[pinpoint-apm#117] logger builder

lib/utils/logger2.js

@@ -0,0 +1,98 @@
+/**
+ * Pinpoint Node.js Agent
+ * Copyright 2020-present NAVER Corp.
+ * Apache License v2.0
+ */
+
+'use strict'
+
+const LogLevel = require('loglevel')
+
+class Logger {
+  constructor() {
+    this.LOG_LEVEL = LogLevel.levels
+    this.DEFAULT_LEVEL = this.LOG_LEVEL.SILENT
+    this.DEFAULT_NAME = 'default_logger'
+  }
+
+  static get DebugBuilder() {
+    return class Builder {
+      constructor(name) {
+        this.name = name
+        this.level = LogLevel.levels.DEBUG
+      }
+    }
+  }
+
+  static get InfoBuilder() {
+    return class Builder {
+      constructor(name) {
+        this.name = name
+        this.level = LogLevel.levels.INFO
+      }
+    }
+  }
+
+  static get WarnBuilder() {
+    return class Builder {
+      constructor(name) {
+        this.name = name
+        this.level = LogLevel.levels.WARN
+      }
+    }
+  }
+
+  static get ErrorBuilder() {
+    return class Builder {
+      constructor(name) {
+        this.name = name
+        this.level = LogLevel.levels.ERROR
+      }
+    }
+  }
+
+  init(logLevel, name) {
+    this.logger = logLevel.getLogger(name || this.DEFAULT_NAME)
+    this.logger.setLevel(logLevel || this.DEFAULT_LEVEL)
+  }
+
+  get log() {
+    if (!this.logger) {
+      this.init()
+      this.logger.info('init logger with default level')
+    }
+    return this.logger
+  }
+
+  debug() {
+    this.logger.debug.apply(null, arguments)
+  }
+
+  isDebug() {
+    if (!this.logger) {
+      return false
+    }
+    return this.logger.getLevel() == LogLevel.levels.DEBUG
+  }
+
+  info() {
+    this.logger.info.apply(null, arguments)
+  }
+
+  isInfo() {
+    if (!this.logger) {
+      return false
+    }
+    return this.logger.getLevel() == LogLevel.levels.INFO
+  }
+
+  warn() {
+    this.logger.warn.apply(null, arguments)
+  }
+
+  error() {
+    this.logger.error.apply(null, arguments)
+  }
+}
+
+module.exports = Logger

test/utils/logger.test.js

@@ -8,6 +8,8 @@
 
 const test = require('tape')
 const log = require('../../lib/utils/logger')
+const Logger = require('../../lib/utils/logger2')
+const LogLevel = require('loglevel')
 
 test('isDebug', (t) => {
     t.plan(3)
@@ -28,4 +30,24 @@ test('isInfo', (t) => {
     log.init("INFO")
     t.equal(log.isInfo(), true, 'info')
     t.equal(log.isDebug(), false, 'debug false')
+})
+
+test('Logger.Builder', (t) => {
+    let actual = new Logger.DebugBuilder('debug')
+    t.equal(actual.name, 'debug', 'debug name match')
+    t.equal(actual.level, LogLevel.levels.DEBUG, 'debug name match')
+
+    actual = new Logger.InfoBuilder('info')
+    t.equal(actual.name, 'info', 'info name match')
+    t.equal(actual.level, LogLevel.levels.INFO, 'info name match')
+
+    actual = new Logger.WarnBuilder('warn')
+    t.equal(actual.name, 'warn', 'warn name match')
+    t.equal(actual.level, LogLevel.levels.WARN, 'warn name match')
+
+    actual = new Logger.ErrorBuilder('error')
+    t.equal(actual.name, 'error', 'error name match')
+    t.equal(actual.level, LogLevel.levels.ERROR, 'error name match')
+
+    t.end()
 })