Add manual examples for Stackdriver and Zipkin and add license on files

Author: luanamartinssantos

examples/stackdriver/automatic.ts

@@ -1,3 +1,19 @@
+/** 
+ * Copyright 2018 Google Inc. All Rights Reserved. 
+ * 
+ * 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 
+ * 
+ *      http://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. 
+ */
+
 var fs = require('fs');
 var tracing = require('opencensus-nodejs').addStackdriver('project-id').start();
 

examples/stackdriver/custom_tracing.ts

@@ -0,0 +1,53 @@
+/** 
+ * Copyright 2018 Google Inc. All Rights Reserved. 
+ * 
+ * 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 
+ * 
+ *      http://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. 
+ */
+
+var opencensus = require('opencensus-nodejs');
+var http = require('http');
+var fs = require('fs');
+
+// Register trace exporters to export the collected data.
+var tracing = require('opencensus-nodejs').addStackdriver('project-id').start();
+var tracer = tracing.Tracer;
+
+var options = {
+    name: 'fs.writeFileSync'
+};
+
+// Create root span for GET request
+tracer.startRootSpan(options, (span) => {
+    http.get('http://httpbin.org/image/jpeg', function (response) {
+
+        var data = [];
+
+        response.on('data', (chunk) => {
+            data.push(chunk);
+        });
+
+        response.on('end', () => {
+            var filename = 'file';
+            // Create a child span for file writing operation
+            var childSpan = tracer.startSpan(filename);
+            var buffer = Buffer.concat(data);
+            fs.writeFileSync(filename + '.jpeg', buffer, 'utf-8');
+            
+            // Finish both root span and child span, since the operations 
+            // has ended.
+            childSpan.end();
+            span.end();
+        });
+        console.log('No more data in response.');
+    });
+});

examples/zipkin/automatic.ts

@@ -1,8 +1,23 @@
+/** 
+ * Copyright 2018 Google Inc. All Rights Reserved. 
+ * 
+ * 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 
+ * 
+ *      http://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. 
+ */
+
 var fs = require('fs');
-var tracing = require('opencensus-nodejs').addZipkin('http://localhost:9411/api/v2/spans', 'automatic_service');
+var tracing = require('opencensus-nodejs').addZipkin('http://localhost:9411/api/v2/spans', 'service_name');
 tracing.start();
 
-
 var http = require('http');
 http.createServer(function (req, res) {
     res.writeHead(200, { 'Content-Type': 'text/html' });

examples/zipkin/custom_tracing.ts

@@ -0,0 +1,54 @@
+/** 
+ * Copyright 2018 Google Inc. All Rights Reserved. 
+ * 
+ * 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 
+ * 
+ *      http://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. 
+ */
+
+var opencensus = require('opencensus-nodejs');
+var http = require('http');
+var fs = require('fs');
+
+// Register trace exporters to export the collected data.
+var tracing = opencensus.addZipkin('http://localhost:9411/api/v2/spans', 'service_name').start();
+var tracer = tracing.Tracer;
+
+var options = {
+    name: 'fs.writeFileSync'
+};
+
+// Create root span for GET request
+tracer.startRootSpan(options, (span) => {
+    http.get('http://httpbin.org/image/jpeg', function (response) {
+
+        var data = [];
+
+        response.on('data', (chunk) => {
+            data.push(chunk);
+        });
+
+        response.on('end', () => {
+            var filename = 'file';
+            // Create a child span for file writing operation
+            var childSpan = tracer.startSpan(filename);
+            var buffer = Buffer.concat(data);
+            fs.writeFileSync(filename + '.jpeg', buffer, 'utf-8');
+            
+            // Finish both root span and child span, since the operations 
+            // has ended.
+            childSpan.end();
+            span.end();
+        });
+        console.log('No more data in response.');
+    });
+});
+