1. 微服务间通信的挑战与选型
  2. Feign:声明式HTTP客户端设计

   2.1 Feign基础配置与集成

   2.2 大模型服务调用的请求封装

   2.3 超时与重试策略

  1. gRPC:高性能协议缓冲区通信

   3.1 Protobuf定义与代码生成

   3.2 大模型服务的gRPC服务端实现

   3.3 gRPC客户端调用与负载均衡

  1. Feign与gRPC对比选型

   4.1 性能对比

   4.2 可维护性对比

   4.3 适用场景分析

  1. 混合通信架构设计
  2. 容错与降级策略
  3. 总结

在大模型驱动的微服务架构中,各个独立服务之间需要频繁地进行调用。例如,一个对话管理服务需要调用模型推理服务、向量检索服务需要调用嵌入模型服务、任务编排服务需要调用多个下游LLM服务。这些服务间的通信设计直接影响系统的性能、可靠性和可维护性。

微服务间通信面临以下核心挑战。第一,大模型推理请求的数据量较大,一次请求可能包含数百个token的上下文信息,响应体可能达数千个token。第二,推理服务的响应时间从几百毫秒到几十秒不等,对超时控制要求严格。第三,在大规模并发场景下,连接管理与资源消耗成为瓶颈。第四,不同服务可能使用不同的技术栈,需要统一的通信协议。

Java生态中,微服务间通信主要有两种主流方案。方案一,基于HTTP的声明式客户端Spring Cloud OpenFeign,以RESTful风格定义接口、JSON序列化数据。方案二,基于gRPC框架,使用Protocol Buffers定义接口、二进制序列化数据。两种方案各有优劣,本章将深入分析其设计原理与最佳实践。

选择通信方案时需要考量几个关键因素:数据序列化效率决定了传输带宽和CPU开销;连接复用能力影响高并发场景下的吞吐量;流式传输支持对于大模型流式输出的场景至关重要;生态集成度决定了开发效率和运维成本;类型安全保证减少运行时错误。

本文将从实际生产环境出发,结合代码示例展示如何在大模型微服务拆分场景下,合理设计和选择通信方案。

2.1 Feign基础配置与集成

Spring Cloud OpenFeign 是声明式Web服务客户端,它让编写Web服务客户端变得更简单。开发者只需创建一个接口并添加注解即可完成服务调用,无需手动构建HTTP请求。

基础依赖配置如下:

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

启动类添加 `@EnableFeignClients` 注解激活Feign:

@SpringBootApplication
@EnableFeignClients(basePackages = "com.example.llm.client")
public class LlmGatewayApplication {
    public static void main(String[] args) {
        SpringApplication.run(LlmGatewayApplication.class, args);
    }
}

Feign的核心配置项包括连接超时、读取超时、日志级别、编码器和解码器等。针对大模型服务调用,需要特别关注超时设置,因为推理请求的响应时间可能较长。

spring:
  cloud:
    openfeign:
      client:
        config:
          llm-inference-service:
            connect-timeout: 5000
            read-timeout: 120000
            logger-level: full
      compression:
        request:
          enabled: true
          mime-types: application/json
          min-request-size: 2048
        response:
          enabled: true

这里将读取超时设置为120秒,因为大模型推理可能需要较长时间。同时启用请求和响应的Gzip压缩,减少网络传输的数据量。对于大模型的出入参,压缩可以显著减少带宽消耗,通常能压缩至原始大小的20%到30%。

2.2 大模型服务调用的请求封装

定义大模型推理服务的Feign接口时,需要仔细设计请求和响应对象。以下是一个典型的LLM推理服务Feign客户端示例:

@FeignClient(
    name = "llm-inference-service",
    url = "${llm.inference.url}",
    configuration = LlmFeignConfig.class
)
public interface LlmInferenceClient {
    @PostMapping("/v1/chat/completions")
    ChatResponse chatCompletion(@RequestBody ChatRequest request);
    @PostMapping("/v1/embeddings")
    EmbeddingResponse getEmbeddings(@RequestBody EmbeddingRequest request);
    @GetMapping("/v1/models")
    List<ModelInfo> listModels();
}

请求对象的封装需要特别注意序列化兼容性。使用Lombok结合Jackson注解减少样板代码:

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@JsonInclude(JsonInclude.Include.NON_NULL)
public class ChatRequest {
    private String model;
    @JsonProperty("messages")
    private List<ChatMessage> messages;
    @JsonProperty("max_tokens")
    private Integer maxTokens;
    @JsonProperty("temperature")
    private Double temperature;
    @JsonProperty("top_p")
    private Double topP;
    @JsonProperty("stream")
    private Boolean stream;
    @JsonProperty("stop")
    private List<String> stop;
}
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class ChatMessage {
    private String role;
    private String content;
    @JsonProperty("name")
    @JsonInclude(JsonInclude.Include.NON_NULL)
    private String name;
}

在实际调用中,通过服务层封装Feign客户端,添加业务逻辑处理。以下是一个封装了重试和降级逻辑的调用服务:

@Service
@Slf4j
public class LlmInferenceService {
    private final LlmInferenceClient client;
    public LlmInferenceService(LlmInferenceClient client) {
        this.client = client;
    }
    public ChatResponse chat(String model, List<ChatMessage> messages) {
        ChatRequest request = ChatRequest.builder()
            .model(model)
            .messages(messages)
            .maxTokens(4096)
            .temperature(0.7)
            .build();
        long start = System.currentTimeMillis();
        try {
            ChatResponse response = client.chatCompletion(request);
            long elapsed = System.currentTimeMillis() - start;
            log.info("LLM inference completed in {}ms, tokens: {}",
                elapsed, response.getUsage().getTotalTokens());
            return response;
        } catch (FeignException e) {
            log.error("LLM inference failed: status={}, message={}",
                e.status(), e.getMessage());
            throw new LlmServiceException("LLM调用失败", e);
        }
    }
}

2.3 超时与重试策略

大模型服务的超时处理与普通微服务有显著不同。普通API调用通常在秒级完成,而大模型推理可能需要数十秒甚至更长。因此,需要设计分层超时策略。

第一层是连接超时,通常设为3到5秒,超过此时间未能建立连接则快速失败。第二层是读取超时,根据模型类型和预期输出长度设置。对于生成类模型,按预估token产出速率(如每秒20到30个token)乘以最大token数计算超时时间。第三层是整体请求超时,作为兜底保护。

@Configuration
public class LlmFeignConfig {
    @Bean
    public Request.Options requestOptions(
            @Value("${llm.client.connect-timeout:5000}") int connectTimeout,
            @Value("${llm.client.read-timeout:300000}") int readTimeout) {
        return new Request.Options(connectTimeout,
            TimeUnit.MILLISECONDS, readTimeout, TimeUnit.MILLISECONDS, true);
    }
    @Bean
    public Retryer retryer() {
        // 大模型调用重试需谨慎,避免重复消费
        return new Retryer.Default(1000, 2000, 2);
    }
}

重试策略需要格外谨慎。大模型请求可能已经部分执行,重试可能导致重复消费token或产生副作用。建议仅对连接超时和5xx服务器错误进行重试,对4xx客户端错误和读取超时不重试。可以通过自定义重试器实现:

public class LlmRetryer implements Retryer {
    private final int maxAttempts;
    private int attempt = 0;
    public LlmRetryer(int maxAttempts) {
        this.maxAttempts = maxAttempts;
    }
    @Override
    public void continueOrPropagate(RetryableException e) {
        if (++attempt > maxAttempts) {
            throw e;
        }
        if (e.status() >= 400 && e.status() < 500) {
            throw e; // 客户端错误不重试
        }
        long interval = (long) Math.pow(2, attempt) * 1000L;
        try {
            Thread.sleep(interval);
        } catch (InterruptedException ie) {
            Thread.currentThread().interrupt();
            throw e;
        }
    }
    @Override
    public Retryer clone() {
        return new LlmRetryer(maxAttempts);
    }
}

3.1 Protobuf定义与代码生成

gRPC基于Protocol Buffers作为接口定义语言和底层消息交换格式。在定义大模型服务的gRPC接口前,需要设计合理的Protobuf消息结构。以下是LLM推理服务的proto定义示例:

syntax = "proto3";
package com.example.llm.grpc;
option java_multiple_files = true;
option java_package = "com.example.llm.grpc.proto";
service LlmInferenceService {
    // 单次对话补全
    rpc ChatCompletion(ChatRequest) returns (ChatResponse);
    // 流式对话补全(服务端流)
    rpc StreamChatCompletion(ChatRequest) returns (stream ChatStreamChunk);
    // 批量嵌入
    rpc GetEmbeddings(EmbeddingRequest) returns (EmbeddingResponse);
    // 获取模型信息
    rpc ListModels(ListModelsRequest) returns (ListModelsResponse);
}
message ChatRequest {
    string model = 1;
    repeated ChatMessage messages = 2;
    int32 max_tokens = 3;
    double temperature = 4;
    double top_p = 5;
    repeated string stop = 6;
}
message ChatMessage {
    string role = 1;
    string content = 2;
}
message ChatResponse {
    string id = 1;
    string model = 2;
    repeated Choice choices = 3;
    Usage usage = 4;
}
message Choice {
    int32 index = 1;
    ChatMessage message = 2;
    string finish_reason = 3;
}
message ChatStreamChunk {
    string id = 1;
    string model = 2;
    repeated StreamChoice choices = 3;
}
message StreamChoice {
    int32 index = 1;
    ChatMessage delta = 2;
    string finish_reason = 3;
}
message Usage {
    int32 prompt_tokens = 1;
    int32 completion_tokens = 2;
    int32 total_tokens = 3;
}

Proto文件的编译依赖于protobuf-maven-plugin:

<plugin>
    <groupId>org.xolstice.maven.plugins</groupId>
    <artifactId>protobuf-maven-plugin</artifactId>
    <version>0.6.1</version>
    <configuration>
        <protocArtifact>com.google.protobuf:protoc:3.21.7:exe:${os.detected.classifier}</protocArtifact>
        <pluginId>grpc-java</pluginId>
        <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.54.0:exe:${os.detected.classifier}</pluginArtifact>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>compile</goal>
                <goal>compile-custom</goal>
            </goals>
        </execution>
    </executions>
</plugin>

执行 `mvn compile` 后,target目录下会生成对应的Java类,包括消息类和gRPC Stub类。

3.2 大模型服务的gRPC服务端实现

gRPC服务端需要继承生成的基类并实现抽象方法。以下是大模型推理服务的gRPC服务端实现:

@GrpcService
@Slf4j
public class LlmInferenceGrpcService
        extends LlmInferenceServiceGrpc.LlmInferenceServiceImplBase {
    private final ModelExecutor modelExecutor;
    public LlmInferenceGrpcService(ModelExecutor modelExecutor) {
        this.modelExecutor = modelExecutor;
    }
    @Override
    public void chatCompletion(ChatRequest request,
            StreamObserver<ChatResponse> responseObserver) {
        try {
            List<Message> messages = convertToInternalMessages(request.getMessagesList());
            CompletionResult result = modelExecutor.execute(
                request.getModel(), messages, request.getMaxTokens(),
                request.getTemperature(), request.getTopP());
            ChatResponse response = buildResponse(result);
            responseObserver.onNext(response);
            responseObserver.onCompleted();
        } catch (Exception e) {
            log.error("gRPC chat completion failed", e);
            responseObserver.onError(Status.INTERNAL
                .withDescription(e.getMessage()).asRuntimeException());
        }
    }
    @Override
    public void streamChatCompletion(ChatRequest request,
            StreamObserver<ChatStreamChunk> responseObserver) {
        List<Message> messages = convertToInternalMessages(request.getMessagesList());
        modelExecutor.executeStream(request.getModel(), messages,
            request.getMaxTokens(), request.getTemperature(), request.getTopP(),
            new StreamCallback() {
                @Override
                public void onToken(String token, int index) {
                    ChatStreamChunk chunk = ChatStreamChunk.newBuilder()
                        .setId(UUID.randomUUID().toString())
                        .setModel(request.getModel())
                        .addChoices(StreamChoice.newBuilder()
                            .setIndex(index)
                            .setDelta(ChatMessage.newBuilder()
                                .setRole("assistant")
                                .setContent(token)
                                .build())
                            .build())
                        .build();
                    responseObserver.onNext(chunk);
                }
                @Override
                public void onComplete(String finishReason) {
                    responseObserver.onCompleted();
                }
                @Override
                public void onError(Throwable t) {
                    responseObserver.onError(Status.INTERNAL
                        .withDescription(t.getMessage()).asRuntimeException());
                }
            });
    }
}

服务端的拦截器可以统一处理认证、日志、限流等横切关注点:

@GrpcGlobalInterceptor
public class GrpcLoggingInterceptor implements ServerInterceptor {
    @Override
    public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(
            ServerCall<ReqT, RespT> call, Metadata headers,
            ServerCallHandler<ReqT, RespT> next) {
        String method = call.getMethodDescriptor().getFullMethodName();
        long startTime = System.currentTimeMillis();
        ServerCall.Listener<ReqT> listener = next.startCall(
            new ForwardingServerCall.SimpleForwardingServerCall<ReqT, RespT>(call) {
                @Override
                public void close(Status status, Metadata trailers) {
                    long elapsed = System.currentTimeMillis() - startTime;
                    log.info("gRPC {} completed: status={}, elapsed={}ms",
                        method, status.getCode(), elapsed);
                    super.close(status, trailers);
                }
            }, headers);
        return new ForwardingServerCallListener
            .SimpleForwardingServerCallListener<ReqT>(listener) {};
    }
}

3.3 gRPC客户端调用与负载均衡

gRPC客户端通过Stub进行调用。针对大模型服务,需要配置合适的通道属性和负载均衡策略:

@Configuration
public class GrpcClientConfig {
    @Bean
    public ManagedChannel managedChannel(
            @Value("${grpc.client.llm-inference.host:localhost}") String host,
            @Value("${grpc.client.llm-inference.port:9090}") int port) {
        return ManagedChannelBuilder.forAddress(host, port)
            .usePlaintext()
            .maxInboundMessageSize(16 * 1024 * 1024) // 16MB,支持大响应
            .keepAliveTime(30, TimeUnit.SECONDS)
            .keepAliveTimeout(10, TimeUnit.SECONDS)
            .keepAliveWithoutCalls(true)
            .enableRetry()
            .defaultServiceConfig(buildRetryConfig())
            .build();
    }
    @Bean
    public LlmInferenceServiceGrpc.LlmInferenceServiceStub
            asyncStub(ManagedChannel channel) {
        return LlmInferenceServiceGrpc.newStub(channel)
            .withDeadlineAfter(300, TimeUnit.SECONDS)
            .withWaitForReady();
    }
    private Map<String, Object> buildRetryConfig() {
        Map<String, Object> retryPolicy = new HashMap<>();
        retryPolicy.put("maxAttempts", 3);
        retryPolicy.put("initialBackoff", "1s");
        retryPolicy.put("maxBackoff", "10s");
        retryPolicy.put("backoffMultiplier", 2.0);
        retryPolicy.put("retryableStatusCodes",
            Arrays.asList("UNAVAILABLE", "DEADLINE_EXCEEDED"));
        Map<String, Object> methodConfig = new HashMap<>();
        methodConfig.put("name", Collections.singletonList(
            Collections.singletonMap("service", "com.example.llm.grpc.LlmInferenceService")));
        methodConfig.put("retryPolicy", retryPolicy);
        return Collections.singletonMap("methodConfig",
            Collections.singletonList(methodConfig));
    }
}

在多实例场景下,需要配置客户端负载均衡。可以通过服务发现与NameResolver结合实现:

ManagedChannel channel = ManagedChannelBuilder.forTarget("dns:///llm-inference.internal:9090")
    .defaultLoadBalancingPolicy("round_robin")
    .usePlaintext()
    .build();

异步调用的典型用法:

@Service
public class GrpcLlmClient {
    private final LlmInferenceServiceGrpc.LlmInferenceServiceStub asyncStub;
    private final LlmInferenceServiceGrpc.LlmInferenceServiceBlockingStub blockingStub;
    public CompletableFuture<ChatResponse> chatCompletionAsync(ChatRequest request) {
        CompletableFuture<ChatResponse> future = new CompletableFuture<>();
        StreamObserver<ChatResponse> observer =
            new StreamObserver<ChatResponse>() {
                @Override
                public void onNext(ChatResponse response) {
                    future.complete(response);
                }
                @Override
                public void onError(Throwable t) {
                    future.completeExceptionally(t);
                }
                @Override
                public void onCompleted() {}
            };
        asyncStub.chatCompletion(request, observer);
        return future.orTimeout(300, TimeUnit.SECONDS);
    }
}

4.1 性能对比

在序列化效率上,gRPC的Protocol Buffers二进制序列化体积约为JSON文本序列化的三分之一到五分之一。对于大模型场景下包含大量文本的请求响应,这一差距更为显著。gRPC使用HTTP/2作为传输协议,支持多路复用、头部压缩和服务器推送,在高并发场景下有明显优势。

下表反映了典型的性能差异:

指标

Feign/HTTP+JSON

gRPC/HTTP2+Protobuf

------

----------------

-------------------

序列化速度

中等

快(约3-5倍)

消息体积

大(基准)

小(约1/3-1/5)

连接开销

高(HTTP/1.1)

低(HTTP/2多路复用)

单次RTT

2-10ms

1-3ms

并发1000请求

需大量连接

单连接即可

在1000并发请求的压测中,gRPC通常比Feign的吞吐量高2到3倍,延迟降低40%到60%。对于大模型推理这类计算密集型、响应体较大的场景,gRPC的性能优势尤为突出。

4.2 可维护性对比

Feign的优势在于直观易懂。接口定义使用Java注解,开发者无需学习额外的IDL语言。与Spring生态深度集成,支持断路器、负载均衡、服务发现等组件。调试方便,HTTP请求可通过curl、Postman等工具直接测试。

gRPC虽然性能优异,但学习成本较高。开发者需要掌握Proto3语法和gRPC的服务定义方式。调试相对复杂,需要专用工具如grpcurl或BloomRPC。但gRPC提供的强类型接口定义是一把双刃剑:在编译期就能发现接口不匹配问题,减少了生产环境的运行时错误。

从版本演进角度看,Protobuf的向后兼容机制比JSON更加成熟和可控。通过字段编号和默认值,可以在不破坏旧客户端的情况下添加新字段。这对于微服务独立演进的场景至关重要。

4.3 适用场景分析

根据实践经验,以下场景更适合使用Feign:

第一,对外暴露的API网关层。RESTful API是业界通用的接口风格,第三方集成和前端调用都更自然。

第二,请求响应体较小(小于100KB)的同步调用。如用户认证、配置查询等辅助服务。

第三,团队对gRPC经验不足,追求快速交付的早期阶段。可以先使用Feign快速搭建,后期根据性能需求逐步迁移热路径到gRPC。

以下场景更适合使用gRPC:

第一,大模型推理服务等对性能敏感的核心链路上的调用。推理请求的Payload可能包含完整对话历史,响应包含了大量生成文本。

第二,需要服务端流式推送的场景。虽然Feign也可以通过响应式方式模拟,但gRPC原生支持服务端流、客户端流和双向流,实现更加自然。

第三,内部微服务间的高频、高并发调用。HTTP/2多路复用可以避免HTTP/1.1的连接池瓶颈。

在实际的大模型微服务架构中,往往不会一刀切地选择单一通信方式,而是采用混合架构。外部流量走REST API进入网关,网关内部根据调用特点选择不同的通信协议。

典型的混合架构如下:API网关对外暴露RESTful接口,接收客户端请求。网关内部的轻量级查询(如用户信息、会话状态)通过Feign调用对应服务。核心的模型推理请求通过gRPC调用推理服务集群,充分利用HTTP/2的多路复用和二进制序列化优势。对于流式输出场景,gRPC服务端流或专门的WebSocket通道处理实时推送。

混合架构的实现中,网关层负责协议转换:

@RestController
@RequestMapping("/api/v1")
public class LlmGatewayController {
    private final GrpcLlmClient grpcClient;
    private final RestLlmClient restClient;
    public LlmGatewayController(GrpcLlmClient grpcClient, RestLlmClient restClient) {
        this.grpcClient = grpcClient;
        this.restClient = restClient;
    }
    @PostMapping("/chat/completions")
    public ChatResponse chatCompletion(@RequestBody ChatApiRequest apiRequest) {
        // 将REST请求转换为内部格式
        ChatRequest grpcRequest = convertToGrpcRequest(apiRequest);
        // 根据模型类型路由到不同的后端
        if (isHighPerformanceModel(apiRequest.getModel())) {
            return convertFromGrpc(grpcClient.chatCompletionSync(grpcRequest));
        } else {
            return restClient.chatCompletion(apiRequest);
        }
    }
    @PostMapping("/chat/completions/stream")
    public Flux<ServerSentEvent<ChatStreamChunk>> streamChatCompletion(
            @RequestBody ChatApiRequest apiRequest) {
        return Flux.create(sink -> {
            StreamObserver<ChatStreamChunk> observer =
                new StreamObserver<ChatStreamChunk>() {
                    @Override
                    public void onNext(ChatStreamChunk chunk) {
                        sink.next(ServerSentEvent.builder(chunk).build());
                    }
                    @Override
                    public void onError(Throwable t) {
                        sink.error(t);
                    }
                    @Override
                    public void onCompleted() {
                        sink.complete();
                    }
                };
            ChatRequest grpcRequest = convertToGrpcRequest(apiRequest);
            asyncStub.streamChatCompletion(grpcRequest, observer);
        });
    }
}

这种混合架构兼顾了外部兼容性和内部性能,是一种务实的设计选择。

在大模型微服务调用链中,任何一个环节的失败都可能导致用户体验受损。因此需要建立完善的容错与降级机制。

使用Resilience4j实现断路器模式:

@FeignClient(
    name = "llm-inference-service",
    fallbackFactory = LlmInferenceFallbackFactory.class
)
public interface LlmInferenceClient {
    @PostMapping("/v1/chat/completions")
    ChatResponse chatCompletion(@RequestBody ChatRequest request);
}
@Component
public class LlmInferenceFallbackFactory
        implements FallbackFactory<LlmInferenceClient> {
    @Override
    public LlmInferenceClient create(Throwable cause) {
        return new LlmInferenceClient() {
            @Override
            public ChatResponse chatCompletion(ChatRequest request) {
                log.warn("LLM inference degraded, using fallback", cause);
                return ChatResponse.builder()
                    .content("抱歉,当前服务繁忙,请稍后重试。")
                    .model(request.getModel())
                    .fallback(true)
                    .build();
            }
        };
    }
}

结合Resilience4j的断路器配置:

resilience4j:
  circuitbreaker:
    instances:
      llm-inference:
        sliding-window-size: 10
        minimum-number-of-calls: 5
        failure-rate-threshold: 50
        wait-duration-in-open-state: 30s
        permitted-number-of-calls-in-half-open-state: 3
  retry:
    instances:
      llm-inference:
        max-attempts: 3
        wait-duration: 1s
        retry-exceptions:
          - java.net.ConnectException
          - java.net.SocketTimeoutException

对于gRPC的容错,可以利用gRPC内置的重试机制结合应用层断路器:

@Service
public class ResilientGrpcClient {
    private final CircuitBreaker circuitBreaker;
    private final LlmInferenceServiceGrpc.LlmInferenceServiceBlockingStub stub;
    public ResilientGrpcClient(
            CircuitBreakerRegistry registry,
            LlmInferenceServiceGrpc.LlmInferenceServiceBlockingStub stub) {
        this.circuitBreaker = registry.circuitBreaker("grpc-llm");
        this.stub = stub;
    }
    public ChatResponse chatCompletion(ChatRequest request) {
        return circuitBreaker.executeSupplier(() -> {
            try {
                return stub.chatCompletion(request);
            } catch (StatusRuntimeException e) {
                if (e.getStatus().getCode() == Status.Code.UNAVAILABLE) {
                    throw new UnavailableException("gRPC service unavailable", e);
                }
                throw new RuntimeException(e);
            }
        });
    }
}

在大模型微服务拆分场景下,通信方案选择是架构决策中的关键一环。本章系统介绍了Feign和gRPC两种方案的设计原理、实现方式与适用场景。

核心要点概括如下。第一,Feign适合对外接口和内部轻量调用,开发效率高、生态成熟。第二,gRPC适合性能敏感的核心链路调用,序列化效率高、支持多路复用和原生流式传输。第三,混合架构是实践中常见的选择,通过网关层协议转换兼顾内外需求。第四,容错机制是必要的保障,断路器、重试和降级策略需要结合大模型调用特点精细设计。

在下一章中,我们将讨论异步任务服务的设计,探讨如何将长时推理任务从同步调用中解耦出来,通过消息队列实现任务的异步处理和回调通知。

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