Align prefix match in BufferCounterService with DefaultCounterService

Closes gh-10278

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/buffer/BufferCounterService.java

@@ -25,6 +25,7 @@ import org.springframework.lang.UsesJava8;
  * Fast implementation of {@link CounterService} using {@link CounterBuffers}.
  *
  * @author Dave Syer
+ * @author Venil Noronha
  * @since 1.3.0
  */
 @UsesJava8
@@ -62,7 +63,7 @@ public class BufferCounterService implements CounterService {
 		if (cached != null) {
 			return cached;
 		}
-		if (metricName.startsWith("counter") || metricName.startsWith("meter")) {
+		if (metricName.startsWith("counter.") || metricName.startsWith("meter.")) {
 			return metricName;
 		}
 		String name = "counter." + metricName;

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/buffer/BufferCounterServiceTests.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2017 the original author or 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 org.springframework.boot.actuate.metrics.buffer;
+
+import org.junit.Test;
+
+import org.springframework.boot.actuate.metrics.CounterService;
+import org.springframework.boot.actuate.metrics.Metric;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+/**
+ * Standard tests for {@link BufferCounterService}.
+ *
+ * @author Venil Noronha
+ */
+public class BufferCounterServiceTests {
+
+	private CounterBuffers counters = new CounterBuffers();
+
+	private CounterService service = new BufferCounterService(this.counters);
+
+	private BufferMetricReader reader = new BufferMetricReader(this.counters, new GaugeBuffers());
+
+	@Test
+	public void matchExtendedPrefix() {
+		this.service.increment("foo");
+		Metric<?> fooMetric = this.reader.findOne("foo");
+		Metric<?> counterFooMetric = this.reader.findOne("counter.foo");
+		assertNull(fooMetric);
+		assertNotNull(counterFooMetric);
+		assertEquals(1L, counterFooMetric.getValue());
+	}
+
+	@Test
+	public void matchCounterPrefix() {
+		this.service.increment("counterfoo");
+		Metric<?> counterfooMetric = this.reader.findOne("counterfoo");
+		Metric<?> counterCounterfooMetric = this.reader.findOne("counter.counterfoo");
+		assertNull(counterfooMetric);
+		assertNotNull(counterCounterfooMetric);
+		assertEquals(1L, counterCounterfooMetric.getValue());
+	}
+
+	@Test
+	public void matchCounterDotPrefix() {
+		this.service.increment("counter.foo");
+		Metric<?> counterFooMetric = this.reader.findOne("counter.foo");
+		Metric<?> counterCounterFooMetric = this.reader.findOne("counter.counter.foo");
+		assertNull(counterCounterFooMetric);
+		assertNotNull(counterFooMetric);
+		assertEquals(1L, counterFooMetric.getValue());
+	}
+
+	@Test
+	public void matchMeterPrefix() {
+		this.service.increment("meterfoo");
+		Metric<?> meterfooMetric = this.reader.findOne("meterfoo");
+		Metric<?> counterMeterfooMetric = this.reader.findOne("counter.meterfoo");
+		assertNull(meterfooMetric);
+		assertNotNull(counterMeterfooMetric);
+		assertEquals(1L, counterMeterfooMetric.getValue());
+	}
+
+	@Test
+	public void matchMeterDotPrefix() {
+		this.service.increment("meter.foo");
+		Metric<?> meterFooMetric = this.reader.findOne("meter.foo");
+		Metric<?> counterMeterFooMetric = this.reader.findOne("counter.meter.foo");
+		assertNull(counterMeterFooMetric);
+		assertNotNull(meterFooMetric);
+		assertEquals(1L, meterFooMetric.getValue());
+	}
+
+}