LOGABCK-1717 configuirators shipping with logback-classic are instantiated via reflection

Signed-off-by: Ceki Gulcu <ceki@qos.ch>

Author: ceki

logback-classic/src/main/java/ch/qos/logback/classic/ClassicConstants.java

@@ -60,4 +60,6 @@ public class ClassicConstants {
 
     public static final String FINALIZE_SESSION = "FINALIZE_SESSION";
     public static final Marker FINALIZE_SESSION_MARKER = MarkerFactory.getMarker(FINALIZE_SESSION);
+    final public static String AUTOCONFIG_FILE = "logback.xml";
+    final public static String TEST_AUTOCONFIG_FILE = "logback-test.xml";
 }

logback-classic/src/main/java/ch/qos/logback/classic/joran/SerializedModelConfigurator.java

@@ -98,10 +98,13 @@ private void buildModelInterpretationContext(Model topModel) {
     }
 
     private Model retrieveModel(URL url)  {
+        long start = System.currentTimeMillis();
         try (InputStream is = url.openStream()) {
             HardenedModelInputStream hmis = new HardenedModelInputStream(is);
 
             Model model = (Model) hmis.readObject();
+            long diff = System.currentTimeMillis() - start;
+            addInfo("Model at ["+url+"] read in "+diff + " milliseconds");
             return model;
         } catch(IOException e) {
             addError("Failed to open "+url, e);

logback-classic/src/main/java/ch/qos/logback/classic/spi/LoggingEvent.java

@@ -332,7 +332,7 @@ public long getSequenceNumber() {
         return sequenceNumber;
     }
 
-    public void setSquenceNumber(long sn) {
+    public void setSequenceNumber(long sn) {
         sequenceNumber = sn;
     }
 

logback-classic/src/main/java/ch/qos/logback/classic/util/ContextInitializer.java

@@ -37,13 +37,22 @@
  */
 public class ContextInitializer {
 
-    final public static String AUTOCONFIG_FILE = DefaultJoranConfigurator.AUTOCONFIG_FILE;
-    final public static String TEST_AUTOCONFIG_FILE = DefaultJoranConfigurator.TEST_AUTOCONFIG_FILE;
+    /**
+     *  @deprecated Please use ClassicConstants.AUTOCONFIG_FILE instead
+     */
+    final public static String AUTOCONFIG_FILE = ClassicConstants.AUTOCONFIG_FILE;
+    /**
+     * @deprecated Please use ClassicConstants.TEST_AUTOCONFIG_FILE instead
+     */
+    final public static String TEST_AUTOCONFIG_FILE = ClassicConstants.TEST_AUTOCONFIG_FILE;
     /**
      * @deprecated Please use ClassicConstants.CONFIG_FILE_PROPERTY instead
      */
     final public static String CONFIG_FILE_PROPERTY = ClassicConstants.CONFIG_FILE_PROPERTY;
 
+    String[] INTERNAL_CONFIGURATOR_CLASSNAME_LIST = {"ch.qos.logback.classic.joran.SerializedModelConfigurator",
+            "ch.qos.logback.classic.util.DefaultJoranConfigurator", "ch.qos.logback.classic.BasicConfigurator"};
+
     final LoggerContext loggerContext;
 
     final ContextAware contextAware;
@@ -66,41 +75,59 @@ public void autoConfig(ClassLoader classLoader) throws JoranException {
         StatusListenerConfigHelper.installIfAsked(loggerContext);
 
 
+        // invoke custom configurators
         List<Configurator> configuratorList = ClassicEnvUtil.loadFromServiceLoader(Configurator.class, classLoader);
-
         configuratorList.sort(rankComparator);
-
-        printConfiguratorOrder(configuratorList);
+        if (configuratorList.isEmpty()) {
+            contextAware.addInfo("No custom configurators were discovered as a service.");
+        } else {
+            printConfiguratorOrder(configuratorList);
+        }
 
         for (Configurator c : configuratorList) {
-            try {
-                long start = System.currentTimeMillis();
-                contextAware.addInfo("Constructed configurator of type " + c.getClass());
-                c.setContext(loggerContext);
-                Configurator.ExecutionStatus status = c.configure(loggerContext);
-                printDuration(start, c, status);
-                if (status == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY) {
-                    return;
-                }
-            } catch (Exception e) {
-                throw new LogbackException(String.format("Failed to initialize Configurator: %s using ServiceLoader",
-                        c != null ? c.getClass().getCanonicalName() : "null"), e);
-            }
+            if (invokeConfigure(c) == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY)
+                return;
         }
 
+        // invoke internal configurators
+        for (String configuratorClassName : INTERNAL_CONFIGURATOR_CLASSNAME_LIST) {
+            contextAware.addInfo("Trying to configure with "+configuratorClassName);
+            Configurator c = instantiateConfiguratorByClassName(configuratorClassName, classLoader);
+            if(c == null)
+                continue;
+            if (invokeConfigure(c) == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY)
+                return;
+        }
+    }
 
+    private Configurator instantiateConfiguratorByClassName(String configuratorClassName, ClassLoader classLoader) {
+        try {
+            Class<?> classObj = classLoader.loadClass(configuratorClassName);
+            return (Configurator) classObj.getConstructor().newInstance();
+        } catch (ReflectiveOperationException  e) {
+            contextAware.addInfo("Instantiation failure: " + e.toString());
+            return null;
+        }
+    }
 
-//        long startJoranConfiguration = System.currentTimeMillis();
-//        Configurator.ExecutionStatus es = attemptConfigurationUsingJoranUsingReflexion(classLoader);
-//
-//        if (es == Configurator.ExecutionStatus.DO_NOT_INVOKE_NEXT_IF_ANY) {
-//            printDuration(startJoranConfiguration, JORAN_CONFIGURATION_DURATION_MSG, true);
-//            return;
-//        }
-//        printDuration(startJoranConfiguration, JORAN_CONFIGURATION_DURATION_MSG, false);
-//
-//        // at this stage invoke basicConfigurator
-//        fallbackOnToBasicConfigurator();
+    /**
+     *
+     * @param configurator
+     * @return true if enclosing loop should break, false otherwise
+     */
+    private Configurator.ExecutionStatus invokeConfigure(Configurator configurator) {
+        try {
+            long start = System.currentTimeMillis();
+            contextAware.addInfo("Constructed configurator of type " + configurator.getClass());
+            configurator.setContext(loggerContext);
+            Configurator.ExecutionStatus status = configurator.configure(loggerContext);
+            printDuration(start, configurator, status);
+            return status;
+
+        } catch (Exception e) {
+            throw new LogbackException(String.format("Failed to initialize or to run Configurator: %s",
+                    configurator != null ? configurator.getClass().getCanonicalName() : "null"), e);
+        }
     }
 
     private void printConfiguratorOrder(List<Configurator> configuratorList) {
@@ -131,13 +158,6 @@ private Configurator.ExecutionStatus attemptConfigurationUsingJoranUsingReflexio
 
     }
 
-    private void fallbackOnToBasicConfigurator() {
-        BasicConfigurator basicConfigurator = new BasicConfigurator();
-        basicConfigurator.setContext(loggerContext);
-        basicConfigurator.configure(loggerContext);
-    }
-
-
     Comparator<Configurator> rankComparator = new Comparator<Configurator>() {
         @Override
         public int compare(Configurator c1, Configurator c2) {

logback-classic/src/main/java/ch/qos/logback/classic/util/DefaultJoranConfigurator.java

@@ -26,9 +26,6 @@
 @ConfiguratorRank(value = ConfiguratorRank.NOMINAL)
 public class DefaultJoranConfigurator extends ContextAwareBase implements Configurator {
 
-    final public static String AUTOCONFIG_FILE = "logback.xml";
-    final public static String TEST_AUTOCONFIG_FILE = "logback-test.xml";
-
     @Override
     public ExecutionStatus configure(Context context) {
         URL url = performMultiStepConfigurationFileSearch(true);
@@ -52,12 +49,12 @@ private URL performMultiStepConfigurationFileSearch(boolean updateStatus) {
             return url;
         }
 
-        url = getResource(TEST_AUTOCONFIG_FILE, myClassLoader, updateStatus);
+        url = getResource(ClassicConstants.TEST_AUTOCONFIG_FILE, myClassLoader, updateStatus);
         if (url != null) {
             return url;
         }
 
-        return getResource(AUTOCONFIG_FILE, myClassLoader, updateStatus);
+        return getResource(ClassicConstants.AUTOCONFIG_FILE, myClassLoader, updateStatus);
     }
     public void configureByResource(URL url) throws JoranException {
         if (url == null) {

logback-classic/src/main/java9/module-info.java

@@ -18,9 +18,6 @@
   requires ch.qos.logback.core;
   uses ch.qos.logback.core.spi.Configurator;
   provides org.slf4j.spi.SLF4JServiceProvider with ch.qos.logback.classic.spi.LogbackServiceProvider;
-  provides ch.qos.logback.core.spi.Configurator with ch.qos.logback.classic.joran.SerializedModelConfigurator,
-          ch.qos.logback.classic.util.DefaultJoranConfigurator,
-          ch.qos.logback.classic.BasicConfigurator;
 
   exports ch.qos.logback.classic;
   exports ch.qos.logback.classic.boolex;

logback-classic/src/main/resources/META-INF/services/ch.qos.logback.core.spi.Configurator

@@ -423,7 +423,7 @@ public void testSequenceNumber() {
         assertTrue(converter.isStarted());
         LoggingEvent event = makeLoggingEvent(null);
 
-        event.setSquenceNumber(123);
+        event.setSequenceNumber(123);
         assertEquals("123", converter.convert(event));
         StatusPrinter.print(loggerContext);
     }