HBASE-22250 The same constants used in many places should be placed in constant classes

Signed-off-by: stack <stack@apache.org>

hbase-client/src/main/java/org/apache/hadoop/hbase/security/SecurityInfo.java

@@ -38,17 +38,17 @@ public class SecurityInfo {
   // populate info for known services
   static {
     infos.put(AdminProtos.AdminService.getDescriptor().getName(),
-        new SecurityInfo("hbase.regionserver.kerberos.principal",
+        new SecurityInfo(SecurityConstants.REGIONSERVER_KRB_PRINCIPAL,
             Kind.HBASE_AUTH_TOKEN));
     infos.put(ClientProtos.ClientService.getDescriptor().getName(),
-        new SecurityInfo("hbase.regionserver.kerberos.principal",
+        new SecurityInfo(SecurityConstants.REGIONSERVER_KRB_PRINCIPAL,
             Kind.HBASE_AUTH_TOKEN));
     infos.put(MasterService.getDescriptor().getName(),
-        new SecurityInfo("hbase.master.kerberos.principal", Kind.HBASE_AUTH_TOKEN));
+        new SecurityInfo(SecurityConstants.MASTER_KRB_PRINCIPAL, Kind.HBASE_AUTH_TOKEN));
     infos.put(RegionServerStatusProtos.RegionServerStatusService.getDescriptor().getName(),
-        new SecurityInfo("hbase.master.kerberos.principal", Kind.HBASE_AUTH_TOKEN));
+        new SecurityInfo(SecurityConstants.MASTER_KRB_PRINCIPAL, Kind.HBASE_AUTH_TOKEN));
     infos.put(MasterProtos.HbckService.getDescriptor().getName(),
-        new SecurityInfo("hbase.master.kerberos.principal", Kind.HBASE_AUTH_TOKEN));
+        new SecurityInfo(SecurityConstants.MASTER_KRB_PRINCIPAL, Kind.HBASE_AUTH_TOKEN));
     // NOTE: IF ADDING A NEW SERVICE, BE SURE TO UPDATE HBasePolicyProvider ALSO ELSE
     // new Service will not be found when all is Kerberized!!!!
   }

hbase-common/src/main/java/org/apache/hadoop/hbase/security/SecurityConstants.java

@@ -0,0 +1,40 @@
+/*
+ * 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.hbase.security;
+
+import org.apache.yetus.audience.InterfaceAudience;
+
+/**
+ * SecurityConstants holds a bunch of kerberos-related constants
+ */
+@InterfaceAudience.Private
+public final class SecurityConstants {
+
+  /**
+   * Configuration keys for programmatic JAAS configuration for secured master
+   * and regionserver interaction
+   */
+  public static final String MASTER_KRB_PRINCIPAL = "hbase.master.kerberos.principal";
+  public static final String MASTER_KRB_KEYTAB_FILE = "hbase.master.keytab.file";
+  public static final String REGIONSERVER_KRB_PRINCIPAL = "hbase.regionserver.kerberos.principal";
+  public static final String REGIONSERVER_KRB_KEYTAB_FILE = "hbase.regionserver.keytab.file";
+
+  private SecurityConstants() {
+    // Can't be instantiated with this ctor.
+  }
+}

hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestZKAndFSPermissions.java

@@ -31,6 +31,7 @@ import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.IntegrationTestingUtility;
+import org.apache.hadoop.hbase.security.SecurityConstants;
 import org.apache.hadoop.hbase.testclassification.IntegrationTests;
 import org.apache.hadoop.hbase.util.AbstractHBaseTool;
 import org.apache.hadoop.hbase.util.FSUtils;
@@ -104,7 +105,7 @@ public class IntegrationTestZKAndFSPermissions extends AbstractHBaseTool {
   @Override
   protected void processOptions(CommandLine cmd) {
     isForce = cmd.hasOption(FORCE_CHECK_ARG);
-    masterPrincipal = getShortUserName(conf.get("hbase.master.kerberos.principal"));
+    masterPrincipal = getShortUserName(conf.get(SecurityConstants.MASTER_KRB_PRINCIPAL));
     superUser = cmd.getOptionValue(SUPERUSER_ARG, conf.get("hbase.superuser"));
     masterPrincipal = cmd.getOptionValue(PRINCIPAL_ARG, masterPrincipal);
     fsPerms = cmd.getOptionValue(FS_PERMS, "700");

hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java

@@ -193,6 +193,7 @@ import org.apache.hadoop.hbase.replication.master.ReplicationHFileCleaner;
 import org.apache.hadoop.hbase.replication.master.ReplicationLogCleaner;
 import org.apache.hadoop.hbase.replication.master.ReplicationPeerConfigUpgrader;
 import org.apache.hadoop.hbase.security.AccessDeniedException;
+import org.apache.hadoop.hbase.security.SecurityConstants;
 import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.trace.TraceUtil;
 import org.apache.hadoop.hbase.util.Addressing;
@@ -693,8 +694,8 @@ public class HMaster extends HRegionServer implements MasterServices {
     try {
       super.login(user, host);
     } catch (IOException ie) {
-      user.login("hbase.master.keytab.file",
-        "hbase.master.kerberos.principal", host);
+      user.login(SecurityConstants.MASTER_KRB_KEYTAB_FILE,
+              SecurityConstants.MASTER_KRB_PRINCIPAL, host);
     }
   }
 

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java

@@ -142,6 +142,7 @@ import org.apache.hadoop.hbase.regionserver.throttle.ThroughputController;
 import org.apache.hadoop.hbase.replication.regionserver.ReplicationLoad;
 import org.apache.hadoop.hbase.replication.regionserver.ReplicationSourceInterface;
 import org.apache.hadoop.hbase.replication.regionserver.ReplicationStatus;
+import org.apache.hadoop.hbase.security.SecurityConstants;
 import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.security.UserProvider;
@@ -533,6 +534,9 @@ public class HRegionServer extends HasThread implements
   private final boolean masterless;
   static final String MASTERLESS_CONFIG_NAME = "hbase.masterless";
 
+  /**regionserver codec list **/
+  public static final String REGIONSERVER_CODEC = "hbase.regionserver.codecs";
+
   /**
    * Starts a HRegionServer at the default location
    */
@@ -729,8 +733,8 @@ public class HRegionServer extends HasThread implements
   }
 
   protected void login(UserProvider user, String host) throws IOException {
-    user.login("hbase.regionserver.keytab.file",
-      "hbase.regionserver.kerberos.principal", host);
+    user.login(SecurityConstants.REGIONSERVER_KRB_KEYTAB_FILE,
+      SecurityConstants.REGIONSERVER_KRB_PRINCIPAL, host);
   }
 
 
@@ -819,7 +823,7 @@ public class HRegionServer extends HasThread implements
    */
   private static void checkCodecs(final Configuration c) throws IOException {
     // check to see if the codec list is available:
-    String [] codecs = c.getStrings("hbase.regionserver.codecs", (String[])null);
+    String [] codecs = c.getStrings(REGIONSERVER_CODEC, (String[])null);
     if (codecs == null) return;
     for (String codec : codecs) {
       if (!CompressionTest.testCompression(codec)) {

hbase-server/src/test/java/org/apache/hadoop/hbase/security/HBaseKerberosUtils.java

@@ -40,9 +40,9 @@ import org.apache.hadoop.security.UserGroupInformation;
 public class HBaseKerberosUtils {
   private static final Logger LOG = LoggerFactory.getLogger(HBaseKerberosUtils.class);
 
-  public static final String KRB_PRINCIPAL = "hbase.regionserver.kerberos.principal";
-  public static final String MASTER_KRB_PRINCIPAL = "hbase.master.kerberos.principal";
-  public static final String KRB_KEYTAB_FILE = "hbase.regionserver.keytab.file";
+  public static final String KRB_PRINCIPAL = SecurityConstants.REGIONSERVER_KRB_PRINCIPAL;
+  public static final String MASTER_KRB_PRINCIPAL = SecurityConstants.MASTER_KRB_PRINCIPAL;
+  public static final String KRB_KEYTAB_FILE = SecurityConstants.REGIONSERVER_KRB_KEYTAB_FILE;
   public static final String CLIENT_PRINCIPAL = AuthUtil.HBASE_CLIENT_KERBEROS_PRINCIPAL;
   public static final String CLIENT_KEYTAB = AuthUtil.HBASE_CLIENT_KEYTAB_FILE;