@Test
public void libTxn_3() {
Txn.executeRead(
unit,
() -> {
assertEquals("In R, value()", 0, counter2.get());
assertEquals("In R, get()", 0, counter2.value());
});
Txn.executeWrite(
unit,
() -> {
counter2.inc();
assertEquals("In W, value()", 0, counter2.value());
assertEquals("In W, get()", 1, counter2.get());
});
assertEquals("Direct value()", 1, counter2.value());
assertEquals("Direct get()", 1, counter2.get());
Txn.executeRead(
unit,
() -> {
assertEquals("In R, value()", 1, counter2.get());
assertEquals("In R, get()", 1, counter2.value());
});
}
public void map(LongWritable key, Text value, Context context)
throws IOException, InterruptedException {
String[] columns = value.toString().split(",");
outkey.set(columns[2]);
outvalue.setAmount(Integer.parseInt(columns[3]));
outvalue.setProduct(columns[4]);
outvalue.setTxnDate(columns[1]);
context.write(outkey, outvalue);
}
/**
* If we need to, add this manager to the list of transactions that need to be monitored because
* of conflicts over this entry. Any existing blocking txn is sufficient.
*
* @see TxnMonitorTask#addSibling
*/
private void monitor(TransactableMgr mgr) {
Txn txn = (Txn) mgr;
Iterator it = ((HashSet) mgrs).iterator();
while (it.hasNext()) {
Txn otherTxn = (Txn) it.next();
if (otherTxn != mgr && otherTxn.monitorTask() != null) {
otherTxn.monitorTask().addSibling(txn);
return;
}
}
}
@Test
public void libTxnThread_12() {
long x1 = counter1.get();
ThreadTxn t =
Txn.threadTxnRead(
unit,
() -> {
long z1 = counter1.get();
assertEquals("Thread", x1, z1);
});
Txn.executeWrite(unit, () -> counter1.inc());
t.run();
long x2 = counter1.get();
assertEquals("after", x1 + 1, x2);
}
@Test
public void libTxn_4() {
long v1 = counter1.value();
long v2 = counter2.value();
assertEquals(0, v1);
assertEquals(0, v2);
// Txn.executeWrite(unit, () -> {
unit.begin(ReadWrite.WRITE);
counter1.inc();
counter2.inc();
assertEquals("Counter out of step", counter1.get(), counter2.get());
assertNotEquals("Counter 1 can see wrong state", counter1.get(), counter1.value());
assertNotEquals("Counter 2 can see wrong state", counter2.get(), counter2.value());
counter2.inc();
assertNotEquals("Counter 1 and 2 shoudl differ", counter1.get(), counter2.get());
unit.commit();
unit.end();
// }) ;
assertEquals("Component 1 inconsistent", 1, counter1.value());
assertEquals("Component 2 inconsistent", 2, counter2.value());
Txn.executeRead(
unit,
() -> {
assertEquals("Component 1 inconsistent (R)", 1, counter1.get());
assertEquals("Component 2 inconsistent (R)", 2, counter2.get());
});
}
@Test
public void libTxn_7() {
long x1 =
Txn.executeWriteReturn(
unit,
() -> {
counter2.inc();
counter2.inc();
return counter2.get();
});
long x2 =
Txn.executeReadReturn(
unit,
() -> {
return counter2.get();
});
assertEquals("After W and R", x1, x2);
}
@Test
public void libTxnThread_11() {
long x1 = counter1.get();
Txn.executeWrite(
unit,
() -> {
counter1.inc();
// Read the "before" state
ThreadTxn t =
Txn.threadTxnRead(
unit,
() -> {
long z1 = counter1.get();
assertEquals("Thread read", x1, z1);
});
counter1.inc();
t.run();
});
long x2 = counter1.get();
assertEquals("after", x1 + 2, x2);
}
@Test
public void libTxn_5() {
long x =
Txn.executeReadReturn(
unit,
() -> {
assertEquals("In R, value()", 0, counter2.get());
assertEquals("In R, get()", 0, counter2.value());
return counter2.get();
});
assertEquals("Outside R", 0, x);
}
@Test
public void libTxn_6() {
long x =
Txn.executeWriteReturn(
unit,
() -> {
counter2.inc();
assertEquals("In W, value()", 0, counter2.value());
assertEquals("In W, get()", 1, counter2.get());
return counter2.get();
});
assertEquals("Outside W", 1, x);
}
@Test
public void libTxn_1() {
long v1 = counter1.value();
long v2 = counter2.value();
assertEquals(0, v1);
assertEquals(0, v2);
Txn.executeRead(
unit,
() -> {
assertEquals(0, counter1.get());
assertEquals(0, counter2.get());
});
}
@Test
public void libTxnThread_10() {
long x1 = counter1.get();
ThreadTxn t =
Txn.threadTxnWrite(
unit,
() -> {
counter1.inc();
});
long x2 = counter1.get();
assertEquals("x2", x1, x2);
t.run();
long x3 = counter1.get();
assertEquals("x3", x1 + 1, x3);
}
public void reduce(Text key, Iterable<Txn> values, Context context)
throws IOException, InterruptedException {
Txn max = new Txn();
for (Txn txn : values) {
if (max.getAmount() < txn.getAmount()) {
max = txn;
}
}
outvalue.set(
"Max amount = "
+ max.getAmount()
+ " & product = "
+ max.getProduct()
+ " & date = "
+ max.getTxnDate());
context.write(key, outvalue);
}
@Test(expected = AssertionError.class)
public void libTxnThread_3() {
ThreadTxn t = Txn.threadTxnWrite(unit, () -> fail(""));
t.run();
}
@Test
public void libTxnThread_2() {
ThreadTxn t = Txn.threadTxnWrite(unit, () -> fail(""));
}
@Test
public void libTxnThread_1() {
ThreadTxn t = Txn.threadTxnRead(unit, () -> {});
t.run();
}
