Environment.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed 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.kaaproject.kaa.server.common;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Arrays;
import java.util.List;

/**
 * The Class Environment provides ability to log environment state.
 */
public class Environment {

  public static final String SERVER_HOME_DIR = "server_home_dir";

  private static final String DEFAULT_SERVER_HOME_DIR = ".";


  private static final Logger LOG = LoggerFactory.getLogger(Environment.class);

  /**
   * The Constant SYSTEM_PROPERTIES.
   */
  private static final List<String> SYSTEM_PROPERTIES = Arrays.asList(
      "java.version", "java.vendor", "java.home",
      "java.class.path", "java.library.path", "java.io.tmpdir",
      "java.compiler", "os.name", "os.arch", "os.version",
      "user.name", "user.home", "user.dir", SERVER_HOME_DIR);

  /**
   * Instantiates a new environment.
   */
  private Environment() {
  }

  /**
   * Logs environment state using {@link Logger}.
   */
  public static void logState() {
    LOG.info("Kaa version: {}, commit: {}", Version.PROJECT_VERSION, Version.COMMIT_HASH);
    for (String property : SYSTEM_PROPERTIES) {
      LOG.info("{} : {}", property, System.getProperty(property, "N/A"));
    }
  }

  ;

  public static String getServerHomeDir() {
    return System.getProperty(SERVER_HOME_DIR, DEFAULT_SERVER_HOME_DIR);
  }
}