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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.jclouds.virtualbox.predicates;

import javax.annotation.Resource;

import org.jclouds.logging.Logger;
import org.jclouds.ssh.SshClient;
import org.jclouds.ssh.SshException;

import com.google.common.base.Predicate;

public class SshResponds implements Predicate {
   @Resource
   protected Logger logger = Logger.NULL;

   @Override
   public boolean apply(SshClient client) {

      try {
         client.connect();
         if (client.exec("id").getExitStatus() == 0) {
            return true;
         }
      } catch (SshException e) {
         logger.trace("No response from ssh daemon connecting to %s: %s", client, e.getMessage());
      } finally {
        if (client != null) {
         client.disconnect();
        }
      }
      return false;
   }
}