/// <exception cref="Couchbase.Lite.CouchbaseLiteException">When attempting to add an invalid revision</exception>
internal void ForceInsert(RevisionInternal inRev, IList<string> revHistory, Uri source)
{
if (revHistory == null) {
revHistory = new List<string>(0);
}
var rev = inRev.CopyWithDocID(inRev.GetDocId(), inRev.GetRevId());
rev.SetSequence(0);
string revID = rev.GetRevId();
if (!IsValidDocumentId(rev.GetDocId()) || revID == null) {
throw new CouchbaseLiteException(StatusCode.BadId);
}
if (revHistory.Count == 0) {
revHistory.Add(revID);
} else if (revID != revHistory[0]) {
throw new CouchbaseLiteException(StatusCode.BadId);
}
if (inRev.GetAttachments() != null) {
var updatedRev = inRev.CopyWithDocID(inRev.GetDocId(), inRev.GetRevId());
string prevRevID = revHistory.Count >= 2 ? revHistory[1] : null;
Status status = new Status();
if (!ProcessAttachmentsForRevision(updatedRev, prevRevID, status)) {
throw new CouchbaseLiteException(status.Code);
}
inRev = updatedRev;
}
StoreValidation validationBlock = null;
if (Shared != null && Shared.HasValues("validation", Name)) {
validationBlock = ValidateRevision;
}
var insertStatus = Storage.ForceInsert(inRev, revHistory, validationBlock, source);
if(insertStatus.IsError) {
throw new CouchbaseLiteException(insertStatus.Code);
}
}
internal RevisionInternal PutLocalRevision(RevisionInternal revision, string prevRevID)
{
var docID = revision.GetDocId();
if (!docID.StartsWith ("_local/", StringComparison.InvariantCultureIgnoreCase))
{
throw new CouchbaseLiteException(StatusCode.BadRequest);
}
if (!revision.IsDeleted())
{
// PUT:
string newRevID;
var json = EncodeDocumentJSON(revision);
if (prevRevID != null)
{
var generation = RevisionInternal.GenerationFromRevID(prevRevID);
if (generation == 0)
{
throw new CouchbaseLiteException(StatusCode.BadRequest);
}
newRevID = Sharpen.Extensions.ToString(++generation) + "-local";
var values = new ContentValues();
values["revid"] = newRevID;
values["json"] = json;
var whereArgs = new [] { docID, prevRevID };
try
{
var rowsUpdated = StorageEngine.Update("localdocs", values, "docid=? AND revid=?", whereArgs);
if (rowsUpdated == 0)
{
throw new CouchbaseLiteException(StatusCode.Conflict);
}
}
catch (SQLException e)
{
throw new CouchbaseLiteException(e, StatusCode.InternalServerError);
}
}
else
{
newRevID = "1-local";
var values = new ContentValues();
values["docid"] = docID;
values["revid"] = newRevID;
values["json"] = json;
try
{
StorageEngine.InsertWithOnConflict("localdocs", null, values, ConflictResolutionStrategy.Ignore);
}
catch (SQLException e)
{
throw new CouchbaseLiteException(e, StatusCode.InternalServerError);
}
}
return revision.CopyWithDocID(docID, newRevID);
}
else
{
// DELETE:
DeleteLocalDocument(docID, prevRevID);
return revision;
}
}
internal RevisionInternal RevisionByLoadingBody(RevisionInternal rev, Status outStatus)
{
// First check for no-op -- if we just need the default properties and already have them:
if (rev.GetSequence() != 0) {
var props = rev.GetProperties();
if (props != null && props.ContainsKey("_rev") && props.ContainsKey("_id")) {
if (outStatus != null) {
outStatus.Code = StatusCode.Ok;
}
return rev;
}
}
RevisionInternal nuRev = rev.CopyWithDocID(rev.GetDocId(), rev.GetRevId());
try {
LoadRevisionBody(nuRev);
} catch(CouchbaseLiteException e) {
if (outStatus != null) {
outStatus.Code = e.CBLStatus.Code;
}
nuRev = null;
}
return nuRev;
}
/// <summary>Stores a new (or initial) revision of a document.</summary>
/// <remarks>
/// Stores a new (or initial) revision of a document.
/// This is what's invoked by a PUT or POST. As with those, the previous revision ID must be supplied when necessary and the call will fail if it doesn't match.
/// </remarks>
/// <param name="oldRev">The revision to add. If the docID is null, a new UUID will be assigned. Its revID must be null. It must have a JSON body.
/// </param>
/// <param name="prevRevId">The ID of the revision to replace (same as the "?rev=" parameter to a PUT), or null if this is a new document.
/// </param>
/// <param name="allowConflict">If false, an error status 409 will be returned if the insertion would create a conflict, i.e. if the previous revision already has a child.
/// </param>
/// <param name="resultStatus">On return, an HTTP status code indicating success or failure.
/// </param>
/// <returns>A new RevisionInternal with the docID, revID and sequence filled in (but no body).
/// </returns>
/// <exception cref="Couchbase.Lite.CouchbaseLiteException"></exception>
internal RevisionInternal PutRevision(RevisionInternal oldRev, String prevRevId, Boolean allowConflict, Status resultStatus)
{
// prevRevId is the rev ID being replaced, or nil if an insert
var docId = oldRev.GetDocId();
var deleted = oldRev.IsDeleted();
if ((oldRev == null) || ((prevRevId != null) && (docId == null)) || (deleted && (docId == null)) || ((docId != null) && !IsValidDocumentId(docId)))
{
throw new CouchbaseLiteException(StatusCode.BadRequest);
}
BeginTransaction();
Cursor cursor = null;
var inConflict = false;
RevisionInternal winningRev = null;
RevisionInternal newRev = null;
// PART I: In which are performed lookups and validations prior to the insert...
var docNumericID = (docId != null) ? GetDocNumericID(docId) : 0;
var parentSequence = 0L;
string oldWinningRevID = null;
try
{
var oldWinnerWasDeletion = false;
var wasConflicted = false;
if (docNumericID > 0)
{
var outIsDeleted = new AList<bool>();
var outIsConflict = new AList<bool>();
try
{
oldWinningRevID = WinningRevIDOfDoc(docNumericID, outIsDeleted, outIsConflict);
oldWinnerWasDeletion |= outIsDeleted.Count > 0;
wasConflicted |= outIsConflict.Count > 0;
}
catch (Exception e)
{
Sharpen.Runtime.PrintStackTrace(e);
}
}
if (prevRevId != null)
{
// Replacing: make sure given prevRevID is current & find its sequence number:
if (docNumericID <= 0)
{
var msg = string.Format("No existing revision found with doc id: {0}", docId);
throw new CouchbaseLiteException(msg, StatusCode.NotFound);
}
parentSequence = GetSequenceOfDocument(docNumericID, prevRevId, !allowConflict);
if (parentSequence == 0)
{
// Not found: either a 404 or a 409, depending on whether there is any current revision
if (!allowConflict && ExistsDocumentWithIDAndRev(docId, null))
{
var msg = string.Format("Conflicts not allowed and there is already an existing doc with id: {0}", docId);
throw new CouchbaseLiteException(msg, StatusCode.Conflict);
}
else
{
var msg = string.Format("No existing revision found with doc id: {0}", docId);
throw new CouchbaseLiteException(msg, StatusCode.NotFound);
}
}
if (_validations != null && _validations.Count > 0)
{
// Fetch the previous revision and validate the new one against it:
var oldRevCopy = oldRev.CopyWithDocID(oldRev.GetDocId(), null);
var prevRev = new RevisionInternal(docId, prevRevId, false, this);
ValidateRevision(oldRevCopy, prevRev, prevRevId);
}
}
else
{
// Inserting first revision.
if (deleted && (docId != null))
{
// Didn't specify a revision to delete: 404 or a 409, depending
if (ExistsDocumentWithIDAndRev(docId, null))
{
throw new CouchbaseLiteException(StatusCode.Conflict);
}
else
{
throw new CouchbaseLiteException(StatusCode.NotFound);
}
}
// Validate:
ValidateRevision(oldRev, null, null);
if (docId != null)
{
// Inserting first revision, with docID given (PUT):
if (docNumericID <= 0)
{
// Doc doesn't exist at all; create it:
docNumericID = InsertDocumentID(docId);
if (docNumericID <= 0)
{
return null;
}
}
else
{
// Doc ID exists; check whether current winning revision is deleted:
if (oldWinnerWasDeletion)
{
prevRevId = oldWinningRevID;
parentSequence = GetSequenceOfDocument(docNumericID, prevRevId, false);
}
else
{
if (oldWinningRevID != null)
{
// The current winning revision is not deleted, so this is a conflict
throw new CouchbaseLiteException(StatusCode.Conflict);
}
}
}
}
else
{
// Inserting first revision, with no docID given (POST): generate a unique docID:
docId = Database.GenerateDocumentId();
docNumericID = InsertDocumentID(docId);
if (docNumericID <= 0)
{
return null;
}
}
}
// There may be a conflict if (a) the document was already in conflict, or
// (b) a conflict is created by adding a non-deletion child of a non-winning rev.
inConflict = wasConflicted
|| (!deleted && prevRevId != null && oldWinningRevID != null && !prevRevId.Equals(oldWinningRevID));
// PART II: In which we prepare for insertion...
// Get the attachments:
var attachments = GetAttachmentsFromRevision(oldRev);
// Bump the revID and update the JSON:
IList<byte> json = null;
if(!oldRev.IsDeleted()) //oldRev.GetProperties() != null && oldRev.GetProperties().Any())
{
json = EncodeDocumentJSON(oldRev).ToList();
if (json == null)
{
// bad or missing json
throw new CouchbaseLiteException(StatusCode.BadRequest);
}
if (json.Count() == 2 && json[0] == '{' && json[1] == '}')
{
json = null;
}
}
else
{
json = Encoding.UTF8.GetBytes("{}"); // NOTE.ZJG: Confirm w/ Traun. This prevents a null reference exception in call to InsertRevision below.
}
var newRevId = GenerateIDForRevision(oldRev, json, attachments, prevRevId);
newRev = oldRev.CopyWithDocID(docId, newRevId);
StubOutAttachmentsInRevision(attachments, newRev);
// Now insert the rev itself:
var newSequence = InsertRevision(newRev, docNumericID, parentSequence, true, (attachments.Count > 0), json);
if (newSequence == 0)
{
return null;
}
// Make replaced rev non-current:
try
{
var args = new ContentValues();
args["current"] = 0;
StorageEngine.Update("revs", args, "sequence=?", new[] { parentSequence.ToString() });
}
catch (SQLException e)
{
Log.E(Database.Tag, "Error setting parent rev non-current", e);
throw new CouchbaseLiteException(StatusCode.InternalServerError);
}
// Store any attachments:
if (attachments != null)
{
ProcessAttachmentsForRevision(attachments, newRev, parentSequence);
}
// Figure out what the new winning rev ID is:
winningRev = Winner(docNumericID, oldWinningRevID, oldWinnerWasDeletion, newRev);
// Success!
if (deleted)
{
resultStatus.SetCode(StatusCode.Ok);
}
else
{
resultStatus.SetCode(StatusCode.Created);
}
}
catch (SQLException e1)
{
Log.E(Tag, "Error putting revision", e1);
return null;
}
finally
{
if (cursor != null)
{
cursor.Close();
}
EndTransaction(resultStatus.IsSuccessful);
if (!string.IsNullOrEmpty(docId))
{
UnsavedRevisionDocumentCache.Remove(docId);
}
}
// EPILOGUE: A change notification is sent...
NotifyChange(newRev, winningRev, null, inConflict);
return newRev;
}
public RevisionInternal PutLocalRevision(RevisionInternal revision, string prevRevId, bool obeyMVCC)
{
var docId = revision.GetDocId();
if (!docId.StartsWith("_local/")) {
throw new CouchbaseLiteException("Local revision IDs must start with _local/", StatusCode.BadId);
}
if (revision.IsDeleted()) {
DeleteLocalRevision(docId, prevRevId, obeyMVCC);
return revision;
}
var result = default(RevisionInternal);
RunInTransaction(() =>
{
var json = Manager.GetObjectMapper().WriteValueAsString(revision.GetProperties(), true);
WithC4Raw(docId, "_local", doc =>
{
var generation = RevisionInternal.GenerationFromRevID(prevRevId);
if(obeyMVCC) {
if(prevRevId != null) {
if(prevRevId != (doc != null ? (string)doc->meta : null)) {
throw new CouchbaseLiteException(StatusCode.Conflict);
}
if(generation == 0) {
throw new CouchbaseLiteException(StatusCode.BadId);
}
} else if(doc != null) {
throw new CouchbaseLiteException(StatusCode.Conflict);
}
}
var newRevId = String.Format("{0}-local", ++generation);
ForestDBBridge.Check(err => Native.c4raw_put(Forest, "_local", docId, newRevId, json, err));
result = revision.CopyWithDocID(docId, newRevId);
});
return true;
});
return result;
}
/// <exception cref="Couchbase.Lite.CouchbaseLiteException">When attempting to add an invalid revision</exception>
internal void ForceInsert(RevisionInternal inRev, IList<string> revHistory, Uri source)
{
if (!IsOpen) {
throw new CouchbaseLiteException("DB is closed", StatusCode.DbError);
}
if (revHistory == null) {
revHistory = new List<string>(0);
}
var rev = inRev.CopyWithDocID(inRev.GetDocId(), inRev.GetRevId());
rev.SetSequence(0);
string revID = rev.GetRevId();
if (!Document.IsValidDocumentId(rev.GetDocId()) || revID == null) {
throw new CouchbaseLiteException(StatusCode.BadId);
}
if (revHistory.Count == 0) {
revHistory.Add(revID);
} else if (revID != revHistory[0]) {
throw new CouchbaseLiteException(StatusCode.BadId);
}
if (inRev.GetAttachments() != null) {
var updatedRev = inRev.CopyWithDocID(inRev.GetDocId(), inRev.GetRevId());
ProcessAttachmentsForRevision(updatedRev, revHistory.Skip(1).Take(revHistory.Count-1).ToList());
inRev = updatedRev;
}
StoreValidation validationBlock = null;
if (Shared != null && Shared.HasValues("validation", Name)) {
validationBlock = ValidateRevision;
}
Storage.ForceInsert(inRev, revHistory, validationBlock, source);
}
public RevisionInternal PutLocalRevision(RevisionInternal revision, string prevRevID
)
{
string docID = revision.GetDocId();
if (!docID.StartsWith("_local/"))
{
throw new CouchbaseLiteException(Status.BadRequest);
}
if (!revision.IsDeleted())
{
// PUT:
byte[] json = EncodeDocumentJSON(revision);
string newRevID;
if (prevRevID != null)
{
int generation = RevisionInternal.GenerationFromRevID(prevRevID);
if (generation == 0)
{
throw new CouchbaseLiteException(Status.BadRequest);
}
newRevID = Sharpen.Extensions.ToString(++generation) + "-local";
ContentValues values = new ContentValues();
values.Put("revid", newRevID);
values.Put("json", json);
string[] whereArgs = new string[] { docID, prevRevID };
try
{
int rowsUpdated = database.Update("localdocs", values, "docid=? AND revid=?", whereArgs
);
if (rowsUpdated == 0)
{
throw new CouchbaseLiteException(Status.Conflict);
}
}
catch (SQLException e)
{
throw new CouchbaseLiteException(e, Status.InternalServerError);
}
}
else
{
newRevID = "1-local";
ContentValues values = new ContentValues();
values.Put("docid", docID);
values.Put("revid", newRevID);
values.Put("json", json);
try
{
database.InsertWithOnConflict("localdocs", null, values, SQLiteStorageEngine.ConflictIgnore
);
}
catch (SQLException e)
{
throw new CouchbaseLiteException(e, Status.InternalServerError);
}
}
return revision.CopyWithDocID(docID, newRevID);
}
else
{
// DELETE:
DeleteLocalDocument(docID, prevRevID);
return revision;
}
}
public RevisionInternal PutRevision(RevisionInternal oldRev, string prevRevId, bool
allowConflict, Status resultStatus)
{
// prevRevId is the rev ID being replaced, or nil if an insert
string docId = oldRev.GetDocId();
bool deleted = oldRev.IsDeleted();
if ((oldRev == null) || ((prevRevId != null) && (docId == null)) || (deleted && (
docId == null)) || ((docId != null) && !IsValidDocumentId(docId)))
{
throw new CouchbaseLiteException(Status.BadRequest);
}
BeginTransaction();
Cursor cursor = null;
bool inConflict = false;
RevisionInternal winningRev = null;
RevisionInternal newRev = null;
//// PART I: In which are performed lookups and validations prior to the insert...
long docNumericID = (docId != null) ? GetDocNumericID(docId) : 0;
long parentSequence = 0;
string oldWinningRevID = null;
try
{
bool oldWinnerWasDeletion = false;
bool wasConflicted = false;
if (docNumericID > 0)
{
IList<bool> outIsDeleted = new AList<bool>();
IList<bool> outIsConflict = new AList<bool>();
try
{
oldWinningRevID = WinningRevIDOfDoc(docNumericID, outIsDeleted, outIsConflict);
if (outIsDeleted.Count > 0)
{
oldWinnerWasDeletion = true;
}
if (outIsConflict.Count > 0)
{
wasConflicted = true;
}
}
catch (Exception e)
{
Sharpen.Runtime.PrintStackTrace(e);
}
}
if (prevRevId != null)
{
// Replacing: make sure given prevRevID is current & find its sequence number:
if (docNumericID <= 0)
{
string msg = string.Format("No existing revision found with doc id: %s", docId);
throw new CouchbaseLiteException(msg, Status.NotFound);
}
string[] args = new string[] { System.Convert.ToString(docNumericID), prevRevId };
string additionalWhereClause = string.Empty;
if (!allowConflict)
{
additionalWhereClause = "AND current=1";
}
cursor = database.RawQuery("SELECT sequence FROM revs WHERE doc_id=? AND revid=? "
+ additionalWhereClause + " LIMIT 1", args);
if (cursor.MoveToNext())
{
parentSequence = cursor.GetLong(0);
}
if (parentSequence == 0)
{
// Not found: either a 404 or a 409, depending on whether there is any current revision
if (!allowConflict && ExistsDocumentWithIDAndRev(docId, null))
{
string msg = string.Format("Conflicts not allowed and there is already an existing doc with id: %s"
, docId);
throw new CouchbaseLiteException(msg, Status.Conflict);
}
else
{
string msg = string.Format("No existing revision found with doc id: %s", docId);
throw new CouchbaseLiteException(msg, Status.NotFound);
}
}
if (validations != null && validations.Count > 0)
{
// Fetch the previous revision and validate the new one against it:
RevisionInternal prevRev = new RevisionInternal(docId, prevRevId, false, this);
ValidateRevision(oldRev, prevRev);
}
// Make replaced rev non-current:
ContentValues updateContent = new ContentValues();
updateContent.Put("current", 0);
database.Update("revs", updateContent, "sequence=" + parentSequence, null);
}
else
{
// Inserting first revision.
if (deleted && (docId != null))
{
// Didn't specify a revision to delete: 404 or a 409, depending
if (ExistsDocumentWithIDAndRev(docId, null))
{
throw new CouchbaseLiteException(Status.Conflict);
}
else
{
throw new CouchbaseLiteException(Status.NotFound);
}
}
// Validate:
ValidateRevision(oldRev, null);
if (docId != null)
{
// Inserting first revision, with docID given (PUT):
if (docNumericID <= 0)
{
// Doc doesn't exist at all; create it:
docNumericID = InsertDocumentID(docId);
if (docNumericID <= 0)
{
return null;
}
}
else
{
// Doc ID exists; check whether current winning revision is deleted:
if (oldWinnerWasDeletion == true)
{
prevRevId = oldWinningRevID;
parentSequence = GetSequenceOfDocument(docNumericID, prevRevId, false);
}
else
{
if (oldWinningRevID != null)
{
// The current winning revision is not deleted, so this is a conflict
throw new CouchbaseLiteException(Status.Conflict);
}
}
}
}
else
{
// Inserting first revision, with no docID given (POST): generate a unique docID:
docId = Database.GenerateDocumentId();
docNumericID = InsertDocumentID(docId);
if (docNumericID <= 0)
{
return null;
}
}
}
// There may be a conflict if (a) the document was already in conflict, or
// (b) a conflict is created by adding a non-deletion child of a non-winning rev.
inConflict = wasConflicted || (!deleted && prevRevId != null && oldWinningRevID !=
null && !prevRevId.Equals(oldWinningRevID));
//// PART II: In which insertion occurs...
// Get the attachments:
IDictionary<string, AttachmentInternal> attachments = GetAttachmentsFromRevision(
oldRev);
// Bump the revID and update the JSON:
string newRevId = GenerateNextRevisionID(prevRevId);
byte[] data = null;
if (!oldRev.IsDeleted())
{
data = EncodeDocumentJSON(oldRev);
if (data == null)
{
// bad or missing json
throw new CouchbaseLiteException(Status.BadRequest);
}
}
newRev = oldRev.CopyWithDocID(docId, newRevId);
StubOutAttachmentsInRevision(attachments, newRev);
// Now insert the rev itself:
long newSequence = InsertRevision(newRev, docNumericID, parentSequence, true, data
);
if (newSequence == 0)
{
return null;
}
// Store any attachments:
if (attachments != null)
{
ProcessAttachmentsForRevision(attachments, newRev, parentSequence);
}
// Figure out what the new winning rev ID is:
winningRev = Winner(docNumericID, oldWinningRevID, oldWinnerWasDeletion, newRev);
// Success!
if (deleted)
{
resultStatus.SetCode(Status.Ok);
}
else
{
resultStatus.SetCode(Status.Created);
}
}
catch (SQLException e1)
{
Log.E(Database.Tag, "Error putting revision", e1);
return null;
}
finally
{
if (cursor != null)
{
cursor.Close();
}
EndTransaction(resultStatus.IsSuccessful());
}
//// EPILOGUE: A change notification is sent...
NotifyChange(newRev, winningRev, null, inConflict);
return newRev;
}
