Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14718#discussion_r76886121
--- Diff:
common/network-common/src/main/java/org/apache/spark/network/util/LevelDBProvider.java
---
@@ -0,0 +1,152 @@
+/*
+ * 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.spark.network.util;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.fusesource.leveldbjni.JniDBFactory;
+import org.fusesource.leveldbjni.internal.NativeDB;
+import org.iq80.leveldb.DB;
+import org.iq80.leveldb.Options;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * LevelDB utility class available in the network package.
+ */
+public class LevelDBProvider {
+ private static final Logger logger =
LoggerFactory.getLogger(LevelDBProvider.class);
+
+ public static DB initLevelDB(File dbFile, StoreVersion version,
ObjectMapper mapper) throws
+ IOException {
+ DB tmpDb = null;
+ if (dbFile != null) {
--- End diff --
no need to change now, but in Java at least I tend to avoid the extra level
of indentation.
```
if (someCondition) {
return null;
}
// Rest of the code
```
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