Remove JMX support

Author: ppkarwasz

log4j-core-test/src/test/java/org/apache/logging/log4j/core/async/AsyncThreadContextTest.java

@@ -25,13 +25,13 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.concurrent.TimeUnit;
+import java.util.function.LongSupplier;
 import org.apache.logging.log4j.ThreadContext;
 import org.apache.logging.log4j.core.Logger;
 import org.apache.logging.log4j.core.LoggerContext;
 import org.apache.logging.log4j.core.ThreadContextTestAccess;
 import org.apache.logging.log4j.core.impl.Log4jContextFactory;
 import org.apache.logging.log4j.core.impl.Log4jPropertyKey;
-import org.apache.logging.log4j.core.jmx.RingBufferAdmin;
 import org.apache.logging.log4j.core.selector.ClassLoaderContextSelector;
 import org.apache.logging.log4j.core.selector.ContextSelector;
 import org.apache.logging.log4j.core.test.CoreLoggerContexts;
@@ -157,19 +157,22 @@ private static void runTest(
 
         final Logger log = context.getLogger("com.foo.Bar");
         final String loggerContextName = context.getClass().getSimpleName();
-        RingBufferAdmin ring;
+        final LongSupplier remainingCapacity;
         if (context instanceof AsyncLoggerContext) {
-            ring = ((AsyncLoggerContext) context).createRingBufferAdmin();
+            remainingCapacity =
+                    ((AsyncLoggerContext) context).getAsyncLoggerDisruptor().getRingBuffer()::remainingCapacity;
         } else {
-            ring = ((AsyncLoggerConfig) log.get()).createRingBufferAdmin("");
+            remainingCapacity =
+                    ((AsyncLoggerConfigDisruptor) ((AsyncLoggerConfig) log.get()).getAsyncLoggerConfigDelegate())
+                            .getRingBuffer()::remainingCapacity;
         }
 
         for (int i = 0; i < LINE_COUNT; i++) {
             // buffer may be full
             if (i >= 128) {
                 waitAtMost(500, TimeUnit.MILLISECONDS)
                         .pollDelay(10, TimeUnit.MILLISECONDS)
-                        .until(() -> ring.getRemainingCapacity() > 0);
+                        .until(() -> remainingCapacity.getAsLong() > 0);
             }
             if ((i & 1) == 1) {
                 ThreadContext.put("count", String.valueOf(i));

log4j-core-test/src/test/java/org/apache/logging/log4j/core/async/QueueFullAbstractTest.java

@@ -19,12 +19,13 @@
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.assertj.core.api.Assertions.assertThat;
 
-import com.lmax.disruptor.dsl.Disruptor;
+import com.lmax.disruptor.RingBuffer;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Optional;
 import java.util.Stack;
 import java.util.concurrent.CountDownLatch;
 import java.util.stream.Collectors;
@@ -36,7 +37,6 @@
 import org.apache.logging.log4j.core.appender.AsyncAppender;
 import org.apache.logging.log4j.core.config.Configuration;
 import org.apache.logging.log4j.core.config.LoggerConfig;
-import org.apache.logging.log4j.core.jmx.RingBufferAdmin;
 import org.apache.logging.log4j.core.util.Constants;
 import org.apache.logging.log4j.status.StatusData;
 import org.apache.logging.log4j.status.StatusLogger;
@@ -234,29 +234,19 @@ static List<String> getMessages(final List<LogEvent> logEvents) {
     }
 
     static long asyncRemainingCapacity(final Logger logger) {
-        if (logger instanceof AsyncLogger) {
-            try {
-                final Field f = field(AsyncLogger.class, "loggerDisruptor");
-                return ((AsyncLoggerDisruptor) f.get(logger))
-                        .getDisruptor()
-                        .getRingBuffer()
-                        .remainingCapacity();
-            } catch (final Exception ex) {
-                throw new RuntimeException(ex);
-            }
+        if (logger instanceof AsyncLogger asyncLogger) {
+            return Optional.ofNullable(asyncLogger.getAsyncLoggerDisruptor())
+                    .map(AsyncLoggerDisruptor::getRingBuffer)
+                    .map(RingBuffer::remainingCapacity)
+                    .orElse(0L);
         } else {
             final LoggerConfig loggerConfig = ((org.apache.logging.log4j.core.Logger) logger).get();
-            if (loggerConfig instanceof AsyncLoggerConfig) {
-                try {
-                    final Object delegate =
-                            field(AsyncLoggerConfig.class, "delegate").get(loggerConfig);
-                    return ((Disruptor) field(AsyncLoggerConfigDisruptor.class, "disruptor")
-                                    .get(delegate))
-                            .getRingBuffer()
-                            .remainingCapacity();
-                } catch (final Exception ex) {
-                    throw new RuntimeException(ex);
-                }
+            if (loggerConfig instanceof AsyncLoggerConfig asyncLoggerConfig) {
+                return Optional.ofNullable(
+                                (AsyncLoggerConfigDisruptor) asyncLoggerConfig.getAsyncLoggerConfigDelegate())
+                        .map(AsyncLoggerConfigDisruptor::getRingBuffer)
+                        .map(RingBuffer::remainingCapacity)
+                        .orElse(0L);
             } else {
                 final Appender async = loggerConfig.getAppenders().get("async");
                 if (async instanceof AsyncAppender) {
@@ -287,24 +277,25 @@ protected static void assertAsyncAppender(final LoggerContext ctx) {
 
     protected static void assertAsyncLogger(final LoggerContext ctx, final int expectedBufferSize) {
         assertThat(ctx).isInstanceOf(AsyncLoggerContext.class);
-        final RingBufferAdmin ringBufferAdmin = ((AsyncLoggerContext) ctx).createRingBufferAdmin();
-        assertThat(ringBufferAdmin.getRemainingCapacity()).isEqualTo(expectedBufferSize);
+        assertThat(((AsyncLoggerContext) ctx)
+                        .getAsyncLoggerDisruptor()
+                        .getRingBuffer()
+                        .getBufferSize())
+                .isEqualTo(expectedBufferSize);
 
         final Configuration config = ctx.getConfiguration();
         assertThat(config).isNotNull();
         assertThat(config.getRootLogger()).isNotInstanceOf(AsyncLoggerConfig.class);
     }
 
-    protected static void assertAsyncLoggerConfig(final LoggerContext ctx, final int expectedBufferSize)
-            throws ReflectiveOperationException {
+    protected static void assertAsyncLoggerConfig(final LoggerContext ctx, final int expectedBufferSize) {
         assertThat(ctx).isNotInstanceOf(AsyncLoggerContext.class);
 
         final Configuration config = ctx.getConfiguration();
         assertThat(config).isNotNull();
         assertThat(config.getRootLogger()).isInstanceOf(AsyncLoggerConfig.class);
         final AsyncLoggerConfigDisruptor disruptor = (AsyncLoggerConfigDisruptor) config.getAsyncLoggerConfigDelegate();
-        final Field sizeField = field(AsyncLoggerConfigDisruptor.class, "ringBufferSize");
-        assertThat(sizeField.get(disruptor)).isEqualTo(expectedBufferSize);
+        assertThat(disruptor.getRingBuffer().getBufferSize()).isEqualTo(expectedBufferSize);
     }
 
     protected static void assertFormatMessagesInBackground() {

log4j-core-test/src/test/java/org/apache/logging/log4j/core/jmx/ServerTest.java

@@ -42,7 +42,6 @@
 import org.apache.logging.log4j.core.config.NullConfiguration;
 import org.apache.logging.log4j.core.config.Reconfigurable;
 import org.apache.logging.log4j.core.impl.Log4jPropertyKey;
-import org.apache.logging.log4j.core.jmx.Server;
 import org.apache.logging.log4j.core.util.Cancellable;
 import org.apache.logging.log4j.core.util.ExecutorServices;
 import org.apache.logging.log4j.core.util.NetUtils;
@@ -436,13 +435,7 @@ public boolean stop(final long timeout, final TimeUnit timeUnit) {
             }
 
             this.setStopping();
-            String name = getName();
-            try {
-                Server.unregisterLoggerContext(name); // LOG4J2-406, LOG4J2-500
-            } catch (final LinkageError | Exception e) {
-                // LOG4J2-1506 Hello Android, GAE
-                LOGGER.error("Unable to unregister MBeans", e);
-            }
+
             if (shutdownCallback != null) {
                 shutdownCallback.cancel();
                 shutdownCallback = null;
@@ -736,13 +729,6 @@ public Configuration setConfiguration(final Configuration config) {
                 notifyConfigurationStopped(prev);
             }
 
-            try {
-                Server.reregisterMBeansAfterReconfigure();
-            } catch (final LinkageError | Exception e) {
-                // LOG4J2-716: Android has no java.lang.management
-                LOGGER.error("Could not reconfigure JMX", e);
-            }
-
             return prev;
         } finally {
             configLock.unlock();

log4j-core/src/main/java/org/apache/logging/log4j/core/LoggerContext.java

@@ -27,7 +27,6 @@
 import org.apache.logging.log4j.core.config.LoggerConfig;
 import org.apache.logging.log4j.core.config.Property;
 import org.apache.logging.log4j.core.impl.LogEventFactory;
-import org.apache.logging.log4j.core.jmx.RingBufferAdmin;
 import org.apache.logging.log4j.plugins.Configurable;
 import org.apache.logging.log4j.plugins.Plugin;
 import org.apache.logging.log4j.plugins.PluginFactory;
@@ -210,17 +209,6 @@ public boolean stop(final long timeout, final TimeUnit timeUnit) {
         return true;
     }
 
-    /**
-     * Creates and returns a new {@code RingBufferAdmin} that instruments the
-     * ringbuffer of this {@code AsyncLoggerConfig}.
-     *
-     * @param contextName name of the {@code LoggerContext}
-     * @return a new {@code RingBufferAdmin} that instruments the ringbuffer
-     */
-    public RingBufferAdmin createRingBufferAdmin(final String contextName) {
-        return delegate.createRingBufferAdmin(contextName, getName());
-    }
-
     // Note: for asynchronous loggers, includeLocation default is FALSE
     protected static boolean includeLocation(final String includeLocationConfigValue) {
         return Boolean.parseBoolean(includeLocationConfigValue);

log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfig.java

@@ -19,24 +19,13 @@
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.core.LogEvent;
 import org.apache.logging.log4j.core.impl.LogEventFactory;
-import org.apache.logging.log4j.core.jmx.RingBufferAdmin;
 
 /**
  * Encapsulates the mechanism used to log asynchronously. There is one delegate per configuration, which is shared by
  * all AsyncLoggerConfig objects in the configuration.
  */
 public interface AsyncLoggerConfigDelegate {
 
-    /**
-     * Creates and returns a new {@code RingBufferAdmin} that instruments the ringbuffer of this
-     * {@code AsyncLoggerConfig}.
-     *
-     * @param contextName name of the {@code LoggerContext}
-     * @param loggerConfigName name of the logger config
-     * @return the RingBufferAdmin that instruments the ringbuffer
-     */
-    RingBufferAdmin createRingBufferAdmin(final String contextName, final String loggerConfigName);
-
     /**
      * Returns the {@code EventRoute} for the event with the specified level.
      *

log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfigDelegate.java

@@ -39,7 +39,6 @@
 import org.apache.logging.log4j.core.impl.LogEventFactory;
 import org.apache.logging.log4j.core.impl.MutableLogEvent;
 import org.apache.logging.log4j.core.impl.ReusableLogEventFactory;
-import org.apache.logging.log4j.core.jmx.RingBufferAdmin;
 import org.apache.logging.log4j.core.util.Log4jThread;
 import org.apache.logging.log4j.core.util.Log4jThreadFactory;
 import org.apache.logging.log4j.core.util.Throwables;
@@ -426,14 +425,8 @@ private LogEvent ensureImmutable(final LogEvent event) {
         return result;
     }
 
-    /*
-     * (non-Javadoc)
-     *
-     * @see org.apache.logging.log4j.core.async.AsyncLoggerConfigDelegate#createRingBufferAdmin(java.lang.String,
-     * java.lang.String)
-     */
-    @Override
-    public RingBufferAdmin createRingBufferAdmin(final String contextName, final String loggerConfigName) {
-        return RingBufferAdmin.forAsyncLoggerConfig(disruptor.getRingBuffer(), contextName, loggerConfigName);
+    // package-protected for tests
+    RingBuffer<Log4jEventWrapper> getRingBuffer() {
+        return disruptor.getRingBuffer();
     }
 }

log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfigDisruptor.java

@@ -22,7 +22,6 @@
 import org.apache.logging.log4j.core.LoggerContext;
 import org.apache.logging.log4j.core.config.Configuration;
 import org.apache.logging.log4j.core.config.DefaultConfiguration;
-import org.apache.logging.log4j.core.jmx.RingBufferAdmin;
 import org.apache.logging.log4j.message.MessageFactory;
 import org.apache.logging.log4j.plugins.di.ConfigurableInstanceFactory;
 import org.apache.logging.log4j.status.StatusLogger;
@@ -131,13 +130,8 @@ public boolean stop(final long timeout, final TimeUnit timeUnit) {
         return true;
     }
 
-    /**
-     * Creates and returns a new {@code RingBufferAdmin} that instruments the ringbuffer of the {@code AsyncLogger}
-     * objects in this {@code LoggerContext}.
-     *
-     * @return a new {@code RingBufferAdmin} that instruments the ringbuffer
-     */
-    public RingBufferAdmin createRingBufferAdmin() {
-        return loggerDisruptor.createRingBufferAdmin(getName());
+    // package-protected for tests
+    AsyncLoggerDisruptor getAsyncLoggerDisruptor() {
+        return loggerDisruptor;
     }
 }