framework/SpringCloud/ribbon/ribbon名词

Ribbon名词

SpringClientFactory

/*
创建 客户端，负载平衡器和客户端配置 实例 的工厂。它为每个客户端名称创建一个Spring ApplicationContext，并从中提取它所需的beans。
A factory that creates client, load balancer and client configuration instances. It creates a Spring ApplicationContext per client name, and extracts the beans that it needs from there.
*/

这个工厂会为每一个 不同名字的客户端创建一个上下文对象
    
    例如一个服务名 service-file 那么他就对应一个容器
    
    
protected AnnotationConfigApplicationContext createContext(String name) {
		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
		if (this.configurations.containsKey(name)) {
			for (Class<?> configuration : this.configurations.get(name)
					.getConfiguration()) {
				context.register(configuration);
			}
		}
		for (Map.Entry<String, C> entry : this.configurations.entrySet()) {
			if (entry.getKey().startsWith("default.")) {
				for (Class<?> configuration : entry.getValue().getConfiguration()) {
					context.register(configuration);
				}
			}
		}
		context.register(PropertyPlaceholderAutoConfiguration.class,
				this.defaultConfigType);
		context.getEnvironment().getPropertySources().addFirst(new MapPropertySource(
				this.propertySourceName,
				Collections.<String, Object>singletonMap(this.propertyName, name)));
		if (this.parent != null) {
			// Uses Environment from parent as well as beans
			context.setParent(this.parent);
			// jdk11 issue
			// https://github.com/spring-cloud/spring-cloud-netflix/issues/3101
			context.setClassLoader(this.parent.getClassLoader());
		}
		context.setDisplayName(generateDisplayName(name));
		context.refresh();
		return context;
	}

ClientHttpRequestFactory

/*
 Factory for {@link ClientHttpRequest} objects.
 * Requests are created by the {@link #createRequest(URI, HttpMethod)} method.
 
 是一个ClientHttpRequest对象的工厂，通过createRequest(URI, HttpMethod)方法来创建 request
 
 
*/

ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException;

RibbonClientHttpRequestFactory

RibbonClientHttpRequestFactory 实现ClientHttpRequestFactory
    
  private final SpringClientFactory clientFactory;  
public ClientHttpRequest createRequest(URI originalUri, HttpMethod httpMethod)
			throws IOException {
		String serviceId = originalUri.getHost();
		if (serviceId == null) {
			throw new IOException(
					"Invalid hostname in the URI [" + originalUri.toASCIIString() + "]");
		}
		IClientConfig clientConfig = this.clientFactory.getClientConfig(serviceId);
		RestClient client = this.clientFactory.getClient(serviceId, RestClient.class);
		HttpRequest.Verb verb = HttpRequest.Verb.valueOf(httpMethod.name());

		return new RibbonHttpRequest(originalUri, verb, client, clientConfig);
	}

IClientConfig

/*
定义了各种API用于初始化客户端或负载平衡器以及执行方法的客户端配置。默认实现是{@link Defaultclientconfigimpl}。

 Defines the client configuration used by various APIs to initialize clients or load balancers and for method execution. The default implementation is {@link DefaultClientConfigImpl}.
*/

IRule

/*
接口，用于定义负载平衡器的“规则”。规则可以被认为是载荷平衡的策略。众所周知的负载平衡策略包括循环，基于响应时间的等。

Interface that defines a "Rule" for a LoadBalancer. A Rule can be thought of as a Strategy for loadbalacing. Well known loadbalancing strategies include Round Robin, Response Time based etc.

*/
    public Server choose(Object key);
    
    public void setLoadBalancer(ILoadBalancer lb);
    
    public ILoadBalancer getLoadBalancer();

ILoadBalancer

/*
定义软件loadbalancer操作的接口。典型的loadbalancer最少需要一组服务器来进行loadbalance，一种标记特定服务器旋转不良的方法以及一个将从现有服务器列表中选择服务器的调用。

Interface that defines the operations for a software loadbalancer. A typical loadbalancer minimally need a set of servers to loadbalance for, a method to mark a particular server to be out of rotation and a call that will choose a server from the existing list of server.

*/

IPing

接口，定义了我们如何“ping”一个服务器来检查它是否还活着
public interface IPing {
    
    /**
     * Checks whether the given <code>Server</code> is "alive" i.e. should be
     * considered a candidate while loadbalancing
     * 
     */
    public boolean isAlive(Server server);
}

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• 本文作者： 忘忧症
• 本文链接： https://NepenthesZGW.github.io/2020/08/10/framework/SpringCloud/ribbon/ribbon名词/
• 版权声明： 本博客所有文章除特别声明外，均采用 MIT 许可协议。转载请注明出处！