jetcd - A Java Client for etcd

jetcd is the official java client for etcdv3.

Note: jetcd is work-in-progress and may break backward compatibility.

Java Versions

Java 8 or above is required.

Download

Maven

<dependency>
  <groupId>com.coreos</groupId>
  <artifactId>jetcd-core</artifactId>
  <version>0.0.1</version>
</dependency>

Development snapshots are available in Sonatypes's snapshot repository.

Gradle

dependencies {
    compile 'com.coreos:jetcd-core:0.0.1'
}

Manual

Download latest jetcd-core jar from Maven and all its dependent jars:

grpc-core-1.5.0.jar grpc-netty-1.5.0.jar grpc-protobuf-1.5.0.jar grpc-stub-1.5.0.jar slf4j-api-1.7.2.jar

Usage

// create client
Client client = Client.builder().endpoints("http://localhost:2379").build();
KV kvClient = client.getKVClient();

ByteSequence key = ByteSequence.fromString("test_key");
ByteSequence value = ByteSequence.fromString("test_value");

// put the key-value
kvClient.put(key, value).get();
// get the CompletableFuture
CompletableFuture<GetResponse> getFuture = kvClient.get(key);
// get the value from CompletableFuture
GetResponse response = getFuture.get();
// delete the key
DeleteResponse deleteRangeResponse = kvClient.delete(key).get();

For full etcd v3 API, plesase refer to API_Reference.

Examples

The examples are standalone projects that show usage of jetcd.

Versioning

The project follows Semantic Versioning.

The current major version is zero (0.y.z). Anything may change at any time. The public API should not be considered stable.

Running tests

The project is to be tested against a three node etcd setup, launched by the scripts/run_etcd.sh shell script:

./etc/scripts/run_etcd.sh

It should work on either macOS or Linux.

Note: Make sure you don't have a default etcd running on your system! The script uses the default port 2379 for the first node, which fails to launch if that port is already taken.

mvn test
...

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running TestSuite
Feb 23, 2017 6:40:18 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@48a242ce] Created with target etcd
Feb 23, 2017 6:40:18 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@20d3d15a] Created with target etcd
Feb 23, 2017 6:40:18 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@548a102f] Created with target etcd
Feb 23, 2017 6:40:18 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@17c386de] Created with target etcd
Feb 23, 2017 6:40:19 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@25d250c6] Created with target etcd
Feb 23, 2017 6:40:27 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@3eb7fc54] Created with target etcd
Feb 23, 2017 6:40:27 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@6ef888f6] Created with target etcd
Feb 23, 2017 6:40:33 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@49b0b76] Created with target etcd
Feb 23, 2017 6:40:33 PM io.grpc.internal.ManagedChannelImpl <init>
INFO: [ManagedChannelImpl@6f96c77] Created with target etcd
Tests run: 37, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 16.797 sec - in TestSuite

Results :

Tests run: 37, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 39.229 s
[INFO] Finished at: 2017-02-23T18:40:34+02:00
[INFO] Final Memory: 37M/587M
[INFO] ------------------------------------------------------------------------

Contact

• Mailing list: etcd-dev
• IRC: #etcd on freenode.org

Contributing

See CONTRIBUTING for details on submitting patches and the contribution workflow.

Reporting bugs

See reporting bugs for details about reporting any issues.

License

jetcd is under the Apache 2.0 license. See the LICENSE file for details.