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add the function of getting duird's monitor data form remote server via

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jmx.
This commit is contained in:
yunnysunny
2013-03-23 17:11:21 +08:00
parent e5b86e4561
commit cc24af9812
2 changed files with 134 additions and 2 deletions
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src/main/java/com/alibaba/druid/stat/DruidStatService.java
+1 -1
View File
@@ -299,7 +299,7 @@ public final class DruidStatService implements DruidStatServiceMBean {
return returnJSONResult(RESULT_CODE_SUCCESS, result);
}
private String returnJSONResult(int resultCode, Object content) {
public static String returnJSONResult(int resultCode, Object content) {
Map<String, Object> dataMap = new LinkedHashMap<String, Object>();
dataMap.put("ResultCode", resultCode);
dataMap.put("Content", content);
src/main/java/com/alibaba/druid/support/http/StatViewServlet.java
+133 -1
View File
@@ -16,9 +16,17 @@
package com.alibaba.druid.support.http;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
@@ -50,6 +58,10 @@ public class StatViewServlet extends HttpServlet {
public static final String PARAM_NAME_USERNAME = "loginUsername";
public static final String PARAM_NAME_PASSWORD = "loginPassword";
public static final String PARAM_NAME_JMX_URL = "jmxUrl";
public static final String PARAM_NAME_JMX_USERNAME = "jmxUsername";
public static final String PARAM_NAME_JMX_PASSWORD = "jmxPassword";
public static final String SESSION_USER_KEY = "druid-user";
@@ -65,6 +77,14 @@ public class StatViewServlet extends HttpServlet {
private String username = null;
private String password = null;
/** web.xml中配置的jmx的连接地址 */
private String jmxUrl = null;
/** web.xml中配置的jmx的用户名 */
private String jmxUsername = null;
/** web.xml中配置的jmx的密码 */
private String jmxPassword = null;
private MBeanServerConnection conn = null;
public void init() throws ServletException {
initAuthEnv();
@@ -127,6 +147,118 @@ public class StatViewServlet extends HttpServlet {
String msg = "initParameter config error, deny : " + getInitParameter(PARAM_NAME_DENY);
LOG.error(msg, e);
}
//获取jmx的连接配置信息
String param = readInitParam(PARAM_NAME_JMX_URL);
if (param != null) {
jmxUrl = param;
jmxUsername = readInitParam(PARAM_NAME_JMX_USERNAME);
jmxPassword = readInitParam(PARAM_NAME_JMX_PASSWORD);
try {
initJmxConn();
} catch (IOException e) {
LOG.error("init jmx connection error", e);
}
}
}
/**
* 读取servlet中的配置参数.
*
* @param key 配置参数名
* @return 配置参数值，如果不存在当前配置参数，或者为配置参数长度为0，将返回null
*/
private String readInitParam(String key) {
String value = null;
try {
String param = getInitParameter(key);
if (param != null) {
param = param.trim();
if (param.length() > 0) {
value = param;
}
}
} catch (Exception e) {
String msg = "initParameter config ["+ key +"] error";
LOG.warn(msg, e);
}
return value;
}
/**
* 初始化jmx连接
* @throws IOException
* */
private void initJmxConn() throws IOException {
if (jmxUrl != null) {
JMXServiceURL url = new JMXServiceURL(jmxUrl);
Map<String, String[]> env = null;
if (jmxUsername != null) {
env = new HashMap<String, String[]>();
String[] credentials = new String[]{jmxUsername,jmxPassword};
env.put(JMXConnector.CREDENTIALS, credentials);
}
JMXConnector jmxc = JMXConnectorFactory.connect(url, env);
conn = jmxc.getMBeanServerConnection();
}
}
/**
* 根据指定的url来获取jmx服务返回的内容.
*
* @param connetion jmx连接
* @param url url内容
* @return the jmx返回的内容
* @throws Exception the exception
*/
private String getJmxResult(MBeanServerConnection connetion,String url)
throws Exception {
ObjectName name = new ObjectName(DruidStatService.MBEAN_NAME);
String result = (String) conn.invoke(name, "service",
new String[] { url }, new String[] { String.class.getName() });
return result;
}
/**
* 程序首先判断是否存在jmx连接地址，如果不存在，则直接调用本地的duird服务；
* 如果存在，则调用远程jmx服务。在进行jmx通信，首先判断一下jmx连接是否已经建立成功，如果已经
* 建立成功，则直接进行通信，如果之前没有成功建立，则会尝试重新建立一遍。.
*
* @param url 要连接的服务地址
* @return 调用服务后返回的json字符串
*/
private String genServiceResponse(String url) {
String resp = null;
if (jmxUrl == null) {
resp = statService.service(url);
} else {
if (conn == null) {//连接在初始化时创建失败
try {//尝试重新连接
initJmxConn();
} catch (IOException e) {
LOG.error("init jmx connection error", e);
resp = DruidStatService.returnJSONResult(DruidStatService.RESULT_CODE_ERROR, "init jmx connection error"+e.getMessage());
}
if (conn != null) {//连接成功
try {
resp = getJmxResult(conn,url);
} catch (Exception e) {
LOG.error("get jmx data error", e);
resp = DruidStatService.returnJSONResult(DruidStatService.RESULT_CODE_ERROR, "get data error:"+e.getMessage());
}
}
} else {//连接成功
try {
resp = getJmxResult(conn,url);
} catch (Exception e) {
LOG.error("get jmx data error", e);
resp = DruidStatService.returnJSONResult(DruidStatService.RESULT_CODE_ERROR, "get data error"+e.getMessage());
}
}
}
return resp;
}
private void initAuthEnv() {
@@ -242,7 +374,7 @@ public class StatViewServlet extends HttpServlet {
if (request.getQueryString() != null && request.getQueryString().length() > 0) {
fullUrl += "?" + request.getQueryString();
}
response.getWriter().print(statService.service(fullUrl));
response.getWriter().print(genServiceResponse(fullUrl));
return;
}