数据库故障和web故障检测模块！

1.模块功能: 1.对web服务器进行ping操作,如果ping不通,则上报web服务器无法ping通. 如果可以ping通,继续测试web服务是否可以访问,如果不能访问则上报web服务无法访问故障. 2.对数据库服务器进行ping操作,如果ping不通,则上报数据库服务器无法ping通. 如果可

1.模块功能:
    1.对web服务器进行ping操作,如果ping不通,则上报"web服务器无法ping通".
      如果可以ping通,继续测试web服务是否可以访问,如果不能访问则上报"web服务无法访问故障".
    2.对数据库服务器进行ping操作,如果ping不通,则上报"数据库服务器无法ping通".
      如果可以ping通,继续测试web服务是否可以访问,如果不能访问则上报"数据库无法连接故障".
 2.主要技术点:
    1.通过使用threadlocal线程变量解决多线程(并且每个线程都拥有自己的变量)并发的问题.
    2.通过使用dom4j解析xml文件使程序更具扩展性(支持多层, 约定优于配置: 一个property下面必须有一个rule).

      同时注意用dom4j解析xml文件,必须依赖于jaxen类库.

<span style="font-size:12px;">package com.ilucky.malf.rule;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import com.ilucky.malf.rule.BaseRule;

/**
 * @author IluckySi
 * @date 20140727
 */
public class RuleBuilder {

	private static RuleBuilder instance;
	
	public static final String ID = "id";
	
	public static final String NAME = "name";
	
	public static final String TYPE = "type";
	
	public static final String PROPERTY = "property";
	
	private Map<string baserule> map = new HashMap<string baserule>();

	public static RuleBuilder getInstance() {
		if(instance == null) {
			instance = new RuleBuilder();
		}
		return instance;
	}
	
	@SuppressWarnings("unchecked")
	private RuleBuilder() {
		String malfRulePath = "/com/ilucky/malf/malf_rule.xml";
		InputStream is = null;
		Document document = null;
		try {
			is = this.getClass().getResourceAsStream(malfRulePath);
			SAXReader saxReader = new SAXReader();
			document = saxReader.read(is);
			Element root = document.getRootElement();
			List<element> rootChildren = root.elements();
			for(int i = 0; rootChildren != null && i  propertyElements = element.selectNodes(PROPERTY);
			for(int i = 0; propertyElements != null && i  ruleElements = propertyElement.elements();
				if(!ruleElements.isEmpty()){
					Element ruleElement = ruleElements.get(0); 
					BeanUtils.setProperty(baseRule, propertyName, build(ruleElement));
				}
			}
		} catch (Exception e) {
			System.out.println("解析故障规则配置文件失败: " + e.toString());
		}
		return baseRule;
	}
	
	public BaseRule build(String id) {
		return map.get(id);
	}
}
</element></string></string></span>

    3.通过使用quartz任务调度器创建简单定时任务.

<span style="font-size:12px;">package com.ilucky.malf.quartz;

import java.text.ParseException;

import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;

/**
 * @author IluckySi
 * @date 20140727
 */
public class MalfQuartz {
	
	private int cycle = 30;
	
	private static final String TRIGGER_NAME= "triggerName";
	
	private static final String TRIGGER_GROUP_NAME = "triggerGroupName";
	
	private static final String JOB_NAME = "jobName";
	
	private static final String JOB_GROUP_NAME = "jobGroupName";
	
	public void start(){
		SchedulerFactory schedulerFactory = new StdSchedulerFactory();
		Scheduler scheduler;
		try {
			scheduler = schedulerFactory.getScheduler();
			scheduler.scheduleJob(createJobDetail(), createTrigger(cycle));
			scheduler.start();
			System.out.println("故障检测定时任务启动成功!");
		} catch (SchedulerException e) {
			System.out.println("故障检测定时任务启动失败: "+e.getMessage());
		}
	}
	
	private Trigger createTrigger(int cycle) {
		String cron = "0/" + cycle + " * * * * ?";
		CronTrigger trigger = new CronTrigger(TRIGGER_NAME, TRIGGER_GROUP_NAME);
		try {
			trigger.setCronExpression(cron);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return trigger;
	}

	private JobDetail createJobDetail() {
		return new JobDetail(JOB_NAME, JOB_GROUP_NAME, MalfJob.class);
	}
}
</span>

    4.测试数据库是否可以正常连接.
    5.测试web服务是否可以正常访问.
    6.在java文件中获取WEB-INF路径.
    7.使用BeanUtils的setProerpty方法要保证bean为此property提供了set方法.
    8.检测web服务是否可以访问除了用commons-httpclient类库,还要依赖common-codec,否则执行
       HttpMethod method = new GetMethod(url)命令时,会卡死在这里.
    9.pingUtil里面有一个ProcessMonitor线程,此线程的目的是如果ping主机的线程一直等待,
       那么最长时间等待10秒,超过10秒后由ProcessMonitor线程将其杀死.
    10.另外测试主机是否可以ping通,并不一定要通过分析返回结果.
3.功能扩展.

   1.故障规则配置文件支持多层配置,即多层嵌套，直接看配置文件：

<span style="font-size:12px;"><?xml version="1.0" encoding="UTF-8"?>
<root>
	<rule id="malf_web" name="web故障测试" type="com.ilucky.malf.rule.AndRule">
		<property name="leftRule">
			<rule id="ping_web" name="ping web服务器测试" type="com.ilucky.malf.rule.web.PingWebRule"></rule>
		</property>
		<property name="rightRule">
			<rule id="access_web" name="访问web服务测试" type="com.ilucky.malf.rule.web.AccessWebRule"></rule>
		</property>
	</rule>
	
	<rule id="malf_database" name="数据库故障测试" type="com.ilucky.malf.rule.AndRule">
		<property name="leftRule">
			<rule id="ping_database" name="ping数据库服务器测试" type="com.ilucky.malf.rule.database.PingDatabaseRule"></rule>
		</property>
		<property name="rightRule">
			<rule id="connect_database" name="连接数据库服务测试" type="com.ilucky.malf.rule.database.ConnectDatabaseRule"></rule>
		</property>
	</rule>	
</root></span>

   2.条件之间可以建立多种关系(与,或,非,异或等).

   3.如果要加其他故障测试,只需要修改一下配置文件,然后写工具类,无需修改原有代码.

最后看测试类：

<span style="font-size:12px;">package com.ilucky.malf;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.ilucky.malf.quartz.MalfQuartz;

/**
 * @author IluckySi
 * @date 20140727
 */
public class MainTest {

	public static Map<string list string>>> datasource= new HashMap<string list string>>>();
	
	public static void main(String[] arsg) {
		
		//模拟web测试数据.
		List<map string>> webs = new ArrayList<map string>>();
		Map<string string> map1 = new HashMap<string string>();
		map1.put("type", "web服务");
		map1.put("ip", "192.168.72.149");
		map1.put("url", "http://192.168.72.149:8080");
		webs.add(map1);
		Map<string string> map2 = new HashMap<string string>();
		map2.put("type", "web服务");
		map2.put("ip", "192.168.72.153");
		map2.put("url", "http://192.168.72.153:8080");
		webs.add(map2);
		Map<string string> map3 = new HashMap<string string>();
		map3.put("type", "web服务");
		map3.put("ip", "192.168.72.253");
		map3.put("url", "http://192.168.72.253:8080");
		webs.add(map3);
		datasource.put("malf_web", webs);
		
		//模拟数据库测试数据.
		List<map string>> databases = new ArrayList<map string>>();
		Map<string string> map4 = new HashMap<string string>();
		map4.put("type", "数据库服务");
		map4.put("ip", "192.168.73.236");
		map4.put("username", "system");
		map4.put("password", "talent");
		map4.put("url", "jdbc:oracle:thin:@192.168.73.236:1521:k3");
		map4.put("sql", "select 1 from dual");
		map4.put("driver", "oracle.jdbc.driver.OracleDriver");
		databases.add(map4);
		Map<string string> map5 = new HashMap<string string>();
		map5.put("type", "数据库服务");
		map5.put("ip", "192.168.67.130");
		map5.put("username", "k3");
		map5.put("password", "k3");
		map5.put("url", "jdbc:oracle:thin:@192.168.67.130:1521:kongsan");
		map5.put("sql", "select 1 from dual");
		map5.put("driver", "oracle.jdbc.driver.OracleDriver");
		databases.add(map5);
		Map<string string> map6 = new HashMap<string string>();
		map6.put("type", "数据库服务");
		map6.put("ip", "192.168.72.153");
		map6.put("username", "core");
		map6.put("password", "core");
		map6.put("url", "jdbc:oracle:thin:@192.168.72.153:1521:core");
		map6.put("sql", "select 1 from dual");
		map6.put("driver", "oracle.jdbc.driver.OracleDriver");
		databases.add(map6);
		datasource.put("malf_database", databases);
		
		//创建任务调度器:30秒检测一次.
		new MalfQuartz().start();
	}
}
</string></string></string></string></string></string></map></map></string></string></string></string></string></string></map></map></string></string></span>

只把一部分代码贴出来了，看如下项目目录：