com.logicbus.models.servant.ServantManager Maven / Gradle / Ivy

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package com.logicbus.models.servant;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import com.logicbus.backend.PathPatternSupport;
import org.apache.commons.lang3.StringUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.anysoft.util.Factory;
import com.anysoft.util.IOTools;
import com.anysoft.util.Properties;
import com.anysoft.util.PropertiesConstants;
import com.anysoft.util.Settings;
import com.anysoft.util.XmlTools;
import com.anysoft.util.resource.ResourceFactory;
import com.logicbus.models.catalog.Path;
import com.logicbus.backend.ServantRegistry;

/**
 * 服务规格管理器
 * 
 * 

 * 服务规格管理器负责从服务目录中读取服务规格信息,可支持一到多个服务目录.配置文件地址可以从web.xml或者全局参数中读取，参数包括：

 * 
 * - master.servant.config 配置文件URL地址,缺省为：java:///com/logicbus/models/servant/default.xml

 * - secondary.servant.config 配置文件备用URL地址,缺省为:java:///com/logicbus/models/servant/default.xml

 * 
 * 缺省的配置文件内容如下:

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *     
 *     
 *         
 *         
 *         	
 *     
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~    
 * 
 * 

 * 
 * 由于{@link ServantManager}在查找服务时是一个一个服务目录查找的,因此配置文件中的服务目录次序就很重要,如果配置在前面,将优先被搜索到.
 * 例如配置了服务目录A和服务目录B，而A和B中都包含了服务/demo/logicbus/Helloworld,由于A配置在前面，将永远搜索到A提供的/demo/logicbus/Helloworld，
 * 而B中提供的/demo/logicbus/Helloworld服务则永远不会被调用.

 * 
 * @author duanyy
 *
 * @version 1.6.7.9 [20170201 duanyy] 

 * - 采用SLF4j日志框架输出日志 

 * 
 * @version 1.6.7.20 

 * - 改造ServantManager模型,增加服务配置监控机制 

 *
 * @version 1.6.14.12 [20210617 duanyy] 

 * - 部分功能迁移到基类 

 */
public class ServantManager extends ServantRegistry.Abstract{
	
	/**
	 * 缺省配置文件
	 */
	protected static final String DEFAULT 
		= "java:///com/logicbus/models/servant/servantcatalog.default.xml#com.logicbus.backend.server.LogicBusApp"; 

	/**
	 * Constructor
	 *  
	 */
	public ServantManager(){
	
	}

	@Override
	public void configure(Properties p) {
		super.configure(p);
		String configFile = PropertiesConstants.getString(p,"servant.config.master",DEFAULT,false);
		String secondaryFile = PropertiesConstants.getString(p,"servant.config.secondary",DEFAULT,false);

		InputStream in = null;
		try {
			ResourceFactory rf = Settings.getResourceFactory();
			in = rf.load(configFile,secondaryFile, null);
			Document doc = XmlTools.loadFromInputStream(in);
			if (doc != null) {
				loadConfig(p, doc.getDocumentElement());
			}
		} catch (Exception ex){
			logger.error("Error occurs when load xml file,source=" + configFile, ex);
		}finally {
			IOTools.closeStream(in);
		}
	}
}