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*
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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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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/* @test
* @bug 7007609 7009618
* @summary Check that ZipFile objects are always collected
*/
import java.io.*;
import java.nio.*;
import java.util.Random;
import java.util.zip.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
public class FinalizeZipFile {
private final static CountDownLatch finalizersDone = new CountDownLatch(3);
private static class InstrumentedZipFile extends ZipFile {
public InstrumentedZipFile(File f) throws Exception {
super(f);
System.out.printf("Using %s%n", f.getPath());
}
protected void finalize() throws IOException {
System.out.printf("Killing %s%n", getName());
super.finalize();
finalizersDone.countDown();
}
}
private static void makeGarbage() throws Throwable {
final Random rnd = new Random();
final String javaHome = System.getProperty("java.home");
// Create some ZipFiles.
// Find some .jar files in JDK's lib directory.
final File lib = new File(javaHome, "lib");
check(lib.isDirectory());
final File[] jars = lib.listFiles(
new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.endsWith(".jar");}});
check(jars.length > 1);
new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close();
new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close();
// Create a ZipFile and get an input stream from it
ZipFile zf = new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]);
ZipEntry ze = zf.getEntry("META-INF/MANIFEST.MF");
InputStream is = zf.getInputStream(ze);
}
public static void realMain(String[] args) throws Throwable {
makeGarbage();
System.gc();
finalizersDone.await(5, TimeUnit.SECONDS);
// Not all ZipFiles were collected?
equal(finalizersDone.getCount(), 0L);
}
//--------------------- Infrastructure ---------------------------
static volatile int passed = 0, failed = 0;
static void pass() {passed++;}
static void fail() {failed++; Thread.dumpStack();}
static void fail(String msg) {System.out.println(msg); fail();}
static void unexpected(Throwable t) {failed++; t.printStackTrace();}
static void check(boolean cond) {if (cond) pass(); else fail();}
static void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
try {realMain(args);} catch (Throwable t) {unexpected(t);}
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
}