/// <summary>
/// 初始化ONS事务消息相关对象，一般在Application_Start中调用
/// </summary>
public static void Initialize()
{
if (_AliyunOnsIsEnabled == "1")
{
try
{
//初始化服务类列表和服务类标签列表
InitializeProperties();
//判断生产者的服务类是否存在
if (ONSProducerServiceList.Count > 0)
{
//输出生产服务类类名
ONSProducerServiceList.ForEach(service => DebugUtil.Debug("生产者的服务类：" + service.GetType().FullName));
//判断生产者实例列表是否为空
if (ONSProducerList != null && ONSProducerList.Count > 0)
{
ONSProducerList.ForEach(producer =>
{
//启动上游事务生产者
producer.start();
DebugUtil.Debug("Topic：" + producer.Topic + "，ProducerId（" + producer.Type.ToString() + @"）：" + producer.ProducerId + @"生产者.start()");
});
}
}
//判断消费者的服务类是否存在
if (ONSConsumerServiceList.Count > 0)
{
//输出消费服务类类名
ONSConsumerServiceList.ForEach(service => DebugUtil.Debug("消费者的服务类：" + service.GetType().FullName));
//判断消费者实例列表是否为空
if (ONSConsumerList != null && ONSConsumerList.Count > 0)
{
ONSConsumerList.ForEach(consumer =>
{
string tags = GetConsumerServiceTags(consumer.TagList);
consumer.subscribe(consumer.Topic, tags);
//启动上游事务生产者
consumer.start();
DebugUtil.Debug("Topic：" + consumer.Topic + "，ConsumerId（" + consumer.Type.ToString() + @"）：" + consumer.ConsumerId + @"消费者.start()，topic:" + consumer.Topic + "，tags:" + tags);
});
}
}
//延时若干毫秒
Thread.Sleep(1000);
DebugUtil.Debug(_Environment + "." + _ApplicationAlias + ".ONSHelper.Initialize最后延迟1000毫秒");
}
catch (Exception e)
{
//记录本地错误日志
DebugUtil.Debug(_Environment + "." + _ApplicationAlias + ".ONSHelper.Initialize出错：" + e.ToString());
//记录FATAL日志，发送FATAL目前出错
//SaveLog(LogTypeEnum.FATAL, "ONSHelper", "Initialize", _Environment + "." + _ApplicationAlias + ".ONSHelper.Initialize出错：" + e.ToString());
//发送邮件
SendDebugMail(_Environment + "." + _ApplicationAlias + ".ONSHelper.Initialize出错", "：" + e.ToString());
}
}
}
public static bool React(Message value, Type classType)
{
bool needToCommit = false;
string failureReason = "";
string topic = "";
string tag = "";
string pid = "";
string cid = "";
string key = "";
string type = "";
string body = "";
string method = "";
string requestTraceId = "";
string shardingKey = "";
Enum topicTag = null;
int consumedTimes = 0;
//尝试找到消费者服务类实例来消费
try
{
topic = value.getTopic();
tag = value.getTag();
pid = "PID_" + value.getTopic().ToUpper();
cid = ("CID_" + topic + "_" + _ApplicationAlias + "_" + classType.Name).ToUpper();
key = value.getKey();
type = value.getUserProperties("type");
body = value.getMsgBody();
body = Base64Util.Decode(body);
requestTraceId = value.getUserProperties("requestTraceId") ?? "";
shardingKey = value.getUserProperties("shardingKey") ?? "";
object parameter;
/*
* //在ONSConsumerServiceList中找到能匹配TopicTag的消费者服务类实例
* object service = ONSHelper.ONSConsumerServiceList.Where(s =>
* {
* string className = s.GetType().Name;
* IAbstractConsumerService iservice = (IAbstractConsumerService)s;
* Enum[] topicTagList = iservice.TopicTagList;
* if (topicTagList != null)
* {
* //需要同时判断topic和tag都匹配
* topicTag = topicTagList.Where(tt =>
* {
* string serviceTopic = (_Environment + "_" + tt.GetType().Name).ToUpper();
* string serviceTag = tt.ToString();
* return (topic.ToUpper() == serviceTopic) && (tag.ToUpper() == serviceTag.ToUpper());
* }).FirstOrDefault();
*
* if (topicTag != null)
* {
* return true;
* }
* }
* return false;
* }).FirstOrDefault();
* //*/
object service = ONSHelper.ONSConsumerServiceList.Where(s => s.GetType().Name == classType.Name).FirstOrDefault();
//如果消费者服务类实例存在则消费消息
if (service != null)
{
//获取消费服务类的核心方法（即开发者自己实现的方法）
method = service.GetType().FullName + ".ProcessCore";
//获取内部方法（此方法是受保护的，因此获取MethodInfo复杂一些）
MethodInfo methodInfo = service.GetType().GetMethod("InternalProcess", BindingFlags.NonPublic | BindingFlags.Instance);
//获取参数列表，实际就一个泛型T参数
ParameterInfo[] parameterInfos = methodInfo.GetParameters();
//判断类型
if (parameterInfos[0].ParameterType.ToString().ToLower() == "system.string")
{
//string类型
parameter = body;
}
else
{
//自定义类型
parameter = JsonConvert.DeserializeObject(body, parameterInfos[0].ParameterType);
}
//执行InternalProcess方法
needToCommit = (bool)methodInfo.Invoke(service, new object[] { parameter });
if (needToCommit == false)
{
failureReason = method + "执行返回false，可能是该方法逻辑上返回false，也可能是该方法执行时它自己捕捉到错误返回false";
}
}
else
{
//找不到消费者实例对象
DebugUtil.Debug("MESSAGE_KEY:" + key + ",找不到消费者实例，topic：" + topic + "，tag：" + tag + "");
}
}
catch (Exception e)
{
failureReason = "尝试消费时，key=" + key + "，捕获异常：" + e.ToString();
//DebugUtil.Debug(e.ToString());
}
//*/
//尝试记录消费信息
try
{
RedisTool RT = new RedisTool(_AliyunOnsRedisDbNumber, _RedisExchangeHosts);
if (RT != null)
{
string consumedTimesKey = key + "_" + cid + "_consumedtimes";
string consumedTimesValue = RT.StringGet(consumedTimesKey);
if (string.IsNullOrEmpty(consumedTimesValue))
{
//不存在key，则新增
consumedTimes++;
bool isSaved = RT.StringSet(consumedTimesKey, consumedTimes, TimeSpan.FromSeconds(_AliyunOnsRedisServiceResultExpireIn));
if (!isSaved)
{
//设置消费次数失败
failureReason = "设置消费次数失败。";
}
}
else
{
//存在key，则递增
int.TryParse(consumedTimesValue, out consumedTimes);
consumedTimes++;
RT.StringIncrement(consumedTimesKey);
}
}
else
{
failureReason = "尝试通过redis更新生产方法执行次数时，无法实例化redis工具类，可能是redis服务暂不可用。";
}
}
catch (Exception e)
{
failureReason = "尝试通过redis更新生产方法执行次数时，捕捉异常：" + e.ToString();
//DebugUtil.Debug(e.ToString());
}
finally
{
try
{
//写ConsumerData数据
ConsumerData consumerData = new ConsumerData(requestTraceId);
//string data;
consumerData.ApplicationAlias = _ApplicationAlias;
consumerData.Accomplishment = needToCommit;
consumerData.Topic = topic;
consumerData.Tag = tag;
consumerData.ProducerId = pid;
consumerData.ConsumerId = cid;
consumerData.Key = key;
consumerData.Type = type;
consumerData.Message = body;
consumerData.Method = method;
consumerData.FailureReason = failureReason;
consumerData.ConsumedStatus = needToCommit ? "Commit" : "Reconsume";
consumerData.ConsumedTimes = consumedTimes;
consumerData.ShardingKey = shardingKey;
NestDataHelper.WriteData(consumerData);
}
catch (Exception e)
{
ONSHelper.SendDebugMail(_Environment + "." + _ApplicationAlias + "环境发送下游消费日志失败", "消息key:" + key + "，错误信息如下：" + e.ToString());
}
}
return(needToCommit);
}
/// <summary>
/// 生成消费者实例
/// </summary>
/// <typeparam name="T">消费者服务基类类型</typeparam>
/// <param name="assembly">消费者服务类所在程序集</param>
/// <param name="type">消费者服务类的类型</param>
/// <param name="messageType">消息类型BASE，ORDER，TRAN</param>
/// <param name="func">生成消费者实例的委托代码</param>
internal static void CreateConsumer <T>(Assembly assembly, Type type, ONSMessageType messageType, Func <ONSFactoryProperty, string, string, Type, IONSConsumer> func)
{
if (type.BaseType.FullName.IndexOf(typeof(T).Name) >= 0)
{
//添加到消费者服务类实例列表
//ONSConsumerServiceList.Add(type);
object service = assembly.CreateInstance(type.FullName);
ONSConsumerServiceList.Add(service);
//获取服务接口
IAbstractConsumerService iservice = (IAbstractConsumerService)service;
//获取枚举数组对象
Enum[] topicTagList = iservice.TopicTagList;
if (topicTagList != null && topicTagList.Length > 0)
{
foreach (Enum topicTag in topicTagList)
{
string serviceTopic = topicTag.GetType().Name;
string serviceTag = topicTag.ToString();
string className = type.Name;
string topic = (_Environment + "_" + serviceTopic).ToUpper();
//CID修改成GID
//string consumerId = ("CID_" + topic + "_" + _ApplicationAlias + "_" + className).ToUpper();
string consumerId = ("GID_" + topic + "_" + _ApplicationAlias + "_" + className).ToUpper();
DebugUtil.Debug("consumerId:" + consumerId);
IONSConsumer consumer = ONSConsumerList.Where(c => c.Type == messageType.ToString() && c.ConsumerId == consumerId).FirstOrDefault();
if (consumer == null)
{
//实例化ONSFactoryProperty
ONSFactoryProperty onsConsumerFactoryProperty = new ONSFactoryProperty();
onsConsumerFactoryProperty.setFactoryProperty(ONSFactoryProperty.AccessKey, _AliyunOnsAccessKey);
onsConsumerFactoryProperty.setFactoryProperty(ONSFactoryProperty.SecretKey, _AliyunOnsSecretKey);
onsConsumerFactoryProperty.setFactoryProperty(ONSFactoryProperty.ConsumerId, consumerId);
//onsConsumerFactoryProperty.setFactoryProperty(ONSFactoryProperty.PublishTopics, _ONSTopic);
if (_AliyunOnsConsumerLogPath != "")
{
if (Directory.Exists(_AliyunOnsConsumerLogPath))
{
onsConsumerFactoryProperty.setFactoryProperty(ONSFactoryProperty.LogPath, _AliyunOnsConsumerLogPath);
}
}
//获取消费者IONSConsumer
consumer = func(onsConsumerFactoryProperty, topic, consumerId, type);
//记录消费者初始化信息
DebugUtil.Debug("Topic：" + topic + "，ConsumerId（" + consumer.Type + "）：" + consumer.ConsumerId + "消费者.new()");
//新增代理类ONSConsumer实例到ONSConsumerList中
ONSConsumerList.Add(consumer);
}
if (!consumer.TagList.Contains(serviceTag))
{
consumer.TagList.Add(serviceTag);
}
}
}
}
}
public override TransactionStatus check(Message value)
{
Console.WriteLine("check topic: {0}, tag:{1}, key:{2}, msgId:{3},msgbody:{4}, userProperty:{5}",
value.getTopic(), value.getTag(), value.getKey(), value.getMsgID(), value.getBody(), value.getUserProperties("VincentNoUser"));
// 消息 ID(有可能消息体一样，但消息 ID 不一样。当前消息 ID 在控制台无法查询)
//string msgId = value.getMsgID();
// 消息体内容进行 crc32, 也可以使用其它的如 MD5
// 消息 ID 和 crc32id 主要是用来防止消息重复
// 如果业务本身是幂等的， 可以忽略，否则需要利用 msgId 或 crc32Id 来做幂等
// 如果要求消息绝对不重复，推荐做法是对消息体 body 使用 crc32或 md5来防止重复消息
string transactionType = "Checker";
bool serviceResult = false;
TransactionStatus transactionStatus = TransactionStatus.Unknow;
string failureReason = "";
string topic = "";
string tag = "";
string pid = "";
string key = "";
string body = "";
string checkerMethodParameter = "";
string method = "";
string requestTraceId = "";
string producedTimesKey = "";
int producedTimes = 0;
try
{
topic = value.getTopic();
tag = value.getTag();
pid = "PID_" + value.getTopic().ToUpper();
key = value.getKey();
body = value.getMsgBody();
requestTraceId = value.getUserProperties("requestTraceId") ?? "";
checkerMethodParameter = Base64Util.Decode(body);
producedTimesKey = key + ":" + _ApplicationAlias + ":producedtimes";
DebugUtil.Debug("MESSAGE_KEY:" + value.getKey() + ",ONSLocalTransactionChecker.check.key " + key);
/*在LocalTransactionExecuterExecute.execute方法中返回unknown，之后会调用LocalTransactionChecker.check方法
* 如果此消息topic被多个网站用作生产者，那么会导致此message会被随即传递到其他网站或当前网站中去时长调用check方法
* 这种传递紊乱的情况可以称为“同topic被多站点作为生产者导致check紊乱的现象”
* 因此如果被传递到其他网站后，需要判断当前网站是否是消息的来源网站，如果不是则返回unknown，也不记录任何记录。
* 如果按同topic被5个网站作为生产者，那么当execute或check出错后，能正确来到消息原始网站的概率为20%，而每次调用check历经5秒
* 假设是随即平均发送到5个网站随即一个中，那么平均需要历经25秒后，才能来到原始网站，因此能来到消息原始网站的平均等待时间的公式为
* time=n*5秒，此处n为使用该topic的网站个数。
* //*/
int applicationAliasLength = _ApplicationAlias.Length;
if (key.Substring(2, applicationAliasLength) != _ApplicationAlias)
{
return(transactionStatus);
}
DebugUtil.Debug("MESSAGE_KEY:" + value.getKey() + ",ONSLocalTransactionChecker.check.after try...");
DebugUtil.Debug("MESSAGE_KEY:" + value.getKey() + ",ONSLocalTransactionChecker.check.checkerMethod " + value.getUserProperties("checkerMethod"));
DebugUtil.Debug("MESSAGE_KEY:" + value.getKey() + ",ONSLocalTransactionChecker.check.checkerMethodParameter " + value.getUserProperties("checkerMethodParameter"));
if (ONSHelper.CheckerMethodDictionary.ContainsKey(value.getUserProperties("checkerMethod")))
{
MethodInfo methodInfo = ONSHelper.CheckerMethodDictionary[value.getUserProperties("checkerMethod")];
Type type = methodInfo.ReflectedType;
Assembly assembly = Assembly.GetAssembly(type);
object service = assembly.CreateInstance(type.FullName);
ParameterInfo[] parameterInfos = methodInfo.GetParameters();
//DebugUtil.Log(parameterInfos[0].ParameterType.ToString());
method = type.FullName + ".ProcessCore";
//判断类型
if (parameterInfos[0].ParameterType.ToString().ToLower() == "system.string")
{
//string类型
serviceResult = (bool)methodInfo.Invoke(service, new object[] { checkerMethodParameter });
}
else
{
//自定义类型
object parameter = JsonConvert.DeserializeObject(checkerMethodParameter, parameterInfos[0].ParameterType);
serviceResult = (bool)methodInfo.Invoke(service, new object[] { parameter });
}
//DebugUtil.Log("MESSAGE_KEY:" + value.getKey() + ",ONSLocalTransactionChecker.check.body:" + body);
if (serviceResult)
{
// 本地事务成功则提交消息
transactionStatus = TransactionStatus.CommitTransaction;
}
else
{
// 本地事务失败则回滚消息
transactionStatus = TransactionStatus.RollbackTransaction;
failureReason = method + "执行返回serviceResult为false，可能是该方法逻辑上返回serviceResult为false，也可能是该方法执行时它自己捕捉到错误返回serviceResult为false";
}
}
else
{
// 不存在key则回滚消息，这里不能用RollbackTransaction，因为我们使用相同的topic在各个网站之间，这种机制会导致其他网站也会调用check方法，一旦RollbackTransaction，那么原先的网站不再重试调用check方法了，因此必须返回unknow
transactionStatus = TransactionStatus.Unknow;
failureReason = "CheckerFuncDictionary中不存在key:" + value.getUserProperties("checkerMethod");
DebugUtil.Debug("MESSAGE_KEY:" + value.getKey() + ",ONSLocalTransactionChecker.check.error:CheckerFuncDictionary中不存在key:" + value.getUserProperties("checkerMethod"));
}
//在写log之前先做base64解密
body = Base64Util.Decode(body);
//事务已经执行，尝试通过redis更新生产方法执行次数，此处如果出错是可以容忍的，但是得把错误信息记录到ProduceData中
RedisTool RT = new RedisTool(_AliyunOnsRedisDbNumber, _RedisExchangeHosts);
if (RT != null)
{
try
{
//获取已经生产次数
string producedTimesValue = RT.StringGet(producedTimesKey);
//如果取不到
if (string.IsNullOrEmpty(producedTimesValue))
{
//不存在key，则新增
producedTimes++;
bool isSaved = RT.StringSet(producedTimesKey, producedTimes, TimeSpan.FromSeconds(_AliyunOnsRedisServiceResultExpireIn));
if (!isSaved)
{
transactionStatus = TransactionStatus.Unknow;
}
}
else
{
//存在key，则递增
int.TryParse(producedTimesValue, out producedTimes);
producedTimes++;
RT.StringIncrement(producedTimesKey);
}
}
catch (Exception e)
{
throw new Exception("事务已经执行，返回" + serviceResult + "。但是尝试通过redis更新生产方法执行次数时，捕捉异常：" + e.ToString());
}
}
else
{
//redis有问题，导致无法实例化工具类
throw new Exception("事务已经执行，返回" + serviceResult + "。但是尝试通过redis更新生产方法执行次数时，无法实例化redis工具类，可能是redis服务暂不可用。");
}
}
catch (Exception e)
{
failureReason = "事务消息在执行Checker.check方法时捕获异常：" + e.ToString();
DebugUtil.Debug(e.ToString());
}
finally
{
ProducerData producerData = new ProducerData(requestTraceId);
producerData.Accomplishment = transactionStatus != TransactionStatus.Unknow;
producerData.ApplicationAlias = _ApplicationAlias;
producerData.Topic = topic;
producerData.Tag = tag;
producerData.ProducerId = pid;
producerData.Key = key;
producerData.Type = ONSMessageType.TRAN.ToString();
producerData.Message = checkerMethodParameter;
producerData.TransactionType = transactionType;
producerData.Method = method;
producerData.ServiceResult = serviceResult;
producerData.TransactionStatus = transactionStatus.ToString();
producerData.FailureReason = failureReason;
producerData.ProducedTimes = producedTimes;
producerData.ShardingKey = "";
NestDataHelper.WriteData(producerData);
}
return(transactionStatus);
}