The article directories

      • background
      • implementation
        • Online weblog
        • Dynamically changing the log level

background

Viewing logs and changing log levels are common operations during project development.

The general operation mode is as follows:

Inconvenient and cumbersome to operate

Look what I achieved:

  • Online weblog, can enter any location of the file, support to determine the path and relative path
  • Dynamic log levels are set without service resetting

implementation

Online weblog

The core code

  @RequestMapping(value = "/file", produces = "text/plain; charset=UTF-8")
    public Resource logFile(@RequestParam(required = false) String filePath) {
        if (StrUtil.isNotBlank(filePath)) {
            filePathConfig = filePath;
        }
        Resource logFileResource = new FileSystemResource(new File(filePathConfig));
        if (logFileResource == null| |! logFileResource.isReadable()) {return null;
        }
        return logFileResource;
    }
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Dynamically changing the log level

  @RequestMapping(value = "/level") // Dynamically set the log level
    public String configureLogLevel(String name, LogLevel configuredLevel) {
        if (StrUtil.isBlank(name)) {
            return "Please enter log name";
        }
        log.debug("name:{},level:{}", name, configuredLevel);
        log.info("name:{},level:{}", name, configuredLevel);
        log.warn("name:{},level:{}", name, configuredLevel);
        log.error("name:{},level:{}", name, configuredLevel);
        LoggerGroup group = this.loggerGroups.get(name);
        if(group ! =null && group.hasMembers()) {
            group.configureLogLevel(configuredLevel, this.loggingSystem::setLogLevel);
            return "ok";
        }
        this.loggingSystem.setLogLevel(name, configuredLevel);
        return "ok";
    }
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This section describes the functions of the log-related interfaces in the Spring-boot-starter -actuator.

  • LogFileWebEndpointTo implement log browsing on the server side
  • LoggersEndpointTo achieve log level query and dynamic setting

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