/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.tdb.store;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import org.apache.jena.tdb.StoreConnection ;
import org.apache.jena.tdb.TDBException ;
import org.apache.jena.tdb.base.file.Location ;
import org.apache.jena.tdb.base.file.LocationLock ;
import org.apache.jena.tdb.sys.ProcessUtils ;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
/**
* Tests for {@link LocationLock} inconjucntion with {@link StoreConnection}s
*/
public class TestLocationLockStoreConnection {
private static boolean negativePidsTreatedAsAlive = false;
@Rule
public TemporaryFolder tempDir = new TemporaryFolder();
@BeforeClass
public static void setup() {
negativePidsTreatedAsAlive = ProcessUtils.negativePidsTreatedAsAlive();
}
@Test
public void location_lock_store_connection_01() {
Location dir = Location.create(tempDir.getRoot().getAbsolutePath());
LocationLock lock = dir.getLock();
Assert.assertTrue(lock.canLock());
Assert.assertFalse(lock.isLocked());
Assert.assertFalse(lock.isOwned());
Assert.assertTrue(lock.canObtain());
// Creating a StoreConnection on the location will obtain the lock
StoreConnection.make(dir);
Assert.assertTrue(lock.isLocked());
Assert.assertTrue(lock.isOwned());
Assert.assertTrue(lock.canObtain());
// Releasing the connection releases the lock
StoreConnection.release(dir);
Assert.assertFalse(lock.isLocked());
Assert.assertFalse(lock.isOwned());
Assert.assertTrue(lock.canObtain());
}
@Test(expected = TDBException.class)
public void location_lock_store_connection_02() throws IOException {
Assume.assumeTrue(negativePidsTreatedAsAlive);
Location dir = Location.create(tempDir.getRoot().getAbsolutePath());
LocationLock lock = dir.getLock();
Assert.assertTrue(lock.canLock());
Assert.assertFalse(lock.isLocked());
Assert.assertFalse(lock.isOwned());
Assert.assertTrue(lock.canObtain());
// Write a fake PID to the lock file
try(BufferedWriter writer =
new BufferedWriter(new FileWriter(dir.getPath("tdb.lock")))) {
// Fake PID that would never be valid
writer.write(Integer.toString(-1234));
}
Assert.assertTrue(lock.isLocked());
Assert.assertFalse(lock.isOwned());
// Attempting to create a connection on this location should error
StoreConnection.make(dir);
}
}