geode-logging/src/main/java/org/apache/geode/logging/internal/log4j/api/FastLogger.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package org.apache.geode.logging.internal.log4j.api;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.message.MessageFactory;
import org.apache.logging.log4j.spi.ExtendedLogger;
import org.apache.logging.log4j.spi.ExtendedLoggerWrapper;
import org.apache.logging.log4j.status.StatusLogger;

import org.apache.geode.annotations.internal.MakeNotStatic;

/**
 * Overrides is-enabled checks for log levels below INFO to avoid performance penalties when the log
 * level is INFO or above. If delegating is true then it will always delegate to
 * ExtendedLoggerWrapper for is-enabled checks.
 *
 */
public class FastLogger extends ExtendedLoggerWrapper {
  private static final long serialVersionUID = 7084130827962463327L;

  @MakeNotStatic
  private static volatile boolean delegating = true;

  public FastLogger(final Logger logger) {
    this((ExtendedLogger) logger, logger.getName(), logger.getMessageFactory());
  }

  public FastLogger(final ExtendedLogger logger, final String name,
      final MessageFactory messageFactory) {
    super(logger, name, messageFactory);
  }

  public static void setDelegating(final boolean newValue) {
    StatusLogger.getLogger().debug("Setting delegating to {}", newValue);
    delegating = newValue;
  }

  @Override
  public boolean isDebugEnabled() {
    return delegating && super.isDebugEnabled();
  }

  @Override
  public boolean isDebugEnabled(final Marker marker) {
    return delegating && super.isDebugEnabled(marker);
  }

  @Override
  public boolean isTraceEnabled() {
    return delegating && super.isTraceEnabled();
  }

  @Override
  public boolean isTraceEnabled(final Marker marker) {
    return delegating && super.isTraceEnabled(marker);
  }

  public boolean isDelegating() {
    return delegating;
  }

  public ExtendedLogger getExtendedLogger() {
    return super.logger;
  }
}