elf4j version bump

README.md

@@ -49,7 +49,7 @@ application would use runtime-scope for this provider as a dependency:
 ```
 
 Note: Only one logging provider such as this should be in effect at run-time. If multiple providers end up in the final
-build of an application, somehow, then the `elf4j.logger.factory.fqcn` system property will have to be used to select
+build of an application, somehow, then the `elf4j.service.provider.fqcn` system property will have to be used to select
 the desired provider.
 
 ```

pom.xml

@@ -31,7 +31,7 @@
 
     <groupId>io.github.elf4j</groupId>
     <artifactId>elf4j-jul</artifactId>
-    <version>6.0.0</version>
+    <version>6.1.0</version>
 
     <packaging>jar</packaging>
     <name>elf4j-jul</name>
@@ -68,7 +68,7 @@
         <dependency>
             <groupId>io.github.elf4j</groupId>
             <artifactId>elf4j</artifactId>
-            <version>4.0.0</version>
+            <version>4.1.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
@@ -146,7 +146,7 @@
                 <configuration>
                     <java>
                         <palantirJavaFormat>
-                            <version>2.40.0</version>                     <!-- optional -->
+                            <version>2.43.0</version>
                             <style>PALANTIR</style>                       <!-- or AOSP/GOOGLE (optional) -->
                             <formatJavadoc>true
                             </formatJavadoc>          <!-- defaults to false (optional, requires at least Palantir 2.39.0) -->

src/main/java/elf4j/jul/JulLogger.java

@@ -71,13 +71,13 @@ private static JulLogger getLogger(String name) {
         return getLogger(name, DEFAULT_LEVEL);
     }
 
-    private static EnumMap<Level, Map<String, JulLogger>> initLoggerCache() {
+    private static @NonNull EnumMap<Level, Map<String, JulLogger>> initLoggerCache() {
         EnumMap<Level, Map<String, JulLogger>> loggerCache = new EnumMap<>(Level.class);
         EnumSet.allOf(Level.class).forEach(level -> loggerCache.put(level, new ConcurrentHashMap<>()));
         return loggerCache;
     }
 
-    private static String replaceWithJulPlaceholders(String message) {
+    private static @NonNull String replaceWithJulPlaceholders(@NonNull String message) {
         StringBuilder stringBuilder = new StringBuilder();
         char[] chars = message.toCharArray();
         int placeholderIndex = 0;
@@ -92,7 +92,7 @@ private static String replaceWithJulPlaceholders(String message) {
         return stringBuilder.toString();
     }
 
-    private static EnumMap<Level, java.util.logging.Level> setLevelMap() {
+    private static @NonNull EnumMap<Level, java.util.logging.Level> setLevelMap() {
         EnumMap<Level, java.util.logging.Level> levelMap = new EnumMap<>(Level.class);
         levelMap.put(TRACE, java.util.logging.Level.FINEST);
         levelMap.put(DEBUG, java.util.logging.Level.FINE);

src/main/java/elf4j/jul/JulLoggerFactory.java

@@ -28,8 +28,11 @@
 import elf4j.Logger;
 import elf4j.spi.LogServiceProvider;
 
-/** */
+/** Provides an elf4j Logger instance implemented via Java 4 util Logger */
 public class JulLoggerFactory implements LogServiceProvider {
+    /** A default constructor is required by the JDK Service Provider framework */
+    public JulLoggerFactory() {}
+
     @Override
     public Logger logger() {
         return JulLogger.instance();