A Java client for TiDB/TiKV. It is supposed to:
- Communicate via gRPC
- Talk to Placement Driver searching for a region
- Talk to TiKV for reading/writing data and the resulted data is encoded/decoded just like what we do in TiDB.
- Talk to Coprocessor for calculation pushdown
The following command can install dependencies for you.
mvn package
Alternatively, you can use bazel
for much faster build. When you try this approach, you should run git submodule update --init --recursive
before you build project.
Making a uber jar:
make uber_jar
run Main class:
make run
run test cases:
make test
this project is designed to hook with pd
and tikv
which you can find in PingCap
github page.
When you work with this project, you have to communicate with pd
and tikv
. There is a script taking care of this. By executing the following commands, pd
and tikv
can be executed on background.
cd scripts
make pd
make tikv
Since it's not quite complete, a usage sample for now can be given is:
TiConfiguration conf = TiConfiguration.createDefault("127.0.0.1:2379");
TiSession session = TiSession.create(conf);
Catalog cat = session.getCatalog();
TiDBInfo db = cat.getDatabase("test");
TiTableInfo table = cat.getTable(db, "t2");
....
Snapshot snapshot = session.createSnapshot();
Iterator<Row> it = snapshot.newSelect(table)
.addRange(TiRange.create(0L, Long.MAX_VALUE))
.doSelect();
while (it.hasNext()) {
Row r = it.next();
long val = r.getLong(0);
}
Contributions are welcomed. Here is a TODO and you might contact maxiaoyu@pingcap.com if needed.
Apache 2.0 license. See the LICENSE file for details.