add hw2

node_modules/pino/examples/transport.js

@@ -0,0 +1,68 @@
+'use strict'
+
+const pino = require('..')
+const { tmpdir } = require('os')
+const { join } = require('path')
+
+const file = join(tmpdir(), `pino-${process.pid}-example`)
+
+const transport = pino.transport({
+  targets: [{
+    level: 'warn',
+    target: 'pino/file',
+    options: {
+      destination: file
+    }
+    /*
+  }, {
+    level: 'info',
+    target: 'pino-elasticsearch',
+    options: {
+      node: 'http://localhost:9200'
+    }
+    */
+  }, {
+    level: 'info',
+    target: 'pino-pretty'
+  }]
+})
+
+const logger = pino(transport)
+
+logger.info({
+  file
+}, 'logging destination')
+
+logger.info('hello world')
+logger.error('this is at error level')
+logger.info('the answer is %d', 42)
+logger.info({ obj: 42 }, 'hello world')
+logger.info({ obj: 42, b: 2 }, 'hello world')
+logger.info({ nested: { obj: 42 } }, 'nested')
+logger.warn('WARNING!')
+setImmediate(() => {
+  logger.info('after setImmediate')
+})
+logger.error(new Error('an error'))
+
+const child = logger.child({ a: 'property' })
+child.info('hello child!')
+
+const childsChild = child.child({ another: 'property' })
+childsChild.info('hello baby..')
+
+logger.debug('this should be mute')
+
+logger.level = 'trace'
+
+logger.debug('this is a debug statement')
+
+logger.child({ another: 'property' }).debug('this is a debug statement via child')
+logger.trace('this is a trace statement')
+
+logger.debug('this is a "debug" statement with "')
+
+logger.info(new Error('kaboom'))
+logger.info(null)
+
+logger.info(new Error('kaboom'), 'with', 'a', 'message')