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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
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/*
* @ test
* @ bug 8234011
* @ summary Check that jdk . nio . zipfs . ZipFileSystem doesn ' t cache more than ZipFileSystem . MAX_FLATER Inflater / Deflater objects
* @ run main ReleaseDeflater
* @ modules jdk . zipfs / jdk . nio . zipfs : + open
* @ author Volker Simonis
*/
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.spi.FileSystemProvider;
import java.util.List;
import java.util.Map;
import java.util.ArrayList;
public class ReleaseDeflater {
public static void main(String[] args) throws Throwable {
Path zipFile = Paths.get("ReleaseDeflaterTest.zip" );
try (FileSystem fs = FileSystems.newFileSystem(zipFile, Map.of("create" , true ))) {
FileSystemProvider zprov = fs.provider();
Path test = fs.getPath("test.txt" );
int STREAMS = 100 ;
List<OutputStream> ostreams = new ArrayList<>(STREAMS);
List<InputStream> istreams = new ArrayList<>(STREAMS);
for (int i = 0 ; i < STREAMS; i++) {
OutputStream zos = zprov.newOutputStream(test);
ostreams.add(zos);
zos.write("Hello" .getBytes());
}
for (OutputStream os : ostreams) {
os.close();
}
for (int i = 0 ; i < STREAMS; i++) {
InputStream zis = zprov.newInputStream(test);
istreams.add(zis);
}
for (InputStream is : istreams) {
is.close();
}
try {
Field max_flaters = fs.getClass().getDeclaredField("MAX_FLATER" );
max_flaters.setAccessible(true );
int MAX_FLATERS = max_flaters.getInt(fs);
Field inflaters = fs.getClass().getDeclaredField("inflaters" );
inflaters.setAccessible(true );
int inflater_count = ((List<?>) inflaters.get(fs)).size();
if (inflater_count > MAX_FLATERS) {
throw new Exception("Too many inflaters " + inflater_count);
}
Field deflaters = fs.getClass().getDeclaredField("deflaters" );
deflaters.setAccessible(true );
int deflater_count = ((List<?>) deflaters.get(fs)).size();
if (deflater_count > MAX_FLATERS) {
throw new Exception("Too many deflaters " + deflater_count);
}
} catch (NoSuchFieldException nsfe) {
// Probably the implementation has changed, so there's not much we can do...
throw new RuntimeException("Implementation of jdk.nio.zipfs.ZipFileSystem changed - disable or fix the test" );
}
} finally {
Files.deleteIfExists(zipFile);
}
}
}
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