net.sf.hajdbc.state.health.observer.ConnectObserveAdapter Maven / Gradle / Ivy

Go to download

package net.sf.hajdbc.state.health.observer;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;

/**
 * Observe adapter for connect
 */
public abstract class ConnectObserveAdapter implements ObserveAdapter {

  public static final int TIME_OUT = 500;

  public abstract int getPort();

  @Override
  public boolean isObservable(String ip) {
    return isConnectable(ip);
  }

  public  boolean isConnectable(String host) {
    Socket socket = new Socket();
    try {
      socket.connect(new InetSocketAddress(host, getPort()), TIME_OUT);
    } catch (IOException e) {
      //ignore io exception
      return false;
    } finally {
      try {
        socket.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
    return true;
  }
}