Adds logback-classic-1.2 instrumentation

instrumentation/logback-classic-1.2/build.gradle

@@ -0,0 +1,19 @@
+jar {
+    manifest { attributes 'Implementation-Title': 'com.newrelic.instrumentation.logback-classic-1.2' }
+}
+
+dependencies {
+    implementation(project(":agent-bridge"))
+    implementation("ch.qos.logback:logback-classic:1.2.6")
+}
+
+verifyInstrumentation {
+    passesOnly("ch.qos.logback:logback-classic:[0.9.3,)")
+    excludeRegex '.*(alpha|groovyless).*'
+    excludeRegex 'ch.qos.logback:logback-classic:0.9.6'
+}
+
+site {
+    title 'Logback'
+    type 'Framework'
+}

instrumentation/logback-classic-1.2/src/main/java/com/nr/agent/instrumentation/logbackclassic12/Logger_Instrumentation.java

@@ -0,0 +1,19 @@
+package com.nr.agent.instrumentation.logbackclassic12;
+
+import ch.qos.logback.classic.Level;
+import com.newrelic.api.agent.NewRelic;
+import com.newrelic.api.agent.weaver.MatchType;
+import com.newrelic.api.agent.weaver.Weave;
+import com.newrelic.api.agent.weaver.Weaver;
+import org.slf4j.Marker;
+
+@Weave(originalName = "ch.qos.logback.classic.Logger", type = MatchType.Interface)
+public abstract class Logger_Instrumentation {
+
+    private void buildLoggingEventAndAppend(final String localFQCN, final Marker marker, final Level level, final String msg, final Object[] params,
+            final Throwable t) {
+        NewRelic.incrementCounter("Logging/lines");
+        NewRelic.incrementCounter("Logging/lines/" + level);
+        Weaver.callOriginal();
+    }
+}

instrumentation/logback-classic-1.2/src/test/java/com/nr/agent/instrumentation/logbackclassic12/Logger_InstrumentationTest.java

@@ -0,0 +1,68 @@
+package com.nr.agent.instrumentation.logbackclassic12;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import com.newrelic.agent.introspec.InstrumentationTestConfig;
+import com.newrelic.agent.introspec.InstrumentationTestRunner;
+import com.newrelic.agent.introspec.MetricsHelper;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.slf4j.LoggerFactory;
+
+@RunWith(InstrumentationTestRunner.class)
+@InstrumentationTestConfig(includePrefixes = { "com.nr.agent.instrumentation.logbackclassic12" })
+public class Logger_InstrumentationTest {
+
+    private static final String CAPTURED = "This log message should be captured";
+    private static final String NOT_CAPTURED = "This message should NOT be captured";
+
+    @Test
+    public void shouldIncrementEmittedLogsCountersIndependentlyIfLogLevelEnabled() {
+        // Given
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger_InstrumentationTest.class);
+        logger.setLevel(Level.INFO);
+
+        // When
+        logger.trace(NOT_CAPTURED);
+        logger.debug(NOT_CAPTURED);
+        logger.info(CAPTURED);
+        logger.info(CAPTURED);
+        logger.info(CAPTURED);
+        logger.warn(CAPTURED);
+        logger.warn(CAPTURED);
+        logger.warn(CAPTURED);
+        logger.warn(CAPTURED);
+        logger.error(CAPTURED);
+
+        // Then
+        Assert.assertEquals(8, MetricsHelper.getUnscopedMetricCount("Logging/lines"));
+        Assert.assertEquals(0, MetricsHelper.getUnscopedMetricCount("Logging/lines/TRACE"));
+        Assert.assertEquals(0, MetricsHelper.getUnscopedMetricCount("Logging/lines/DEBUG"));
+        Assert.assertEquals(3, MetricsHelper.getUnscopedMetricCount("Logging/lines/INFO"));
+        Assert.assertEquals(4, MetricsHelper.getUnscopedMetricCount("Logging/lines/WARN"));
+        Assert.assertEquals(1, MetricsHelper.getUnscopedMetricCount("Logging/lines/ERROR"));
+    }
+
+    @Test
+    public void shouldIncrementAllEmittedLogCountersIfLogLevelIsSetToTrace() {
+        // Given
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger_InstrumentationTest.class);
+        logger.setLevel(Level.TRACE);
+
+        // When
+        logger.trace(CAPTURED);
+        logger.debug(CAPTURED);
+        logger.info(CAPTURED);
+        logger.warn(CAPTURED);
+        logger.error(CAPTURED);
+
+        // Then
+        Assert.assertEquals(5, MetricsHelper.getUnscopedMetricCount("Logging/lines"));
+        Assert.assertEquals(1, MetricsHelper.getUnscopedMetricCount("Logging/lines/TRACE"));
+        Assert.assertEquals(1, MetricsHelper.getUnscopedMetricCount("Logging/lines/DEBUG"));
+        Assert.assertEquals(1, MetricsHelper.getUnscopedMetricCount("Logging/lines/INFO"));
+        Assert.assertEquals(1, MetricsHelper.getUnscopedMetricCount("Logging/lines/WARN"));
+        Assert.assertEquals(1, MetricsHelper.getUnscopedMetricCount("Logging/lines/ERROR"));
+    }
+}

settings.gradle

@@ -223,6 +223,7 @@ include 'instrumentation:kafka-clients-heartbeat-2.1.0'
 include 'instrumentation:kafka-clients-metrics-0.10.0.0'
 include 'instrumentation:kafka-clients-metrics-2.0.0'
 include 'instrumentation:kafka-clients-spans-0.11.0.0'
+include 'instrumentation:logback-classic-1.2'
 include 'instrumentation:mongodb-async-3.4'
 include 'instrumentation:mongodb-async-3.6'
 include 'instrumentation:mongodb-async-3.7'