EmbeddedZookeeper.java

/*
Copyright 2011 Edward Capriolo

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.
*/
package com.jointhegrid.ironcount;

import com.jointhegrid.ironcount.manager.StringSerializer;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.InetSocketAddress;

import org.I0Itec.zkclient.ZkClient;
import org.apache.zookeeper.server.NIOServerCnxn;
import org.apache.zookeeper.server.ZooKeeperServer;

public class EmbeddedZookeeper {

  String snapshotDir = "/tmp/kzsnap";
  String logDir = "/tmp/zklog";
  ZooKeeperServer zk;
  ZkClient client;
  NIOServerCnxn.Factory factory;
  int port;

  public EmbeddedZookeeper(int port) {
    this.port = port;
  }

  public void start() throws IOException, InterruptedException {
    File sn = new File(snapshotDir);
    sn.mkdir();
    File lg = new File(logDir);
    lg.mkdir();
    zk = new ZooKeeperServer(sn, lg, 3000);
    factory = new NIOServerCnxn.Factory(new InetSocketAddress("localhost", port));
    factory.startup(zk);
    client = new ZkClient("localhost:" + port);
    client.setZkSerializer(new StringSerializer());
  }

  public void prepair() throws Exception {
    this.delete(new File(this.logDir));
    this.delete(new File(this.snapshotDir));
  }

  public void shutdown() {
    factory.shutdown();
  }

  public static void delete(File f) throws IOException {
    if (!f.exists()) {
      return;
    }
    if (f.isDirectory()) {
      for (File c : f.listFiles()) {
        delete(c);
      }
    }
    if (!f.delete()) {
      throw new FileNotFoundException("Failed to delete file: " + f);
    }
  }
}