Worked to remove code smells and code quality

.classpath

@@ -24,7 +24,7 @@
 			<attribute name="test" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>

.settings/org.eclipse.jdt.core.prefs

 eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
-org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=ignore
 org.eclipse.jdt.core.compiler.release=disabled
-org.eclipse.jdt.core.compiler.source=1.8
+org.eclipse.jdt.core.compiler.source=11

src/main/java/beamline/models/algorithms/InfiniteSizeDirectlyFollowsMapper.java

@@ -26,7 +26,7 @@ public class InfiniteSizeDirectlyFollowsMapper extends StreamMiningAlgorithm<Dir
 	private Map<String, BEvent> map = new HashMap<>();
 
 	@Override
-	public DirectlyFollowsRelation ingest(BEvent event) throws Exception {
+	public DirectlyFollowsRelation ingest(BEvent event) {
 		String caseId = event.getTraceName();
 		DirectlyFollowsRelation toRet = null;
 		

src/main/java/beamline/models/algorithms/StreamMiningAlgorithm.java

@@ -44,10 +44,8 @@ public abstract class StreamMiningAlgorithm<T extends Response> extends RichFlat
 	 * 
 	 * @param event the new event being observed
 	 * @return the result of the mining of the event
-	 * @throws Exception general exception that can occur with the ingestion of
-	 * the event
 	 */
-	public abstract T ingest(BEvent event) throws Exception;
+	public abstract T ingest(BEvent event);
 	
 	/**
 	 * Returns the total number of events processed so far

src/main/java/beamline/sources/XesLogSource.java

@@ -4,12 +4,18 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
+import org.apache.commons.lang3.SystemUtils;
 import org.deckfour.xes.extension.std.XConceptExtension;
 import org.deckfour.xes.extension.std.XTimeExtension;
 import org.deckfour.xes.in.XMxmlGZIPParser;
@@ -61,9 +67,9 @@ public class XesLogSource extends BeamlineAbstractSource {
 	 * is created
 	 */
 	public XesLogSource(XLog log) throws IOException {
-		File tmpFile = Files.createTempFile("file", ".xes.gz").toFile();
-		new XesXmlGZIPSerializer().serialize(log, new FileOutputStream(tmpFile));
-		this.fileName = tmpFile.getAbsolutePath();
+		Path tmpFile = getTempFile();
+		new XesXmlGZIPSerializer().serialize(log, new FileOutputStream(tmpFile.toFile()));
+		this.fileName = tmpFile.toFile().getAbsolutePath();
 	}
 	
 	@Override
@@ -148,4 +154,19 @@ public class XesLogSource extends BeamlineAbstractSource {
 		// sort events
 		Collections.sort(events);
 	}
+	
+	private Path getTempFile() throws IOException {
+		Path p = null;
+		if (SystemUtils.IS_OS_UNIX) {
+			FileAttribute<Set<PosixFilePermission>> attr = PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rwx------"));
+			p = Files.createTempFile("log", ".xes.gz", attr); // Compliant
+		} else {
+			File f = Files.createTempFile("log", ".xes.gz").toFile(); // Compliant
+			f.setReadable(true, true);
+			f.setWritable(true, true);
+			f.setExecutable(true, true);
+			p = f.toPath();
+		}
+		return p;
+	}
 }

src/test/java/beamline/tests/AlgorithmTest.java

@@ -22,7 +22,7 @@ public class AlgorithmTest {
 			private static final long serialVersionUID = -8445717838576941924L;
 
 			@Override
-			public StringResponse ingest(BEvent event) throws Exception {
+			public StringResponse ingest(BEvent event) {
 				return new StringResponse(event.getProcessName() + event.getEventName() + event.getTraceName());
 			}
 		};
@@ -51,7 +51,7 @@ public class AlgorithmTest {
 			private static final long serialVersionUID = -8445717838576941924L;
 
 			@Override
-			public StringResponse ingest(BEvent event) throws Exception {
+			public StringResponse ingest(BEvent event) {
 				return new StringResponse(event.getProcessName() + event.getEventName() + event.getTraceName());
 			}
 		};

src/test/java/beamline/tests/ResponsesTest.java

@@ -5,7 +5,7 @@ import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import java.util.Date;
+import java.util.Random;
 import java.util.UUID;
 
 import org.junit.jupiter.api.Test;
@@ -22,9 +22,9 @@ public class ResponsesTest {
 	public void response_tests() {
 		Response r = new Response();
 		
-		Date now = new Date();
-		r.setProcessedEvents(now.getTime());
-		assertEquals(now, r.getProcessedEvents());
+		long rand = new Random().nextLong();
+		r.setProcessedEvents(rand);
+		assertEquals(rand, r.getProcessedEvents());
 	}
 	
 	@Test

src/test/java/beamline/tests/SourcesTest.java

@@ -212,12 +212,10 @@ public class SourcesTest {
 						java.nio.file.Files.write(tmpFile.toPath(), toWrite.getBytes(), StandardOpenOption.APPEND);
 					}
 				});
-//			JobClient job = env.executeAsync();
 			env.executeAsync();
 			
 			Thread.sleep(2000);
 			
-			System.out.println("going");
 			MqttClient client = new MqttClient("tcp://localhost:9999", "clientid", new MemoryPersistence());
 			client.connect();
 			publish(client, "c1", "a11");
@@ -227,8 +225,6 @@ public class SourcesTest {
 			publish(client, "c2", "a23");
 			
 			Thread.sleep(2000);
-//			job.cancel();
-			System.out.println("Done");
 			assertEquals(
 					"name-c1-a11/name-c2-a21/name-c2-a22/name-c1-a12/name-c2-a23/",
 					org.apache.commons.io.FileUtils.readFileToString(tmpFile, "utf-8"));