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[CF] Handle failure in WriteBatch::Handler

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Summary:
* Add ColumnFamilyHandle::GetID() function. Client needs to know column family's ID to be able to construct WriteBatch
* Handle WriteBatch::Handler failure gracefully. Since WriteBatch is not a very smart function (it takes raw CF id), client can add data to WriteBatch for column family that doesn't exist. In that case, we need to gracefully return failure status from DB::Write(). To do that, I added a return Status to WriteBatch functions PutCF, DeleteCF and MergeCF.

Test Plan: Added test to column_family_test

Reviewers: dhruba, haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D16323
This commit is contained in:
Igor Canadi
2014-02-25 17:30:54 -08:00
parent 944ff673d6
commit 8b7ab9951c
10 changed files with 98 additions and 48 deletions
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2
include/rocksdb/db.h
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@@ -27,6 +27,8 @@ using std::unique_ptr;
class ColumnFamilyHandle {
public:
virtual ~ColumnFamilyHandle() {}
virtual uint32_t GetID() const = 0;
};
extern const std::string default_column_family_name;

22
include/rocksdb/write_batch.h
View File

@@ -88,29 +88,41 @@ class WriteBatch {
// default implementation will just call Put without column family for
// backwards compatibility. If the column family is not default,
// the function is noop
virtual void PutCF(uint32_t column_family_id, const Slice& key,
const Slice& value) {
virtual Status PutCF(uint32_t column_family_id, const Slice& key,
const Slice& value) {
if (column_family_id == 0) {
// Put() historically doesn't return status. We didn't want to be
// backwards incompatible so we didn't change the return status
// (this is a public API). We do an ordinary get and return Status::OK()
Put(key, value);
return Status::OK();
}
return Status::InvalidArgument(
"non-default column family and PutCF not implemented");
}
virtual void Put(const Slice& key, const Slice& value);
// Merge and LogData are not pure virtual. Otherwise, we would break
// existing clients of Handler on a source code level. The default
// implementation of Merge simply throws a runtime exception.
virtual void MergeCF(uint32_t column_family_id, const Slice& key,
const Slice& value) {
virtual Status MergeCF(uint32_t column_family_id, const Slice& key,
const Slice& value) {
if (column_family_id == 0) {
Merge(key, value);
return Status::OK();
}
return Status::InvalidArgument(
"non-default column family and MergeCF not implemented");
}
virtual void Merge(const Slice& key, const Slice& value);
// The default implementation of LogData does nothing.
virtual void LogData(const Slice& blob);
virtual void DeleteCF(uint32_t column_family_id, const Slice& key) {
virtual Status DeleteCF(uint32_t column_family_id, const Slice& key) {
if (column_family_id == 0) {
Delete(key);
return Status::OK();
}
return Status::InvalidArgument(
"non-default column family and DeleteCF not implemented");
}
virtual void Delete(const Slice& key);
// Continue is called by WriteBatch::Iterate. If it returns false,