com.logicbus.service.ServiceReload Maven / Gradle / Ivy

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package com.logicbus.service;

import java.util.HashMap;
import java.util.Map;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import com.anysoft.util.Settings;
import com.logicbus.backend.AbstractServant;
import com.logicbus.backend.Context;
import com.logicbus.backend.ServantException;
import com.logicbus.backend.ServantFactory;
import com.logicbus.backend.ServantPool;
import com.logicbus.backend.message.JsonMessage;
import com.logicbus.backend.message.XMLMessage;
import com.logicbus.models.catalog.Path;
import com.logicbus.models.servant.ServantManager;
import com.logicbus.models.servant.ServiceDescription;

/**
 * 重载服务
 * 
 * 

 * 重新装载服务,刷新服务配置.

 * 
 * 实现了一个内部核心服务，定义在/com/logicbus/service/servant.xml中，具体配置如下:

 * 
 * {@code 
 * 	
 * }
 * 
 * 

 * 本服务需要客户端传送参数，包括：

 * - service 要查询的服务ID,本参数属于必选项

 * 
 * 本服务属于系统核心管理服务，内置了快捷访问，在其他服务的URL中加上reload参数即可直接访问，
 * 例如：要暂停/demo/logicbus/Helloworld服务，可输入URL为：

 * {@code
 * http://[host]:[port]/[webcontext]/services/demo/logicbus/Helloworld?reload
 * }
 * 

 * 如果配置在服务器中，访问地址为：

 * {@code
 * http://[host]:[port]/[webcontext]/services/core/ServiceReload?service=[服务ID] 
 * }
 * 
 * @author duanyy
 * @version 1.2.6 [20140807 duanyy] 

 * - ServantPool和ServantFactory插件化 
 * 
 * @version 1.2.8.2 [20141014 duanyy]

 * - 支持双协议:XML,JSON 

 * 
 * @version 1.4.0 [20141117 duanyy] 

 * - 将MessageDoc和Context进行合并整合 

 */
public class ServiceReload extends AbstractServant {
	
	protected void onDestroy() {

	}

	
	protected void onCreate(ServiceDescription sd) throws ServantException {

	}

	
	protected int onXml(Context ctx) throws Exception {
		XMLMessage msg = (XMLMessage)ctx.asMessage(XMLMessage.class);
		String id = ctx.GetValue("service", "");
		if (id == null || id.length() <= 0) {
			throw new ServantException("client.args_not_found",
					"Can not find parameter:service");
		}	
		Path path = new Path(id);
		ServantManager sm = ServantManager.get();
		ServiceDescription sd = sm.get(path);
		if (sd == null){
			throw new ServantException("user.data_not_found","Service does not exist:" + id);
		}

		Element root = msg.getRoot();
		Document doc = root.getOwnerDocument();
		Element service = doc.createElement("service");
		sd.report(service);		
		
		Settings settings = Settings.get();
		ServantFactory sf = (ServantFactory)settings.get("servantFactory");
		ServantPool pool = sf.getPool(path);
		if (pool != null) {
			pool.reload(sd);
			pool.report(service);
		} 
		
		root.appendChild(service);	
		return 0;
	}

	
	protected int onJson(Context ctx) throws Exception {
		JsonMessage msg = (JsonMessage)ctx.asMessage(JsonMessage.class);	
		
		String id = getArgument("service", ctx);		
		Path path = new Path(id);
		ServantManager sm = ServantManager.get();
		ServiceDescription sd = sm.get(path);
		if (sd == null){
			throw new ServantException("user.data_not_found","Service does not exist:" + id);
		}	
		
		Map root = msg.getRoot();

		Map service = new HashMap();
		
		sd.report(service);
		
		//关联服务的实时统计信息
		Settings settings = Settings.get();
		ServantFactory sf = (ServantFactory)settings.get("servantFactory");
		ServantPool pool = sf.getPool(path);
		if (pool != null) {
			pool.reload(sd);
			pool.report(service);
		}
		
		root.put("service", service);
		return 0;
	}

}