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Multi-get impl and formatting

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This commit is contained in:
Ankit Gupta
2014-04-25 13:57:20 -07:00
parent 042221ba32
commit e96e71becf
6 changed files with 216 additions and 2 deletions
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62
java/org/rocksdb/RocksDB.java
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@@ -5,6 +5,9 @@
package org.rocksdb;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import java.io.Closeable;
import java.io.IOException;
@@ -142,6 +145,7 @@ public class RocksDB {
* returned if the specified key is not found.
*
* @param key the key retrieve the value.
* @param opt Read options.
* @return a byte array storing the value associated with the input key if
* any. null if it does not find the specified key.
*
@@ -150,6 +154,60 @@ public class RocksDB {
public byte[] get(ReadOptions opt, byte[] key) throws RocksDBException {
return get(nativeHandle_, opt.nativeHandle_, key, key.length);
}
/**
* Returns a map of keys for which values were found in DB.
*
* @param keys List of keys for which values need to be retrieved.
* @return Map where key of map is the key passed by user and value for map
* entry is the corresponding value in DB.
*
* @see RocksDBException
*/
public Map<byte[], byte[]> multiGet(List<byte[]> keys)
throws RocksDBException {
List<byte[]> values = multiGet(
nativeHandle_, keys, keys.size());
Map<byte[], byte[]> keyValueMap = new HashMap<byte[], byte[]>();
for(int i = 0; i < values.size(); i++) {
if(values.get(i) == null) {
continue;
}
keyValueMap.put(keys.get(i), values.get(i));
}
return keyValueMap;
}
/**
* Returns a map of keys for which values were found in DB.
*
* @param List of keys for which values need to be retrieved.
* @param opt Read options.
* @return Map where key of map is the key passed by user and value for map
* entry is the corresponding value in DB.
*
* @see RocksDBException
*/
public Map<byte[], byte[]> multiGet(ReadOptions opt, List<byte[]> keys)
throws RocksDBException {
List<byte[]> values = multiGet(
nativeHandle_, opt.nativeHandle_, keys, keys.size());
Map<byte[], byte[]> keyValueMap = new HashMap<byte[], byte[]>();
for(int i = 0; i < values.size(); i++) {
if(values.get(i) == null) {
continue;
}
keyValueMap.put(keys.get(i), values.get(i));
}
return keyValueMap;
}
/**
* Remove the database entry (if any) for "key". Returns OK on
@@ -213,6 +271,10 @@ public class RocksDB {
protected native int get(
long handle, long readOptHandle, byte[] key, int keyLen,
byte[] value, int valueLen) throws RocksDBException;
protected native List<byte[]> multiGet(
long dbHandle, List<byte[]> keys, int keysCount);
protected native List<byte[]> multiGet(
long dbHandle, long rOptHandle, List<byte[]> keys, int keysCount);
protected native byte[] get(
long handle, byte[] key, int keyLen) throws RocksDBException;
protected native byte[] get(