package com.vincent.rsf.server.ai.service.impl;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.vincent.rsf.framework.common.Cools;
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import com.vincent.rsf.framework.exception.CoolException;
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import com.vincent.rsf.server.ai.config.AiDefaults;
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import com.vincent.rsf.server.ai.dto.AiChatDoneDto;
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import com.vincent.rsf.server.ai.dto.AiChatErrorDto;
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import com.vincent.rsf.server.ai.dto.AiChatMemoryDto;
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import com.vincent.rsf.server.ai.dto.AiChatMessageDto;
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import com.vincent.rsf.server.ai.dto.AiChatRequest;
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import com.vincent.rsf.server.ai.dto.AiChatRuntimeDto;
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import com.vincent.rsf.server.ai.dto.AiChatStatusDto;
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import com.vincent.rsf.server.ai.dto.AiChatSessionDto;
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import com.vincent.rsf.server.ai.dto.AiChatSessionPinRequest;
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import com.vincent.rsf.server.ai.dto.AiChatSessionRenameRequest;
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import com.vincent.rsf.server.ai.dto.AiResolvedConfig;
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import com.vincent.rsf.server.ai.entity.AiParam;
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import com.vincent.rsf.server.ai.entity.AiPrompt;
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import com.vincent.rsf.server.ai.entity.AiChatSession;
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import com.vincent.rsf.server.ai.enums.AiErrorCategory;
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import com.vincent.rsf.server.ai.exception.AiChatException;
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import com.vincent.rsf.server.ai.service.AiChatService;
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import com.vincent.rsf.server.ai.service.AiChatMemoryService;
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import com.vincent.rsf.server.ai.service.AiConfigResolverService;
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import com.vincent.rsf.server.ai.service.McpMountRuntimeFactory;
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import io.micrometer.observation.ObservationRegistry;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.ai.chat.messages.AssistantMessage;
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import org.springframework.ai.chat.messages.Message;
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import org.springframework.ai.chat.messages.SystemMessage;
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import org.springframework.ai.chat.messages.UserMessage;
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import org.springframework.ai.chat.metadata.ChatResponseMetadata;
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import org.springframework.ai.chat.metadata.Usage;
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import org.springframework.ai.chat.model.ChatResponse;
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import org.springframework.ai.chat.prompt.Prompt;
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import org.springframework.ai.model.tool.DefaultToolCallingManager;
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import org.springframework.ai.model.tool.ToolCallingManager;
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import org.springframework.ai.openai.OpenAiChatModel;
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import org.springframework.ai.openai.OpenAiChatOptions;
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import org.springframework.ai.openai.api.OpenAiApi;
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import org.springframework.ai.tool.ToolCallback;
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import org.springframework.ai.tool.execution.DefaultToolExecutionExceptionProcessor;
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import org.springframework.ai.tool.resolution.SpringBeanToolCallbackResolver;
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import org.springframework.ai.util.json.schema.SchemaType;
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import org.springframework.context.support.GenericApplicationContext;
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import org.springframework.http.MediaType;
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import org.springframework.http.client.SimpleClientHttpRequestFactory;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.stereotype.Service;
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import org.springframework.util.StringUtils;
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import org.springframework.web.client.RestClient;
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import org.springframework.web.reactive.function.client.WebClient;
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import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
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import reactor.core.publisher.Flux;
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import java.io.IOException;
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import java.time.Instant;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.Executor;
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import java.util.concurrent.atomic.AtomicReference;
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@Slf4j
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@Service
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@RequiredArgsConstructor
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public class AiChatServiceImpl implements AiChatService {
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private final AiConfigResolverService aiConfigResolverService;
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private final AiChatMemoryService aiChatMemoryService;
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private final McpMountRuntimeFactory mcpMountRuntimeFactory;
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private final GenericApplicationContext applicationContext;
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private final ObservationRegistry observationRegistry;
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private final ObjectMapper objectMapper;
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@Qualifier("aiChatTaskExecutor")
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private final Executor aiChatTaskExecutor;
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@Override
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public AiChatRuntimeDto getRuntime(String promptCode, Long sessionId, Long userId, Long tenantId) {
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AiResolvedConfig config = aiConfigResolverService.resolve(promptCode, tenantId);
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AiChatMemoryDto memory = aiChatMemoryService.getMemory(userId, tenantId, config.getPromptCode(), sessionId);
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return AiChatRuntimeDto.builder()
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.requestId(null)
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.sessionId(memory.getSessionId())
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.promptCode(config.getPromptCode())
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.promptName(config.getPrompt().getName())
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.model(config.getAiParam().getModel())
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.configuredMcpCount(config.getMcpMounts().size())
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.mountedMcpCount(config.getMcpMounts().size())
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.mountedMcpNames(config.getMcpMounts().stream().map(item -> item.getName()).toList())
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.mountErrors(List.of())
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.memorySummary(memory.getMemorySummary())
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.memoryFacts(memory.getMemoryFacts())
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.recentMessageCount(memory.getRecentMessageCount())
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.persistedMessages(memory.getPersistedMessages())
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.build();
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}
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@Override
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public List<AiChatSessionDto> listSessions(String promptCode, String keyword, Long userId, Long tenantId) {
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AiResolvedConfig config = aiConfigResolverService.resolve(promptCode, tenantId);
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return aiChatMemoryService.listSessions(userId, tenantId, config.getPromptCode(), keyword);
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}
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@Override
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public void removeSession(Long sessionId, Long userId, Long tenantId) {
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aiChatMemoryService.removeSession(userId, tenantId, sessionId);
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}
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@Override
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public AiChatSessionDto renameSession(Long sessionId, AiChatSessionRenameRequest request, Long userId, Long tenantId) {
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return aiChatMemoryService.renameSession(userId, tenantId, sessionId, request);
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}
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@Override
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public AiChatSessionDto pinSession(Long sessionId, AiChatSessionPinRequest request, Long userId, Long tenantId) {
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return aiChatMemoryService.pinSession(userId, tenantId, sessionId, request);
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}
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@Override
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public void clearSessionMemory(Long sessionId, Long userId, Long tenantId) {
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aiChatMemoryService.clearSessionMemory(userId, tenantId, sessionId);
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}
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@Override
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public void retainLatestRound(Long sessionId, Long userId, Long tenantId) {
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aiChatMemoryService.retainLatestRound(userId, tenantId, sessionId);
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}
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@Override
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public SseEmitter stream(AiChatRequest request, Long userId, Long tenantId) {
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SseEmitter emitter = new SseEmitter(AiDefaults.SSE_TIMEOUT_MS);
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CompletableFuture.runAsync(() -> doStream(request, userId, tenantId, emitter), aiChatTaskExecutor);
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return emitter;
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}
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private void doStream(AiChatRequest request, Long userId, Long tenantId, SseEmitter emitter) {
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String requestId = request.getRequestId();
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long startedAt = System.currentTimeMillis();
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AtomicReference<Long> firstTokenAtRef = new AtomicReference<>();
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Long sessionId = request.getSessionId();
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String model = null;
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try {
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ensureIdentity(userId, tenantId);
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AiResolvedConfig config = resolveConfig(request, tenantId);
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final String resolvedModel = config.getAiParam().getModel();
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model = resolvedModel;
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AiChatSession session = resolveSession(request, userId, tenantId, config.getPromptCode());
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sessionId = session.getId();
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AiChatMemoryDto memory = loadMemory(userId, tenantId, config.getPromptCode(), session.getId());
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List<AiChatMessageDto> mergedMessages = mergeMessages(memory.getShortMemoryMessages(), request.getMessages());
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try (McpMountRuntimeFactory.McpMountRuntime runtime = createRuntime(config, userId)) {
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emitStrict(emitter, "start", AiChatRuntimeDto.builder()
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.requestId(requestId)
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.sessionId(session.getId())
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.promptCode(config.getPromptCode())
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.promptName(config.getPrompt().getName())
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.model(config.getAiParam().getModel())
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.configuredMcpCount(config.getMcpMounts().size())
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.mountedMcpCount(runtime.getMountedCount())
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.mountedMcpNames(runtime.getMountedNames())
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.mountErrors(runtime.getErrors())
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.memorySummary(memory.getMemorySummary())
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.memoryFacts(memory.getMemoryFacts())
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.recentMessageCount(memory.getRecentMessageCount())
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.persistedMessages(memory.getPersistedMessages())
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.build());
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emitSafely(emitter, "status", AiChatStatusDto.builder()
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.requestId(requestId)
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.sessionId(session.getId())
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.status("STARTED")
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.model(resolvedModel)
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.timestamp(Instant.now().toEpochMilli())
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.elapsedMs(0L)
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.build());
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log.info("AI chat started, requestId={}, userId={}, tenantId={}, sessionId={}, model={}",
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requestId, userId, tenantId, session.getId(), resolvedModel);
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Prompt prompt = new Prompt(
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buildPromptMessages(memory, mergedMessages, config.getPrompt(), request.getMetadata()),
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buildChatOptions(config.getAiParam(), runtime.getToolCallbacks(), userId, request.getMetadata())
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);
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OpenAiChatModel chatModel = createChatModel(config.getAiParam());
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if (Boolean.FALSE.equals(config.getAiParam().getStreamingEnabled())) {
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ChatResponse response = invokeChatCall(chatModel, prompt);
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String content = extractContent(response);
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aiChatMemoryService.saveRound(session, userId, tenantId, request.getMessages(), content);
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if (StringUtils.hasText(content)) {
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markFirstToken(firstTokenAtRef, emitter, requestId, session.getId(), resolvedModel, startedAt);
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emitStrict(emitter, "delta", buildMessagePayload("requestId", requestId, "content", content));
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}
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emitDone(emitter, requestId, response.getMetadata(), config.getAiParam().getModel(), session.getId(), startedAt, firstTokenAtRef.get());
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emitSafely(emitter, "status", buildTerminalStatus(requestId, session.getId(), "COMPLETED", resolvedModel, startedAt, firstTokenAtRef.get()));
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log.info("AI chat completed, requestId={}, sessionId={}, elapsedMs={}, firstTokenLatencyMs={}",
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requestId, session.getId(), System.currentTimeMillis() - startedAt, resolveFirstTokenLatency(startedAt, firstTokenAtRef.get()));
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emitter.complete();
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return;
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}
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Flux<ChatResponse> responseFlux = invokeChatStream(chatModel, prompt);
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AtomicReference<ChatResponseMetadata> lastMetadata = new AtomicReference<>();
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StringBuilder assistantContent = new StringBuilder();
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try {
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responseFlux.doOnNext(response -> {
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lastMetadata.set(response.getMetadata());
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String content = extractContent(response);
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if (StringUtils.hasText(content)) {
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markFirstToken(firstTokenAtRef, emitter, requestId, session.getId(), resolvedModel, startedAt);
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assistantContent.append(content);
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emitStrict(emitter, "delta", buildMessagePayload("requestId", requestId, "content", content));
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}
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})
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.blockLast();
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} catch (Exception e) {
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throw buildAiException("AI_MODEL_STREAM_ERROR", AiErrorCategory.MODEL, "MODEL_STREAM",
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e == null ? "AI 模型流式调用失败" : e.getMessage(), e);
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}
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aiChatMemoryService.saveRound(session, userId, tenantId, request.getMessages(), assistantContent.toString());
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emitDone(emitter, requestId, lastMetadata.get(), config.getAiParam().getModel(), session.getId(), startedAt, firstTokenAtRef.get());
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emitSafely(emitter, "status", buildTerminalStatus(requestId, session.getId(), "COMPLETED", resolvedModel, startedAt, firstTokenAtRef.get()));
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log.info("AI chat completed, requestId={}, sessionId={}, elapsedMs={}, firstTokenLatencyMs={}",
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requestId, session.getId(), System.currentTimeMillis() - startedAt, resolveFirstTokenLatency(startedAt, firstTokenAtRef.get()));
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emitter.complete();
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}
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} catch (AiChatException e) {
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handleStreamFailure(emitter, requestId, sessionId, model, startedAt, firstTokenAtRef.get(), e);
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} catch (Exception e) {
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handleStreamFailure(emitter, requestId, sessionId, model, startedAt, firstTokenAtRef.get(),
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buildAiException("AI_INTERNAL_ERROR", AiErrorCategory.INTERNAL, "INTERNAL",
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e == null ? "AI 对话失败" : e.getMessage(), e));
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} finally {
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log.debug("AI chat stream finished, requestId={}", requestId);
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}
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}
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private void ensureIdentity(Long userId, Long tenantId) {
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if (userId == null) {
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throw buildAiException("AI_AUTH_USER_MISSING", AiErrorCategory.AUTH, "AUTH_VALIDATE", "当前登录用户不存在", null);
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}
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if (tenantId == null) {
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throw buildAiException("AI_AUTH_TENANT_MISSING", AiErrorCategory.AUTH, "AUTH_VALIDATE", "当前租户不存在", null);
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}
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}
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private AiResolvedConfig resolveConfig(AiChatRequest request, Long tenantId) {
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try {
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return aiConfigResolverService.resolve(request.getPromptCode(), tenantId);
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} catch (Exception e) {
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throw buildAiException("AI_CONFIG_RESOLVE_ERROR", AiErrorCategory.CONFIG, "CONFIG_RESOLVE",
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e == null ? "AI 配置解析失败" : e.getMessage(), e);
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}
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}
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private AiChatSession resolveSession(AiChatRequest request, Long userId, Long tenantId, String promptCode) {
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try {
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return aiChatMemoryService.resolveSession(userId, tenantId, promptCode, request.getSessionId(), resolveTitleSeed(request.getMessages()));
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} catch (Exception e) {
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throw buildAiException("AI_SESSION_RESOLVE_ERROR", AiErrorCategory.REQUEST, "SESSION_RESOLVE",
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e == null ? "AI 会话解析失败" : e.getMessage(), e);
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}
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}
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private AiChatMemoryDto loadMemory(Long userId, Long tenantId, String promptCode, Long sessionId) {
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try {
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return aiChatMemoryService.getMemory(userId, tenantId, promptCode, sessionId);
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} catch (Exception e) {
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throw buildAiException("AI_MEMORY_LOAD_ERROR", AiErrorCategory.REQUEST, "MEMORY_LOAD",
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e == null ? "AI 会话记忆加载失败" : e.getMessage(), e);
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}
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}
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private McpMountRuntimeFactory.McpMountRuntime createRuntime(AiResolvedConfig config, Long userId) {
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try {
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return mcpMountRuntimeFactory.create(config.getMcpMounts(), userId);
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} catch (Exception e) {
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throw buildAiException("AI_MCP_MOUNT_ERROR", AiErrorCategory.MCP, "MCP_MOUNT",
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e == null ? "MCP 挂载失败" : e.getMessage(), e);
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}
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}
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private ChatResponse invokeChatCall(OpenAiChatModel chatModel, Prompt prompt) {
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try {
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return chatModel.call(prompt);
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} catch (Exception e) {
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throw buildAiException("AI_MODEL_CALL_ERROR", AiErrorCategory.MODEL, "MODEL_CALL",
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e == null ? "AI 模型调用失败" : e.getMessage(), e);
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}
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}
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private Flux<ChatResponse> invokeChatStream(OpenAiChatModel chatModel, Prompt prompt) {
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try {
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return chatModel.stream(prompt);
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} catch (Exception e) {
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throw buildAiException("AI_MODEL_STREAM_ERROR", AiErrorCategory.MODEL, "MODEL_STREAM_INIT",
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e == null ? "AI 模型流式调用失败" : e.getMessage(), e);
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}
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}
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private void markFirstToken(AtomicReference<Long> firstTokenAtRef, SseEmitter emitter, String requestId, Long sessionId, String model, long startedAt) {
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if (!firstTokenAtRef.compareAndSet(null, System.currentTimeMillis())) {
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return;
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}
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emitSafely(emitter, "status", AiChatStatusDto.builder()
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.requestId(requestId)
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.sessionId(sessionId)
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.status("FIRST_TOKEN")
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.model(model)
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.timestamp(Instant.now().toEpochMilli())
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.elapsedMs(System.currentTimeMillis() - startedAt)
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.firstTokenLatencyMs(resolveFirstTokenLatency(startedAt, firstTokenAtRef.get()))
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.build());
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}
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private AiChatStatusDto buildTerminalStatus(String requestId, Long sessionId, String status, String model, long startedAt, Long firstTokenAt) {
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return AiChatStatusDto.builder()
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.requestId(requestId)
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.sessionId(sessionId)
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.status(status)
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.model(model)
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.timestamp(Instant.now().toEpochMilli())
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.elapsedMs(System.currentTimeMillis() - startedAt)
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.firstTokenLatencyMs(resolveFirstTokenLatency(startedAt, firstTokenAt))
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.build();
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}
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private Long resolveFirstTokenLatency(long startedAt, Long firstTokenAt) {
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return firstTokenAt == null ? null : Math.max(0L, firstTokenAt - startedAt);
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}
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private void handleStreamFailure(SseEmitter emitter, String requestId, Long sessionId, String model, long startedAt, Long firstTokenAt, AiChatException exception) {
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if (isClientAbortException(exception)) {
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log.warn("AI chat aborted by client, requestId={}, sessionId={}, stage={}, message={}",
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requestId, sessionId, exception.getStage(), exception.getMessage());
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emitSafely(emitter, "status", buildTerminalStatus(requestId, sessionId, "ABORTED", model, startedAt, firstTokenAt));
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emitter.completeWithError(exception);
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return;
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}
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log.error("AI chat failed, requestId={}, sessionId={}, category={}, stage={}, message={}",
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requestId, sessionId, exception.getCategory(), exception.getStage(), exception.getMessage(), exception);
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emitSafely(emitter, "status", buildTerminalStatus(requestId, sessionId, "FAILED", model, startedAt, firstTokenAt));
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emitSafely(emitter, "error", AiChatErrorDto.builder()
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.requestId(requestId)
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.sessionId(sessionId)
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.code(exception.getCode())
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.category(exception.getCategory().name())
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.stage(exception.getStage())
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.message(exception.getMessage())
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.timestamp(Instant.now().toEpochMilli())
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.build());
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emitter.completeWithError(exception);
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}
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private OpenAiChatModel createChatModel(AiParam aiParam) {
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OpenAiApi openAiApi = buildOpenAiApi(aiParam);
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ToolCallingManager toolCallingManager = DefaultToolCallingManager.builder()
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.observationRegistry(observationRegistry)
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.toolCallbackResolver(new SpringBeanToolCallbackResolver(applicationContext, SchemaType.OPEN_API_SCHEMA))
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.toolExecutionExceptionProcessor(new DefaultToolExecutionExceptionProcessor(false))
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.build();
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return new OpenAiChatModel(
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openAiApi,
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OpenAiChatOptions.builder()
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.model(aiParam.getModel())
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.temperature(aiParam.getTemperature())
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.topP(aiParam.getTopP())
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.maxTokens(aiParam.getMaxTokens())
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.streamUsage(true)
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.build(),
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toolCallingManager,
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org.springframework.retry.support.RetryTemplate.builder().maxAttempts(1).build(),
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observationRegistry
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);
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}
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private OpenAiApi buildOpenAiApi(AiParam aiParam) {
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int timeoutMs = aiParam.getTimeoutMs() == null ? AiDefaults.DEFAULT_TIMEOUT_MS : aiParam.getTimeoutMs();
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SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
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requestFactory.setConnectTimeout(timeoutMs);
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requestFactory.setReadTimeout(timeoutMs);
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return OpenAiApi.builder()
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.baseUrl(aiParam.getBaseUrl())
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.apiKey(aiParam.getApiKey())
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.restClientBuilder(RestClient.builder().requestFactory(requestFactory))
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.webClientBuilder(WebClient.builder())
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.build();
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}
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private OpenAiChatOptions buildChatOptions(AiParam aiParam, ToolCallback[] toolCallbacks, Long userId, Map<String, Object> metadata) {
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if (userId == null) {
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throw buildAiException("AI_AUTH_USER_MISSING", AiErrorCategory.AUTH, "OPTIONS_BUILD", "当前登录用户不存在", null);
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}
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OpenAiChatOptions.Builder builder = OpenAiChatOptions.builder()
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.model(aiParam.getModel())
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.temperature(aiParam.getTemperature())
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.topP(aiParam.getTopP())
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.maxTokens(aiParam.getMaxTokens())
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.streamUsage(true)
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.user(String.valueOf(userId));
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if (!Cools.isEmpty(toolCallbacks)) {
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builder.toolCallbacks(Arrays.asList(toolCallbacks));
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}
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Map<String, String> metadataMap = new LinkedHashMap<>();
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if (metadata != null) {
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metadata.forEach((key, value) -> metadataMap.put(key, value == null ? "" : String.valueOf(value)));
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}
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if (!metadataMap.isEmpty()) {
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builder.metadata(metadataMap);
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}
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return builder.build();
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}
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private List<Message> buildPromptMessages(AiChatMemoryDto memory, List<AiChatMessageDto> sourceMessages, AiPrompt aiPrompt, Map<String, Object> metadata) {
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if (Cools.isEmpty(sourceMessages)) {
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throw new CoolException("对话消息不能为空");
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}
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List<Message> messages = new ArrayList<>();
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if (StringUtils.hasText(aiPrompt.getSystemPrompt())) {
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messages.add(new SystemMessage(aiPrompt.getSystemPrompt()));
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}
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if (memory != null && StringUtils.hasText(memory.getMemorySummary())) {
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messages.add(new SystemMessage("历史摘要:\n" + memory.getMemorySummary()));
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}
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if (memory != null && StringUtils.hasText(memory.getMemoryFacts())) {
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messages.add(new SystemMessage("关键事实:\n" + memory.getMemoryFacts()));
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}
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int lastUserIndex = -1;
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for (int i = 0; i < sourceMessages.size(); i++) {
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AiChatMessageDto item = sourceMessages.get(i);
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if (item != null && "user".equalsIgnoreCase(item.getRole())) {
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lastUserIndex = i;
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}
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}
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for (int i = 0; i < sourceMessages.size(); i++) {
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AiChatMessageDto item = sourceMessages.get(i);
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if (item == null || !StringUtils.hasText(item.getContent())) {
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continue;
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}
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String role = item.getRole() == null ? "user" : item.getRole().toLowerCase();
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if ("system".equals(role)) {
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continue;
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}
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String content = item.getContent();
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if ("user".equals(role) && i == lastUserIndex) {
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content = renderUserPrompt(aiPrompt.getUserPromptTemplate(), content, metadata);
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}
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if ("assistant".equals(role)) {
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messages.add(new AssistantMessage(content));
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} else {
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messages.add(new UserMessage(content));
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}
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}
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if (messages.stream().noneMatch(item -> item instanceof UserMessage)) {
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throw new CoolException("至少需要一条用户消息");
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}
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return messages;
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}
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private List<AiChatMessageDto> mergeMessages(List<AiChatMessageDto> persistedMessages, List<AiChatMessageDto> memoryMessages) {
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List<AiChatMessageDto> merged = new ArrayList<>();
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if (!Cools.isEmpty(persistedMessages)) {
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merged.addAll(persistedMessages);
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}
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if (!Cools.isEmpty(memoryMessages)) {
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merged.addAll(memoryMessages);
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}
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if (merged.isEmpty()) {
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throw new CoolException("对话消息不能为空");
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}
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return merged;
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}
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private String resolveTitleSeed(List<AiChatMessageDto> messages) {
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if (Cools.isEmpty(messages)) {
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throw new CoolException("对话消息不能为空");
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}
|
for (int i = messages.size() - 1; i >= 0; i--) {
|
AiChatMessageDto item = messages.get(i);
|
if (item != null && "user".equalsIgnoreCase(item.getRole()) && StringUtils.hasText(item.getContent())) {
|
return item.getContent();
|
}
|
}
|
throw new CoolException("至少需要一条用户消息");
|
}
|
|
private String renderUserPrompt(String userPromptTemplate, String content, Map<String, Object> metadata) {
|
if (!StringUtils.hasText(userPromptTemplate)) {
|
return content;
|
}
|
String rendered = userPromptTemplate
|
.replace("{{input}}", content)
|
.replace("{input}", content);
|
if (metadata != null) {
|
for (Map.Entry<String, Object> entry : metadata.entrySet()) {
|
String value = entry.getValue() == null ? "" : String.valueOf(entry.getValue());
|
rendered = rendered.replace("{{" + entry.getKey() + "}}", value);
|
rendered = rendered.replace("{" + entry.getKey() + "}", value);
|
}
|
}
|
if (Objects.equals(rendered, userPromptTemplate)) {
|
return userPromptTemplate + "\n\n" + content;
|
}
|
return rendered;
|
}
|
|
private String extractContent(ChatResponse response) {
|
if (response == null || response.getResult() == null || response.getResult().getOutput() == null) {
|
return null;
|
}
|
return response.getResult().getOutput().getText();
|
}
|
|
private void emitDone(SseEmitter emitter, String requestId, ChatResponseMetadata metadata, String fallbackModel, Long sessionId, long startedAt, Long firstTokenAt) {
|
Usage usage = metadata == null ? null : metadata.getUsage();
|
emitStrict(emitter, "done", AiChatDoneDto.builder()
|
.requestId(requestId)
|
.sessionId(sessionId)
|
.model(metadata != null && StringUtils.hasText(metadata.getModel()) ? metadata.getModel() : fallbackModel)
|
.elapsedMs(System.currentTimeMillis() - startedAt)
|
.firstTokenLatencyMs(resolveFirstTokenLatency(startedAt, firstTokenAt))
|
.promptTokens(usage == null ? null : usage.getPromptTokens())
|
.completionTokens(usage == null ? null : usage.getCompletionTokens())
|
.totalTokens(usage == null ? null : usage.getTotalTokens())
|
.build());
|
}
|
|
private Map<String, String> buildMessagePayload(String... keyValues) {
|
Map<String, String> payload = new LinkedHashMap<>();
|
if (keyValues == null || keyValues.length == 0) {
|
return payload;
|
}
|
if (keyValues.length % 2 != 0) {
|
throw new CoolException("消息载荷参数必须成对出现");
|
}
|
for (int i = 0; i < keyValues.length; i += 2) {
|
payload.put(keyValues[i], keyValues[i + 1] == null ? "" : keyValues[i + 1]);
|
}
|
return payload;
|
}
|
|
private void emitStrict(SseEmitter emitter, String eventName, Object payload) {
|
try {
|
String data = objectMapper.writeValueAsString(payload);
|
emitter.send(SseEmitter.event()
|
.name(eventName)
|
.data(data, MediaType.APPLICATION_JSON));
|
} catch (IOException e) {
|
throw buildAiException("AI_SSE_EMIT_ERROR", AiErrorCategory.STREAM, "SSE_EMIT", "SSE 输出失败: " + e.getMessage(), e);
|
}
|
}
|
|
private void emitSafely(SseEmitter emitter, String eventName, Object payload) {
|
try {
|
emitStrict(emitter, eventName, payload);
|
} catch (Exception e) {
|
log.warn("AI SSE event emit skipped, eventName={}, message={}", eventName, e.getMessage());
|
}
|
}
|
|
private AiChatException buildAiException(String code, AiErrorCategory category, String stage, String message, Throwable cause) {
|
return new AiChatException(code, category, stage, message, cause);
|
}
|
|
private boolean isClientAbortException(Throwable throwable) {
|
Throwable current = throwable;
|
while (current != null) {
|
String message = current.getMessage();
|
if (message != null) {
|
String normalized = message.toLowerCase();
|
if (normalized.contains("broken pipe")
|
|| normalized.contains("connection reset")
|
|| normalized.contains("forcibly closed")
|
|| normalized.contains("abort")) {
|
return true;
|
}
|
}
|
current = current.getCause();
|
}
|
return false;
|
}
|
}
|
