update example

opencensus-shim/README.md

@@ -23,10 +23,7 @@ To allow the shim to work for metrics, add the shim as a dependency.
 Applications also need to attach OpenCensus metrics to their metric readers on registration.
 
 ```java
-PeriodicMetricReader reader = ...
-SdkMeterProvider.builder()
-    .registerMetricReader(OpenCensusMetrics.attachTo(reader))
-    .buildAndRegisterGlobal();
+SdkMeterProvider.builder().registerMetricReader(PeriodicMetricReader.builder(exporter).addMetricProducer(OpenCensusMetricProducer.create()).build())
 ```
 
 For example, if a logging exporter were configured, the following would be

sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/internal/export/MetricProducer.java

@@ -14,8 +14,8 @@
 
 /**
  * {@code MetricProducer} is the interface that is used to make metric data available to the {@link
- * MetricReader}s. Implementations should be stateful, in that each call to {@link
- * #produce()} will return any metric generated since the last call was made.
+ * MetricReader}s. Implementations should be stateful, in that each call to {@link #produce()} will
+ * return any metric generated since the last call was made.
  *
  * <p>Implementations must be thread-safe.
  *
@@ -26,7 +26,7 @@
 public interface MetricProducer extends CollectionRegistration {
 
   /** Cast the registration to a {@link MetricProducer}. */
-static MetricProducer asMetricProducer(CollectionRegistration registration) {
+  static MetricProducer asMetricProducer(CollectionRegistration registration) {
     if (!(registration instanceof MetricProducer)) {
       throw new IllegalArgumentException(
           "unrecognized CollectionRegistration, custom MetricReader implementations are not currently supported");