chore(examples): lint examples/memcached using shared top-level eslint config (#2904)

Refs: #2891

Author: trentm

examples/memcached/.eslintrc.js

@@ -0,0 +1,26 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+const baseConfig = require('../../eslint.config');
+
+module.exports = {
+  ...baseConfig,
+  env: {
+    node: true,
+  },
+};

examples/memcached/.npmrc

@@ -0,0 +1 @@
+package-lock=false

examples/memcached/index.js

@@ -1,3 +1,19 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 'use strict';
 
 require('./tracer')('example-resource');
@@ -9,12 +25,16 @@ const VALUE = `RAND:${Math.random().toFixed(4)}`;
 const LT = 10;
 const client = new Memcached();
 
-client.set(KEY, VALUE, LT, (err) => {
+client.set(KEY, VALUE, LT, err => {
   assert.strictEqual(err, undefined);
   client.get(KEY, (err, result) => {
     assert.strictEqual(err, undefined);
     assert.strictEqual(result, VALUE);
-    console.log('Sleeping 5 seconds before shutdown to ensure all records are flushed.');
-    setTimeout(() => { console.log('Completed.'); }, 5000);
+    console.log(
+      'Sleeping 5 seconds before shutdown to ensure all records are flushed.'
+    );
+    setTimeout(() => {
+      console.log('Completed.');
+    }, 5000);
   });
 });

examples/memcached/package.json

@@ -5,6 +5,8 @@
   "description": "Example of Memcached client with OpenTelemetry",
   "main": "index.js",
   "scripts": {
+    "lint": "eslint . --ext=ts,js,mjs",
+    "lint:fix": "eslint . --ext=ts,js,mjs --fix",
     "docker:start": "docker run --rm -d --name otel-memcached -p 11211:11211 memcached:1.6.9-alpine",
     "docker:stop": "docker rm -f otel-memcached",
     "start": "node index.js"

examples/memcached/tracer.js

@@ -1,3 +1,19 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 'use strict';
 
 const opentelemetry = require('@opentelemetry/api');
@@ -7,27 +23,28 @@ diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.VERBOSE);
 
 const { registerInstrumentations } = require('@opentelemetry/instrumentation');
 const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
-const { SimpleSpanProcessor, ConsoleSpanExporter } = require('@opentelemetry/sdk-trace-base');
+const {
+  SimpleSpanProcessor,
+  ConsoleSpanExporter,
+} = require('@opentelemetry/sdk-trace-base');
 const { Resource } = require('@opentelemetry/resources');
 const { ATTR_SERVICE_NAME } = require('@opentelemetry/semantic-conventions');
 
-const { MemcachedInstrumentation } = require('@opentelemetry/instrumentation-memcached');
+const {
+  MemcachedInstrumentation,
+} = require('@opentelemetry/instrumentation-memcached');
 
-module.exports = (serviceName) => {
+module.exports = serviceName => {
   const exporter = new ConsoleSpanExporter();
   const provider = new NodeTracerProvider({
     resource: new Resource({
       [ATTR_SERVICE_NAME]: serviceName,
     }),
-    spanProcessors: [
-      new SimpleSpanProcessor(exporter),
-    ],
+    spanProcessors: [new SimpleSpanProcessor(exporter)],
   });
   registerInstrumentations({
     tracerProvider: provider,
-    instrumentations: [
-      new MemcachedInstrumentation(),
-    ],
+    instrumentations: [new MemcachedInstrumentation()],
   });
 
   // Initialize the OpenTelemetry APIs to use the NodeTracerProvider bindings