hadoop RegistryInternalConstants 源码
haddop RegistryInternalConstants 代码
文件路径：/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/client/impl/zk/RegistryInternalConstants.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.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";
}
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