Fix buffer and exporters local bugs

Author: eduardoemery

packages/opencensus-core/src/trace/model/tracer.ts

@@ -29,15 +29,15 @@ export type Func<T> = (...args: any[]) => T;
 
 export class Tracer implements OnEndSpanEventListener {
 
-    readonly PLUGINS = ['http', 'https', 'mongodb-core', 'express'];
+    readonly PLUGINS = ['http', 'https', 'mongodb-core'];
 
     //public buffer: Buffer;
     private _active: boolean;
     private contextManager: cls.Namespace;
     private config: TracerConfig;
 
     //TODO: simple solution - to be rewied in future
-    private eventListeners: OnEndSpanEventListener[] = [];   
+    private eventListeners: OnEndSpanEventListener[] = [];
     //TODO: temp solution 
     private endedTraces: RootSpan[] = [];
 
@@ -76,12 +76,17 @@ export class Tracer implements OnEndSpanEventListener {
         return this.contextManager.runAndReturn((root) => {
             let newRoot = new RootSpan(this, options);
             this.setCurrentRootSpan(newRoot);
-            if(options.sampler == null){
+            if (!options) {
+                options = <TraceOptions>{}
+            }
+            if (!options.sampler) {
+                // options.sampler = new Sampler(newRoot.traceId);
+                // options.sampler.probability(0.6);
                 options.sampler = new Sampler(newRoot.traceId);
-                options.sampler.probability(0.6);
+                options.sampler.always();
             }
             newRoot.sampler = options.sampler;
-            if(newRoot.sampler.continue(newRoot.traceId)){
+            if (newRoot.sampler.continue(newRoot.traceId)) {
                 newRoot.start();
                 return fn(newRoot);
             }
@@ -90,12 +95,12 @@ export class Tracer implements OnEndSpanEventListener {
     }
 
 
-    public onEndSpan(root:RootSpan): void {
+    public onEndSpan(root: RootSpan): void {
         if (!root) {
             return debug('cannot end trace - no active trace found')
         }
-        if(this.currentRootSpan != root) {
-             debug('currentRootSpan != root on notifyEnd. Need more investigation.') 
+        if (this.currentRootSpan != root) {
+            debug('currentRootSpan != root on notifyEnd. Need more investigation.')
         }
         this.notifyEndSpan(root);
         //this.clearCurrentTrace();
@@ -107,8 +112,8 @@ export class Tracer implements OnEndSpanEventListener {
 
     private notifyEndSpan(root: RootSpan) {
         if (this.active) {
-            debug ('starting to notify listeners the end of rootspans')
-            if(this.eventListeners&&this.eventListeners.length >0) {
+            debug('starting to notify listeners the end of rootspans')
+            if (this.eventListeners && this.eventListeners.length > 0) {
                 this.eventListeners.forEach((listener) => listener.onEndSpan(root))
             }
         } else {

packages/opencensus-core/src/trace/sampler/sampler.ts

@@ -32,7 +32,7 @@ export class Sampler{
       * @param spanId 
       * @param isRemote 
       */
-     constructor(traceId?:string, spanId?:string, isRemote?:boolean){
+    constructor(traceId?:string, spanId?:string, isRemote?:boolean){
          debug('Samplre constructor')
          if(traceId){ 
              this.traceId   = traceId;
@@ -68,16 +68,16 @@ export class Sampler{
      }
 
      public continue (traceId:string):boolean{
-        debug('Samplre continue')
+        //debug('Samplre continue')
         let lower_bytes = traceId.substring(16)
         let lower_long: number
-        debug('SAMPLER CONTINUE lower_bytes :',lower_bytes)
+        //debug('SAMPLER CONTINUE lower_bytes :',lower_bytes)
 
         lower_long = parseInt(lower_bytes, 16);
 
-        debug('SAMPLER CONTINUE lower_long :',lower_long)
-        debug('SAMPLER CONTINUE this.idUpperBound :',this.idUpperBound)
-        debug('SAMPLER CONTINUE diff :',lower_long - this.idUpperBound)
+        //debug('SAMPLER CONTINUE lower_long :',lower_long)
+        //debug('SAMPLER CONTINUE this.idUpperBound :',this.idUpperBound)
+        //debug('SAMPLER CONTINUE diff :',lower_long - this.idUpperBound)
 
         if(lower_long <= this.idUpperBound){
             debug('trace sampler TRUE')