org.apache.hadoop.registry.client.impl.zk.RegistryInternalConstants.java Source code

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Here is the source code for org.apache.hadoop.registry.client.impl.zk.RegistryInternalConstants.java

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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.hadoop.registry.client.impl.zk;

import org.apache.zookeeper.ZooDefs;

/**
 * Internal constants for the registry.
 *
 * These are the things which aren't visible to users.
 *
 */
public interface RegistryInternalConstants {

    /**
     * Pattern of a single entry in the registry path. : {@value}.
     * <p>
     * This is what constitutes a valid hostname according to current RFCs.
     * Alphanumeric first two and last one digit, alphanumeric
     * and hyphens allowed in between.
     * <p>
     * No upper limit is placed on the size of an entry.
     */
    String VALID_PATH_ENTRY_PATTERN = "([a-z0-9]|[a-z0-9][a-z0-9\\-]*[a-z0-9])";

    /**
     * Permissions for readers: {@value}.
     */
    int PERMISSIONS_REGISTRY_READERS = ZooDefs.Perms.READ;

    /**
     * Permissions for system services: {@value}
     */
    int PERMISSIONS_REGISTRY_SYSTEM_SERVICES = ZooDefs.Perms.ALL;

    /**
     * Permissions for a user's root entry: {@value}.
     * All except the admin permissions (ACL access) on a node
     */
    int PERMISSIONS_REGISTRY_USER_ROOT = ZooDefs.Perms.READ | ZooDefs.Perms.WRITE | ZooDefs.Perms.CREATE
            | ZooDefs.Perms.DELETE;

    /**
     * Name of the SASL auth provider which has to be added to ZK server to enable
     * sasl: auth patterns: {@value}.
     *
     * Without this callers can connect via SASL, but
     * they can't use it in ACLs
     */
    String SASLAUTHENTICATION_PROVIDER = "org.apache.zookeeper.server.auth.SASLAuthenticationProvider";

    /**
     * String to use as the prefix when declaring a new auth provider: {@value}.
     */
    String ZOOKEEPER_AUTH_PROVIDER = "zookeeper.authProvider";

    /**
     * This the Hadoop environment variable which propagates the identity
     * of a user in an insecure cluster
     */
    String HADOOP_USER_NAME = "HADOOP_USER_NAME";
}