/*
* 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.system;
import static org.junit.Assert.assertEquals ;
import org.apache.jena.system.Txn ;
import org.apache.jena.system.TxnCounter ;
import org.junit.Test ;
public class TestTxn {
TxnCounter counter = new TxnCounter(0) ;
@Test public void txn_basic_01() {
long v1 = counter.get() ;
assertEquals(0, v1) ;
Txn.executeRead(counter, () -> {
assertEquals(0, counter.get()) ;
}) ;
}
@Test public void txn_basic_02() {
long x =
Txn.calculateRead(counter, () -> {
assertEquals("In R, value()", 0, counter.value()) ;
assertEquals("In R, get()", 0, counter.get()) ;
return counter.get() ;
}) ;
assertEquals("Outside R", 0, x) ;
}
@Test public void txn_basic_03() {
Txn.executeWrite(counter, counter::inc) ;
long x =
Txn.calculateRead(counter, () -> {
assertEquals("In R, value()", 1, counter.value()) ;
assertEquals("In R, get()", 1, counter.get()) ;
return counter.get() ;
}) ;
assertEquals("Outside R", 1, x) ;
}
@Test public void txn_basic_05() {
long x =
Txn.calculateWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
return counter.get() ;
}) ;
assertEquals("Outside W",1, x) ;
}
@Test public void txn_write_01() {
long x =
Txn.calculateWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
long z = counter.get() ;
counter.commit() ;
return z ;
}) ;
assertEquals("Outside W",1, x) ;
}
@Test public void txn_write_02() {
long x =
Txn.calculateWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
long z = counter.get() ;
counter.abort() ;
return z ;
}) ;
assertEquals("Outside W",1, x) ;
}
@Test public void txn_write_03() {
Txn.executeWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
counter.commit() ;
}) ;
assertEquals("Outside W",1, counter.value()) ;
}
@Test public void txn_write_04() {
Txn.executeWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
counter.abort() ;
}) ;
assertEquals("Outside W", 0, counter.value()) ;
}
@Test public void txn_rw_1() {
assertEquals(0, counter.get()) ;
Txn.executeWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
}) ;
assertEquals("Direct value()", 1, counter.value()) ;
assertEquals("Direct get()", 1, counter.get()) ;
Txn.executeRead(counter, () -> {
assertEquals("In R, value()", 1, counter.value()) ;
assertEquals("In R, get()", 1, counter.get()) ;
}) ;
}
@Test public void txn_rw_2() {
Txn.executeRead(counter, () -> {
assertEquals("In R, value()", 0, counter.value()) ;
assertEquals("In R, get()", 0, counter.get()) ;
}) ;
Txn.executeWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 0, counter.value()) ;
assertEquals("In W, get()",1, counter.get()) ;
}) ;
assertEquals("Direct value()", 1, counter.get()) ;
assertEquals("Direct get()", 1, counter.get()) ;
Txn.executeRead(counter, () -> {
assertEquals("In R, value()", 1, counter.value()) ;
assertEquals("In R, get()", 1, counter.get()) ;
}) ;
}
@Test public void txn_continue_1() {
Txn.executeWrite(counter, ()->counter.set(91)) ;
Txn.executeWrite(counter, ()-> {
assertEquals("In txn, value()", 91, counter.value()) ;
assertEquals("In txn, read()", 91, counter.read()) ;
counter.inc();
Txn.executeWrite(counter, ()->{
assertEquals("In txn, value()", 91, counter.value()) ;
assertEquals("In txn, get()", 92, counter.read()) ;
}) ;
});
assertEquals(92,counter.value()) ;
}
@Test public void txn_continue_2() {
Txn.executeWrite(counter, ()->counter.set(91)) ;
Txn.executeWrite(counter, ()-> {
assertEquals("In txn, value()", 91, counter.value()) ;
assertEquals("In txn, read()", 91, counter.read()) ;
counter.inc();
Txn.executeWrite(counter, ()->{
assertEquals("In txn, value()", 91, counter.value()) ;
assertEquals("In txn, get()", 92, counter.read()) ;
counter.inc();
}) ;
assertEquals("In txn, value()", 91, counter.value()) ;
assertEquals("In txn, read()", 93, counter.read()) ;
counter.inc();
});
assertEquals(94,counter.value()) ;
}
@Test(expected=ExceptionFromTest.class)
public void txn_exception_01() {
Txn.executeWrite(counter, counter::inc) ;
Txn.executeWrite(counter, () -> {
counter.inc() ;
assertEquals("In W, value()", 1, counter.value()) ;
assertEquals("In W, get()",2, counter.get()) ;
throw new ExceptionFromTest() ;
}) ;
}
@Test
public void txn_exception_02() {
Txn.executeWrite(counter, ()->counter.set(8)) ;
try {
Txn.executeWrite(counter, () -> {
counter.inc();
assertEquals("In W, value()", 8, counter.value());
assertEquals("In W, get()", 9, counter.get());
throw new ExceptionFromTest();
});
}
catch (ExceptionFromTest ex) {}
assertEquals("After W/abort, get()", 8, counter.get());
}
@Test
public void txn_exception_03() {
Txn.executeWrite(counter, ()->counter.set(9)) ;
try {
Txn.executeRead(counter, () -> {
assertEquals("In W, value()", 9, counter.value());
assertEquals("In W, get()", 9, counter.get());
throw new ExceptionFromTest();
});
}
catch (ExceptionFromTest ex) {}
assertEquals("After W/abort, get()", 9, counter.get());
}
// Tests for thread transactions.
}