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https://issues.apache.org/jira/browse/HDDS-2233?focusedWorklogId=324135&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-324135
]
ASF GitHub Bot logged work on HDDS-2233:
----------------------------------------
Author: ASF GitHub Bot
Created on: 07/Oct/19 03:41
Start Date: 07/Oct/19 03:41
Worklog Time Spent: 10m
Work Description: bshashikant commented on pull request #1596: HDDS-2233
- Remove ByteStringHelper and refactor the code to the place where it used
URL: https://github.com/apache/hadoop/pull/1596#discussion_r331837192
##########
File path:
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/ByteStringConversion.java
##########
@@ -0,0 +1,62 @@
+/*
+ * 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.hdds.scm;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.ozone.OzoneConfigKeys;
+import org.apache.ratis.thirdparty.com.google.protobuf.ByteString;
+import org.apache.ratis.thirdparty.com.google.protobuf.UnsafeByteOperations;
+
+import java.nio.ByteBuffer;
+import java.util.function.Function;
+
+/**
+ * Helper class to create a conversion function from ByteBuffer to ByteString
+ * based on the property
+ * {@link OzoneConfigKeys#OZONE_UNSAFEBYTEOPERATIONS_ENABLED} in the
+ * Ozone configuration.
+ */
+public final class ByteStringConversion {
+ private ByteStringConversion(){} // no instantiation.
+
+ /**
+ * Creates the conversion function to be used to convert ByteBuffers to
+ * ByteString instances to be used in protobuf messages.
+ *
+ * @param config the Ozone configuration
+ * @return the conversion function defined by
+ * {@link OzoneConfigKeys#OZONE_UNSAFEBYTEOPERATIONS_ENABLED}
+ * @see <pre>ByteBuffer</pre>
+ */
+ public static Function<ByteBuffer, ByteString> createByteBufferConversion(
+ Configuration config){
+ boolean unsafeEnabled =
+ config!=null && config.getBoolean(
+ OzoneConfigKeys.OZONE_UNSAFEBYTEOPERATIONS_ENABLED,
+ OzoneConfigKeys.OZONE_UNSAFEBYTEOPERATIONS_ENABLED_DEFAULT);
+ if (unsafeEnabled) {
+ return buffer -> UnsafeByteOperations.unsafeWrap(buffer);
+ } else {
+ return buffer -> {
+ ByteString retval = ByteString.copyFrom(buffer);
+ buffer.flip();
Review comment:
Buffer.flip() will be required to reset the pos to 0, as ByteString.Copy
advances the position to the data length,
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Issue Time Tracking
-------------------
Worklog Id: (was: 324135)
Time Spent: 1h 10m (was: 1h)
> Remove ByteStringHelper and refactor the code to the place where it used
> ------------------------------------------------------------------------
>
> Key: HDDS-2233
> URL: https://issues.apache.org/jira/browse/HDDS-2233
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Reporter: Istvan Fajth
> Priority: Critical
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> See HDDS-2203 where there is a race condition reported by me.
> Later in the discussion we agreed that it is better to refactor the code and
> remove the class completely for now, and that would also resolve the race
> condition.
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