日志服务
编辑日志服务编辑
允许插件提供状态和诊断信息。
日志服务仅在服务器端可用。
import type { PluginInitializerContext, CoreSetup, Plugin, Logger } from '@kbn/core/server';
export class MyPlugin implements Plugin {
private readonly logger: Logger;
constructor(initializerContext: PluginInitializerContext) {
this.logger = initializerContext.logger.get();
}
public setup(core: CoreSetup) {
try {
this.logger.debug('doing something...');
// …
} catch (e) {
this.logger.error('failed doing something...');
}
}
}
用法编辑
用法非常简单，只需获取特定上下文的记录器，并使用它以不同的日志级别记录消息。
const logger = kibana.logger.get('server');
logger.trace('Message with `trace` log level.');
logger.debug('Message with `debug` log level.');
logger.info('Message with `info` log level.');
logger.warn('Message with `warn` log level.');
logger.error('Message with `error` log level.');
logger.fatal('Message with `fatal` log level.');
const loggerWithNestedContext = kibana.logger.get('server', 'http');
loggerWithNestedContext.trace('Message with `trace` log level.');
loggerWithNestedContext.debug('Message with `debug` log level.');
假设使用了名为 server 的记录器，并使用了 console 追加器和 trace 级别，控制台输出将如下所示
[2017-07-25T11:54:41.639-07:00][TRACE][server] Message with `trace` log level. [2017-07-25T11:54:41.639-07:00][DEBUG][server] Message with `debug` log level. [2017-07-25T11:54:41.639-07:00][INFO ][server] Message with `info` log level. [2017-07-25T11:54:41.639-07:00][WARN ][server] Message with `warn` log level. [2017-07-25T11:54:41.639-07:00][ERROR][server] Message with `error` log level. [2017-07-25T11:54:41.639-07:00][FATAL][server] Message with `fatal` log level. [2017-07-25T11:54:41.639-07:00][TRACE][server.http] Message with `trace` log level. [2017-07-25T11:54:41.639-07:00][DEBUG][server.http] Message with `debug` log level.
如果将 server 记录器的级别设置为 warn，则日志将更简洁
[2017-07-25T11:54:41.639-07:00][WARN ][server] Message with `warn` log level. [2017-07-25T11:54:41.639-07:00][ERROR][server] Message with `error` log level. [2017-07-25T11:54:41.639-07:00][FATAL][server] Message with `fatal` log level.