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Extreme performance modern memcached client for java

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package net.rubyeye.xmemcached.aws;

import java.util.ArrayList;
import java.util.List;
import net.rubyeye.xmemcached.utils.ByteUtils;

/**
 * AWS get config command
 * 
 * @author dennis
 * 
 */
public class AWSUtils {

  private static final String DELIMITER = "|";

  /**
   * Parse response string to ClusterConfiguration instance.
   * 
   * @param line
   * @return
   */
  public static ClusterConfiguration parseConfiguration(String line) {
    String[] lines = line.trim().split("(?:\\r?\\n)");
    if (lines.length < 2) {
      throw new IllegalArgumentException("Incorrect config response:" + line);
    }
    String configversion = lines[0];
    String nodeListStr = lines[1];
    if (!ByteUtils.isNumber(configversion)) {
      throw new IllegalArgumentException(
          "Invalid configversion: " + configversion + ", it should be a number.");
    }
    String[] nodeStrs = nodeListStr.split("(?:\\s)+");
    int version = Integer.parseInt(configversion);
    List nodeList = new ArrayList(nodeStrs.length);
    for (String nodeStr : nodeStrs) {
      if (nodeStr.equals("")) {
        continue;
      }

      int firstDelimiter = nodeStr.indexOf(DELIMITER);
      int secondDelimiter = nodeStr.lastIndexOf(DELIMITER);
      if (firstDelimiter < 1 || firstDelimiter == secondDelimiter) {
        throw new IllegalArgumentException(
            "Invalid server ''" + nodeStr + "'' in response:  " + line);
      }
      String hostName = nodeStr.substring(0, firstDelimiter).trim();
      String ipAddress = nodeStr.substring(firstDelimiter + 1, secondDelimiter).trim();
      String portNum = nodeStr.substring(secondDelimiter + 1).trim();
      int port = Integer.parseInt(portNum);
      nodeList.add(new CacheNode(hostName, ipAddress, port));
    }

    return new ClusterConfiguration(version, nodeList);

  }

}