jcm: A Java repository from stevenberge

JCM

JCM is a distributed name service implementation based on ZooKeeper.

FEATURE

manage more than hundred thousand nodes (ip)
map cluster name to node(ip) list
health checking on every node
persistent storage cluster list into zookeeper
totally distributed, read and write every JCM server
HTTP api based on JSON

Run

start zookeeper first (standalone or distributed)
start JCM server
```
 java -jar jcm.server-0.1.0.jar
```

add some clusters with nodes to JCM with HTTP api

 curl -i -X POST http://10.181.97.106:8080/c -H "Content-Type:application/json" --data-binary @./doc/cluster_sample.json

use jcm.subscriber to subscribe clusters, to get nodes from JCM server

Subscriber Usage

Subscriber is a library used in client side.

Subscriber subscriber = new Subscriber( Arrays.asList("127.0.0.1:8080"),
    Arrays.asList("hello9", "hello"));
RRAllocator rr = new RRAllocator();
subscriber.addListener(rr);
subscriber.startup();
for (int i = 0; i < 2; ++i) {
  System.out.println(rr.alloc("hello9", ProtoType.HTTP));
}
subscriber.shutdown();

see more examples jcm.subscriber/src/test

HTTP API Reference

See doc/api.md

Compile

mvn package -Dmaven.test.skip=true

If run with tests, startup zookeeper first

Implementation Brief

Architecture overview:

Module overview:

LICENSE

/*******************************************************************************
 *  Copyright Kevin Lynx (kevinlynx@gmail.com) 2015
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 *******************************************************************************/

stevenberge/jcm