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這篇文章主要講解了“Java怎么在CompletableFuture中實現日志記錄”,文中的講解內容簡單清晰,易于學習與理解,下面請大家跟著小編的思路慢慢深入,一起來研究和學習“Java怎么在CompletableFuture中實現日志記錄”吧!
1.首先利用aop為所有請求入口添加requestId。
@Aspect @Component public class LoggingAspect { /** * AOP注解的Controller類方法必須為 public 或 protect ,千萬不能用private!!!!!!!!否則會@Autowired注入的service會報空指針異常。 * 私有方法和字段不屬于Spring上下文中的bean屬性。 */ @Around("@annotation(org.springframework.web.bind.annotation.GetMapping) || " + "@annotation(org.springframework.web.bind.annotation.PostMapping) || " + "@annotation(org.springframework.web.bind.annotation.PutMapping) || " + "@annotation(org.springframework.web.bind.annotation.DeleteMapping)") public Object logAround(ProceedingJoinPoint joinPoint) throws Throwable { // 在logback-spring.xml里對應%X{requestId} MDC.put("requestId", UUID.randomUUID().toString().substring(0, 13)); // Add request ID to MDC try { return joinPoint.proceed(); // Execute method } finally { MDC.remove("requestId"); // Remove request ID from MDC } } }
2.定義一下 logback-spring.xml ,引入 requestId 來進行鏈路記錄,關鍵代碼是 %X{requestId}
<?xml version="1.0" encoding="UTF-8"?> <configuration> <!-- 控制臺日志格式 --> <property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %X{requestId} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/> <!-- 控制臺日志格式 依賴的渲染類 --> <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" /> <conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" /> <conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" /> <!-- 輸出到控制臺 --> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <filter class="ch.qos.logback.classic.filter.ThresholdFilter"> <level>debug</level> </filter> <!-- 配置日志輸出格式 --> <pattern>${CONSOLE_LOG_PATTERN}</pattern> <!-- 使用的字符集 --> <charset>UTF-8</charset> </encoder> </appender> <!-- 定義輸出的路徑,獲取application.yml的source的值 --> <springProperty scope="context" name="LOG_FILE_PATH" source="logging.file-location" default="/var/log/myapp"/> <!-- 2.輸出到文件 --> <!-- 2.1 level為 DEBUG 日志,時間滾動輸出 --> <appender name="DEBUG_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${LOG_FILE_PATH}/debug.log</file> <!-- 文件路徑 --> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %X{requestId} [%thread] %-5level %logger{50} - %msg%n</pattern><!-- 日志文檔輸出格式 --> <charset>UTF-8</charset> </encoder> <!-- 日志記錄器的滾動策略,按日期,按大小記錄 --> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <!-- 每天新開一個文件 --> <fileNamePattern>${LOG_FILE_PATH}/debug-%d{yyyy-MM-dd}.%i.log</fileNamePattern> <!-- 每天100m新開一個文件 --> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>100MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <!-- 日志文檔保留天數 --> <maxHistory>15</maxHistory> <!-- 用來指定日志文件的上限大小,例如設置為1GB的話,那么到了這個值,就會刪除舊的日志。 --> <totalSizeCap>1GB</totalSizeCap> </rollingPolicy> <!-- 此日志文檔只記錄debug級別的 --> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>debug</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> </appender> <!-- 2.2 level為 INFO 日志,時間滾動輸出 --> <appender name="INFO_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${LOG_FILE_PATH}/info.log</file> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %X{requestId} [%thread] %-5level %logger{50} - %msg%n</pattern> <charset>UTF-8</charset> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${LOG_FILE_PATH}/info-%d{yyyy-MM-dd}.%i.log</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>100MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <maxHistory>15</maxHistory> </rollingPolicy> <!-- 此日志文檔只記錄info級別的 --> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>info</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> </appender> <!-- 2.3 level為 WARN 日志,時間滾動輸出 --> <appender name="WARN_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${LOG_FILE_PATH}/warn.log</file> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %X{requestId} [%thread] %-5level %logger{50} - %msg%n</pattern> <charset>UTF-8</charset> <!-- 此處設置字符集 --> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${LOG_FILE_PATH}/warn-%d{yyyy-MM-dd}.%i.log</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>100MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <maxHistory>15</maxHistory> </rollingPolicy> <!-- 此日志文檔只記錄warn級別的 --> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>warn</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> </appender> <!-- 2.4 level為 ERROR 日志,時間滾動輸出 --> <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${LOG_FILE_PATH}/error.log</file> <!--日志文檔輸出格式--> <encoder> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %X{requestId} [%thread] %-5level %logger{50} - %msg%n</pattern> <charset>UTF-8</charset> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${LOG_FILE_PATH}/error-%d{yyyy-MM-dd}.%i.log</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>100MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <maxHistory>15</maxHistory> </rollingPolicy> <!-- 此日志文檔只記錄ERROR級別的 --> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>ERROR</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> </appender> <!-- 使用異步,一個AsyncAppender只能添加一個appender-ref --> <appender name="ASYNC_DEBUG_FILE" class="ch.qos.logback.classic.AsyncAppender"> <appender-ref ref="DEBUG_FILE"/> </appender> <appender name="ASYNC_INFO_FILE" class="ch.qos.logback.classic.AsyncAppender"> <appender-ref ref="INFO_FILE"/> </appender> <appender name="ASYNC_WARN_FILE" class="ch.qos.logback.classic.AsyncAppender"> <appender-ref ref="WARN_FILE"/> </appender> <appender name="ASYNC_ERROR_FILE" class="ch.qos.logback.classic.AsyncAppender"> <appender-ref ref="ERROR_FILE"/> </appender> <!-- 開啟上面的appender --> <root level="info"> <appender-ref ref="CONSOLE" /> <appender-ref ref="ASYNC_DEBUG_FILE" /> <appender-ref ref="ASYNC_INFO_FILE" /> <appender-ref ref="ASYNC_WARN_FILE" /> <appender-ref ref="ASYNC_ERROR_FILE" /> </root> </configuration>
2.定義一個`復雜`業務流程,來看看日志的實力
private final ExecutorService executorService = Executors.newFixedThreadPool(4); @GetMapping("saveUser") public String saveUser() { log.info("進入了saveUser"); // 異步 CompletableFuture.runAsync(()-> b(), executorService); log.info("退出了saveUser"); return "Ok"; } private void b() { log.info("進入了b"); }
日志如下,可以看到異步線程的requestId丟失了,21dbaad3-3158 這個就是requestId,這種情況下我們需要自定義線程類來保存MDC的上下文
2023-04-19 11:51:59.309 21dbaad3-3158 INFO 23044 --- [p-nio-80-exec-1] c.h.m.api.CompletableFutureApi : 進入了saveUser
2023-04-19 11:51:59.312 21dbaad3-3158 INFO 23044 --- [p-nio-80-exec-1] c.h.m.api.CompletableFutureApi : 退出了saveUser
2023-04-19 11:51:59.312 INFO 23044 --- [pool-1-thread-1] c.h.m.api.CompletableFutureApi : 進入了b
3.定義線程實現類,并且在構造函數中存儲MDC的上下文
public static class MdcTaskWrapper implements Runnable { private final Runnable task; private final Map<String, String> contextMap; public MdcTaskWrapper(Runnable task) { this.task = task; this.contextMap = MDC.getCopyOfContextMap(); } @Override public void run() { if (contextMap != null) { MDC.setContextMap(contextMap); } try { task.run(); } finally { MDC.clear(); } } }
4.接下來再改寫一下runAsync的使用方式,我們用MdcTaskWrapper來進行線程操作,這個線程類是包含mdc上下文的
@GetMapping("saveUser") public String saveUser() { log.info("進入了saveUser"); // 異步 CompletableFuture.runAsync(this::b, command -> executorService.execute(new MdcTaskWrapper(command))); log.info("退出了saveUser"); return "Ok"; } private void b() { log.info("進入了b"); }
可以看到,requestId:4ab037ab-92cb,異步線程能夠拿到MDC的上下文,并且成功記錄鏈路日志
2023-04-19 11:58:27.581 4ab037ab-92cb INFO 6816 --- [p-nio-80-exec-5] c.h.m.api.CompletableFutureApi : 進入了saveUser
2023-04-19 11:58:27.582 4ab037ab-92cb INFO 6816 --- [p-nio-80-exec-5] c.h.m.api.CompletableFutureApi : 退出了saveUser
2023-04-19 11:58:27.582 4ab037ab-92cb INFO 6816 --- [pool-1-thread-1] c.h.m.api.CompletableFutureApi
感謝各位的閱讀,以上就是“Java怎么在CompletableFuture中實現日志記錄”的內容了,經過本文的學習后,相信大家對Java怎么在CompletableFuture中實現日志記錄這一問題有了更深刻的體會,具體使用情況還需要大家實踐驗證。這里是億速云,小編將為大家推送更多相關知識點的文章,歡迎關注!
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