获取消息详情

src/main/java/cn/meteor/beyondclouds/modules/message/api/MessageApi.java

 package cn.meteor.beyondclouds.modules.message.api;
 
 
+import cn.meteor.beyondclouds.core.api.Response;
+import cn.meteor.beyondclouds.modules.message.entity.Message;
+import cn.meteor.beyondclouds.modules.message.exception.MessageServiceException;
+import cn.meteor.beyondclouds.modules.message.service.IMessageService;
+import cn.meteor.beyondclouds.modules.topic.exception.TopicServiceException;
 import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
-
-import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RestController;
 
 /**
  * <p>
@@ -14,10 +22,30 @@ import org.springframework.stereotype.Controller;
  * @author 段启岩
  * @since 2020-02-12
  */
-@Controller
+@RestController
 @Api(tags = "消息API")
 @RequestMapping("/api")
 public class MessageApi {
 
+    private IMessageService messageService;
+
+    @Autowired
+    public void setMessageService(IMessageService messageService) {
+        this.messageService = messageService;
+    }
+
+    @ApiOperation("消息详情")
+    @GetMapping("/message/{messageId}")
+    public Response getTopic(@PathVariable("messageId") String messageId) {
+        try {
+            Message message = messageService.getMessage(messageId);
+            return Response.success(message);
+        } catch (MessageServiceException e) {
+            e.printStackTrace();
+            return Response.error(e);
+        }
+
+    }
+
 }
 

src/main/java/cn/meteor/beyondclouds/modules/message/enums/MessageErrorCode.java

+package cn.meteor.beyondclouds.modules.message.enums;
+
+
+import cn.meteor.beyondclouds.core.IErrorCode;
+
+/**
+ * 消息相关错误码
+ * @author 胡明森
+ */
+public enum MessageErrorCode implements IErrorCode {
+    /**
+     * 错误码
+     */
+    MESSAGE_NOT_EXISTS(3002, "消息不存在");
+
+    MessageErrorCode(long code, String msg) {
+        this.code = code;
+        this.msg = msg;
+    }
+
+    private long code;
+    private String msg;
+    @Override
+    public long code () {
+        return code;
+    }
+
+    @Override
+    public String msg() {
+        return msg;
+    }
+}

src/main/java/cn/meteor/beyondclouds/modules/message/exception/MessageServiceException.java

+package cn.meteor.beyondclouds.modules.message.exception;
+
+import cn.meteor.beyondclouds.core.IErrorCode;
+import cn.meteor.beyondclouds.core.exception.ServiceException;
+import lombok.Data;
+
+/**
+ * 话题业务异常
+ * @author 胡明森
+ * @since 2020/1/28
+ */
+@Data
+public class MessageServiceException extends ServiceException {
+
+        public MessageServiceException(long errorCode, String errorMsg) {
+            super(errorCode, errorMsg);
+        }
+
+        public MessageServiceException(IErrorCode errorCode) {
+            this(errorCode.code(), errorCode.msg());
+        }
+
+}

src/main/java/cn/meteor/beyondclouds/modules/message/service/IMessageService.java

 package cn.meteor.beyondclouds.modules.message.service;
 
 import cn.meteor.beyondclouds.modules.message.entity.Message;
+import cn.meteor.beyondclouds.modules.message.exception.MessageServiceException;
 import com.baomidou.mybatisplus.extension.service.IService;
 
 /**
@@ -13,4 +14,10 @@ import com.baomidou.mybatisplus.extension.service.IService;
  */
 public interface IMessageService extends IService<Message> {
 
+    /**
+     * 获取消息详情
+     * @param messageId
+     * @return
+     */
+    Message getMessage(String messageId) throws MessageServiceException;
 }

src/main/java/cn/meteor/beyondclouds/modules/message/service/impl/MessageServiceImpl.java

 package cn.meteor.beyondclouds.modules.message.service.impl;
 
 import cn.meteor.beyondclouds.modules.message.entity.Message;
+import cn.meteor.beyondclouds.modules.message.enums.MessageErrorCode;
+import cn.meteor.beyondclouds.modules.message.exception.MessageServiceException;
 import cn.meteor.beyondclouds.modules.message.mapper.MessageMapper;
 import cn.meteor.beyondclouds.modules.message.service.IMessageService;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
@@ -17,4 +19,16 @@ import org.springframework.stereotype.Service;
 @Service
 public class MessageServiceImpl extends ServiceImpl<MessageMapper, Message> implements IMessageService {
 
+    @Override
+    public Message getMessage(String messageId) throws MessageServiceException{
+
+        //1. 检测是否存在该消息
+        Message message =getById(messageId);
+        if (message == null) {
+            throw new MessageServiceException(MessageErrorCode.MESSAGE_NOT_EXISTS);
+        }
+
+        //2. 返回消息详情
+        return message;
+    }
 }