionId > FIRST_VALID_REVISON_ID)
{
secondLastUpdate=document.GetRevision(document.CurrentRevisionId - 1).UpdateDto;
}
bool creationSucessfull = false;
//update is either based on current version
//or on previous version where
// - the member which initialised the previous version was the owner itself
// - or a member with a lower member name (and thus the given update will be applied afterwards)
//)
if (IsFirstPreviousOfSecond(lastUpdate, updateDto) ||
(IsFirstPreviousOfSecond(secondLastUpdate, updateDto)
&& MemberOfFirstUpdateIsOwnerOrLowerMember(lastUpdate, updateDto)
)
)
{
var result = _diffMatchPatch.patch_apply(updateDto.Patch, document.Content);
if (result.Item2.All(x => x))
{
document.Content = result.Item1;
creationSucessfull = true;
}else
{
HandleErrorOnUpdate(updateDto);
}
}
else
{
var revision = document.GetRevision(updateDto.PreviousRevisionId);
if (revision.Id + SUPPORTED_NUM_OF_REACTIVE_UPDATES >= currentRevision.Id)
{
var nextRevision = document.GetRevision(revision.Id + 1);
//move to next revision as long as
while (
nextRevision.UpdateDto.PreviousHash.SequenceEqual(updateDto.PreviousHash)
&& MemberOfFirstUpdateIsNotOwnerAndHigherMember(updateDto, nextRevision.UpdateDto)
&& nextRevision.Id < currentRevision.Id)
{
revision = nextRevision;
nextRevision = document.GetRevision(nextRevision.Id + 1);
}
var content = revision.Content;
var tmpRevision = revision;
var patch = updateDto.Patch;
//apply all patches on top of the found revision
while (tmpRevision.Id <= currentRevision.Id)
{
var result = _diffMatchPatch.patch_apply(patch, content);
if (result.Item2.All(x => x))
{
content = result.Item1;
if (tmpRevision.Id == currentRevision.Id)
{
break;
}
tmpRevision = document.GetRevision(tmpRevision.Id + 1);
patch = tmpRevision.UpdateDto.Patch;
}
else
{
HandleErrorOnUpdate(updateDto);
}
}
document.Content = content;
updateDto.Patch = _diffMatchPatch.patch_make(currentRevision.Content, content);
creationSucessfull = true;
}
}
if (creationSucessfull)
{
document.CurrentRevisionId = currentRevision.Id + 1;
document.CurrentHash = GetHash(document.Content);
updateDto.NewRevisionId = document.CurrentRevisionId;
updateDto.NewHash = document.CurrentHash;
document.AddRevision(new Revision
{
Id = document.CurrentRevisionId,
Content = document.Content,
UpdateDto = updateDto
});
if (IsNotOwnUpdate(updateDto))
{
_editor.UpdateText(updateDto.DocumentId, document.Content);
var acknowledgeDto = new AcknowledgeDto
{
PreviousRevisionId = updateDto.PreviousRevisionId,
PreviousHash = updateDto.PreviousHash,
NewRevisionId = updateDto.NewRevisionId,
NewHash = updateDto.NewHash,
DocumentId = document.Id
};
_communication.AckRequest(updateDto.MemberHost, acknowledgeDto);
}
var newUpdateDto = new UpdateDto
{
DocumentId = document.Id,
MemberName = updateDto.MemberName,
MemberHost = _serverHost,
PreviousRevisionId = updateDto.PreviousRevisionId,
PreviousHash = updateDto.PreviousHash,
NewRevisionId = updateDto.NewRevisionId,
NewHash = updateDto.NewHash,
Patch = updateDto.Patch,
EditorCount = document.EditorCount
};
foreach (var editorHost in document.Editors().Values)
{
if (updateDto.MemberHost != editorHost)
{
try
{
_communication.UpdateRequest(editorHost, newUpdateDto);
}
catch (EndpointNotFoundException)
{
document.Editors().Remove(editorHost);
}
}
}
}
else if (IsNotOwnUpdate(updateDto))
{
HandleErrorOnUpdate(updateDto);
}
}
private void ConfirmPendingUpdate(Document document, AcknowledgeDto dto)
{
var result = _diffMatchPatch.patch_apply(document.PendingUpdate.Patch, document.Content);
if (CheckResultIsValidOtherwiseReOpen(result, dto.DocumentId))
{
document.PendingUpdate.NewRevisionId = dto.NewRevisionId;
document.PendingUpdate.NewHash = dto.NewHash;
UpdateDocument(document, document.PendingUpdate, result);
}
var currentText = _editor.GetText(dto.DocumentId);
if (document.Content != currentText)
{
//send next update
var updateDto = CreateUpdateDto(document, currentText);
document.PendingUpdate = updateDto;
SendUpdateToDocumentOwner(document, updateDto);
}
else
{
document.PendingUpdate = null;
}
}