/**
 * Copyright 2015 Palantir Technologies
 *
 * Licensed under the BSD-3 License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://opensource.org/licenses/BSD-3-Clause
 *
 * 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 com.palantir.atlasdb.rocksdb;

import java.io.File;
import java.util.Map;

import org.immutables.value.Value;

import com.fasterxml.jackson.annotation.JsonTypeName;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.google.common.base.Preconditions;
import com.palantir.atlasdb.keyvalue.rocksdb.impl.ImmutableWriteOpts;
import com.palantir.atlasdb.keyvalue.rocksdb.impl.WriteOpts;
import com.palantir.atlasdb.spi.KeyValueServiceConfig;

@JsonDeserialize(as = ImmutableRocksDbKeyValueServiceConfig.class)
@JsonSerialize(as = ImmutableRocksDbKeyValueServiceConfig.class)
@JsonTypeName(RocksDbKeyValueServiceConfig.TYPE)
@Value.Immutable
public abstract class RocksDbKeyValueServiceConfig implements KeyValueServiceConfig {

    public static final String TYPE = "rocksdb";

    public abstract File dataDir();

    public abstract Map<String, String> dbOptions();
    public abstract Map<String, String> cfOptions();

    @Value.Default
    public WriteOpts writeOptions() {
        return ImmutableWriteOpts.builder().build();
    }

    @Value.Default
    public String nativeLibTmpDir() {
        return "";
    }

    @Value.Check
    protected final void check() {
        Preconditions.checkArgument(dataDir().exists() || dataDir().mkdirs(),
                "dataDir '%s' does not exist and cannot be created.", dataDir());

        // Doing this here is not really ideal, but we need to do this very
        // early in the process to prevent the default loading of the libraries
        // to java.io.tmpdir that occurs as soon as any rocksdb classes are loaded.
        if (!nativeLibTmpDir().isEmpty()) {
            RocksDbNativeLibraryLoader.load(nativeLibTmpDir());
        }
    }

    @Override
    public final String type() {
        return TYPE;
    }

}

@@ -877,32 +877,72 @@
 .JsonSerialize;%0A
+import com.google.common.base.Optional;%0A
 import com.googl
@@ -1761,40 +1761,40 @@
     
-@Value.Default%0A    public 
+public abstract Optional%3C
 String
+%3E
  nat
@@ -1811,35 +1811,9 @@
 ir()
- %7B%0A        return %22%22;%0A    %7D
+;
 %0A%0A  
@@ -2279,9 +2279,8 @@
 if (
-!
 nati
@@ -2299,13 +2299,15 @@
 ).is
-Empty
+Present
 ()) 
@@ -2369,16 +2369,22 @@
 TmpDir()
+.get()
 );%0A     
@@ -2463,17 +2463,16 @@
 n TYPE;%0A
+
     %7D%0A
-%0A
 %7D%0A

use optional instead of ""