Update and add imports to stats example in readme.

Changes in this commit:
- Remove use of deprecated AggregationWindow.
- Make methods public to show that they could be called by code that isn't part of the example.
- Rename the class for consistency with the tracing example.
- Run google-java-format.

1 files changed, 36 insertions, 19 deletions

diff --git a/README.md b/README.md
index 393b38ee..e0b19706 100644
--- a/README.md
+++ b/README.md
@@ -116,7 +116,23 @@ For the complete example, see
 [here](https://github.com/census-instrumentation/opencensus-java/blob/master/examples/src/main/java/io/opencensus/examples/helloworld/QuickStart.java).
 
 ```java
-public final class QuickStart {
+import io.opencensus.common.Scope;
+import io.opencensus.stats.Aggregation;
+import io.opencensus.stats.BucketBoundaries;
+import io.opencensus.stats.Measure.MeasureLong;
+import io.opencensus.stats.Stats;
+import io.opencensus.stats.StatsRecorder;
+import io.opencensus.stats.View;
+import io.opencensus.stats.ViewData;
+import io.opencensus.stats.ViewManager;
+import io.opencensus.tags.TagKey;
+import io.opencensus.tags.TagValue;
+import io.opencensus.tags.Tagger;
+import io.opencensus.tags.Tags;
+import java.util.Arrays;
+import java.util.Collections;
+
+public final class MyClassWithStats {
   private static final Tagger tagger = Tags.getTagger();
   private static final ViewManager viewManager = Stats.getViewManager();
   private static final StatsRecorder statsRecorder = Stats.getStatsRecorder();
@@ -125,32 +141,33 @@ public final class QuickStart {
   private static final TagKey FRONTEND_KEY = TagKey.create("myorg_keys_frontend");
 
   // videoSize will measure the size of processed videos.
-  private static final MeasureLong VIDEO_SIZE = MeasureLong.create(
-      "my.org/measure/video_size", "size of processed videos", "By");
+  private static final MeasureLong VIDEO_SIZE =
+      MeasureLong.create("my.org/measure/video_size", "size of processed videos", "By");
 
   // Create view to see the processed video size distribution broken down by frontend.
   // The view has bucket boundaries (0, 256, 65536) that will group measure values into
   // histogram buckets.
   private static final View.Name VIDEO_SIZE_VIEW_NAME = View.Name.create("my.org/views/video_size");
-  private static final View VIDEO_SIZE_VIEW = View.create(
-      VIDEO_SIZE_VIEW_NAME,
-      "processed video size over time",
-      VIDEO_SIZE,
-      Aggregation.Distribution.create(BucketBoundaries.create(Arrays.asList(0.0, 256.0, 65536.0))),
-      Collections.singletonList(FRONTEND_KEY),
-      Cumulative.create());
-
-  private static void initialize() {
+  private static final View VIDEO_SIZE_VIEW =
+      View.create(
+          VIDEO_SIZE_VIEW_NAME,
+          "processed video size over time",
+          VIDEO_SIZE,
+          Aggregation.Distribution.create(
+              BucketBoundaries.create(Arrays.asList(0.0, 256.0, 65536.0))),
+          Collections.singletonList(FRONTEND_KEY));
+
+  public static void initialize() {
     // ...
     viewManager.registerView(VIDEO_SIZE_VIEW);
   }
 
-  private static void processVideo() {
+  public static void processVideo() {
     try (Scope scopedTags =
-           tagger
-             .currentBuilder()
-             .put(FRONTEND_KEY, TagValue.create("mobile-ios9.3.5"))
-             .buildScoped()) {
+        tagger
+            .currentBuilder()
+            .put(FRONTEND_KEY, TagValue.create("mobile-ios9.3.5"))
+            .buildScoped()) {
       // Processing video.
       // ...
 
@@ -159,10 +176,10 @@ public final class QuickStart {
     }
   }
 
-  private static void printStats() {
+  public static void printStats() {
     ViewData viewData = viewManager.getView(VIDEO_SIZE_VIEW_NAME);
     System.out.println(
-      String.format("Recorded stats for %s:\n %s", VIDEO_SIZE_VIEW_NAME.asString(), viewData));
+        String.format("Recorded stats for %s:\n %s", VIDEO_SIZE_VIEW_NAME.asString(), viewData));
   }
 }
 ```