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Apache Solr (module: core)

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/*
 * 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.solr.servlet;

import java.lang.invoke.MethodHandles;
import org.slf4j.LoggerFactory;

final class CheckLoggingConfiguration {

  static void check() {
    try {
      LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
    } catch (NoClassDefFoundError e) {
      throw new NoClassDefFoundError(
          "Failed to initialize Apache Solr: "
              + "Could not find necessary SLF4j logging jars. If using Jetty, the SLF4j logging jars need to go in "
              + "the jetty lib/ext directory. For other containers, the corresponding directory should be used. "
              + "For more information, see: https://cwiki.apache.org/confluence/display/solr/SolrLogging#SolrLogging-UsingtheexampleloggingsetupincontainersotherthanJetty");
    }
  }

  private CheckLoggingConfiguration() {}
}