services.js

Hippo CMS是一个以信息为中心的开源内容管理系统。Hippo CMS目标是供中,大型企业来管理其发布在互连网

/*
* Copyright 2001-2007 Hippo (www.hippo.nl)
*
* Licensed 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.
*/
/**
 * default Service manager
 * supporting container based service lookup and decommissioning.
 */  

function DefaultServiceManager() {
  if(!Cfx.Class.IsDefined(DefaultServiceManager)) {
    Cfx.Class.New(DefaultServiceManager);
  
    if(Cfx.Class.IsInitializing(DefaultServiceManager)) {
       DefaultServiceManager.Method(lookup);
       DefaultServiceManager.Method(hasService);
       DefaultServiceManager.Method(put);

       return;
    }
  }

  /**
   *  @param 	ServiceManager
   *  @param 	Logger
   */
  this.InitInstance();
  if(arguments.length) {
    this.parentManager = arguments[0];
    this.log = arguments[1];
  } 
  this.services = new Array();
  
  return this;

  function lookup(role) {
  	
    if (this.log.debugging()) {
      this.log.debug("lookup: " + role);
    }        
  	
    var service = this.services[role];
    if (service != null) {
      return service;
    }
    if ( this.parentManager != null ) {
      return this.parentManager.lookup(role);
    }
    throw new Error("Service for role " + role + " not found!")
    //this.log.error("Service for role " + role + " not found!");
  }
  
  function hasService(role) {
    if (this.services[role] != null) {
      return true;
    }
    if (this.parentManager != null) {
      return this.parentManager.hasService(role);
    }
    return false;
  }

  function put(role,service) {
    this.services[role] = service;
  }
  
}