Ti-Client in Java [Under Construction]
NOTES: For now it works with only TiKV branch disksing/grpc instead of official release.
A Java client for TiDB/TiKV. It suppose to:
- Communicate via gRPC
- Talk to Placement Driver searching for a region
- Talk to TiKV reading / writing data the format/encoding as a real TiDB.
- Talk Coprocessor for calculation pushdown
How to build
The following command can install dependencies for you.
mvn package
Alternatively, you can use bazel for much faster build.
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.
For the sake of saving your and our time, we submoudle these already. The following command can download them.
git submodule update --init --recursive
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
How to use for now
Since it's not quite complete, a usage sample for now can be given is:
TiConfiguration conf = TiConfiguration.createDefault(ImmutableList.of("127.0.0.1:" + 2379));
TiCluster cluster = TiCluster.getCluster(conf);
Catalog cat = cluster.getCatalog();
TiDBInfo db = cat.getDatabase("test");
TiTableInfo table = cat.getTable(db, "t2");
....
Snapshot snapshot = cluster.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);
}TODO
Contributions are welcomed. Here is a TODO and you might contact maxiaoyu@pingcap.com if needed.
License
Apache 2.0 license. See the LICENSE file for details.