Use the correct maven path for examples which is src/main/java/...

1 files changed, 85 insertions, 0 deletions

diff --git a/examples/src/main/java/com/google/instrumentation/stats/StatsRunner.java b/examples/src/main/java/com/google/instrumentation/stats/StatsRunner.java
new file mode 100644
index 00000000..2eb28133
--- /dev/null
+++ b/examples/src/main/java/com/google/instrumentation/stats/StatsRunner.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2016, Google Inc.
+ * 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.
+ */
+
+package com.google.instrumentation.stats;
+
+import com.google.instrumentation.stats.MeasurementDescriptor.BasicUnit;
+import com.google.instrumentation.stats.MeasurementDescriptor.MeasurementUnit;
+import io.grpc.Context;
+import java.util.Arrays;
+
+/**
+ * Simple program that uses Stats contexts.
+ */
+public class StatsRunner {
+  private static final TagKey K1 = TagKey.create("k1");
+  private static final TagKey K2 = TagKey.create("k2");
+  private static final TagKey K3 = TagKey.create("k3");
+  private static final TagKey K4 = TagKey.create("k4");
+
+  private static final TagValue V1 = TagValue.create("v1");
+  private static final TagValue V2 = TagValue.create("v2");
+  private static final TagValue V3 = TagValue.create("v3");
+  private static final TagValue V4 = TagValue.create("v4");
+
+  private static final MeasurementUnit simpleMeasurementUnit =
+      MeasurementUnit.create(1, Arrays.asList(BasicUnit.SCALAR));
+  private static final MeasurementDescriptor M1 =
+      MeasurementDescriptor.create("m1", "1st test metric", simpleMeasurementUnit);
+  private static final MeasurementDescriptor M2 =
+      MeasurementDescriptor.create("m2", "2nd test metric", simpleMeasurementUnit);
+
+  public static void main(String[] args) {
+    System.out.println("Hello Stats World");
+    System.out.println("Default Tags: " + DEFAULT);
+    System.out.println("Current Tags: " + getCurrentStatsContext());
+    Context context1 = withCurrent(DEFAULT.with(K1, V1, K2, V2));
+    Context original = context1.attach();
+    try {
+        System.out.println("  Current Tags: " + getCurrentStatsContext());
+        System.out.println("  Current == Default + tags1: "
+            + getCurrentStatsContext().equals(getStatsContext(context1)));
+        Context context2 = withCurrent(getCurrentStatsContext().with(K3, V3, K4, V4));
+        context2.attach();
+        try {
+          System.out.println("    Current Tags: " + getCurrentStatsContext());
+          System.out.println("    Current == Default + tags1 + tags2: "
+              + getCurrentStatsContext().equals(getStatsContext(context2)));
+          getCurrentStatsContext().record(MeasurementMap.of(M1, 0.2, M2, 0.4));
+        } finally {
+          context2.detach(context1);
+        }
+    } finally {
+      context1.detach(original);
+    }
+    System.out.println("Current == Default: "
+        + getCurrentStatsContext().equals(DEFAULT));
+  }
+
+  private static final StatsContext DEFAULT = Stats.getStatsContextFactory().getDefault();
+
+  private static final Context.Key<StatsContext> STATS_CONTEXT_KEY =
+      Context.keyWithDefault("StatsContextKey", DEFAULT);
+
+  private static final StatsContext getCurrentStatsContext() {
+    return getStatsContext(Context.current());
+  }
+
+  private static final StatsContext getStatsContext(Context context) {
+    return STATS_CONTEXT_KEY.get(context);
+  }
+
+  private static final Context withCurrent(StatsContext context) {
+    return Context.current().withValue(STATS_CONTEXT_KEY, context);
+  }
+}