content: /*
   *  Copyright Beijing 58 Information Technology Co.,Ltd.
   *
   *  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 com.bj58.spat.gaea.client.configuration;
  
  import com.bj58.spat.gaea.client.GaeaConst;
  import com.bj58.spat.gaea.client.configuration.commmunication.ProtocolProfile;
  import com.bj58.spat.gaea.client.configuration.commmunication.SocketPoolProfile;
  import com.bj58.spat.gaea.client.configuration.loadbalance.ServerProfile;
  import com.bj58.spat.gaea.client.configuration.secure.KeyProfile;
  import com.bj58.spat.gaea.client.utility.helper.XMLHelper;
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  import javax.xml.xpath.*;
  import org.w3c.dom.*;
  
  /**
   * ServiceConfig
   *
   * @author Service Platform Architecture Team (spat@58.com)
   */
  public final class ServiceConfig {
  
      private String servicename;
      private int serviceid;
      private SocketPoolProfile SocketPool;
      private ProtocolProfile protocol;
      private List<ServerProfile> servers;
      private KeyProfile SecureKey;//授权配置文件
      
      public KeyProfile getSecureKey() {
  		return SecureKey;
  	}
  
  	public void setSecureKey(KeyProfile secureKey) {
  		SecureKey = secureKey;
  	}
  
      private ServiceConfig() {
      }
  
      public SocketPoolProfile getSocketPool() {
          return SocketPool;
      }
  
      public ProtocolProfile getProtocol() {
          return protocol;
      }
  
      public List<ServerProfile> getServers() {
          return servers;
      }
  
      public int getServiceid() {
          return serviceid;
      }
  
      public String getServicename() {
          return servicename;
      }
  
      public static ServiceConfig GetConfig(String serviceName) throws Exception {
          File f = new File(GaeaConst.CONFIG_PATH);
          if (!f.exists()) {
              throw new Exception("gaea.config not fond:" + GaeaConst.CONFIG_PATH);
          }
  
          Element xmlDoc = XMLHelper.GetXmlDoc(GaeaConst.CONFIG_PATH);
          XPathFactory xpathFactory = XPathFactory.newInstance();
          XPath xpath = xpathFactory.newXPath();
          Node serviceNode = (Node) xpath.evaluate("//Service[@name='" + serviceName + "']", xmlDoc, XPathConstants.NODE);
          if(serviceNode == null){
          	printExceprion(0,serviceName);
          }
          
          ServiceConfig config = new ServiceConfig();
          config.servicename = serviceNode.getAttributes().getNamedItem("name").getNodeValue();
          Node idNode = serviceNode.getAttributes().getNamedItem("id");
          if(idNode == null){
          	printExceprion(4,serviceName);
          }
          config.serviceid = Integer.parseInt(idNode.getNodeValue());
          Node xnSocketPool = (Node) xpath.evaluate("Commmunication/SocketPool", serviceNode, XPathConstants.NODE);
          if(xnSocketPool == null){
          	printExceprion(1,serviceName);
          }
          config.SocketPool = new SocketPoolProfile(xnSocketPool);
  
          Node xnProtocol = (Node) xpath.evaluate("Commmunication/Protocol", serviceNode, XPathConstants.NODE);
          if(xnProtocol == null){
          	printExceprion(2,serviceName);
          }
          config.protocol = new ProtocolProfile(xnProtocol);
          
          /**
           * 加载授权文件key
           */
          Node xnKey = (Node) xpath.evaluate("Secure/Key", serviceNode, XPathConstants.NODE);
          config.SecureKey = new KeyProfile(xnKey);
          
          NodeList xnServers = (NodeList) xpath.evaluate("Loadbalance/Server/add", serviceNode, XPathConstants.NODESET);
          if(xnServers == null || xnServers.getLength() == 0){
          	printExceprion(3,serviceName);
          }
          
          List<ServerProfile> servers = new ArrayList<ServerProfile>();
          for (int i = 0; i < xnServers.getLength(); i++) {
              servers.add(new ServerProfile(xnServers.item(i)));
          }
          config.servers = servers;
          config.servicename = serviceName;
          return config;
      }
      
      
      private static void printExceprion(int i, String serviceName) throws Exception{
      	switch (i) {
  			case 0:
  				throw new Exception("gaea.config中没有发现" + serviceName + "服务节点!");
  			case 1:
  				throw new Exception("gaea.config服务节点" + serviceName + "没有发现Commmunication/SocketPool配置!");
  			case 2:
  				throw new Exception("gaea.config服务节点" + serviceName + "没有发现Commmunication/Protocol配置!");
  			case 3:
  				throw new Exception("gaea.config服务节点" + serviceName + "没有发现Loadbalance/Server/add配置!");
  			case 4:
  				throw new Exception("gaea.config服务节点" + serviceName + "没有发现Service/id配置!");
  			default:
  				break;
  		}
      }
  }
  