remove logger abstraction

Author: mwangggg

src/main/java/io/cryostat/core/log/Logger.java

@@ -26,7 +26,7 @@
 import org.openjdk.jmc.jdp.client.DiscoveryListener;
 import org.openjdk.jmc.jdp.client.JDPClient;
 
-import io.cryostat.core.log.Logger;
+import org.slf4j.Logger;
 
 public class JvmDiscoveryClient {
 
@@ -67,6 +67,7 @@ public void onDiscovery(DiscoveryEvent evt) {
                                 break;
                             default:
                                 logger.error(
+                                        "Exception thrown",
                                         new IllegalArgumentException(evt.getKind().toString()));
                         }
                     }

src/main/java/io/cryostat/core/net/discovery/JvmDiscoveryClient.java

@@ -55,10 +55,9 @@
 import org.openjdk.jmc.flightrecorder.rules.TypedResult;
 import org.openjdk.jmc.flightrecorder.rules.util.RulesToolkit;
 
-import io.cryostat.core.log.Logger;
-
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import org.apache.commons.io.input.CountingInputStream;
+import org.slf4j.Logger;
 
 /**
  * Re-implementation of {@link ReportGenerator} where the report generation task is represented by a
@@ -219,7 +218,7 @@ private Pair<Collection<IResult>, Long> generateResultHelper(
                     f.cancel(true);
                 }
             }
-            logger.warn(e);
+            logger.warn("Exception thrown", e);
             throw e;
         }
     }

src/main/java/io/cryostat/core/reports/InterruptibleReportGenerator.java

@@ -30,17 +30,19 @@
 import org.openjdk.jmc.rjmx.services.jfr.IFlightRecorderService;
 
 import io.cryostat.core.FlightRecorderException;
-import io.cryostat.core.log.Logger;
 import io.cryostat.core.net.JFRConnection;
 
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 import org.jsoup.parser.Parser;
 import org.jsoup.select.Elements;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class RemoteTemplateService extends AbstractTemplateService {
 
+    private final Logger logger = LoggerFactory.getLogger(getClass());
     private final JFRConnection conn;
 
     public RemoteTemplateService(JFRConnection conn) {
@@ -129,7 +131,7 @@ protected List<XMLModel> getTemplateModels() throws FlightRecorderException {
                                 try {
                                     return EventConfiguration.createModel(xmlText);
                                 } catch (ParseException | IOException e) {
-                                    Logger.INSTANCE.warn(e);
+                                    logger.warn("Exception thrown", e);
                                     return null;
                                 }
                             })

src/main/java/io/cryostat/core/templates/RemoteTemplateService.java

@@ -28,7 +28,6 @@
 import org.openjdk.jmc.jdp.client.DiscoveryListener;
 import org.openjdk.jmc.jdp.client.JDPClient;
 
-import io.cryostat.core.log.Logger;
 import io.cryostat.core.net.discovery.JvmDiscoveryClient.EventKind;
 
 import org.hamcrest.MatcherAssert;
@@ -42,13 +41,15 @@
 import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 @ExtendWith(MockitoExtension.class)
 class JvmDiscoveryClientTest {
 
     JvmDiscoveryClient client;
     @Mock JDPClient jdp;
-    @Mock Logger logger;
+    @Mock Logger logger = LoggerFactory.getLogger(getClass());
 
     @BeforeEach
     void setup() {

src/test/java/io/cryostat/core/net/discovery/JvmDiscoveryClientTest.java

@@ -24,7 +24,6 @@
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 
-import io.cryostat.core.log.Logger;
 import io.cryostat.core.reports.InterruptibleReportGenerator.AnalysisResult;
 
 import org.hamcrest.MatcherAssert;
@@ -35,12 +34,15 @@
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 @ExtendWith(MockitoExtension.class)
 class InterruptibleReportGeneratorTest {
 
     @Mock InputStream recording;
-    @Mock Logger logger;
+    @Mock Logger logger = LoggerFactory.getLogger(getClass());
+
     InterruptibleReportGenerator generator;
 
     @BeforeEach()