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| 1 | +package io.github.easy4j.opencode.api; |
| 2 | + |
| 3 | +import com.fasterxml.jackson.databind.ObjectMapper; |
| 4 | +import io.github.easy4j.opencode.HttpCallCancellation; |
| 5 | +import io.github.easy4j.opencode.OpenCodeHttpClientConfig; |
| 6 | +import io.github.easy4j.opencode.api.mapper.ChatMessageMapper; |
| 7 | +import io.github.easy4j.opencode.api.model.ChatRequest; |
| 8 | +import io.github.easy4j.opencode.api.model.ChatResponse; |
| 9 | +import io.github.easy4j.opencode.api.model.ChatStreamingResponse; |
| 10 | +import io.github.easy4j.opencode.api.model.Event; |
| 11 | +import io.github.easy4j.opencode.api.model.PromptRequest; |
| 12 | +import io.github.easy4j.opencode.api.model.PromptResult; |
| 13 | +import okhttp3.OkHttpClient; |
| 14 | + |
| 15 | +import java.util.Map; |
| 16 | +import java.util.Objects; |
| 17 | +import java.util.concurrent.BlockingQueue; |
| 18 | +import java.util.concurrent.ExecutorService; |
| 19 | +import java.util.concurrent.LinkedBlockingQueue; |
| 20 | +import java.util.concurrent.RejectedExecutionException; |
| 21 | +import java.util.concurrent.ThreadPoolExecutor; |
| 22 | +import java.util.concurrent.TimeUnit; |
| 23 | +import java.util.concurrent.atomic.AtomicInteger; |
| 24 | +import java.util.function.Consumer; |
| 25 | + |
| 26 | +/** |
| 27 | + * OpenCode 聊天场景客户端，统一提供完整响应与流式响应。 |
| 28 | + * |
| 29 | + * <p>普通 Prompt/Chat 调用继承自 {@link OpenCodeHttpClient}；事件订阅是流式聊天的 |
| 30 | + * 内部实现细节，业务调用方通过本类即可完成两种响应模式。</p> |
| 31 | + */ |
| 32 | +public class OpenCodeChatClient extends OpenCodeHttpClient { |
| 33 | + |
| 34 | + private final OpenCodeHttpClientConfig config; |
| 35 | + private final OpenCodeSseClient eventClient; |
| 36 | + private final ExecutorService streamExecutor; |
| 37 | + |
| 38 | + public OpenCodeChatClient(OpenCodeHttpClientConfig config) { |
| 39 | + this(config, new ObjectMapper(), null); |
| 40 | + } |
| 41 | + |
| 42 | + public OpenCodeChatClient(OpenCodeHttpClientConfig config, ObjectMapper objectMapper, |
| 43 | + OkHttpClient httpClient) { |
| 44 | + super(config, objectMapper, httpClient); |
| 45 | + this.config = Objects.requireNonNull(config, "config"); |
| 46 | + this.eventClient = new OpenCodeSseClient(config, objectMapper, getOkHttpClient()); |
| 47 | + this.streamExecutor = createStreamExecutor(config); |
| 48 | + } |
| 49 | + |
| 50 | + private static ExecutorService createStreamExecutor(OpenCodeHttpClientConfig config) { |
| 51 | + int corePoolSize = Math.max(1, config.getStreamCorePoolSize()); |
| 52 | + int maxPoolSize = Math.max(corePoolSize, config.getStreamMaxPoolSize()); |
| 53 | + AtomicInteger threadIndex = new AtomicInteger(); |
| 54 | + return new ThreadPoolExecutor(corePoolSize, maxPoolSize, |
| 55 | + Math.max(1L, config.getStreamKeepAliveMillis()), TimeUnit.MILLISECONDS, |
| 56 | + new LinkedBlockingQueue<>(Math.max(1, config.getStreamQueueCapacity())), runnable -> { |
| 57 | + Thread thread = new Thread(runnable, |
| 58 | + "opencode-stream-consumer-" + threadIndex.incrementAndGet()); |
| 59 | + thread.setDaemon(true); |
| 60 | + return thread; |
| 61 | + }, new ThreadPoolExecutor.AbortPolicy()); |
| 62 | + } |
| 63 | + |
| 64 | + public ChatResponse chatCompletion(String sessionId, ChatRequest request) { |
| 65 | + PromptResult result = prompt(sessionId, ChatMessageMapper.toPromptRequest(request)); |
| 66 | + return ChatMessageMapper.toChatResponse(result); |
| 67 | + } |
| 68 | + |
| 69 | + public ChatResponse chatCompletionWithSession(ChatRequest request, String sessionKey) { |
| 70 | + PromptResult result = chatCompletionWithSession(ChatMessageMapper.toPromptRequest(request), sessionKey); |
| 71 | + return ChatMessageMapper.toChatResponse(result); |
| 72 | + } |
| 73 | + |
| 74 | + public ChatResponse chatCompletionWithSession(ChatRequest request, String sessionKey, |
| 75 | + HttpCallCancellation cancellation) { |
| 76 | + PromptResult result = chatCompletionWithSession( |
| 77 | + ChatMessageMapper.toPromptRequest(request), sessionKey, cancellation); |
| 78 | + return ChatMessageMapper.toChatResponse(result); |
| 79 | + } |
| 80 | + |
| 81 | + public ChatStreamingResponse chatCompletionStream(ChatRequest request, String sessionKey) { |
| 82 | + return chatCompletionStream(request, sessionKey, null, null); |
| 83 | + } |
| 84 | + |
| 85 | + public ChatStreamingResponse chatCompletionStream(ChatRequest request, String sessionKey, |
| 86 | + OpenCodeRequestContext context) { |
| 87 | + return chatCompletionStream(request, sessionKey, context, null); |
| 88 | + } |
| 89 | + |
| 90 | + /** 在事件订阅启动前绑定增量回调，避免丢失首批分片。 */ |
| 91 | + public ChatStreamingResponse chatCompletionStream(ChatRequest request, String sessionKey, |
| 92 | + OpenCodeRequestContext context, |
| 93 | + Consumer<String> deltaConsumer) { |
| 94 | + String sessionId = ensureSession(sessionKey, context); |
| 95 | + PromptRequest promptRequest = ChatMessageMapper.toPromptRequest(request); |
| 96 | + ChatStreamingResponse stream = new ChatStreamingResponse().onDelta(deltaConsumer); |
| 97 | + OpenCodeSseClient.QueueSubscription subscription = eventClient.subscribeQueueSubscription(context); |
| 98 | + BlockingQueue<Event> queue = subscription.getQueue(); |
| 99 | + |
| 100 | + try { |
| 101 | + streamExecutor.submit(() -> consumeEvents(sessionId, queue, subscription, stream)); |
| 102 | + } catch (RejectedExecutionException error) { |
| 103 | + subscription.close(); |
| 104 | + stream.fail(new IllegalStateException("OpenCode stream executor is full", error)); |
| 105 | + return stream; |
| 106 | + } |
| 107 | + |
| 108 | + try { |
| 109 | + if (!promptAsync(sessionId, promptRequest, context)) { |
| 110 | + subscription.close(); |
| 111 | + stream.fail(new IllegalStateException("OpenCode async prompt was rejected")); |
| 112 | + } |
| 113 | + } catch (RuntimeException error) { |
| 114 | + subscription.close(); |
| 115 | + stream.fail(error); |
| 116 | + } |
| 117 | + return stream; |
| 118 | + } |
| 119 | + |
| 120 | + private void consumeEvents(String sessionId, BlockingQueue<Event> queue, |
| 121 | + OpenCodeSseClient.QueueSubscription subscription, |
| 122 | + ChatStreamingResponse stream) { |
| 123 | + try { |
| 124 | + long timeoutMillis = Math.max(1L, config.getReadTimeoutMillis()); |
| 125 | + long deadline = System.currentTimeMillis() + timeoutMillis; |
| 126 | + while (!stream.isDone() && System.currentTimeMillis() < deadline) { |
| 127 | + Event event = queue.poll(3, TimeUnit.SECONDS); |
| 128 | + if (Objects.isNull(event) || !matchesSession(event, sessionId)) { |
| 129 | + continue; |
| 130 | + } |
| 131 | + String type = event.getType(); |
| 132 | + if (Objects.isNull(type)) { |
| 133 | + continue; |
| 134 | + } |
| 135 | + if (type.contains("text.delta") || type.contains("message.part.updated")) { |
| 136 | + stream.acceptDelta(extractDeltaText(event)); |
| 137 | + } |
| 138 | + if (type.contains("session.status") || type.contains("session.idle")) { |
| 139 | + String status = Objects.toString(event.getProperties().get("status"), null); |
| 140 | + if (Objects.equals("idle", status) || type.contains("idle")) { |
| 141 | + stream.finish(); |
| 142 | + return; |
| 143 | + } |
| 144 | + } |
| 145 | + if (type.contains("session.error")) { |
| 146 | + stream.fail(new IllegalStateException( |
| 147 | + Objects.toString(event.getProperties().get("error"), "unknown error"))); |
| 148 | + return; |
| 149 | + } |
| 150 | + } |
| 151 | + if (!stream.isDone()) { |
| 152 | + stream.fail(new IllegalStateException("Stream timed out for session: " + sessionId)); |
| 153 | + } |
| 154 | + } catch (InterruptedException error) { |
| 155 | + Thread.currentThread().interrupt(); |
| 156 | + stream.fail(error); |
| 157 | + } catch (RuntimeException error) { |
| 158 | + stream.fail(error); |
| 159 | + } finally { |
| 160 | + subscription.close(); |
| 161 | + } |
| 162 | + } |
| 163 | + |
| 164 | + private boolean matchesSession(Event event, String sessionId) { |
| 165 | + return Objects.nonNull(event.getProperties()) |
| 166 | + && Objects.equals(sessionId, Objects.toString(event.getProperties().get("sessionID"), null)); |
| 167 | + } |
| 168 | + |
| 169 | + private String extractDeltaText(Event event) { |
| 170 | + if (Objects.isNull(event.getProperties())) { |
| 171 | + return null; |
| 172 | + } |
| 173 | + Object part = event.getProperties().get("part"); |
| 174 | + if (part instanceof Map) { |
| 175 | + Object text = ((Map<?, ?>) part).get("text"); |
| 176 | + if (Objects.nonNull(text)) { |
| 177 | + return text.toString(); |
| 178 | + } |
| 179 | + } |
| 180 | + return Objects.toString(event.getProperties().get("delta"), null); |
| 181 | + } |
| 182 | + |
| 183 | + /** 原始事件客户端，仅供非聊天事件等高级场景使用。 */ |
| 184 | + public OpenCodeSseClient events() { |
| 185 | + return eventClient; |
| 186 | + } |
| 187 | + |
| 188 | + @Override |
| 189 | + public void close() { |
| 190 | + streamExecutor.shutdownNow(); |
| 191 | + eventClient.close(); |
| 192 | + super.close(); |
| 193 | + } |
| 194 | +} |
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