淘宝动态配置diamond-client 准备工作

最新推荐文章于 2024-04-05 01:00:00 发布

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本文介绍了在淘宝的Diamond客户端中进行动态配置的准备工作，包括修改diamond-utils工程的Constants值，处理报错信息，特别是针对网络获取服务器列表失败的错误进行分析，并提供了创建ServerAddress文件及修改相应代码的解决方案。

1.diamond-utils 工程里的com.taobao.diamond.common.Constants

修改成这个值

public static final String HTTP_URI_FILE = "/diamond-server/config.co";

2.创建一个类

public class DiamondClient {
	public static void main(String[] str) {
		DiamondManager diamondManager = new DefaultDiamondManager("one", "a",
				new ManagerListener() {
					public void receiveConfigInfo(String configInfo) {
						System.out.println("receiveConfigInfo" + configInfo);
					}

					public Executor getExecutor() {
						return null;
					}
				});
		diamondManager.getDiamondConfigure().setPort(8080);
		String availableConfigureInfomation = diamondManager
				.getAvailableConfigureInfomation(5000);
		System.out.println("diamond值" + availableConfigureInfomation);
	}
}

执行这个方法就可以获得相应的数据

3.报错信息

<span style="color:#FF0000;">java.lang.RuntimeException: 获取修改过的DataID列表超时 <title>Redirect</title>, 超时时间为：10000
	at com.taobao.diamond.client.impl.DefaultDiamondSubscriber.checkUpdateDataIds(DefaultDiamondSubscriber.java:871)
	at com.taobao.diamond.client.impl.DefaultDiamondSubscriber.checkDiamondServerConfigInfo(DefaultDiamondSubscriber.java:317)
	at com.taobao.diamond.client.impl.DefaultDiamondSubscriber.access$4(DefaultDiamondSubscriber.java:316)
	at com.taobao.diamond.client.impl.DefaultDiamondSubscriber$2.run(DefaultDiamondSubscriber.java:243)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)</span>

4.错误分析

4.1当出现这个错误的时候，个人认为就是从网络获取server列表时候出错了

com.taobao.diamond.client.processor.ServerAddressProcessor

/**
     * 获取diamond服务器地址列表
     * 
     * @param acquireCount
     *            根据0或1决定从日常或线上获取
     * @return
     */
    private boolean acquireServerAddressOnce(int acquireCount) {
        HostConfiguration hostConfiguration = configHttpClient.getHostConfiguration();
        String configServerAddress;
        int port;
        if (null != diamondConfigure.getConfigServerAddress()) {
            configServerAddress = diamondConfigure.getConfigServerAddress();
            port = diamondConfigure.getConfigServerPort();
        }
        else {
            if (acquireCount == 0) {
                configServerAddress = Constants.DEFAULT_DOMAINNAME;
                port = Constants.DEFAULT_PORT;
            }
            else {
                configServerAddress = Constants.DAILY_DOMAINNAME;
                port = Constants.DEFAULT_PORT;
            }
        }
        hostConfiguration.setHost(configServerAddress, port);

        String serverAddressUrl = Constants.CONFIG_HTTP_URI_FILE;

        HttpMethod httpMethod = new GetMethod(serverAddressUrl);
        // 设置HttpMethod的参数
        HttpMethodParams params = new HttpMethodParams();
        params.setSoTimeout(diamondConfigure.getOnceTimeout());
        // ///////////////////////
        httpMethod.setParams(params);

        try {
            if (SC_OK == configHttpClient.executeMethod(httpMethod)) {
                InputStreamReader reader = new InputStreamReader(httpMethod.getResponseBodyAsStream());
                BufferedReader bufferedReader = new BufferedReader(reader);
                String address = null;
                List<String> newDomainNameList = new LinkedList<String>();
                while ((address = bufferedReader.readLine()) != null) {
                    address = address.trim();
                    if (StringUtils.isNotBlank(address)) {
                        newDomainNameList.add(address);
                    }
                }
                if (newDomainNameList.size() > 0) {
                    log.debug("更新使用的服务器列表");
                    this.diamondConfigure.setDomainNameList(newDomainNameList);
                    return true;
                }
            }
            else {
                log.warn("没有可用的新服务器列表");
            }
        }
        catch (HttpException e) {
            log.error(getErrorMessage(configServerAddress) + ", " + e);
        }
        catch (IOException e) {
            log.error(getErrorMessage(configServerAddress) + ", " + e);
        }
        catch (Exception e) {
            log.error(getErrorMessage(configServerAddress) + ", " + e);
        }
        finally {
            httpMethod.releaseConnection();
        }
        return false;
    }

返回的流是一段html代码

<html>
<script language=javascript type="text/javascript">
window.location.replace("http://bjdnserror5.wo.com.cn:8080?HOST="
+ location.hostname + "&R="
+ location.pathname + "&" + location.search.substr(location.search.indexOf("\?")+1));
</script>
<noscript>
<meta   http-equiv="refresh"   content="0;URL=http://bjdnserror5.wo.com.cn:8080">
</noscript>
<head>
<title>Redirect</title>
</head>
<body bgcolor="white" text="black">
</body>
</html>

5.解决方案

5.1在C:\Users\用户名称\diamond\下创建ServerAddress文件

内容是diamond-server的实例ip地址

5.2com.taobao.diamond.client.processor.ServerAddressProcessor

修改以下代码

public synchronized void start() {
        if (isRun) {
            return;
        }
        isRun = true;
        initHttpClient();
        if (this.diamondConfigure.isLocalFirst()) {
            acquireServerAddressFromLocal();
        }
        else {
            synAcquireServerAddress();
//            asynAcquireServerAddress();
        }

    }



protected void synAcquireServerAddress() {
        if (!isRun) {
            throw new RuntimeException("ServerAddressProcessor不在运行状态，无法同步获取服务器地址列表");
        }
        if (MockServer.isTestMode()) {
            diamondConfigure.addDomainName("测试模式，没有使用的真实服务器");
            return;
        }

//        int acquireCount = 0;
        if (diamondConfigure.getDomainNameList().size() == 0) {
            reloadServerAddresses();
//            if (!acquireServerAddressOnce(acquireCount)) {
//                acquireCount++;
//                if (acquireServerAddressOnce(acquireCount)) {
//                    // 存入本地文件
//                    storeServerAddressesToLocal();
//                    log.info("在同步获取服务器列表时，向日常ConfigServer服务器获取到了服务器列表");
//                }
//                else {
//                    log.info("从本地获取Diamond地址列表");
//                    reloadServerAddresses();
//                    if (diamondConfigure.getDomainNameList().size() == 0)
//                        throw new RuntimeException("当前没有可用的服务器列表");
//                }
//            }
//            else {
//                log.info("在同步获取服务器列表时，向线上ConfigServer服务器获取到了服务器列表");
//                // 存入本地文件
//                storeServerAddressesToLocal();
//            }
        }
    }

此时应该就不会报刚才的错误信息了