geode-core/src/main/java/org/apache/geode/admin/internal/ManagedEntityControllerFactory.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.admin.internal;

import org.apache.logging.log4j.Logger;

import org.apache.geode.admin.AdminDistributedSystem;
import org.apache.geode.admin.ManagedEntity;
import org.apache.geode.internal.ClassPathLoader;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LogMarker;

/**
 * Creates ManagedEntityController for administration (starting, stopping, etc.) of GemFire
 * {@link ManagedEntity}s.
 *
 */
public class ManagedEntityControllerFactory {

  private static final Logger logger = LogService.getLogger();

  private static final String ENABLED_MANAGED_ENTITY_CONTROLLER_CLASS_NAME =
      "org.apache.geode.admin.internal.EnabledManagedEntityController";

  static ManagedEntityController createManagedEntityController(
      final AdminDistributedSystem system) {
    if (isEnabledManagedEntityController()) {
      logger.info(LogMarker.CONFIG_MARKER,
          "Local and remote OS command invocations are enabled for the Admin API.");
      return createEnabledManagedEntityController(system);
    } else {
      logger.info(LogMarker.CONFIG_MARKER,
          "Local and remote OS command invocations are disabled for the Admin API.");
      return new DisabledManagedEntityController();
    }
  }

  public static boolean isEnabledManagedEntityController() {
    try {
      ClassPathLoader.getLatest().forName(ENABLED_MANAGED_ENTITY_CONTROLLER_CLASS_NAME);
      return true;
    } catch (ClassNotFoundException e) {
      return false;
    }
  }

  private static ManagedEntityController createEnabledManagedEntityController(
      final AdminDistributedSystem system) {
    return new EnabledManagedEntityController(system);
  }
}