content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.cli;
  
  import java.io.File;
  import java.util.Map;
  import java.util.StringTokenizer;
  
  /**
   * Validates the Java native libs defined in the system property.
   * */
  @ApplicableUfsType(ApplicableUfsType.Type.ALL)
  public class NativeLibValidationTask extends AbstractValidationTask {
    public static final String NATIVE_LIB_PATH = "java.library.path";
    public static final String NATIVE_LIB_PATH_SEPARATOR = ":";
  
    /**
     * Creates a new instance of {@link NativeLibValidationTask}
     * for validating Hadoop native lib path.
     */
    public NativeLibValidationTask() {}
  
    @Override
    public String getName() {
      return "ValidateJavaNativeLibPaths";
    }
  
    private ValidationTaskResult accessNativeLib() {
      String nativeLibPath = System.getProperty(NATIVE_LIB_PATH);
      StringTokenizer parser = new StringTokenizer(nativeLibPath, NATIVE_LIB_PATH_SEPARATOR);
      ValidationUtils.State state = ValidationUtils.State.OK;
      StringBuilder msg = new StringBuilder();
      msg.append(String.format("java.library.path=%s. ", nativeLibPath));
      StringBuilder advice = new StringBuilder();
      while (parser.hasMoreTokens()) {
        String path = parser.nextToken();
        File f = new File(path);
        if (!f.exists()) {
          state = ValidationUtils.State.WARNING;
          msg.append(String.format("Java native lib not found at %s.%n", path));
          advice.append(String.format("Please check your path %s.%n", path));
        }
      }
      return new ValidationTaskResult(state, getName(), msg.toString(), advice.toString());
    }
  
    @Override
    public ValidationTaskResult validateImpl(Map<String, String> optionMap)
            throws InterruptedException {
      return accessNativeLib();
    }
  }
  