yanghao605 commented on code in PR #4875: URL: https://github.com/apache/servicecomb-java-chassis/pull/4875#discussion_r2238825630
########## common/common-rest/src/main/java/org/apache/servicecomb/common/rest/codec/produce/ProduceEventStreamProcessor.java: ########## @@ -0,0 +1,132 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.servicecomb.common.rest.codec.produce; + +import java.io.InputStream; +import java.io.OutputStream; +import java.nio.charset.StandardCharsets; +import java.util.Arrays; + +import org.apache.commons.lang3.StringUtils; +import org.apache.servicecomb.common.rest.codec.RestObjectMapperFactory; +import org.apache.servicecomb.swagger.sse.SseEventResponseEntity; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.fasterxml.jackson.databind.JavaType; + +import jakarta.ws.rs.core.MediaType; + +public class ProduceEventStreamProcessor implements ProduceProcessor { + private static final Logger LOGGER = LoggerFactory.getLogger(ProduceEventStreamProcessor.class); + + private int writeIndex = 0; + + @Override + public String getName() { + return MediaType.SERVER_SENT_EVENTS; + } + + @Override + public int getOrder() { + return 0; + } + + @Override + public void doEncodeResponse(OutputStream output, Object result) throws Exception { + StringBuilder bufferBuilder = new StringBuilder(); + if (result instanceof SseEventResponseEntity<?> responseEntity) { + appendEventId(bufferBuilder, responseEntity.getEventId()); + appendEvent(bufferBuilder, responseEntity.getEvent()); + appendRetry(bufferBuilder, responseEntity.getRetry()); + appendData(bufferBuilder, responseEntity.getData()); + } else { + appendEventId(bufferBuilder, writeIndex++); + appendData(bufferBuilder, result); + } + bufferBuilder.append("\n"); + output.write(bufferBuilder.toString().getBytes(StandardCharsets.UTF_8)); + } + + @Override + public Object doDecodeResponse(InputStream input, JavaType type) throws Exception { + String buffer = new String(input.readAllBytes(), StandardCharsets.UTF_8); + LOGGER.info("=========doDecodeResponse buffer===================>" + buffer + "stack: {}", Arrays.toString( + new Exception().getStackTrace())); + SseEventResponseEntity<?> responseEntity = new SseEventResponseEntity<>(); + boolean isResponseEntity = false; + for (String line : buffer.split("\n")) { Review Comment: 这里的基于\n区分事件，如果服务端在吐数据时，内部也有\n如何处理？是sse格式上要求\n是用来区分事件的标识符吗？ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
