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Copy pathHeartbeatFileLockTest.java
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94 lines (75 loc) · 2.69 KB
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package org.mapdb;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class HeartbeatFileLockTest {
@Test
public void testFutureModificationDate() throws Exception {
if(TT.scale()==0)
return;
File f = File.createTempFile("mapdbTest","madpb");
f.delete();
f.createNewFile();
f.setLastModified(System.currentTimeMillis() + 10000);
DataIO.HeartbeatFileLock lock = new DataIO.HeartbeatFileLock(f,CC.FILE_LOCK_HEARTBEAT);
lock.lock();
lock.unlock();
}
@Test
public void testSimple() throws IOException {
if(TT.scale()==0)
return;
File f = File.createTempFile("mapdbTest","madpb");
f.delete();
DataIO.HeartbeatFileLock lock1 = new DataIO.HeartbeatFileLock(f,CC.FILE_LOCK_HEARTBEAT);
DataIO.HeartbeatFileLock lock2 = new DataIO.HeartbeatFileLock(f,CC.FILE_LOCK_HEARTBEAT);
f.delete();
new DataIO.HeartbeatFileLock(f,CC.FILE_LOCK_HEARTBEAT);
lock1.lock();
//second lock should throw exception
try{
lock2.lock();
fail();
}catch(DBException.FileLocked e){
//ignored;
}
lock1.unlock();
lock2 = new DataIO.HeartbeatFileLock(f,CC.FILE_LOCK_HEARTBEAT);
lock2.lock();
lock2.unlock();
}
@Test
public void test_parallel() throws InterruptedException, IOException, ExecutionException {
int count = 16* TT.scale();
final long end = System.currentTimeMillis()+100000*count;
if(count==0)
return;
final File f = File.createTempFile("mapdbTest","mapdb");
f.delete();
final AtomicInteger counter = new AtomicInteger();
List<Future> futures = TT.fork(count, new Callable() {
@Override
public Object call() throws Exception {
while (System.currentTimeMillis() < end) {
DataIO.HeartbeatFileLock lock = new DataIO.HeartbeatFileLock(f, CC.FILE_LOCK_HEARTBEAT);
try {
lock.lock();
} catch (DBException.FileLocked e) {
continue;
}
assertEquals(1, counter.incrementAndGet());
lock.unlock();
assertEquals(0, counter.decrementAndGet());
}
return null;
}
});
//await termination
TT.forkAwait(futures);
}
}