[GitHub] [hadoop] arp7 commented on a change in pull request #1316: HDDS-1973. Implement OM RenewDelegationToken request to use Cache and DoubleBuffer.

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arp7 commented on a change in pull request #1316: HDDS-1973. Implement OM RenewDelegationToken request to use Cache and DoubleBuffer.
URL: https://github.com/apache/hadoop/pull/1316#discussion_r315983569
 
 

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 File path: hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/security/OMRenewDelegationTokenRequest.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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ozone.om.request.security;
+
+import java.io.IOException;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Optional;
+import org.apache.hadoop.ozone.om.OMMetadataManager;
+import org.apache.hadoop.ozone.om.OzoneManager;
+import org.apache.hadoop.ozone.om.ratis.utils.OzoneManagerDoubleBufferHelper;
+import org.apache.hadoop.ozone.om.request.OMClientRequest;
+import org.apache.hadoop.ozone.om.response.OMClientResponse;
+import org.apache.hadoop.ozone.om.response.security.OMRenewDelegationTokenResponse;
+import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos;
+import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.OMRequest;
+import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.OMResponse;
+import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.RenewDelegationTokenResponseProto;
+import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.UpdateRenewDelegationTokenRequest;
+import org.apache.hadoop.ozone.protocolPB.OMPBHelper;
+import org.apache.hadoop.ozone.security.OzoneTokenIdentifier;
+import org.apache.hadoop.security.proto.SecurityProtos.RenewDelegationTokenRequestProto;
+import org.apache.hadoop.security.token.Token;
+import org.apache.hadoop.utils.db.cache.CacheKey;
+import org.apache.hadoop.utils.db.cache.CacheValue;
+
+/**
+ * Handle RenewDelegationToken Request.
+ */
+public class OMRenewDelegationTokenRequest extends OMClientRequest {
+
+  private static final Logger LOG =
+      LoggerFactory.getLogger(OMGetDelegationTokenRequest.class);
+
+  public OMRenewDelegationTokenRequest(OMRequest omRequest) {
+    super(omRequest);
+  }
+
+  @Override
+  public OMRequest preExecute(OzoneManager ozoneManager) throws IOException {
+    RenewDelegationTokenRequestProto renewDelegationTokenRequest =
+        getOmRequest().getRenewDelegationTokenRequest();
+
+    // Call OM to renew token
+    long renewTime = ozoneManager.renewDelegationToken(
+        OMPBHelper.convertToDelegationToken(
+            renewDelegationTokenRequest.getToken()));
+
+    RenewDelegationTokenResponseProto.Builder renewResponse =
+        RenewDelegationTokenResponseProto.newBuilder();
+
+    renewResponse.setResponse(org.apache.hadoop.security.proto.SecurityProtos
+        .RenewDelegationTokenResponseProto.newBuilder()
+        .setNewExpiryTime(renewTime));
+
+
+    // Client issues RenewDelegationToken request, when received by OM leader
+    // it will renew the token. Original RenewDelegationToken request is
+    // converted to UpdateRenewDelegationToken request with the token and renew
+    // information. This updated request will be submitted to Ratis. In this
+    // way delegation token renewd by leader, will be replicated across all
+    // OMs. With this approach, original RenewDelegationToken request from
+    // client does not need any proto changes.
+
+    // Create UpdateRenewDelegationTokenRequest with original request and
+    // expiry time.
+    OMRequest.Builder omRequest = OMRequest.newBuilder()
+        .setUserInfo(getUserInfo())
+        .setUpdatedRenewDelegationTokenRequest(
+            UpdateRenewDelegationTokenRequest.newBuilder()
+                .setRenewDelegationTokenRequest(renewDelegationTokenRequest)
+                .setRenewDelegationTokenResponse(renewResponse))
+        .setCmdType(getOmRequest().getCmdType())
 
 Review comment:
   I agree this is a bit hard to follow. I also had a long discussion with Bharat while reviewing the createDelegationToken patch. I am okay to live with for now to avoid creating yet another request class.

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