Feature to allow suppressing unsuccessful init error message

Author: hohwille

slf4j-api/src/main/java/org/slf4j/LoggerFactory.java

@@ -54,12 +54,12 @@
  * <p/>
  * <p/>
  * Please note that all methods in <code>LoggerFactory</code> are static.
- * 
- * 
+ *
+ *
  * @author Alexander Dorokhine
  * @author Robert Elliot
  * @author Ceki G&uuml;lc&uuml;
- * 
+ *
  */
 public final class LoggerFactory {
 
@@ -75,6 +75,7 @@ public final class LoggerFactory {
 
     static final String UNSUCCESSFUL_INIT_URL = CODES_PREFIX + "#unsuccessfulInit";
     static final String UNSUCCESSFUL_INIT_MSG = "org.slf4j.LoggerFactory could not be successfully initialized. See also " + UNSUCCESSFUL_INIT_URL;
+    static final String UNSUCCESSFUL_INIT_MSG_SUPPRESSION_SYSTEM_PROPERTY = "slf4j.suppressInitError";
 
     static final int UNINITIALIZED = 0;
     static final int ONGOING_INITIALIZATION = 1;
@@ -158,9 +159,12 @@ private final static void bind() {
             String msg = ncde.getMessage();
             if (messageContainsOrgSlf4jImplStaticLoggerBinder(msg)) {
                 INITIALIZATION_STATE = NOP_FALLBACK_INITIALIZATION;
-                Util.report("Failed to load class \"org.slf4j.impl.StaticLoggerBinder\".");
-                Util.report("Defaulting to no-operation (NOP) logger implementation");
-                Util.report("See " + NO_STATICLOGGERBINDER_URL + " for further details.");
+                boolean suppressError = Util.safeGetBooleanSystemProperty(UNSUCCESSFUL_INIT_MSG_SUPPRESSION_SYSTEM_PROPERTY);
+                if (!suppressError) {
+                  Util.report("Failed to load class \"org.slf4j.impl.StaticLoggerBinder\".");
+                  Util.report("Defaulting to no-operation (NOP) logger implementation");
+                  Util.report("See " + NO_STATICLOGGERBINDER_URL + " for further details.");
+                }
             } else {
                 failedBinding(ncde);
                 throw ncde;
@@ -319,7 +323,7 @@ private static boolean isAmbiguousStaticLoggerBinderPathSet(Set<URL> binderPathS
     /**
      * Prints a warning message on the console if multiple bindings were found
      * on the class path. No reporting is done otherwise.
-     * 
+     *
      */
     private static void reportMultipleBindingAmbiguity(Set<URL> binderPathSet) {
         if (isAmbiguousStaticLoggerBinderPathSet(binderPathSet)) {
@@ -348,7 +352,7 @@ private static void reportActualBinding(Set<URL> binderPathSet) {
     /**
      * Return a logger named according to the name parameter using the
      * statically bound {@link ILoggerFactory} instance.
-     * 
+     *
      * @param name
      *            The name of the logger.
      * @return logger
@@ -361,20 +365,20 @@ public static Logger getLogger(String name) {
     /**
      * Return a logger named corresponding to the class passed as parameter,
      * using the statically bound {@link ILoggerFactory} instance.
-     * 
+     *
      * <p>
      * In case the the <code>clazz</code> parameter differs from the name of the
      * caller as computed internally by SLF4J, a logger name mismatch warning
      * will be printed but only if the
      * <code>slf4j.detectLoggerNameMismatch</code> system property is set to
      * true. By default, this property is not set and no warnings will be
      * printed even in case of a logger name mismatch.
-     * 
+     *
      * @param clazz
      *            the returned logger will be named after clazz
      * @return logger
-     * 
-     * 
+     *
+     *
      * @see <a
      *      href="http://www.slf4j.org/codes.html#loggerNameMismatch">Detected
      *      logger name mismatch</a>
@@ -401,7 +405,7 @@ private static boolean nonMatchingClasses(Class<?> clazz, Class<?> autoComputedC
      * <p/>
      * <p/>
      * ILoggerFactory instance is bound with this class at compile time.
-     * 
+     *
      * @return the ILoggerFactory instance in use
      */
     public static ILoggerFactory getILoggerFactory() {