This PR adds scripting ability to BE, as a way to increase system observability, making testing, debugging and online hot fix issues easier. The script engine uses wren script language and wrenbind17 binding util(it's a small OO language).
Currently, only a small faction of BE objects & methods are bonded, mainly focusing on StorageEngine(Tablets, Rowsets, TabletUpates).
Will add more binding for rocksdb metadata, thread/stack dumps, memory/cpu profiling utils in the future.
Sample uses cases:
```
mysql> admin execute on 10004 '
'> var ts = StorageEngine.get_tablet_infos(-1,-1)
'> for (t in ts) {
'> System.print("%(t.tablet_id) %(t.data_size)")
'> }
'> ';
Query OK, 0 rows affected (0.01 sec)
10009 0
10011 0
10013 0
...
mysql> admin execute on 10004 '
'> var t = StorageEngine.get_tablet(11005)
'> System.print("info: %(t.updates().toPB().toString())")
'> ';
Query OK, 0 rows affected (0.00 sec)
info: {"versions":[{"version":{"major":"3","minor":"1"},"creationTime":"1679897711","rowsets":[2],"compaction":{"startVersion":{"major":"3","minor":"0"},"inputs":[0,1],"outputs":[2]}},{"version":{"major":"4","minor":"0"},"creationTime":"1679900665","rowsets":[2,3],"deltas":[3]},{"version":{"major":"5","minor":"0"},"creationTime":"1679900666","rowsets":[2,3,4],"deltas":[4]},{"version":{"major":"6","minor":"0"},"creationTime":"1679900667","rowsets":[2,3,4,5],"deltas":[5]},{"version":{"major":"7","minor":"0"},"creationTime":"1679900667","rowsets":[2,3,4,5,6],"deltas":[6]},{"version":{"major":"8","minor":"0"},"creationTime":"1679900667","rowsets":[2,3,4,5,6,7],"deltas":[7]},{"version":{"major":"9","minor":"0"},"creationTime":"1679900667","rowsets":[2,3,4,5,6,7,8],"deltas":[8]},{"version":{"major":"10","minor":"0"},"creationTime":"1679900668","rowsets":[2,3,4,5,6,7,8,9],"deltas":[9]},{"version":{"major":"11","minor":"0"},"creationTime":"1679900668","rowsets":[2,3,4,5,6,7,8,9,10],"deltas":[10]},{"version":{"major":"12","minor":"0"},"creationTime":"1679900668","rowsets":[2,3,4,5,6,7,8,9,10,11],"deltas":[11]},{"version":{"major":"13","minor":"0"},"creationTime":"1679900668","rowsets":[2,3,4,5,6,7,8,9,10,11,12],"deltas":[12]},{"version":{"major":"13","minor":"1"},"creationTime":"1679900708","rowsets":[13],"compaction":{"startVersion":{"major":"13","minor":"0"},"inputs":[2,3,4,5,6,7,8,9,10,11,12],"outputs":[13]}}],"applyVersion":{"major":"13","minor":"1"},"nextRowsetId":14,"nextLogId":"28"}
mysql> admin execute on 10004 '
'> for (dir in StorageEngine.get_data_dirs()) {
'> System.print("dir: %(dir.path()) rocksdb: %(dir.get_meta().sst_file_size())")
'> var result = dir.get_meta().compact().toString()
'> System.print("compact %(result) size: %(dir.get_meta().sst_file_size())")
'> }
'> ';
Query OK, 0 rows affected (0.00 sec)
dir: /home/decster/projects/starrocks/localrun/be/storage rocksdb: 156484
compact OK size: 12708
```
Signed-off-by: Binglin Chang <decstery@gmail.com>
8d83da4fdb