C# 如何覆盖MassTransit默认exchange和队列拓扑约定?
正如[在我关于SO的一个问题中]()所指出的,MassTransit for RabbitMQ会自动为给定的简单配置创建一定数量的队列和交换: 交易所,所有球迷:C# 如何覆盖MassTransit默认exchange和队列拓扑约定?,c#,.net-core,rabbitmq,masstransit,C#,.net Core,Rabbitmq,Masstransit,正如[在我关于SO的一个问题中]()所指出的,MassTransit for RabbitMQ会自动为给定的简单配置创建一定数量的队列和交换: 交易所,所有球迷: ConsoleApp1:ProgramyourMessage:持久 VP0003748\u dotnet\u bus\u 6n9oyyfzxhyx9ybobdmpj8qeyt:自动删除和持久 测试队列:持久 队列: VP0003748\u dotnet\u bus\u 6n9oyyfzxhyx9ybobdmpj8qeyt:x-6
:持久ConsoleApp1:ProgramyourMessage
:自动删除和持久VP0003748\u dotnet\u bus\u 6n9oyyfzxhyx9ybobdmpj8qeyt
:持久测试队列
:x-60000VP0003748\u dotnet\u bus\u 6n9oyyfzxhyx9ybobdmpj8qeyt
:持久测试队列
test\u queue
因为这是我认为足够公平的事情。
类型很容易进行更改/重构。这是一种简单有效的方法: 但最好在这里删除一些dotnet核心代码,以帮助任何一个刚起步的人 我们基于配置的自定义格式化程序:
public class BusEnvironmentNameFormatter : IEntityNameFormatter
{
private readonly IEntityNameFormatter _original;
private readonly string _prefix;
public BusEnvironmentNameFormatter(IEntityNameFormatter original, SomeAppSettingsSection busSettings)
{
_original = original;
_prefix = string.IsNullOrWhiteSpace(busSettings.Environment)
? string.Empty // no prefix
: $"{busSettings.Environment}:"; // custom prefix
}
// Used to rename the exchanges
public string FormatEntityName<T>()
{
var original = _original.FormatEntityName<T>();
return Format(original);
}
// Use this one to rename the queue
public string Format(string original)
{
return string.IsNullOrWhiteSpace(_prefix)
? original
: $"{_prefix}{original}";
}
}
公共类BusEnvironmentNameFormatter:IEntityNameFormatter
{
私有只读IEntityNameFormatter_原件;
私有只读字符串_前缀;
公共总线环境名称格式化程序(IEntityNameFormatter原件,SomeAppSettingsSection总线设置)
{
_原件=原件;
_prefix=string.IsNullOrWhiteSpace(busSettings.Environment)
?string.Empty//无前缀
:$“{busSettings.Environment}:;//自定义前缀
}
//用于重命名交易所
公共字符串FormattEntityName()
{
var original=_original.formattentityname();
返回格式(原件);
}
//使用此选项可以重命名队列
公共字符串格式(原始字符串)
{
返回字符串.IsNullOrWhiteSpace(_前缀)
起初的
:$“{u前缀}{original}”;
}
}
然后使用它,我们会做如下操作:
var busSettings = busConfigSection.Get<SomeAppSettingsSection>();
var rabbitMqSettings = rabbitMqConfigSection.Get<SomeOtherAppSettingsSection>();
services.AddMassTransit(scConfig =>
{
scConfig.AddConsumers(consumerAssemblies);
scConfig.AddBus(provider => Bus.Factory.CreateUsingRabbitMq(rmqConfig =>
{
rmqConfig.UseExtensionsLogging(provider.GetRequiredService<ILoggerFactory>());
// Force serialization of default values: null, false, etc
rmqConfig.ConfigureJsonSerializer(jsonSettings =>
{
jsonSettings.DefaultValueHandling = DefaultValueHandling.Include;
return jsonSettings;
});
var nameFormatter = new BusEnvironmentNameFormatter(rmqConfig.MessageTopology.EntityNameFormatter, busSettings);
var host = rmqConfig.Host(new Uri(rabbitMqSettings.ConnectionString), hostConfig =>
{
hostConfig.Username(rabbitMqSettings.Username);
hostConfig.Password(rabbitMqSettings.Password);
});
// Endpoint with custom naming
rmqConfig.ReceiveEndpoint(host, nameFormatter.Format(busSettings.Endpoint), epConfig =>
{
epConfig.PrefetchCount = busSettings.MessagePrefetchCount;
epConfig.UseMessageRetry(x => x.Interval(busSettings.MessageRetryCount, busSettings.MessageRetryInterval));
epConfig.UseInMemoryOutbox();
//TODO: Bind messages to this queue/endpoint
epConfig.MapMessagesToConsumers(provider, busSettings);
});
// Custom naming for exchanges
rmqConfig.MessageTopology.SetEntityNameFormatter(nameFormatter);
}));
});
var-busSettings=busConfigSection.Get();
var rabbitMqSettings=rabbitMqConfigSection.Get();
services.AddMassTransit(scConfig=>
{
scConfig.AddConsumers(consumerAssemblies);
scConfig.AddBus(provider=>Bus.Factory.CreateUsingRabbitMq(rmqConfig=>
{
rmqConfig.UseExtensionsLogging(provider.GetRequiredService());
//强制序列化默认值:null、false等
rmqConfig.ConfigureJsonSerializer(jsonSettings=>
{
jsonSettings.DefaultValueHandling=DefaultValueHandling.Include;
返回jsonSettings;
});
var nameFormatter=新的总线环境nameFormatter(rmqConfig.MessageTopology.EntityNameFormatter,总线设置);
var host=rmqConfig.host(新Uri(rabbitMqSettings.ConnectionString),hostConfig=>
{
Username(rabbitMqSettings.Username);
hostConfig.Password(rabbitMqSettings.Password);
});
//具有自定义命名的端点
rmqConfig.ReceiveEndpoint(主机,nameFormatter.Format(busSettings.Endpoint),epConfig=>
{
epConfig.PrefetchCount=busSettings.MessagePrefetchCount;
epConfig.UseMessageRetry(x=>x.Interval(busSettings.MessageRetryCount,busSettings.MessageRetryInterval));
epConfig.UseInMemoryOutbox();
//TODO:将消息绑定到此队列/端点
epConfig.MapMessagesToConsumers(提供程序、总线设置);
});
//交换的自定义命名
rmqConfig.MessageTopology.SetEntityNameFormatter(nameFormatter);
}));
});
队列的名称可以通过以下方式使用IRabbitMqBusFactoryConfigurator的OverridedFaultBusEndpointQueueName方法更改
var bus = Bus.Factory.CreateUsingRabbitMq(sbc =>
{
sbc.Host("rabbitmq://localhost/");
sbc.OverrideDefaultBusEndpointQueueName("endpoint");
});
您可能会阅读文档:and@Chris Patterson文档没有说明如何更改临时交换/队列,例如
VP0003748\u dotnet\u bus\u 7qyyyyyfxhbykj9dbdmpks5xd5
VP0003748\u dotnet\u bus\u 7qyyyyyyfxhbykj9dbdmpks5xd5