mirror of https://github.com/facebook/rocksdb.git
385 lines
8.8 KiB
Thrift
385 lines
8.8 KiB
Thrift
#!/usr/local/bin/thrift --gen cpp
|
|
|
|
namespace java Tleveldb
|
|
namespace cpp Tleveldb
|
|
namespace rb Tleveldb
|
|
namespace py Tleveldb
|
|
namespace perl Tleveldb
|
|
|
|
// Types
|
|
typedef binary Text
|
|
typedef binary Bytes
|
|
|
|
// A basic object needed for storing keys and values
|
|
struct Slice {
|
|
1:Text data;
|
|
2:i32 size
|
|
}
|
|
|
|
// Different compression types supported
|
|
enum CompressionType {
|
|
kNoCompression = 0x0,
|
|
kSnappyCompression = 0x1
|
|
}
|
|
|
|
// Error codes
|
|
enum Code {
|
|
kOk = 0,
|
|
kNotFound = 1,
|
|
kCorruption = 2,
|
|
kNotSupported = 3,
|
|
kInvalidArgument = 4,
|
|
kIOError = 5,
|
|
kEnd = 6
|
|
}
|
|
|
|
// A range object
|
|
struct Range {
|
|
1:Slice start; // Included in the range
|
|
2:Slice limit // Not included in the range
|
|
}
|
|
|
|
// Options to creating a database
|
|
struct DBOptions {
|
|
1:bool create_if_missing;
|
|
2:bool error_if_exists;
|
|
3:i32 write_buffer_size;
|
|
4:i32 max_open_files;
|
|
5:i32 block_size;
|
|
6:i32 block_restart_interval;
|
|
7:CompressionType compression,
|
|
8:i32 num_levels,
|
|
9:i32 level0_file_num_compaction_trigger,
|
|
10:i32 level0_slowdown_writes_trigger,
|
|
11:i32 level0_stop_writes_trigger,
|
|
12:i32 target_file_size_base,
|
|
13:i32 target_file_size_multiplier,
|
|
14:i32 max_bytes_for_level_base,
|
|
15:i32 max_bytes_for_level_multiplier,
|
|
16:i32 max_grandparent_overlap_factor,
|
|
17:bool disableDataSync
|
|
}
|
|
|
|
// Options for writing
|
|
struct WriteOptions {
|
|
1:bool sync,
|
|
2:bool disableWAL
|
|
}
|
|
|
|
struct Snapshot {
|
|
1:i64 snapshotid // server generated
|
|
}
|
|
|
|
// Options for reading. If you do not have a
|
|
// snapshot, set snapshot.snapshotid = 0
|
|
struct ReadOptions {
|
|
1:bool verify_checksums;
|
|
2:bool fill_cache,
|
|
3:Snapshot snapshot
|
|
}
|
|
|
|
// Represents a database object
|
|
struct DBHandle {
|
|
1:Text dbname //name of the database
|
|
}
|
|
|
|
struct Iterator {
|
|
1:i64 iteratorid // server generated
|
|
}
|
|
|
|
// flags for the iterator
|
|
enum IteratorType {
|
|
seekToFirst = 0,
|
|
seekToLast = 1,
|
|
seekToKey = 2
|
|
}
|
|
|
|
struct kv {
|
|
1:Slice key;
|
|
2:Slice value
|
|
}
|
|
|
|
// Return a single value from the Get call
|
|
struct ResultItem {
|
|
1:Code status;
|
|
2:Slice value
|
|
}
|
|
|
|
// Return a key,value from a Scan call
|
|
struct ResultPair {
|
|
1:Code status;
|
|
2:kv keyvalue
|
|
}
|
|
|
|
// Snapshot result
|
|
struct ResultSnapshot {
|
|
1:Code status;
|
|
2:Snapshot snapshot
|
|
}
|
|
|
|
// Iterator result
|
|
struct ResultIterator {
|
|
1:Code status;
|
|
2:Iterator iterator
|
|
}
|
|
|
|
exception LeveldbException {
|
|
1:Text message,
|
|
2:Code errorCode
|
|
}
|
|
|
|
// The Database service
|
|
service DB {
|
|
|
|
// opens the database. The database name cannot have "/"
|
|
// in its name.
|
|
DBHandle Open(1:Text dbname, 2:DBOptions dboptions)
|
|
throws (1:LeveldbException se),
|
|
|
|
// closes the database
|
|
Code Close(1:DBHandle dbhandle, 2:Text dbname),
|
|
|
|
// puts a key in the database
|
|
Code Put(1:DBHandle dbhandle, 2:kv keyvalue, 3:WriteOptions options),
|
|
|
|
// deletes a key from the database
|
|
Code Delete(1:DBHandle dbhandle, 2:Slice key, 3:WriteOptions options),
|
|
|
|
// writes batch of keys into the database
|
|
Code Write(1:DBHandle dbhandle, 2:list<kv> batch, 3:WriteOptions options),
|
|
|
|
// fetch a key from the DB.
|
|
// ResultItem.status == kNotFound means key is non existant
|
|
// ResultItem.status == kOk means key is found
|
|
ResultItem Get(1:DBHandle dbhandle, 2:Slice inputkey,
|
|
3:ReadOptions options),
|
|
|
|
// start iteration over a set of keys. If iteratorType.seekToFirst
|
|
// is set, then position the iterator at the first key in the source.
|
|
// If iteratorType.seekToLast is set, then position at the last key in the
|
|
// source. If iteratorType.seekToKey is set, then position at the first
|
|
// key in the source that is at or past target.
|
|
// If any two of iteratorType.seekToFirst & iteratorType.seekToLast
|
|
// and iteratorType.seekToKey are set, then error.
|
|
// If either iteratorType.seekToFirst or iteratorType.seekToLast is set,
|
|
// then target is not used.
|
|
ResultIterator NewIterator(1:DBHandle dbhandle, 2:ReadOptions options,
|
|
3:IteratorType iteratorType,
|
|
4:Slice target),
|
|
|
|
// Release resources associated with an iterator allocated previously
|
|
// via a call to NewIterator. The call to this method may be skipped
|
|
// if the iterator had already traversed all the keys in the specified
|
|
// range. If the application wants to terminate a scan before processing
|
|
// all the resulting keys, then it is essential to invoke this method.
|
|
Code DeleteIterator(1:DBHandle dbhandle, 2:Iterator iterator),
|
|
|
|
// Return the previous/next from this iteration
|
|
ResultPair GetNext(1:DBHandle dbhandle, 2:Iterator iterator),
|
|
ResultPair GetPrev(1:DBHandle dbhandle, 2:Iterator iterator),
|
|
|
|
// Create snapshot.
|
|
ResultSnapshot GetSnapshot(1:DBHandle dbhandle),
|
|
|
|
// Release snapshots
|
|
Code ReleaseSnapshot(1:DBHandle dbhandle, 2:Snapshot snapshot),
|
|
|
|
// compact a range of keys
|
|
// begin.size == 0 to start at a range earlier than the first existing key
|
|
// end.size == 0 to end at a range later than the last existing key
|
|
Code CompactRange(1:DBHandle dbhandle, 2:Slice start, 3:Slice endhere),
|
|
}
|
|
|
|
// ****************** FACEBOOK specific stuff ********************
|
|
|
|
//
|
|
// An IOError exception from an assoc operation
|
|
//
|
|
exception IOError {
|
|
1:string message
|
|
}
|
|
|
|
//
|
|
// Visibility state for assoc
|
|
//
|
|
enum AssocVisibility
|
|
{
|
|
VISIBLE = 0, // live object, include in lookups and count
|
|
DELETED = 1, // exclude from lookup queries and count, ok to
|
|
// delete permanently from persistent store
|
|
UNUSED1 = 2, // not used
|
|
HIDDEN = 3, // exclude from lookup queries and count
|
|
UNUSED2 = 4, // not used
|
|
HARD_DELETE = 4 // deleted by calling expunge, will be swept
|
|
// as soon as possible
|
|
}
|
|
|
|
/**
|
|
* Holds the assoc get result of a id2
|
|
*/
|
|
struct TaoAssocGetResult {
|
|
/** id2 of assoc */
|
|
1:i64 id2,
|
|
|
|
/** id1 type of assoc */
|
|
2:i64 id1Type,
|
|
|
|
/** id2 type of assoc */
|
|
3:i64 id2Type,
|
|
|
|
/** time stamp of the assoc */
|
|
4:i64 time,
|
|
|
|
/** version of the data blob */
|
|
5:i64 dataVersion,
|
|
|
|
/** serialized data of the asoc */
|
|
6:Text data,
|
|
}
|
|
|
|
//
|
|
// Service
|
|
//
|
|
service AssocService {
|
|
|
|
/**
|
|
* TAO Assoc Put operation.
|
|
* Note that currently the argument visibility has no effect.
|
|
*
|
|
* @if update_count is true, then return the updated count for this assoc
|
|
* @if update_count is false, then return 0
|
|
* @return negative number if failure
|
|
*/
|
|
i64 taoAssocPut(
|
|
/** name of table */
|
|
1:Text tableName,
|
|
|
|
/** type assoc */
|
|
2:i64 assocType,
|
|
|
|
/** id1 of assoc */
|
|
3:i64 id1,
|
|
|
|
/** id2 of assoc */
|
|
4:i64 id2,
|
|
|
|
/** id1Type of assoc */
|
|
5:i64 id1Type,
|
|
|
|
/** id2Type of assoc */
|
|
6:i64 id2Type,
|
|
|
|
/** timestamp of assoc */
|
|
7:i64 timestamp,
|
|
|
|
/** visibility */
|
|
8:AssocVisibility visibility,
|
|
|
|
/** whether to keep the count or not */
|
|
9:bool update_count,
|
|
|
|
/** version of the data blob */
|
|
10:i64 dataVersion,
|
|
|
|
/** serialized data of assoc */
|
|
11:Text data,
|
|
|
|
/** wormhole comment */
|
|
12:Text wormhole_comment
|
|
) throws (1:IOError io)
|
|
|
|
/**
|
|
* TAO Assoc Delete operation.
|
|
*
|
|
* @return the updated count for this assoc
|
|
*/
|
|
i64 taoAssocDelete(
|
|
/** name of table */
|
|
1:Text tableName,
|
|
|
|
/** type assoc */
|
|
2:i64 assocType,
|
|
|
|
/** id1 of assoc */
|
|
3:i64 id1,
|
|
|
|
/** id2 of assoc */
|
|
4:i64 id2,
|
|
|
|
/** visibility flag for this delete */
|
|
5:AssocVisibility visibility,
|
|
|
|
/** whether to keep the count or not */
|
|
6:bool update_count,
|
|
|
|
/** wormhole comment */
|
|
7:Text wormhole_comment
|
|
) throws (1:IOError io)
|
|
|
|
/**
|
|
* TAO Assoc RangeGet operation.
|
|
* Obtain assocs in bewteen start_time and end_time in reverse time order.
|
|
* The range check is inclusive: start_time >= time && time >= end_time.
|
|
* And yes, start_time >= end_time because this range scan is a backward
|
|
* scan in time, starting with most recent time and scanning backwards
|
|
* for the most recent n assocs.
|
|
*/
|
|
list<TaoAssocGetResult> taoAssocRangeGet(
|
|
/** name of table */
|
|
1:Text tableName,
|
|
|
|
/** type of assoc */
|
|
2:i64 assocType,
|
|
|
|
/** id1 of assoc */
|
|
3:i64 id1,
|
|
|
|
/** maximum timestamp of assocs to retrieve */
|
|
4:i64 start_time,
|
|
|
|
/** minimum timestamp of assocs to retrieve */
|
|
5:i64 end_time,
|
|
|
|
/** number of assocs to skip from start */
|
|
6:i64 offset,
|
|
|
|
/** max number of assocs (columns) returned */
|
|
7:i64 limit
|
|
) throws (1:IOError io)
|
|
|
|
/**
|
|
* TAO Assoc Get operation.
|
|
*/
|
|
list<TaoAssocGetResult> taoAssocGet(
|
|
/** name of table */
|
|
1:Text tableName,
|
|
|
|
/** type of assoc */
|
|
2:i64 assocType,
|
|
|
|
/** id1 of assoc */
|
|
3:i64 id1,
|
|
|
|
/** list of id2 need to be fetch */
|
|
4:list<i64> id2s
|
|
) throws (1:IOError io)
|
|
|
|
/**
|
|
* TAO Assoc Count Get operation.
|
|
* Returns the number of assocs for given id1 and assoc type
|
|
*/
|
|
i64 taoAssocCount(
|
|
/** name of table */
|
|
1:Text tableName,
|
|
|
|
/** type of assoc */
|
|
2:i64 assocType,
|
|
|
|
/** id1 of assoc */
|
|
3:i64 id1,
|
|
|
|
) throws (1:IOError io)
|
|
}
|
|
|
|
|