커피한잔의 여유와 코딩

package net.sjava.cassandra.test;

import java.util.Random;
import java.util.concurrent.ConcurrentLinkedQueue;

import org.apache.cassandra.thrift.Cassandra;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;

/**
 * Cassandra.Client 풀링 클래스
 *
 * @author mcsong@gmail.com
 * @since 2010/11/30
 *
 */
public class CassandraClientArrayFactory {
 /**
  * host array
  */
 private static String[] hosts = “127.0.0.1,127.0.0.1”.split(“,”) ;
 /**
  * port
  */
 private static int port = 9160;
 /**
  * pooing count
  */
 private static int count = 10;
 
 //
 private static ConcurrentLinkedQueue<Cassandra.Client> clients = new  ConcurrentLinkedQueue<Cassandra.Client>();
 
 /**
  * Cassandra.Client를 생성한다.
  * @return
  * @throws Exception
  */
 private static Cassandra.Client createCassandraClient() throws Exception {
  int index = new Random().nextInt(hosts.length);
  TTransport socket = new TSocket(hosts[index], port);
  socket.open();
  return new Cassandra.Client(new TBinaryProtocol(socket, false, false));
 }

 /**
  * Cassandra.Client를 풀에서 가져온다.
  * @return
  * @throws Exception
  */
 public static Cassandra.Client poll() throws Exception {
  if (!clients.isEmpty() && clients.peek() != null)
   return clients.poll();
  
  return createCassandraClient();
 }
 
 /**
  * Cassandra.Client를 풀에 넣는다.
  * @param client
  * @throws Exception
  */
 public static void push(Cassandra.Client client) throws Exception {
  System.out.println(“channel size : ” + clients.size());
  if (clients.size() >= count) {
   client = null; // garbage
   return;
  }
  
  clients.offer(client);
 }
}

package net.sjava.cassandra.test;

import org.apache.cassandra.thrift.Cassandra;
import org.apache.cassandra.thrift.Column;
import org.apache.cassandra.thrift.ColumnPath;
import org.apache.cassandra.thrift.ConsistencyLevel;

import static net.sjava.cassandra.test.CassandraClientArrayFactory.poll;
import static net.sjava.cassandra.test.CassandraClientArrayFactory.push;

public class CassandraClientArrayFactoryTest {

 public static void main(String[] args) {
  
  String keyspace = “Keyspace1”;
  String columnFamily = “Standard2”;
  String key = “key1”;
  long timestamp = System.currentTimeMillis();
  
  Cassandra.Client client = null;
  
  try {
   client = poll();   
   for(int i=0; i < 15; i++)
    push(client);
     
   String value =”bbbbbbbbbbbbbbbbbbbbbbbbbbbbb”;
   ColumnPath cPath = new ColumnPath(columnFamily);
   cPath.setColumn(“name”.getBytes(“utf-8”));
   client.insert(keyspace, key, cPath, value.getBytes(“utf-8”), timestamp, ConsistencyLevel.ONE);
   Column col = client.get(keyspace, key, cPath, ConsistencyLevel.ONE).getColumn();
   System.out.println(“Column name: ” + new String(col.name, “utf-8”)); 
   System.out.println(“Column value: ” + new String(col.value, “utf-8”)); 
  
   value =”ccccccccccccccccccccccccccccccccccccccc”;
   long time2 = System.currentTimeMillis();
   client.insert(keyspace, key, cPath, value.getBytes(“utf-8”), time2, ConsistencyLevel.ONE);
   Column col2 = client.get(keyspace, key, cPath, ConsistencyLevel.ONE).getColumn();
   System.out.println(“Column2 name: ” + new String(col2.name, “utf-8”)); 
   System.out.println(“Column2 value: ” + new String(col2.value, “utf-8”)); 
  } catch(Exception e) {
   e.printStackTrace();
  } finally {
   if(client != null)
    try {
     push(client);
    } catch (Exception e) {
     e.printStackTrace();
    }
  }
 }

}