@Override
public BasicDocumentRevision updateLocalDocument(
String docId, String prevRevId, final DocumentBody body) {
Preconditions.checkState(this.isOpen(), "Database is closed");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(docId), "Input document id can not be empty");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(prevRevId), "Input previous revision id can not be empty");
Preconditions.checkNotNull(body, "Input document body can not be null");
CouchUtils.validateRevisionId(prevRevId);
DocumentRevision preRevision = this.getLocalDocument(docId, prevRevId);
this.sqlDb.beginTransaction();
try {
String newRevId = CouchUtils.generateNextLocalRevisionId(prevRevId);
ContentValues values = new ContentValues();
values.put("revid", newRevId);
values.put("json", body.asBytes());
String[] whereArgs = new String[] {docId, prevRevId};
int rowsUpdated = this.sqlDb.update("localdocs", values, "docid=? AND revid=?", whereArgs);
if (rowsUpdated == 1) {
this.sqlDb.setTransactionSuccessful();
return this.getLocalDocument(docId, newRevId);
} else {
throw new IllegalStateException("Error updating local docs: " + preRevision);
}
} finally {
this.sqlDb.endTransaction();
}
}
@Override
public void deleteDocument(String docId, String prevRevId) throws ConflictException {
Preconditions.checkState(this.isOpen(), "Database is closed");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(docId), "Input document id can not be empty");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(prevRevId), "Input previous revision id can not be empty");
CouchUtils.validateRevisionId(prevRevId);
DocumentDeleted documentDeleted = null;
this.sqlDb.beginTransaction();
try {
BasicDocumentRevision preRevision = this.getDocument(docId, prevRevId);
if (preRevision == null) {
throw new IllegalArgumentException("The document trying to update does not exist.");
}
DocumentRevisionTree revisionTree = this.getAllRevisionsOfDocument(docId);
if (revisionTree == null) {
throw new IllegalArgumentException("Document does not exist for id: " + docId);
} else if (!revisionTree.leafRevisionIds().contains(prevRevId)) {
throw new ConflictException("Revision to be deleted is not a leaf node:" + prevRevId);
}
if (!preRevision.isDeleted()) {
this.checkOffPreviousWinnerRevisionStatus(preRevision);
String newRevisionId = CouchUtils.generateNextRevisionId(preRevision.getRevision());
// Previous revision to be deleted could be winner revision ("current" == true),
// or a non-winner leaf revision ("current" == false), the new inserted
// revision must have the same flag as it previous revision.
// Deletion of non-winner leaf revision is mainly used when resolving
// conflicts.
this.insertRevision(
preRevision.getInternalNumericId(),
newRevisionId,
preRevision.getSequence(),
true,
preRevision.isCurrent(),
JSONUtils.EMPTY_JSON,
false);
BasicDocumentRevision newRevision = this.getDocument(preRevision.getId(), newRevisionId);
documentDeleted = new DocumentDeleted(preRevision, newRevision);
}
// Very tricky! Must call setTransactionSuccessful() even no change
// to the db within this method. This is to allow this method to be
// nested to other outer transaction, otherwise, the outer transaction
// will rollback.
this.sqlDb.setTransactionSuccessful();
} finally {
this.sqlDb.endTransaction();
if (documentDeleted != null) {
eventBus.post(documentDeleted);
}
}
}
private boolean checkRevisionIsInCorrectOrder(List<String> revisionHistory) {
for (int i = 0; i < revisionHistory.size() - 1; i++) {
CouchUtils.validateRevisionId(revisionHistory.get(i));
int l = CouchUtils.generationFromRevId(revisionHistory.get(i));
int m = CouchUtils.generationFromRevId(revisionHistory.get(i + 1));
if (l >= m) {
return false;
}
}
return true;
}
@Override
public BasicDocumentRevision updateDocument(
String docId, String prevRevId, final DocumentBody body) throws ConflictException {
Preconditions.checkState(this.isOpen(), "Database is closed");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(docId), "Input document id can not be empty");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(prevRevId), "Input previous revision id can not be empty");
Preconditions.checkNotNull(body, "Input document body can not be null");
this.validateDBBody(body);
CouchUtils.validateRevisionId(prevRevId);
DocumentUpdated documentUpdated = null;
this.sqlDb.beginTransaction();
try {
BasicDocumentRevision preRevision = this.getDocument(docId, prevRevId);
if (preRevision == null) {
throw new IllegalArgumentException("The document trying to update does not exist.");
}
if (!preRevision.isCurrent()) {
throw new ConflictException("Revision to be updated is not current revision.");
}
this.checkOffPreviousWinnerRevisionStatus(preRevision);
String newRevisionId = this.insertNewWinnerRevision(body, preRevision);
BasicDocumentRevision newRevision = this.getDocument(preRevision.getId(), newRevisionId);
this.sqlDb.setTransactionSuccessful();
documentUpdated = new DocumentUpdated(preRevision, newRevision);
return newRevision;
} finally {
this.sqlDb.endTransaction();
if (documentUpdated != null) {
eventBus.post(documentUpdated);
}
}
}
@Override
public void forceInsert(
DocumentRevision rev, List<String> revisionHistory, Map<String, Object> attachments) {
Preconditions.checkState(this.isOpen(), "Database is closed");
Preconditions.checkNotNull(rev, "Input document revision can not be null");
Preconditions.checkNotNull(revisionHistory, "Input revision history must not be null");
Preconditions.checkArgument(
revisionHistory.size() > 0, "Input revision history must not be empty");
Preconditions.checkArgument(
checkCurrentRevisionIsInRevisionHistory(rev, revisionHistory),
"Current revision must exist in revision history.");
Preconditions.checkArgument(
checkRevisionIsInCorrectOrder(revisionHistory), "Revision history must be in right order.");
CouchUtils.validateDocumentId(rev.getId());
CouchUtils.validateRevisionId(rev.getRevision());
Log.v(
LOG_TAG,
"forceInsert(): " + rev.toString() + ",\n" + JSONUtils.toPrettyJson(revisionHistory));
DocumentCreated documentCreated = null;
DocumentUpdated documentUpdated = null;
boolean ok = true;
this.sqlDb.beginTransaction();
try {
long seq = 0;
// sequence here is -1, but we need it to insert the attachment - also might be wanted by
// subscribers
if (this.containsDocument(rev.getId())) {
seq = doForceInsertExistingDocumentWithHistory(rev, revisionHistory);
rev.initialiseSequence(seq);
// TODO fetch the parent doc?
documentUpdated = new DocumentUpdated(null, rev);
} else {
seq = doForceInsertNewDocumentWithHistory(rev, revisionHistory);
rev.initialiseSequence(seq);
documentCreated = new DocumentCreated(rev);
}
// now deal with any attachments
if (attachments != null) {
for (String att : attachments.keySet()) {
String data = (String) ((Map<String, Object>) attachments.get(att)).get("data");
InputStream is = new Base64InputStream(new ByteArrayInputStream(data.getBytes()));
String type = (String) ((Map<String, Object>) attachments.get(att)).get("content_type");
// inline attachments are automatically decompressed, so we don't have to worry about that
UnsavedStreamAttachment ufa = new UnsavedStreamAttachment(is, att, type);
boolean result = false;
try {
PreparedAttachment preparedAttachment =
new PreparedAttachment(ufa, this.attachmentManager.attachmentsDir);
result = this.attachmentManager.addAttachment(preparedAttachment, rev);
} catch (IOException e) {
Log.e(LOG_TAG, "IOException when preparing attachment " + ufa + ": " + e);
}
if (!result) {
Log.e(
LOG_TAG,
"There was a problem adding the attachment "
+ ufa
+ " to the datastore; not force inserting this document: "
+ rev);
ok = false;
break;
}
}
}
if (ok) {
this.sqlDb.setTransactionSuccessful();
}
} finally {
this.sqlDb.endTransaction();
if (ok) {
if (documentCreated != null) {
eventBus.post(documentCreated);
} else if (documentUpdated != null) {
eventBus.post(documentUpdated);
}
}
}
}