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-rw-r--r--impl_core/src/main/java/io/opencensus/implcore/internal/Utils.java41
-rw-r--r--impl_core/src/main/java/io/opencensus/implcore/metrics/LongGaugeImpl.java172
-rw-r--r--impl_core/src/main/java/io/opencensus/implcore/metrics/Meter.java34
-rw-r--r--impl_core/src/test/java/io/opencensus/implcore/internal/UtilsTest.java47
-rw-r--r--impl_core/src/test/java/io/opencensus/implcore/metrics/LongGaugeImplTest.java292
5 files changed, 586 insertions, 0 deletions
diff --git a/impl_core/src/main/java/io/opencensus/implcore/internal/Utils.java b/impl_core/src/main/java/io/opencensus/implcore/internal/Utils.java
new file mode 100644
index 00000000..05a039b9
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/internal/Utils.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2018, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.internal;
+
+import java.util.List;
+
+/** General internal utility methods. */
+public final class Utils {
+
+ private Utils() {}
+
+ /**
+ * Throws a {@link NullPointerException} if any of the list elements is null.
+ *
+ * @param list the argument list to check for null.
+ * @param errorMessage the message to use for the exception. Will be converted to a string using
+ * {@link String#valueOf(Object)}.
+ */
+ public static <T> void checkListElementNotNull(
+ List<T> list, @javax.annotation.Nullable Object errorMessage) {
+ for (T element : list) {
+ if (element == null) {
+ throw new NullPointerException(String.valueOf(errorMessage));
+ }
+ }
+ }
+}
diff --git a/impl_core/src/main/java/io/opencensus/implcore/metrics/LongGaugeImpl.java b/impl_core/src/main/java/io/opencensus/implcore/metrics/LongGaugeImpl.java
new file mode 100644
index 00000000..4ad4e354
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/metrics/LongGaugeImpl.java
@@ -0,0 +1,172 @@
+/*
+ * Copyright 2018, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.metrics;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.annotations.VisibleForTesting;
+import io.opencensus.common.Clock;
+import io.opencensus.implcore.internal.Utils;
+import io.opencensus.metrics.LabelKey;
+import io.opencensus.metrics.LabelValue;
+import io.opencensus.metrics.LongGauge;
+import io.opencensus.metrics.export.Metric;
+import io.opencensus.metrics.export.MetricDescriptor;
+import io.opencensus.metrics.export.MetricDescriptor.Type;
+import io.opencensus.metrics.export.Point;
+import io.opencensus.metrics.export.TimeSeries;
+import io.opencensus.metrics.export.Value;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+import javax.annotation.Nullable;
+
+/** Implementation of {@link LongGauge}. */
+public final class LongGaugeImpl extends LongGauge implements Meter {
+ @VisibleForTesting static final LabelValue UNSET_VALUE = LabelValue.create(null);
+
+ private final MetricDescriptor metricDescriptor;
+ private volatile Map<List<LabelValue>, PointImpl> registeredPoints = Collections.emptyMap();
+ private final int labelKeysSize;
+ private final List<LabelValue> defaultLabelValues;
+
+ LongGaugeImpl(String name, String description, String unit, List<LabelKey> labelKeys) {
+ labelKeysSize = labelKeys.size();
+ this.metricDescriptor =
+ MetricDescriptor.create(name, description, unit, Type.GAUGE_INT64, labelKeys);
+
+ // initialize defaultLabelValues
+ defaultLabelValues = new ArrayList<LabelValue>(labelKeysSize);
+ for (int i = 0; i < labelKeysSize; i++) {
+ defaultLabelValues.add(UNSET_VALUE);
+ }
+ }
+
+ @Override
+ public LongPoint getOrCreateTimeSeries(List<LabelValue> labelValues) {
+ // lock free point retrieval, if it is present
+ PointImpl existingPoint = registeredPoints.get(labelValues);
+ if (existingPoint != null) {
+ return existingPoint;
+ }
+
+ List<LabelValue> labelValuesCopy =
+ Collections.unmodifiableList(
+ new ArrayList<LabelValue>(
+ checkNotNull(labelValues, "labelValues should not be null.")));
+ return registerTimeSeries(labelValuesCopy);
+ }
+
+ @Override
+ public LongPoint getDefaultTimeSeries() {
+ // lock free default point retrieval, if it is present
+ PointImpl existingPoint = registeredPoints.get(defaultLabelValues);
+ if (existingPoint != null) {
+ return existingPoint;
+ }
+ return registerTimeSeries(defaultLabelValues);
+ }
+
+ @Override
+ public synchronized void removeTimeSeries(List<LabelValue> labelValues) {
+ checkNotNull(labelValues, "labelValues should not be null.");
+
+ Map<List<LabelValue>, PointImpl> registeredPointsCopy =
+ new HashMap<List<LabelValue>, PointImpl>(registeredPoints);
+ if (registeredPointsCopy.remove(labelValues) == null) {
+ // The element not present, no need to update the current map of points.
+ return;
+ }
+ registeredPoints = Collections.unmodifiableMap(registeredPointsCopy);
+ }
+
+ @Override
+ public synchronized void clear() {
+ registeredPoints = Collections.emptyMap();
+ }
+
+ private synchronized LongPoint registerTimeSeries(List<LabelValue> labelValues) {
+ PointImpl existingPoint = registeredPoints.get(labelValues);
+ if (existingPoint != null) {
+ // Return a Point that are already registered. This can happen if a multiple threads
+ // concurrently try to register the same {@code TimeSeries}.
+ return existingPoint;
+ }
+
+ checkArgument(labelKeysSize == labelValues.size(), "Incorrect number of labels.");
+ Utils.checkListElementNotNull(labelValues, "labelValues element should not be null.");
+
+ PointImpl newPoint = new PointImpl(labelValues);
+ // Updating the map of points happens under a lock to avoid multiple add operations
+ // to happen in the same time.
+ Map<List<LabelValue>, PointImpl> registeredPointsCopy =
+ new HashMap<List<LabelValue>, PointImpl>(registeredPoints);
+ registeredPointsCopy.put(labelValues, newPoint);
+ registeredPoints = Collections.unmodifiableMap(registeredPointsCopy);
+
+ return newPoint;
+ }
+
+ @Nullable
+ @Override
+ public Metric getMetric(Clock clock) {
+ Map<List<LabelValue>, PointImpl> currentRegisteredPoints = registeredPoints;
+
+ int pointCount = currentRegisteredPoints.size();
+ if (pointCount > 0) {
+ List<TimeSeries> timeSeriesList = new ArrayList<TimeSeries>(pointCount);
+ for (Map.Entry<List<LabelValue>, PointImpl> entry : currentRegisteredPoints.entrySet()) {
+ timeSeriesList.add(entry.getValue().getTimeSeries(clock));
+ }
+
+ // TODO(mayurkale): optimize this for 1 timeseries (issue #1491).
+ return Metric.create(metricDescriptor, timeSeriesList);
+ }
+ return null;
+ }
+
+ /** Implementation of {@link LongGauge.LongPoint}. */
+ public static final class PointImpl extends LongPoint {
+
+ // TODO(mayurkale): Consider to use LongAdder here, once we upgrade to Java8.
+ private final AtomicLong value = new AtomicLong(0);
+ private final List<LabelValue> labelValues;
+
+ PointImpl(List<LabelValue> labelValues) {
+ this.labelValues = labelValues;
+ }
+
+ @Override
+ public void add(long amt) {
+ value.addAndGet(amt);
+ }
+
+ @Override
+ public void set(long val) {
+ value.set(val);
+ }
+
+ private TimeSeries getTimeSeries(Clock clock) {
+ return TimeSeries.createWithOnePoint(
+ labelValues, Point.create(Value.longValue(value.get()), clock.now()), null);
+ }
+ }
+}
diff --git a/impl_core/src/main/java/io/opencensus/implcore/metrics/Meter.java b/impl_core/src/main/java/io/opencensus/implcore/metrics/Meter.java
new file mode 100644
index 00000000..f5a8dc8f
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/metrics/Meter.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.metrics;
+
+import io.opencensus.common.Clock;
+import io.opencensus.metrics.export.Metric;
+import javax.annotation.Nullable;
+
+interface Meter {
+ /**
+ * Provides a {@link io.opencensus.metrics.export.Metric} with one or more {@link
+ * io.opencensus.metrics.export.TimeSeries}.
+ *
+ * @param clock the clock used to get the time.
+ * @throws NullPointerException if {@code TimeSeries} is not present in {@code Metric}.
+ * @return a {@code Metric}.
+ */
+ @Nullable
+ Metric getMetric(Clock clock);
+}
diff --git a/impl_core/src/test/java/io/opencensus/implcore/internal/UtilsTest.java b/impl_core/src/test/java/io/opencensus/implcore/internal/UtilsTest.java
new file mode 100644
index 00000000..2e0bde21
--- /dev/null
+++ b/impl_core/src/test/java/io/opencensus/implcore/internal/UtilsTest.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.internal;
+
+import java.util.Arrays;
+import java.util.List;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link Utils}. */
+@RunWith(JUnit4.class)
+public class UtilsTest {
+ @Rule public ExpectedException thrown = ExpectedException.none();
+
+ @Test
+ public void checkListElementNull() {
+ List<Double> list = Arrays.asList(0.0, 1.0, 2.0, null);
+ thrown.expect(NullPointerException.class);
+ thrown.expectMessage("null");
+ Utils.checkListElementNotNull(list, null);
+ }
+
+ @Test
+ public void checkListElementNull_WithMessage() {
+ List<Double> list = Arrays.asList(0.0, 1.0, 2.0, null);
+ thrown.expect(NullPointerException.class);
+ thrown.expectMessage("list should not be null.");
+ Utils.checkListElementNotNull(list, "list should not be null.");
+ }
+}
diff --git a/impl_core/src/test/java/io/opencensus/implcore/metrics/LongGaugeImplTest.java b/impl_core/src/test/java/io/opencensus/implcore/metrics/LongGaugeImplTest.java
new file mode 100644
index 00000000..0a1c2826
--- /dev/null
+++ b/impl_core/src/test/java/io/opencensus/implcore/metrics/LongGaugeImplTest.java
@@ -0,0 +1,292 @@
+/*
+ * Copyright 2018, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.metrics;
+
+import static com.google.common.truth.Truth.assertThat;
+import static io.opencensus.implcore.metrics.LongGaugeImpl.UNSET_VALUE;
+
+import com.google.common.testing.EqualsTester;
+import io.opencensus.common.Timestamp;
+import io.opencensus.metrics.LabelKey;
+import io.opencensus.metrics.LabelValue;
+import io.opencensus.metrics.LongGauge.LongPoint;
+import io.opencensus.metrics.export.Metric;
+import io.opencensus.metrics.export.MetricDescriptor;
+import io.opencensus.metrics.export.MetricDescriptor.Type;
+import io.opencensus.metrics.export.Point;
+import io.opencensus.metrics.export.TimeSeries;
+import io.opencensus.metrics.export.Value;
+import io.opencensus.testing.common.TestClock;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link LongGaugeImpl}. */
+@RunWith(JUnit4.class)
+public class LongGaugeImplTest {
+ @Rule public ExpectedException thrown = ExpectedException.none();
+
+ private static final String METRIC_NAME = "name";
+ private static final String METRIC_DESCRIPTION = "description";
+ private static final String METRIC_UNIT = "1";
+ private static final List<LabelKey> LABEL_KEY =
+ Collections.singletonList(LabelKey.create("key", "key description"));
+ private static final List<LabelValue> LABEL_VALUES =
+ Collections.singletonList(LabelValue.create("value"));
+ private static final List<LabelValue> LABEL_VALUES1 =
+ Collections.singletonList(LabelValue.create("value1"));
+ private static final List<LabelValue> DEFAULT_LABEL_VALUES =
+ Collections.singletonList(UNSET_VALUE);
+
+ private static final Timestamp TEST_TIME = Timestamp.create(1234, 123);
+ private final TestClock testClock = TestClock.create(TEST_TIME);
+ private static final MetricDescriptor METRIC_DESCRIPTOR =
+ MetricDescriptor.create(
+ METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, Type.GAUGE_INT64, LABEL_KEY);
+ private final LongGaugeImpl longGaugeMetric =
+ new LongGaugeImpl(METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, LABEL_KEY);
+
+ @Test
+ public void getOrCreateTimeSeries_WithNullLabelValues() {
+ thrown.expect(NullPointerException.class);
+ thrown.expectMessage("labelValues should not be null.");
+ longGaugeMetric.getOrCreateTimeSeries(null);
+ }
+
+ @Test
+ public void getOrCreateTimeSeries_WithNullElement() {
+ List<LabelKey> labelKeys =
+ Arrays.asList(LabelKey.create("key1", "desc"), LabelKey.create("key2", "desc"));
+ List<LabelValue> labelValues = Arrays.asList(LabelValue.create("value1"), null);
+
+ LongGaugeImpl longGauge =
+ new LongGaugeImpl(METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, labelKeys);
+ thrown.expect(NullPointerException.class);
+ thrown.expectMessage("labelValues element should not be null.");
+ longGauge.getOrCreateTimeSeries(labelValues);
+ }
+
+ @Test
+ public void getOrCreateTimeSeries_WithInvalidLabelSize() {
+ List<LabelValue> labelValues =
+ Arrays.asList(LabelValue.create("value1"), LabelValue.create("value2"));
+
+ thrown.expect(IllegalArgumentException.class);
+ thrown.expectMessage("Incorrect number of labels.");
+ longGaugeMetric.getOrCreateTimeSeries(labelValues);
+ }
+
+ @Test
+ public void getOrCreateTimeSeries() {
+ LongPoint point = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ point.add(100);
+ LongPoint point1 = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ point1.set(500);
+
+ Metric metric = longGaugeMetric.getMetric(testClock);
+ assertThat(metric).isNotEqualTo(null);
+ assertThat(metric)
+ .isEqualTo(
+ Metric.create(
+ METRIC_DESCRIPTOR,
+ Collections.singletonList(
+ TimeSeries.createWithOnePoint(
+ LABEL_VALUES, Point.create(Value.longValue(500), TEST_TIME), null))));
+ new EqualsTester().addEqualityGroup(point, point1).testEquals();
+ }
+
+ @Test
+ public void getOrCreateTimeSeries_WithNegativePointValues() {
+ LongPoint point = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ point.add(-100);
+ point.add(-33);
+
+ Metric metric = longGaugeMetric.getMetric(testClock);
+ assertThat(metric).isNotEqualTo(null);
+ assertThat(metric.getMetricDescriptor()).isEqualTo(METRIC_DESCRIPTOR);
+ assertThat(metric.getTimeSeriesList().size()).isEqualTo(1);
+ assertThat(metric.getTimeSeriesList().get(0).getPoints().size()).isEqualTo(1);
+ assertThat(metric.getTimeSeriesList().get(0).getPoints().get(0).getValue())
+ .isEqualTo(Value.longValue(-133));
+ assertThat(metric.getTimeSeriesList().get(0).getPoints().get(0).getTimestamp())
+ .isEqualTo(TEST_TIME);
+ assertThat(metric.getTimeSeriesList().get(0).getStartTimestamp()).isEqualTo(null);
+ }
+
+ @Test
+ public void getDefaultTimeSeries() {
+ LongPoint point = longGaugeMetric.getDefaultTimeSeries();
+ point.add(100);
+ point.set(500);
+
+ LongPoint point1 = longGaugeMetric.getDefaultTimeSeries();
+ point1.add(-100);
+
+ Metric metric = longGaugeMetric.getMetric(testClock);
+ assertThat(metric).isNotEqualTo(null);
+ assertThat(metric)
+ .isEqualTo(
+ Metric.create(
+ METRIC_DESCRIPTOR,
+ Collections.singletonList(
+ TimeSeries.createWithOnePoint(
+ DEFAULT_LABEL_VALUES,
+ Point.create(Value.longValue(400), TEST_TIME),
+ null))));
+ new EqualsTester().addEqualityGroup(point, point1).testEquals();
+ }
+
+ @Test
+ public void removeTimeSeries() {
+ longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ assertThat(longGaugeMetric.getMetric(testClock))
+ .isEqualTo(
+ Metric.create(
+ METRIC_DESCRIPTOR,
+ Collections.singletonList(
+ TimeSeries.createWithOnePoint(
+ LABEL_VALUES, Point.create(Value.longValue(0), TEST_TIME), null))));
+
+ longGaugeMetric.removeTimeSeries(LABEL_VALUES);
+ assertThat(longGaugeMetric.getMetric(testClock)).isEqualTo(null);
+ }
+
+ @Test
+ public void removeTimeSeries_WithNullLabelValues() {
+ thrown.expect(NullPointerException.class);
+ thrown.expectMessage("labelValues should not be null.");
+ longGaugeMetric.removeTimeSeries(null);
+ }
+
+ @Test
+ public void clear() {
+ LongPoint longPoint = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ longPoint.add(-11);
+ LongPoint defaultPoint = longGaugeMetric.getDefaultTimeSeries();
+ defaultPoint.set(100);
+
+ Metric metric = longGaugeMetric.getMetric(testClock);
+ assertThat(metric).isNotEqualTo(null);
+ assertThat(metric.getMetricDescriptor()).isEqualTo(METRIC_DESCRIPTOR);
+ assertThat(metric.getTimeSeriesList().size()).isEqualTo(2);
+
+ longGaugeMetric.clear();
+ assertThat(longGaugeMetric.getMetric(testClock)).isEqualTo(null);
+ }
+
+ @Test
+ public void setDefaultLabelValues() {
+ List<LabelKey> labelKeys =
+ Arrays.asList(LabelKey.create("key1", "desc"), LabelKey.create("key2", "desc"));
+ LongGaugeImpl longGauge =
+ new LongGaugeImpl(METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, labelKeys);
+ LongPoint defaultPoint = longGauge.getDefaultTimeSeries();
+ defaultPoint.set(-230);
+
+ Metric metric = longGauge.getMetric(testClock);
+ assertThat(metric).isNotEqualTo(null);
+ assertThat(metric.getTimeSeriesList().size()).isEqualTo(1);
+ assertThat(metric.getTimeSeriesList().get(0).getLabelValues().size()).isEqualTo(2);
+ assertThat(metric.getTimeSeriesList().get(0).getLabelValues().get(0)).isEqualTo(UNSET_VALUE);
+ assertThat(metric.getTimeSeriesList().get(0).getLabelValues().get(1)).isEqualTo(UNSET_VALUE);
+ }
+
+ @Test
+ public void pointImpl_InstanceOf() {
+ LongPoint longPoint = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ assertThat(longPoint).isInstanceOf(LongGaugeImpl.PointImpl.class);
+ }
+
+ @Test
+ public void multipleMetrics_GetMetric() {
+ LongPoint longPoint = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES);
+ longPoint.add(1);
+ longPoint.add(2);
+
+ LongPoint defaultPoint = longGaugeMetric.getDefaultTimeSeries();
+ defaultPoint.set(100);
+
+ LongPoint longPoint1 = longGaugeMetric.getOrCreateTimeSeries(LABEL_VALUES1);
+ longPoint1.add(-100);
+ longPoint1.add(-20);
+
+ List<TimeSeries> timeSeriesList = new ArrayList<TimeSeries>();
+ timeSeriesList.add(
+ TimeSeries.createWithOnePoint(
+ LABEL_VALUES, Point.create(Value.longValue(3), TEST_TIME), null));
+ timeSeriesList.add(
+ TimeSeries.createWithOnePoint(
+ DEFAULT_LABEL_VALUES, Point.create(Value.longValue(100), TEST_TIME), null));
+ timeSeriesList.add(
+ TimeSeries.createWithOnePoint(
+ LABEL_VALUES1, Point.create(Value.longValue(-120), TEST_TIME), null));
+
+ Metric metric = longGaugeMetric.getMetric(testClock);
+ assertThat(metric).isNotEqualTo(null);
+ assertThat(metric.getMetricDescriptor()).isEqualTo(METRIC_DESCRIPTOR);
+ assertThat(metric.getTimeSeriesList().size()).isEqualTo(3);
+ assertThat(metric.getTimeSeriesList()).containsExactlyElementsIn(timeSeriesList);
+ }
+
+ @Test
+ public void empty_GetMetrics() {
+ assertThat(longGaugeMetric.getMetric(testClock)).isEqualTo(null);
+ }
+
+ @Test
+ public void testEquals() {
+ List<LabelKey> labelKeys =
+ Arrays.asList(LabelKey.create("key1", "desc"), LabelKey.create("key2", "desc"));
+ List<LabelValue> labelValues =
+ Arrays.asList(LabelValue.create("value1"), LabelValue.create("value2"));
+
+ LongGaugeImpl longGauge =
+ new LongGaugeImpl(METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, labelKeys);
+
+ LongPoint defaultPoint1 = longGauge.getDefaultTimeSeries();
+ LongPoint defaultPoint2 = longGauge.getDefaultTimeSeries();
+ LongPoint longPoint1 = longGauge.getOrCreateTimeSeries(labelValues);
+ LongPoint longPoint2 = longGauge.getOrCreateTimeSeries(labelValues);
+
+ new EqualsTester()
+ .addEqualityGroup(defaultPoint1, defaultPoint2)
+ .addEqualityGroup(longPoint1, longPoint2)
+ .testEquals();
+
+ longGauge.clear();
+
+ LongPoint newDefaultPointAfterClear = longGauge.getDefaultTimeSeries();
+ LongPoint newLongPointAfterClear = longGauge.getOrCreateTimeSeries(labelValues);
+
+ longGauge.removeTimeSeries(labelValues);
+ LongPoint newLongPointAfterRemove = longGauge.getOrCreateTimeSeries(labelValues);
+
+ new EqualsTester()
+ .addEqualityGroup(defaultPoint1, defaultPoint2)
+ .addEqualityGroup(longPoint1, longPoint2)
+ .addEqualityGroup(newDefaultPointAfterClear)
+ .addEqualityGroup(newLongPointAfterClear)
+ .addEqualityGroup(newLongPointAfterRemove)
+ .testEquals();
+ }
+}