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ec24bd4e
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rocksdb
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rocksdb
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体验新版 GitCode,发现更多精彩内容 >>
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ec24bd4e
编写于
11月 16, 2014
作者:
Y
Yueh-Hsuan Chiang
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差异文件
Merge pull request #402 from adamretter/bugfix-native-library-loader
Use correct classloader in Java NativeLibraryLoader
上级
d3c4a0f4
585c759c
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
45 addition
and
28 deletion
+45
-28
java/org/rocksdb/NativeLibraryLoader.java
java/org/rocksdb/NativeLibraryLoader.java
+44
-27
java/org/rocksdb/RocksDB.java
java/org/rocksdb/RocksDB.java
+1
-1
未找到文件。
java/org/rocksdb/NativeLibraryLoader.java
浏览文件 @
ec24bd4e
package
org.rocksdb
;
import
java.io.*
;
import
java.nio.file.Files
;
import
java.nio.file.StandardCopyOption
;
import
org.rocksdb.util.Environment
;
/**
...
...
@@ -8,42 +11,56 @@ import org.rocksdb.util.Environment;
* The shared library is extracted to a temp folder and loaded from there.
*/
public
class
NativeLibraryLoader
{
private
static
String
sharedLibraryName
=
Environment
.
getJniLibraryName
(
"rocksdb"
);
private
static
String
tempFileSuffix
=
"."
+
Environment
.
getJniLibraryExtension
();
//singleton
private
static
final
NativeLibraryLoader
instance
=
new
NativeLibraryLoader
();
private
static
final
String
sharedLibraryName
=
Environment
.
getJniLibraryName
(
"rocksdb"
);
private
static
final
String
tempFilePrefix
=
"librocksdbjni"
;
private
static
final
String
tempFileSuffix
=
"."
+
Environment
.
getJniLibraryExtension
();
public
static
void
loadLibraryFromJar
(
String
tmpDir
)
/**
* Get a reference to the NativeLibraryLoader
*
* @return The NativeLibraryLoader
*/
public
static
NativeLibraryLoader
getInstance
()
{
return
instance
;
}
/**
* Attempts to extract the native RocksDB library
* from the classpath and load it
*
* @param tmpDir A temporary directory to use
* to copy the native library to. If null,
* or the empty string, we rely on Java's
* {@see java.io.File#createTempFile(String, String) }
* function to provide a temporary location.
* The temporary file will be registered for deletion
* on exit.
*/
public
void
loadLibraryFromJar
(
final
String
tmpDir
)
throws
IOException
{
File
temp
;
String
tempFilePrefix
=
"librocksdbjni"
;
if
(
tmpDir
==
null
||
tmpDir
.
equals
(
""
))
final
File
temp
;
if
(
tmpDir
==
null
||
tmpDir
.
equals
(
""
))
{
temp
=
File
.
createTempFile
(
tempFilePrefix
,
tempFileSuffix
);
else
temp
=
new
File
(
tmpDir
+
"/"
+
sharedLibraryName
);
temp
.
deleteOnExit
();
}
else
{
temp
=
new
File
(
tmpDir
,
sharedLibraryName
);
}
if
(!
temp
.
exists
())
{
throw
new
RuntimeException
(
"File "
+
temp
.
getAbsolutePath
()
+
" does not exist."
);
}
else
{
temp
.
deleteOnExit
();
}
byte
[]
buffer
=
new
byte
[
102400
];
int
readBytes
;
InputStream
is
=
ClassLoader
.
getSystemClassLoader
().
getResourceAsStream
(
sharedLibraryName
);
if
(
is
==
null
)
{
throw
new
RuntimeException
(
sharedLibraryName
+
" was not found inside JAR."
);
}
OutputStream
os
=
null
;
try
{
os
=
new
FileOutputStream
(
temp
);
while
((
readBytes
=
is
.
read
(
buffer
))
!=
-
1
)
{
os
.
write
(
buffer
,
0
,
readBytes
);
// attempt to copy the library from the Jar file to the temp destination
try
(
final
InputStream
is
=
getClass
().
getClassLoader
().
getResourceAsStream
(
sharedLibraryName
))
{
if
(
is
==
null
)
{
throw
new
RuntimeException
(
sharedLibraryName
+
" was not found inside JAR."
);
}
else
{
Files
.
copy
(
is
,
temp
.
toPath
(),
StandardCopyOption
.
REPLACE_EXISTING
);
}
}
finally
{
if
(
os
!=
null
)
os
.
close
();
is
.
close
();
}
System
.
load
(
temp
.
getAbsolutePath
());
...
...
java/org/rocksdb/RocksDB.java
浏览文件 @
ec24bd4e
...
...
@@ -44,7 +44,7 @@ public class RocksDB extends RocksObject {
}
try
{
NativeLibraryLoader
.
loadLibraryFromJar
(
tmpDir
);
NativeLibraryLoader
.
getInstance
().
loadLibraryFromJar
(
tmpDir
);
}
catch
(
IOException
e
)
{
...
...
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