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From laurentgo <...@git.apache.org>
Subject [GitHub] drill pull request #578: DRILL-4280: Kerberos Authentication
Date Wed, 22 Feb 2017 00:57:37 GMT
Github user laurentgo commented on a diff in the pull request:

    https://github.com/apache/drill/pull/578#discussion_r101631177
  
    --- Diff: common/src/main/java/org/apache/drill/common/KerberosUtil.java ---
    @@ -0,0 +1,76 @@
    +/**
    + * 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.drill.common;
    +
    +import static com.google.common.base.Preconditions.checkNotNull;
    +import static com.google.common.base.Preconditions.checkState;
    +
    +public final class KerberosUtil {
    +  private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(KerberosUtil.class);
    +
    +  public static final String KERBEROS_SASL_NAME = "GSSAPI";
    +
    +  public static final String KERBEROS_SIMPLE_NAME = "KERBEROS";
    +
    +  public static final String HOSTNAME_PATTERN = "_HOST";
    +
    +  /**
    +   * Returns principal of format primary/instance@REALM.
    +   *
    +   * @param primary non-null primary component
    +   * @param instance non-null instance component
    +   * @param realm non-null realm component
    +   * @return principal of format primary/instance@REALM
    +   */
    +  public static String getPrincipalFromParts(final String primary, final String instance,
final String realm) {
    +    return checkNotNull(primary) + "/" +
    +        checkNotNull(instance) + "@" +
    +        checkNotNull(realm);
    +  }
    +
    +  /**
    +   * Expects principal of the format primary/instance@REALM.
    +   *
    +   * @param principal principal
    +   * @return components
    +   */
    +  public static String[] splitPrincipalIntoParts(final String principal) {
    +    final String[] components = principal.split("[/@]");
    +    checkState(components.length == 3);
    +    checkNotNull(components[0]);
    +    checkNotNull(components[1]);
    +    checkNotNull(components[2]);
    +    return components;
    +  }
    +
    +  public static String canonicalizedInstanceName(String instanceName, final String canonicalName)
{
    --- End diff --
    
    (style) for consistency, use verb present tense for methods (canonicalizeInstanceName)


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