Yueh-Hsuan Chiang
10 years ago
commit
0d3145198e
@ -0,0 +1,95 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb; |
||||
|
||||
/** |
||||
* Comparators are used by RocksDB to determine |
||||
* the ordering of keys. |
||||
* |
||||
* This class is package private, implementers |
||||
* should extend either of the public abstract classes: |
||||
* @see org.rocksdb.Comparator |
||||
* @see org.rocksdb.DirectComparator |
||||
*/ |
||||
public abstract class AbstractComparator<T extends AbstractSlice> |
||||
extends RocksObject { |
||||
|
||||
/** |
||||
* The name of the comparator. Used to check for comparator |
||||
* mismatches (i.e., a DB created with one comparator is |
||||
* accessed using a different comparator). |
||||
* |
||||
* A new name should be used whenever |
||||
* the comparator implementation changes in a way that will cause |
||||
* the relative ordering of any two keys to change. |
||||
* |
||||
* Names starting with "rocksdb." are reserved and should not be used. |
||||
* |
||||
* @return The name of this comparator implementation |
||||
*/ |
||||
public abstract String name(); |
||||
|
||||
/** |
||||
* Three-way key comparison |
||||
* |
||||
* @param a Slice access to first key |
||||
* @param b Slice access to second key |
||||
* |
||||
* @return Should return either: |
||||
* 1) < 0 if "a" < "b" |
||||
* 2) == 0 if "a" == "b" |
||||
* 3) > 0 if "a" > "b" |
||||
*/ |
||||
public abstract int compare(final T a, final T b); |
||||
|
||||
/** |
||||
* Used to reduce the space requirements |
||||
* for internal data structures like index blocks. |
||||
* |
||||
* If start < limit, you may return a new start which is a |
||||
* shorter string in [start, limit). |
||||
* |
||||
* Simple comparator implementations may return null if they |
||||
* wish to use start unchanged. i.e., an implementation of |
||||
* this method that does nothing is correct. |
||||
* |
||||
* @return a shorter start, or null |
||||
*/ |
||||
public String findShortestSeparator(final String start, final T limit) { |
||||
return null; |
||||
} |
||||
|
||||
/** |
||||
* Used to reduce the space requirements |
||||
* for internal data structures like index blocks. |
||||
* |
||||
* You may return a new short key (key1) where |
||||
* key1 >= key. |
||||
* |
||||
* Simple comparator implementations may return null if they |
||||
* wish to leave the key unchanged. i.e., an implementation of |
||||
* this method that does nothing is correct. |
||||
* |
||||
* @return a shorter key, or null |
||||
*/ |
||||
public String findShortSuccessor(final String key) { |
||||
return null; |
||||
} |
||||
|
||||
/** |
||||
* Deletes underlying C++ comparator pointer. |
||||
* |
||||
* Note that this function should be called only after all |
||||
* RocksDB instances referencing the comparator are closed. |
||||
* Otherwise an undefined behavior will occur. |
||||
*/ |
||||
@Override protected void disposeInternal() { |
||||
assert(isInitialized()); |
||||
disposeInternal(nativeHandle_); |
||||
} |
||||
|
||||
private native void disposeInternal(long handle); |
||||
} |
||||
@ -0,0 +1,167 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb; |
||||
|
||||
/** |
||||
* Slices are used by RocksDB to provide |
||||
* efficient access to keys and values. |
||||
* |
||||
* This class is package private, implementers |
||||
* should extend either of the public abstract classes: |
||||
* @see org.rocksdb.Slice |
||||
* @see org.rocksdb.DirectSlice |
||||
* |
||||
* Regards the lifecycle of Java Slices in RocksDB: |
||||
* At present when you configure a Comparator from Java, it creates an |
||||
* instance of a C++ BaseComparatorJniCallback subclass and |
||||
* passes that to RocksDB as the comparator. That subclass of |
||||
* BaseComparatorJniCallback creates the Java |
||||
* {@see org.rocksdb.AbstractSlice} subclass Objects. When you dispose |
||||
* the Java {@see org.rocksdb.AbstractComparator} subclass, it disposes the |
||||
* C++ BaseComparatorJniCallback subclass, which in turn destroys the |
||||
* Java {@see org.rocksdb.AbstractSlice} subclass Objects. |
||||
*/ |
||||
abstract class AbstractSlice<T> extends RocksObject { |
||||
|
||||
/** |
||||
* Returns the data of the slice. |
||||
* |
||||
* @return The slice data. Note, the type of access is |
||||
* determined by the subclass |
||||
* @see org.rocksdb.AbstractSlice#data0(long). |
||||
*/ |
||||
public T data() { |
||||
assert (isInitialized()); |
||||
return data0(nativeHandle_); |
||||
} |
||||
|
||||
/** |
||||
* Access to the data is provided by the |
||||
* subtype as it needs to handle the |
||||
* generic typing. |
||||
* |
||||
* @param handle The address of the underlying |
||||
* native object. |
||||
* |
||||
* @return Java typed access to the data. |
||||
*/ |
||||
protected abstract T data0(long handle); |
||||
|
||||
/** |
||||
* Return the length (in bytes) of the data. |
||||
* |
||||
* @return The length in bytes. |
||||
*/ |
||||
public int size() { |
||||
assert (isInitialized()); |
||||
return size0(nativeHandle_); |
||||
} |
||||
|
||||
/** |
||||
* Return true if the length of the |
||||
* data is zero. |
||||
* |
||||
* @return true if there is no data, false otherwise. |
||||
*/ |
||||
public boolean empty() { |
||||
assert (isInitialized()); |
||||
return empty0(nativeHandle_); |
||||
} |
||||
|
||||
/** |
||||
* Creates a string representation of the data |
||||
* |
||||
* @param hex When true, the representation |
||||
* will be encoded in hexadecimal. |
||||
* |
||||
* @return The string representation of the data. |
||||
*/ |
||||
public String toString(final boolean hex) { |
||||
assert (isInitialized()); |
||||
return toString0(nativeHandle_, hex); |
||||
} |
||||
|
||||
@Override |
||||
public String toString() { |
||||
return toString(false); |
||||
} |
||||
|
||||
/** |
||||
* Three-way key comparison |
||||
* |
||||
* @param other A slice to compare against |
||||
* |
||||
* @return Should return either: |
||||
* 1) < 0 if this < other |
||||
* 2) == 0 if this == other |
||||
* 3) > 0 if this > other |
||||
*/ |
||||
public int compare(final AbstractSlice other) { |
||||
assert (other != null); |
||||
assert (isInitialized()); |
||||
return compare0(nativeHandle_, other.nativeHandle_); |
||||
} |
||||
|
||||
/** |
||||
* If other is a slice object, then |
||||
* we defer to {@link #compare(AbstractSlice) compare} |
||||
* to check equality, otherwise we return false. |
||||
* |
||||
* @param other Object to test for equality |
||||
* |
||||
* @return true when {@code this.compare(other) == 0}, |
||||
* false otherwise. |
||||
*/ |
||||
@Override |
||||
public boolean equals(final Object other) { |
||||
if (other != null && other instanceof AbstractSlice) { |
||||
return compare((AbstractSlice)other) == 0; |
||||
} else { |
||||
return false; |
||||
} |
||||
} |
||||
|
||||
/** |
||||
* Determines whether this slice starts with |
||||
* another slice |
||||
* |
||||
* @param prefix Another slice which may of may not |
||||
* be a prefix of this slice. |
||||
* |
||||
* @return true when this slice starts with the |
||||
* {@code prefix} slice |
||||
*/ |
||||
public boolean startsWith(final AbstractSlice prefix) { |
||||
if (prefix != null) { |
||||
assert (isInitialized()); |
||||
return startsWith0(nativeHandle_, prefix.nativeHandle_); |
||||
} else { |
||||
return false; |
||||
} |
||||
} |
||||
|
||||
/** |
||||
* Deletes underlying C++ slice pointer. |
||||
* <p/> |
||||
* Note that this function should be called only after all |
||||
* RocksDB instances referencing the slice are closed. |
||||
* Otherwise an undefined behavior will occur. |
||||
*/ |
||||
@Override |
||||
protected void disposeInternal() { |
||||
assert(isInitialized()); |
||||
disposeInternal(nativeHandle_); |
||||
} |
||||
|
||||
protected native void createNewSliceFromString(String str); |
||||
private native int size0(long handle); |
||||
private native boolean empty0(long handle); |
||||
private native String toString0(long handle, boolean hex); |
||||
private native int compare0(long handle, long otherHandle); |
||||
private native boolean startsWith0(long handle, long otherHandle); |
||||
private native void disposeInternal(long handle); |
||||
|
||||
} |
||||
@ -0,0 +1,24 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb; |
||||
|
||||
/** |
||||
* Base class for comparators which will receive |
||||
* byte[] based access via org.rocksdb.Slice in their |
||||
* compare method implementation. |
||||
* |
||||
* byte[] based slices perform better when small keys |
||||
* are involved. When using larger keys consider |
||||
* using @see org.rocksdb.DirectComparator |
||||
*/ |
||||
public abstract class Comparator extends AbstractComparator<Slice> { |
||||
public Comparator(final ComparatorOptions copt) { |
||||
super(); |
||||
createNewComparator0(copt.nativeHandle_); |
||||
} |
||||
|
||||
private native void createNewComparator0(final long comparatorOptionsHandle); |
||||
} |
||||
@ -0,0 +1,57 @@ |
||||
package org.rocksdb; |
||||
|
||||
/** |
||||
* This class controls the behaviour |
||||
* of Java implementations of |
||||
* AbstractComparator |
||||
* |
||||
* Note that dispose() must be called before a ComparatorOptions |
||||
* instance becomes out-of-scope to release the allocated memory in C++. |
||||
*/ |
||||
public class ComparatorOptions extends RocksObject { |
||||
public ComparatorOptions() { |
||||
super(); |
||||
newComparatorOptions(); |
||||
} |
||||
|
||||
/** |
||||
* Use adaptive mutex, which spins in the user space before resorting |
||||
* to kernel. This could reduce context switch when the mutex is not |
||||
* heavily contended. However, if the mutex is hot, we could end up |
||||
* wasting spin time. |
||||
* Default: false |
||||
* |
||||
* @return true if adaptive mutex is used. |
||||
*/ |
||||
public boolean useAdaptiveMutex() { |
||||
assert(isInitialized()); |
||||
return useAdaptiveMutex(nativeHandle_); |
||||
} |
||||
|
||||
/** |
||||
* Use adaptive mutex, which spins in the user space before resorting |
||||
* to kernel. This could reduce context switch when the mutex is not |
||||
* heavily contended. However, if the mutex is hot, we could end up |
||||
* wasting spin time. |
||||
* Default: false |
||||
* |
||||
* @param useAdaptiveMutex true if adaptive mutex is used. |
||||
* @return the reference to the current comparator options. |
||||
*/ |
||||
public ComparatorOptions setUseAdaptiveMutex(final boolean useAdaptiveMutex) { |
||||
assert (isInitialized()); |
||||
setUseAdaptiveMutex(nativeHandle_, useAdaptiveMutex); |
||||
return this; |
||||
} |
||||
|
||||
@Override protected void disposeInternal() { |
||||
assert(isInitialized()); |
||||
disposeInternal(nativeHandle_); |
||||
} |
||||
|
||||
private native void newComparatorOptions(); |
||||
private native boolean useAdaptiveMutex(final long handle); |
||||
private native void setUseAdaptiveMutex(final long handle, |
||||
final boolean useAdaptiveMutex); |
||||
private native void disposeInternal(long handle); |
||||
} |
||||
@ -0,0 +1,24 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb; |
||||
|
||||
/** |
||||
* Base class for comparators which will receive |
||||
* ByteBuffer based access via org.rocksdb.DirectSlice |
||||
* in their compare method implementation. |
||||
* |
||||
* ByteBuffer based slices perform better when large keys |
||||
* are involved. When using smaller keys consider |
||||
* using @see org.rocksdb.Comparator |
||||
*/ |
||||
public abstract class DirectComparator extends AbstractComparator<DirectSlice> { |
||||
public DirectComparator(final ComparatorOptions copt) { |
||||
super(); |
||||
createNewDirectComparator0(copt.nativeHandle_); |
||||
} |
||||
|
||||
private native void createNewDirectComparator0(final long comparatorOptionsHandle); |
||||
} |
||||
@ -0,0 +1,113 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb; |
||||
|
||||
import java.nio.ByteBuffer; |
||||
|
||||
/** |
||||
* Base class for slices which will receive direct |
||||
* ByteBuffer based access to the underlying data. |
||||
* |
||||
* ByteBuffer backed slices typically perform better with |
||||
* larger keys and values. When using smaller keys and |
||||
* values consider using @see org.rocksdb.Slice |
||||
*/ |
||||
public class DirectSlice extends AbstractSlice<ByteBuffer> { |
||||
/** |
||||
* Called from JNI to construct a new Java DirectSlice |
||||
* without an underlying C++ object set |
||||
* at creation time. |
||||
* |
||||
* Note: You should be aware that |
||||
* {@see org.rocksdb.RocksObject#disOwnNativeHandle()} is intentionally |
||||
* called from the default DirectSlice constructor, and that it is marked as |
||||
* private. This is so that developers cannot construct their own default |
||||
* DirectSlice objects (at present). As developers cannot construct their own |
||||
* DirectSlice objects through this, they are not creating underlying C++ |
||||
* DirectSlice objects, and so there is nothing to free (dispose) from Java. |
||||
*/ |
||||
private DirectSlice() { |
||||
super(); |
||||
disOwnNativeHandle(); |
||||
} |
||||
|
||||
/** |
||||
* Constructs a slice |
||||
* where the data is taken from |
||||
* a String. |
||||
* |
||||
* @param str The string |
||||
*/ |
||||
public DirectSlice(final String str) { |
||||
super(); |
||||
createNewSliceFromString(str); |
||||
} |
||||
|
||||
/** |
||||
* Constructs a slice where the data is |
||||
* read from the provided |
||||
* ByteBuffer up to a certain length |
||||
* |
||||
* @param data The buffer containing the data |
||||
* @param length The length of the data to use for the slice |
||||
*/ |
||||
public DirectSlice(final ByteBuffer data, final int length) { |
||||
super(); |
||||
createNewDirectSlice0(data, length); |
||||
} |
||||
|
||||
/** |
||||
* Constructs a slice where the data is |
||||
* read from the provided |
||||
* ByteBuffer |
||||
* |
||||
* @param data The bugger containing the data |
||||
*/ |
||||
public DirectSlice(final ByteBuffer data) { |
||||
super(); |
||||
createNewDirectSlice1(data); |
||||
} |
||||
|
||||
/** |
||||
* Retrieves the byte at a specific offset |
||||
* from the underlying data |
||||
* |
||||
* @param offset The (zero-based) offset of the byte to retrieve |
||||
* |
||||
* @return the requested byte |
||||
*/ |
||||
public byte get(int offset) { |
||||
assert (isInitialized()); |
||||
return get0(nativeHandle_, offset); |
||||
} |
||||
|
||||
/** |
||||
* Clears the backing slice |
||||
*/ |
||||
public void clear() { |
||||
assert (isInitialized()); |
||||
clear0(nativeHandle_); |
||||
} |
||||
|
||||
/** |
||||
* Drops the specified {@code n} |
||||
* number of bytes from the start |
||||
* of the backing slice |
||||
* |
||||
* @param n The number of bytes to drop |
||||
*/ |
||||
public void removePrefix(final int n) { |
||||
assert (isInitialized()); |
||||
removePrefix0(nativeHandle_, n); |
||||
} |
||||
|
||||
private native void createNewDirectSlice0(ByteBuffer data, int length); |
||||
private native void createNewDirectSlice1(ByteBuffer data); |
||||
@Override protected final native ByteBuffer data0(long handle); |
||||
private native byte get0(long handle, int offset); |
||||
private native void clear0(long handle); |
||||
private native void removePrefix0(long handle, int length); |
||||
} |
||||
@ -0,0 +1,84 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb; |
||||
|
||||
/** |
||||
* Base class for slices which will receive |
||||
* byte[] based access to the underlying data. |
||||
* |
||||
* byte[] backed slices typically perform better with |
||||
* small keys and values. When using larger keys and |
||||
* values consider using @see org.rocksdb.DirectSlice |
||||
*/ |
||||
public class Slice extends AbstractSlice<byte[]> { |
||||
/** |
||||
* Called from JNI to construct a new Java Slice |
||||
* without an underlying C++ object set |
||||
* at creation time. |
||||
* |
||||
* Note: You should be aware that |
||||
* {@see org.rocksdb.RocksObject#disOwnNativeHandle()} is intentionally |
||||
* called from the default Slice constructor, and that it is marked as |
||||
* private. This is so that developers cannot construct their own default |
||||
* Slice objects (at present). As developers cannot construct their own |
||||
* Slice objects through this, they are not creating underlying C++ Slice |
||||
* objects, and so there is nothing to free (dispose) from Java. |
||||
*/ |
||||
private Slice() { |
||||
super(); |
||||
disOwnNativeHandle(); |
||||
} |
||||
|
||||
/** |
||||
* Constructs a slice |
||||
* where the data is taken from |
||||
* a String. |
||||
*/ |
||||
public Slice(final String str) { |
||||
super(); |
||||
createNewSliceFromString(str); |
||||
} |
||||
|
||||
/** |
||||
* Constructs a slice |
||||
* where the data is a copy of |
||||
* the byte array from a specific offset. |
||||
*/ |
||||
public Slice(final byte[] data, final int offset) { |
||||
super(); |
||||
createNewSlice0(data, offset); |
||||
} |
||||
|
||||
/** |
||||
* Constructs a slice |
||||
* where the data is a copy of |
||||
* the byte array. |
||||
*/ |
||||
public Slice(final byte[] data) { |
||||
super(); |
||||
createNewSlice1(data); |
||||
} |
||||
|
||||
/** |
||||
* Deletes underlying C++ slice pointer |
||||
* and any buffered data. |
||||
* |
||||
* <p/> |
||||
* Note that this function should be called only after all |
||||
* RocksDB instances referencing the slice are closed. |
||||
* Otherwise an undefined behavior will occur. |
||||
*/ |
||||
@Override |
||||
protected void disposeInternal() { |
||||
super.disposeInternal(); |
||||
disposeInternalBuf(nativeHandle_); |
||||
} |
||||
|
||||
@Override protected final native byte[] data0(long handle); |
||||
private native void createNewSlice0(byte[] data, int length); |
||||
private native void createNewSlice1(byte[] data); |
||||
private native void disposeInternalBuf(long handle); |
||||
} |
||||
@ -0,0 +1,166 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb.test; |
||||
|
||||
import org.rocksdb.*; |
||||
|
||||
import java.io.IOException; |
||||
import java.nio.file.*; |
||||
import java.nio.file.attribute.BasicFileAttributes; |
||||
import java.util.Random; |
||||
|
||||
import static org.rocksdb.test.Types.byteToInt; |
||||
import static org.rocksdb.test.Types.intToByte; |
||||
|
||||
/** |
||||
* Abstract tests for both Comparator and DirectComparator |
||||
*/ |
||||
public abstract class AbstractComparatorTest { |
||||
|
||||
/** |
||||
* Get a comparator which will expect Integer keys |
||||
* and determine an ascending order |
||||
* |
||||
* @return An integer ascending order key comparator |
||||
*/ |
||||
public abstract AbstractComparator getAscendingIntKeyComparator(); |
||||
|
||||
/** |
||||
* Test which stores random keys into the database |
||||
* using an @see getAscendingIntKeyComparator |
||||
* it then checks that these keys are read back in |
||||
* ascending order |
||||
* |
||||
* @param db_path A path where we can store database |
||||
* files temporarily |
||||
*/ |
||||
public void testRoundtrip(final Path db_path) throws IOException { |
||||
|
||||
Options opt = null; |
||||
RocksDB db = null; |
||||
|
||||
try { |
||||
opt = new Options(); |
||||
opt.setCreateIfMissing(true); |
||||
opt.setComparator(getAscendingIntKeyComparator()); |
||||
|
||||
// store 10,000 random integer keys
|
||||
final int ITERATIONS = 10000; |
||||
|
||||
db = RocksDB.open(opt, db_path.toString()); |
||||
final Random random = new Random(); |
||||
for (int i = 0; i < ITERATIONS; i++) { |
||||
final byte key[] = intToByte(random.nextInt()); |
||||
if (i > 0 && db.get(key) != null) { // does key already exist (avoid duplicates)
|
||||
i--; // generate a different key
|
||||
} else { |
||||
db.put(key, "value".getBytes()); |
||||
} |
||||
} |
||||
db.close(); |
||||
|
||||
|
||||
// re-open db and read from start to end
|
||||
// integer keys should be in ascending
|
||||
// order as defined by SimpleIntComparator
|
||||
db = RocksDB.open(opt, db_path.toString()); |
||||
final RocksIterator it = db.newIterator(); |
||||
it.seekToFirst(); |
||||
int lastKey = Integer.MIN_VALUE; |
||||
int count = 0; |
||||
for (it.seekToFirst(); it.isValid(); it.next()) { |
||||
final int thisKey = byteToInt(it.key()); |
||||
assert(thisKey > lastKey); |
||||
lastKey = thisKey; |
||||
count++; |
||||
} |
||||
db.close(); |
||||
|
||||
assert(count == ITERATIONS); |
||||
|
||||
} catch (final RocksDBException e) { |
||||
System.err.format("[ERROR]: %s%n", e); |
||||
e.printStackTrace(); |
||||
} finally { |
||||
if (db != null) { |
||||
db.close(); |
||||
} |
||||
|
||||
if (opt != null) { |
||||
opt.dispose(); |
||||
} |
||||
|
||||
removeDb(db_path); // cleanup after ourselves!
|
||||
} |
||||
} |
||||
|
||||
/** |
||||
* Compares integer keys |
||||
* so that they are in ascending order |
||||
* |
||||
* @param a 4-bytes representing an integer key |
||||
* @param b 4-bytes representing an integer key |
||||
* |
||||
* @return negative if a < b, 0 if a == b, positive otherwise |
||||
*/ |
||||
protected final int compareIntKeys(final byte[] a, final byte[] b) { |
||||
|
||||
final int iA = byteToInt(a); |
||||
final int iB = byteToInt(b); |
||||
|
||||
// protect against int key calculation overflow
|
||||
final double diff = (double)iA - iB; |
||||
final int result; |
||||
if (diff < Integer.MIN_VALUE) { |
||||
result = Integer.MIN_VALUE; |
||||
} else if(diff > Integer.MAX_VALUE) { |
||||
result = Integer.MAX_VALUE; |
||||
} else { |
||||
result = (int)diff; |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
/** |
||||
* Utility method for deleting database files |
||||
* |
||||
* @param db_path The path to the database to remove |
||||
* from the filesystem |
||||
*/ |
||||
private static void removeDb(final Path db_path) throws IOException { |
||||
Files.walkFileTree(db_path, new SimpleFileVisitor<Path>() { |
||||
@Override |
||||
public FileVisitResult visitFile(final Path file, final BasicFileAttributes attrs) |
||||
throws IOException { |
||||
Files.delete(file); |
||||
return FileVisitResult.CONTINUE; |
||||
} |
||||
|
||||
@Override |
||||
public FileVisitResult visitFileFailed(final Path file, IOException exc) |
||||
throws IOException { |
||||
// try to delete the file anyway, even if its attributes
|
||||
// could not be read, since delete-only access is
|
||||
// theoretically possible
|
||||
Files.delete(file); |
||||
return FileVisitResult.CONTINUE; |
||||
} |
||||
|
||||
@Override |
||||
public FileVisitResult postVisitDirectory(final Path dir, IOException exc) |
||||
throws IOException { |
||||
if (exc == null) { |
||||
Files.delete(dir); |
||||
return FileVisitResult.CONTINUE; |
||||
} else { |
||||
// directory iteration failed; propagate exception
|
||||
throw exc; |
||||
} |
||||
} |
||||
}); |
||||
} |
||||
} |
||||
@ -0,0 +1,34 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb.test; |
||||
|
||||
import org.rocksdb.ComparatorOptions; |
||||
import org.rocksdb.RocksDB; |
||||
|
||||
import java.util.Random; |
||||
|
||||
public class ComparatorOptionsTest { |
||||
|
||||
static { |
||||
RocksDB.loadLibrary(); |
||||
} |
||||
|
||||
public static void main(String[] args) { |
||||
final ComparatorOptions copt = new ComparatorOptions(); |
||||
Random rand = new Random(); |
||||
|
||||
{ // UseAdaptiveMutex test
|
||||
copt.setUseAdaptiveMutex(true); |
||||
assert(copt.useAdaptiveMutex() == true); |
||||
|
||||
copt.setUseAdaptiveMutex(false); |
||||
assert(copt.useAdaptiveMutex() == false); |
||||
} |
||||
|
||||
copt.dispose(); |
||||
System.out.println("Passed ComparatorOptionsTest"); |
||||
} |
||||
} |
||||
@ -0,0 +1,45 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb.test; |
||||
|
||||
import org.rocksdb.*; |
||||
|
||||
import java.io.IOException; |
||||
import java.nio.file.FileSystems; |
||||
|
||||
public class ComparatorTest { |
||||
private static final String db_path = "/tmp/comparator_db"; |
||||
|
||||
static { |
||||
RocksDB.loadLibrary(); |
||||
} |
||||
|
||||
public static void main(String[] args) throws IOException { |
||||
|
||||
final AbstractComparatorTest comparatorTest = new AbstractComparatorTest() { |
||||
@Override |
||||
public AbstractComparator getAscendingIntKeyComparator() { |
||||
return new Comparator(new ComparatorOptions()) { |
||||
|
||||
@Override |
||||
public String name() { |
||||
return "test.AscendingIntKeyComparator"; |
||||
} |
||||
|
||||
@Override |
||||
public int compare(final Slice a, final Slice b) { |
||||
return compareIntKeys(a.data(), b.data()); |
||||
} |
||||
}; |
||||
} |
||||
}; |
||||
|
||||
// test the round-tripability of keys written and read with the Comparator
|
||||
comparatorTest.testRoundtrip(FileSystems.getDefault().getPath(db_path)); |
||||
|
||||
System.out.println("Passed ComparatorTest"); |
||||
} |
||||
} |
||||
@ -0,0 +1,48 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb.test; |
||||
|
||||
import org.rocksdb.*; |
||||
|
||||
import java.io.IOException; |
||||
import java.nio.file.FileSystems; |
||||
|
||||
public class DirectComparatorTest { |
||||
private static final String db_path = "/tmp/direct_comparator_db"; |
||||
|
||||
static { |
||||
RocksDB.loadLibrary(); |
||||
} |
||||
|
||||
public static void main(String[] args) throws IOException { |
||||
|
||||
final AbstractComparatorTest comparatorTest = new AbstractComparatorTest() { |
||||
@Override |
||||
public AbstractComparator getAscendingIntKeyComparator() { |
||||
return new DirectComparator(new ComparatorOptions()) { |
||||
|
||||
@Override |
||||
public String name() { |
||||
return "test.AscendingIntKeyDirectComparator"; |
||||
} |
||||
|
||||
@Override |
||||
public int compare(final DirectSlice a, final DirectSlice b) { |
||||
final byte ax[] = new byte[4], bx[] = new byte[4]; |
||||
a.data().get(ax); |
||||
b.data().get(bx); |
||||
return compareIntKeys(ax, bx); |
||||
} |
||||
}; |
||||
} |
||||
}; |
||||
|
||||
// test the round-tripability of keys written and read with the DirectComparator
|
||||
comparatorTest.testRoundtrip(FileSystems.getDefault().getPath(db_path)); |
||||
|
||||
System.out.println("Passed DirectComparatorTest"); |
||||
} |
||||
} |
||||
@ -0,0 +1,43 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
|
||||
package org.rocksdb.test; |
||||
|
||||
/** |
||||
* Simple type conversion methods |
||||
* for use in tests |
||||
*/ |
||||
public class Types { |
||||
|
||||
/** |
||||
* Convert first 4 bytes of a byte array to an int |
||||
* |
||||
* @param data The byte array |
||||
* |
||||
* @return An integer |
||||
*/ |
||||
public static int byteToInt(final byte data[]) { |
||||
return (data[0] & 0xff) | |
||||
((data[1] & 0xff) << 8) | |
||||
((data[2] & 0xff) << 16) | |
||||
((data[3] & 0xff) << 24); |
||||
} |
||||
|
||||
/** |
||||
* Convert an int to 4 bytes |
||||
* |
||||
* @param v The int |
||||
* |
||||
* @return A byte array containing 4 bytes |
||||
*/ |
||||
public static byte[] intToByte(final int v) { |
||||
return new byte[] { |
||||
(byte)((v >>> 0) & 0xff), |
||||
(byte)((v >>> 8) & 0xff), |
||||
(byte)((v >>> 16) & 0xff), |
||||
(byte)((v >>> 24) & 0xff) |
||||
}; |
||||
} |
||||
} |
||||
@ -0,0 +1,66 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
//
|
||||
// This file implements the "bridge" between Java and C++ for
|
||||
// rocksdb::Comparator.
|
||||
|
||||
#include <stdio.h> |
||||
#include <stdlib.h> |
||||
#include <jni.h> |
||||
#include <string> |
||||
#include <functional> |
||||
|
||||
#include "include/org_rocksdb_AbstractComparator.h" |
||||
#include "include/org_rocksdb_Comparator.h" |
||||
#include "include/org_rocksdb_DirectComparator.h" |
||||
#include "rocksjni/comparatorjnicallback.h" |
||||
#include "rocksjni/portal.h" |
||||
|
||||
// <editor-fold desc="org.rocksdb.AbstractComparator>
|
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractComparator |
||||
* Method: disposeInternal |
||||
* Signature: (J)V |
||||
*/ |
||||
void Java_org_rocksdb_AbstractComparator_disposeInternal( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
delete reinterpret_cast<rocksdb::BaseComparatorJniCallback*>(handle); |
||||
} |
||||
// </editor-fold>
|
||||
|
||||
// <editor-fold desc="org.rocksdb.Comparator>
|
||||
|
||||
/*
|
||||
* Class: org_rocksdb_Comparator |
||||
* Method: createNewComparator0 |
||||
* Signature: ()V |
||||
*/ |
||||
void Java_org_rocksdb_Comparator_createNewComparator0( |
||||
JNIEnv* env, jobject jobj, jlong copt_handle) { |
||||
const rocksdb::ComparatorJniCallbackOptions* copt = |
||||
reinterpret_cast<rocksdb::ComparatorJniCallbackOptions*>(copt_handle); |
||||
const rocksdb::ComparatorJniCallback* c = |
||||
new rocksdb::ComparatorJniCallback(env, jobj, copt); |
||||
rocksdb::AbstractComparatorJni::setHandle(env, jobj, c); |
||||
} |
||||
// </editor-fold>
|
||||
|
||||
// <editor-fold desc="org.rocksdb.DirectComparator>
|
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectComparator |
||||
* Method: createNewDirectComparator0 |
||||
* Signature: ()V |
||||
*/ |
||||
void Java_org_rocksdb_DirectComparator_createNewDirectComparator0( |
||||
JNIEnv* env, jobject jobj, jlong copt_handle) { |
||||
const rocksdb::ComparatorJniCallbackOptions* copt = |
||||
reinterpret_cast<rocksdb::ComparatorJniCallbackOptions*>(copt_handle); |
||||
const rocksdb::DirectComparatorJniCallback* c = |
||||
new rocksdb::DirectComparatorJniCallback(env, jobj, copt); |
||||
rocksdb::AbstractComparatorJni::setHandle(env, jobj, c); |
||||
} |
||||
// </editor-fold>
|
||||
@ -0,0 +1,176 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
//
|
||||
// This file implements the callback "bridge" between Java and C++ for
|
||||
// rocksdb::Comparator.
|
||||
|
||||
#include "rocksjni/comparatorjnicallback.h" |
||||
#include "rocksjni/portal.h" |
||||
|
||||
namespace rocksdb { |
||||
BaseComparatorJniCallback::BaseComparatorJniCallback( |
||||
JNIEnv* env, jobject jComparator, |
||||
const ComparatorJniCallbackOptions* copt) |
||||
: mtx_compare(new port::Mutex(copt->use_adaptive_mutex)), |
||||
mtx_findShortestSeparator(new port::Mutex(copt->use_adaptive_mutex)) { |
||||
|
||||
// Note: Comparator methods may be accessed by multiple threads,
|
||||
// so we ref the jvm not the env
|
||||
const jint rs = env->GetJavaVM(&m_jvm); |
||||
assert(rs == JNI_OK); |
||||
|
||||
// Note: we want to access the Java Comparator instance
|
||||
// across multiple method calls, so we create a global ref
|
||||
m_jComparator = env->NewGlobalRef(jComparator); |
||||
|
||||
// Note: The name of a Comparator will not change during it's lifetime,
|
||||
// so we cache it in a global var
|
||||
jmethodID jNameMethodId = AbstractComparatorJni::getNameMethodId(env); |
||||
jstring jsName = (jstring)env->CallObjectMethod(m_jComparator, jNameMethodId); |
||||
m_name = JniUtil::copyString(env, jsName); // also releases jsName
|
||||
|
||||
m_jCompareMethodId = AbstractComparatorJni::getCompareMethodId(env); |
||||
m_jFindShortestSeparatorMethodId = |
||||
AbstractComparatorJni::getFindShortestSeparatorMethodId(env); |
||||
m_jFindShortSuccessorMethodId = |
||||
AbstractComparatorJni::getFindShortSuccessorMethodId(env); |
||||
} |
||||
|
||||
/**
|
||||
* Attach/Get a JNIEnv for the current native thread |
||||
*/ |
||||
JNIEnv* BaseComparatorJniCallback::getJniEnv() const { |
||||
JNIEnv *env; |
||||
jint rs = m_jvm->AttachCurrentThread(reinterpret_cast<void **>(&env), NULL); |
||||
assert(rs == JNI_OK); |
||||
return env; |
||||
} |
||||
|
||||
const char* BaseComparatorJniCallback::Name() const { |
||||
return m_name.c_str(); |
||||
} |
||||
|
||||
int BaseComparatorJniCallback::Compare(const Slice& a, const Slice& b) const { |
||||
JNIEnv* m_env = getJniEnv(); |
||||
|
||||
// TODO(adamretter): slice objects can potentially be cached using thread
|
||||
// local variables to avoid locking. Could make this configurable depending on
|
||||
// performance.
|
||||
mtx_compare->Lock(); |
||||
|
||||
AbstractSliceJni::setHandle(m_env, m_jSliceA, &a); |
||||
AbstractSliceJni::setHandle(m_env, m_jSliceB, &b); |
||||
jint result = |
||||
m_env->CallIntMethod(m_jComparator, m_jCompareMethodId, m_jSliceA, |
||||
m_jSliceB); |
||||
|
||||
mtx_compare->Unlock(); |
||||
|
||||
m_jvm->DetachCurrentThread(); |
||||
|
||||
return result; |
||||
} |
||||
|
||||
void BaseComparatorJniCallback::FindShortestSeparator( |
||||
std::string* start, const Slice& limit) const { |
||||
if (start == nullptr) { |
||||
return; |
||||
} |
||||
|
||||
JNIEnv* m_env = getJniEnv(); |
||||
|
||||
const char* startUtf = start->c_str(); |
||||
jstring jsStart = m_env->NewStringUTF(startUtf); |
||||
|
||||
// TODO(adamretter): slice object can potentially be cached using thread local
|
||||
// variable to avoid locking. Could make this configurable depending on
|
||||
// performance.
|
||||
mtx_findShortestSeparator->Lock(); |
||||
|
||||
AbstractSliceJni::setHandle(m_env, m_jSliceLimit, &limit); |
||||
jstring jsResultStart = |
||||
(jstring)m_env->CallObjectMethod(m_jComparator, |
||||
m_jFindShortestSeparatorMethodId, jsStart, m_jSliceLimit); |
||||
|
||||
mtx_findShortestSeparator->Unlock(); |
||||
|
||||
m_env->DeleteLocalRef(jsStart); |
||||
|
||||
if (jsResultStart != nullptr) { |
||||
// update start with result
|
||||
*start = |
||||
JniUtil::copyString(m_env, jsResultStart); // also releases jsResultStart
|
||||
} |
||||
|
||||
m_jvm->DetachCurrentThread(); |
||||
} |
||||
|
||||
void BaseComparatorJniCallback::FindShortSuccessor(std::string* key) const { |
||||
if (key == nullptr) { |
||||
return; |
||||
} |
||||
|
||||
JNIEnv* m_env = getJniEnv(); |
||||
|
||||
const char* keyUtf = key->c_str(); |
||||
jstring jsKey = m_env->NewStringUTF(keyUtf); |
||||
|
||||
jstring jsResultKey = |
||||
(jstring)m_env->CallObjectMethod(m_jComparator, |
||||
m_jFindShortSuccessorMethodId, jsKey); |
||||
|
||||
m_env->DeleteLocalRef(jsKey); |
||||
|
||||
if (jsResultKey != nullptr) { |
||||
// updates key with result, also releases jsResultKey.
|
||||
*key = JniUtil::copyString(m_env, jsResultKey); |
||||
} |
||||
|
||||
m_jvm->DetachCurrentThread(); |
||||
} |
||||
|
||||
BaseComparatorJniCallback::~BaseComparatorJniCallback() { |
||||
JNIEnv* m_env = getJniEnv(); |
||||
|
||||
m_env->DeleteGlobalRef(m_jComparator); |
||||
|
||||
// Note: do not need to explicitly detach, as this function is effectively
|
||||
// called from the Java class's disposeInternal method, and so already
|
||||
// has an attached thread, getJniEnv above is just a no-op Attach to get
|
||||
// the env jvm->DetachCurrentThread();
|
||||
} |
||||
|
||||
ComparatorJniCallback::ComparatorJniCallback( |
||||
JNIEnv* env, jobject jComparator, |
||||
const ComparatorJniCallbackOptions* copt) : |
||||
BaseComparatorJniCallback(env, jComparator, copt) { |
||||
m_jSliceA = env->NewGlobalRef(SliceJni::construct0(env)); |
||||
m_jSliceB = env->NewGlobalRef(SliceJni::construct0(env)); |
||||
m_jSliceLimit = env->NewGlobalRef(SliceJni::construct0(env)); |
||||
} |
||||
|
||||
ComparatorJniCallback::~ComparatorJniCallback() { |
||||
JNIEnv* m_env = getJniEnv(); |
||||
m_env->DeleteGlobalRef(m_jSliceA); |
||||
m_env->DeleteGlobalRef(m_jSliceB); |
||||
m_env->DeleteGlobalRef(m_jSliceLimit); |
||||
} |
||||
|
||||
DirectComparatorJniCallback::DirectComparatorJniCallback( |
||||
JNIEnv* env, jobject jComparator, |
||||
const ComparatorJniCallbackOptions* copt) : |
||||
BaseComparatorJniCallback(env, jComparator, copt) { |
||||
m_jSliceA = env->NewGlobalRef(DirectSliceJni::construct0(env)); |
||||
m_jSliceB = env->NewGlobalRef(DirectSliceJni::construct0(env)); |
||||
m_jSliceLimit = env->NewGlobalRef(DirectSliceJni::construct0(env)); |
||||
} |
||||
|
||||
DirectComparatorJniCallback::~DirectComparatorJniCallback() { |
||||
JNIEnv* m_env = getJniEnv(); |
||||
m_env->DeleteGlobalRef(m_jSliceA); |
||||
m_env->DeleteGlobalRef(m_jSliceB); |
||||
m_env->DeleteGlobalRef(m_jSliceLimit); |
||||
} |
||||
} // namespace rocksdb
|
||||
@ -0,0 +1,95 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
//
|
||||
// This file implements the callback "bridge" between Java and C++ for
|
||||
// rocksdb::Comparator and rocksdb::DirectComparator.
|
||||
|
||||
#ifndef JAVA_ROCKSJNI_COMPARATORJNICALLBACK_H_ |
||||
#define JAVA_ROCKSJNI_COMPARATORJNICALLBACK_H_ |
||||
|
||||
#include <jni.h> |
||||
#include <string> |
||||
#include "rocksdb/comparator.h" |
||||
#include "rocksdb/slice.h" |
||||
#include "port/port.h" |
||||
|
||||
namespace rocksdb { |
||||
|
||||
struct ComparatorJniCallbackOptions { |
||||
// Use adaptive mutex, which spins in the user space before resorting
|
||||
// to kernel. This could reduce context switch when the mutex is not
|
||||
// heavily contended. However, if the mutex is hot, we could end up
|
||||
// wasting spin time.
|
||||
// Default: false
|
||||
bool use_adaptive_mutex; |
||||
|
||||
ComparatorJniCallbackOptions() : use_adaptive_mutex(false) { |
||||
} |
||||
}; |
||||
|
||||
/**
|
||||
* This class acts as a bridge between C++ |
||||
* and Java. The methods in this class will be |
||||
* called back from the RocksDB storage engine (C++) |
||||
* we then callback to the appropriate Java method |
||||
* this enables Comparators to be implemented in Java. |
||||
* |
||||
* The design of this Comparator caches the Java Slice |
||||
* objects that are used in the compare and findShortestSeparator |
||||
* method callbacks. Instead of creating new objects for each callback |
||||
* of those functions, by reuse via setHandle we are a lot |
||||
* faster; Unfortunately this means that we have to |
||||
* introduce independent locking in regions of each of those methods |
||||
* via the mutexs mtx_compare and mtx_findShortestSeparator respectively |
||||
*/ |
||||
class BaseComparatorJniCallback : public Comparator { |
||||
public: |
||||
BaseComparatorJniCallback( |
||||
JNIEnv* env, jobject jComparator, |
||||
const ComparatorJniCallbackOptions* copt); |
||||
virtual ~BaseComparatorJniCallback(); |
||||
virtual const char* Name() const; |
||||
virtual int Compare(const Slice& a, const Slice& b) const; |
||||
virtual void FindShortestSeparator( |
||||
std::string* start, const Slice& limit) const; |
||||
virtual void FindShortSuccessor(std::string* key) const; |
||||
|
||||
private: |
||||
// used for synchronisation in compare method
|
||||
port::Mutex* mtx_compare; |
||||
// used for synchronisation in findShortestSeparator method
|
||||
port::Mutex* mtx_findShortestSeparator; |
||||
JavaVM* m_jvm; |
||||
jobject m_jComparator; |
||||
std::string m_name; |
||||
jmethodID m_jCompareMethodId; |
||||
jmethodID m_jFindShortestSeparatorMethodId; |
||||
jmethodID m_jFindShortSuccessorMethodId; |
||||
|
||||
protected: |
||||
JNIEnv* getJniEnv() const; |
||||
jobject m_jSliceA; |
||||
jobject m_jSliceB; |
||||
jobject m_jSliceLimit; |
||||
}; |
||||
|
||||
class ComparatorJniCallback : public BaseComparatorJniCallback { |
||||
public: |
||||
ComparatorJniCallback( |
||||
JNIEnv* env, jobject jComparator, |
||||
const ComparatorJniCallbackOptions* copt); |
||||
~ComparatorJniCallback(); |
||||
}; |
||||
|
||||
class DirectComparatorJniCallback : public BaseComparatorJniCallback { |
||||
public: |
||||
DirectComparatorJniCallback( |
||||
JNIEnv* env, jobject jComparator, |
||||
const ComparatorJniCallbackOptions* copt); |
||||
~DirectComparatorJniCallback(); |
||||
}; |
||||
} // namespace rocksdb
|
||||
|
||||
#endif // JAVA_ROCKSJNI_COMPARATORJNICALLBACK_H_
|
||||
@ -0,0 +1,251 @@ |
||||
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under the BSD-style license found in the
|
||||
// LICENSE file in the root directory of this source tree. An additional grant
|
||||
// of patent rights can be found in the PATENTS file in the same directory.
|
||||
//
|
||||
// This file implements the "bridge" between Java and C++ for
|
||||
// rocksdb::Slice.
|
||||
|
||||
#include <stdio.h> |
||||
#include <stdlib.h> |
||||
#include <jni.h> |
||||
#include <string> |
||||
|
||||
#include "include/org_rocksdb_AbstractSlice.h" |
||||
#include "include/org_rocksdb_Slice.h" |
||||
#include "include/org_rocksdb_DirectSlice.h" |
||||
#include "rocksdb/slice.h" |
||||
#include "rocksjni/portal.h" |
||||
|
||||
// <editor-fold desc="org.rocksdb.AbstractSlice>
|
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: createNewSliceFromString |
||||
* Signature: (Ljava/lang/String;)V |
||||
*/ |
||||
void Java_org_rocksdb_AbstractSlice_createNewSliceFromString( |
||||
JNIEnv* env, jobject jobj, jstring str) { |
||||
const std::string s = rocksdb::JniUtil::copyString(env, str); |
||||
const rocksdb::Slice* slice = new rocksdb::Slice(s); |
||||
rocksdb::AbstractSliceJni::setHandle(env, jobj, slice); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: size0 |
||||
* Signature: (J)I |
||||
*/ |
||||
jint Java_org_rocksdb_AbstractSlice_size0( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
return slice->size(); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: empty0 |
||||
* Signature: (J)Z |
||||
*/ |
||||
jboolean Java_org_rocksdb_AbstractSlice_empty0( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
return slice->empty(); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: toString0 |
||||
* Signature: (JZ)Ljava/lang/String; |
||||
*/ |
||||
jstring Java_org_rocksdb_AbstractSlice_toString0( |
||||
JNIEnv* env, jobject jobj, jlong handle, jboolean hex) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
const std::string s = slice->ToString(hex); |
||||
return env->NewStringUTF(s.c_str()); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: compare0 |
||||
* Signature: (JJ)I; |
||||
*/ |
||||
jint Java_org_rocksdb_AbstractSlice_compare0( |
||||
JNIEnv* env, jobject jobj, jlong handle, jlong otherHandle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
const rocksdb::Slice* otherSlice = |
||||
reinterpret_cast<rocksdb::Slice*>(otherHandle); |
||||
return slice->compare(*otherSlice); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: startsWith0 |
||||
* Signature: (JJ)Z; |
||||
*/ |
||||
jboolean Java_org_rocksdb_AbstractSlice_startsWith0( |
||||
JNIEnv* env, jobject jobj, jlong handle, jlong otherHandle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
const rocksdb::Slice* otherSlice = |
||||
reinterpret_cast<rocksdb::Slice*>(otherHandle); |
||||
return slice->starts_with(*otherSlice); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_AbstractSlice |
||||
* Method: disposeInternal |
||||
* Signature: (J)V |
||||
*/ |
||||
void Java_org_rocksdb_AbstractSlice_disposeInternal( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
delete reinterpret_cast<rocksdb::Slice*>(handle); |
||||
} |
||||
|
||||
// </editor-fold>
|
||||
|
||||
// <editor-fold desc="org.rocksdb.Slice>
|
||||
|
||||
/*
|
||||
* Class: org_rocksdb_Slice |
||||
* Method: createNewSlice0 |
||||
* Signature: ([BI)V |
||||
*/ |
||||
void Java_org_rocksdb_Slice_createNewSlice0( |
||||
JNIEnv * env, jobject jobj, jbyteArray data, jint offset) { |
||||
|
||||
const jsize dataSize = env->GetArrayLength(data); |
||||
const int len = dataSize - offset; |
||||
jbyte* ptrData = new jbyte[len]; |
||||
env->GetByteArrayRegion(data, offset, len, ptrData); |
||||
|
||||
const rocksdb::Slice* slice = new rocksdb::Slice((const char*)ptrData, len); |
||||
rocksdb::AbstractSliceJni::setHandle(env, jobj, slice); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_Slice |
||||
* Method: createNewSlice1 |
||||
* Signature: ([B)V |
||||
*/ |
||||
void Java_org_rocksdb_Slice_createNewSlice1( |
||||
JNIEnv * env, jobject jobj, jbyteArray data) { |
||||
|
||||
const int len = env->GetArrayLength(data); |
||||
|
||||
jboolean isCopy; |
||||
jbyte* ptrData = env->GetByteArrayElements(data, &isCopy); |
||||
const char* buf = new char[len]; |
||||
memcpy(const_cast<char*>(buf), ptrData, len); |
||||
|
||||
const rocksdb::Slice* slice = |
||||
new rocksdb::Slice(buf, env->GetArrayLength(data)); |
||||
rocksdb::AbstractSliceJni::setHandle(env, jobj, slice); |
||||
|
||||
env->ReleaseByteArrayElements(data, ptrData, JNI_ABORT); |
||||
|
||||
// NOTE: buf will be deleted in the org.rocksdb.Slice#dispose method
|
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_Slice |
||||
* Method: data0 |
||||
* Signature: (J)[B |
||||
*/ |
||||
jbyteArray Java_org_rocksdb_Slice_data0( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
const int len = slice->size(); |
||||
const jbyteArray data = env->NewByteArray(len); |
||||
env->SetByteArrayRegion(data, 0, len, |
||||
reinterpret_cast<jbyte*>(const_cast<char*>(slice->data()))); |
||||
return data; |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_Slice |
||||
* Method: disposeInternalBuf |
||||
* Signature: (J)V |
||||
*/ |
||||
void Java_org_rocksdb_Slice_disposeInternalBuf( |
||||
JNIEnv * env, jobject jobj, jlong handle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
delete [] slice->data_; |
||||
} |
||||
|
||||
// </editor-fold>
|
||||
|
||||
// <editor-fold desc="org.rocksdb.DirectSlice>
|
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectSlice |
||||
* Method: createNewDirectSlice0 |
||||
* Signature: (Ljava/nio/ByteBuffer;I)V |
||||
*/ |
||||
void Java_org_rocksdb_DirectSlice_createNewDirectSlice0( |
||||
JNIEnv* env, jobject jobj, jobject data, jint length) { |
||||
const char* ptrData = |
||||
reinterpret_cast<char*>(env->GetDirectBufferAddress(data)); |
||||
const rocksdb::Slice* slice = new rocksdb::Slice(ptrData, length); |
||||
rocksdb::AbstractSliceJni::setHandle(env, jobj, slice); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectSlice |
||||
* Method: createNewDirectSlice1 |
||||
* Signature: (Ljava/nio/ByteBuffer;)V |
||||
*/ |
||||
void Java_org_rocksdb_DirectSlice_createNewDirectSlice1( |
||||
JNIEnv* env, jobject jobj, jobject data) { |
||||
const char* ptrData = |
||||
reinterpret_cast<char*>(env->GetDirectBufferAddress(data)); |
||||
const rocksdb::Slice* slice = new rocksdb::Slice(ptrData); |
||||
rocksdb::AbstractSliceJni::setHandle(env, jobj, slice); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectSlice |
||||
* Method: data0 |
||||
* Signature: (J)Ljava/lang/Object; |
||||
*/ |
||||
jobject Java_org_rocksdb_DirectSlice_data0( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
const rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
return env->NewDirectByteBuffer(const_cast<char*>(slice->data()), |
||||
slice->size()); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectSlice |
||||
* Method: get0 |
||||
* Signature: (JI)B |
||||
*/ |
||||
jbyte Java_org_rocksdb_DirectSlice_get0( |
||||
JNIEnv* env, jobject jobj, jlong handle, jint offset) { |
||||
rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
return (*slice)[offset]; |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectSlice |
||||
* Method: clear0 |
||||
* Signature: (J)V |
||||
*/ |
||||
void Java_org_rocksdb_DirectSlice_clear0( |
||||
JNIEnv* env, jobject jobj, jlong handle) { |
||||
rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
delete [] slice->data_; |
||||
slice->clear(); |
||||
} |
||||
|
||||
/*
|
||||
* Class: org_rocksdb_DirectSlice |
||||
* Method: removePrefix0 |
||||
* Signature: (JI)V |
||||
*/ |
||||
void Java_org_rocksdb_DirectSlice_removePrefix0( |
||||
JNIEnv* env, jobject jobj, jlong handle, jint length) { |
||||
rocksdb::Slice* slice = reinterpret_cast<rocksdb::Slice*>(handle); |
||||
slice->remove_prefix(length); |
||||
} |
||||
|
||||
// </editor-fold>
|
||||
Loading…
Reference in new issue