package org.multiverse.stms.gamma.integration.blocking;
import org.junit.After;
import org.junit.Before;
import org.multiverse.TestThread;
import org.multiverse.api.Txn;
import org.multiverse.api.TxnExecutor;
import org.multiverse.api.callables.TxnCallable;
import org.multiverse.api.callables.TxnVoidCallable;
import org.multiverse.stms.gamma.GammaConstants;
import org.multiverse.stms.gamma.GammaStm;
import org.multiverse.stms.gamma.transactionalobjects.GammaTxnRef;
import java.util.HashSet;
import java.util.LinkedList;
import static org.junit.Assert.assertEquals;
import static org.multiverse.TestUtils.joinAll;
import static org.multiverse.TestUtils.startAll;
import static org.multiverse.api.TxnThreadLocal.clearThreadLocalTxn;
/**
* The test is not very efficient since a lot of temporary objects like the transaction template are created.
* But that is alright for this test since it isn't a benchmark.
*
* @author Peter Veentjer.
*/
public abstract class StackWithoutCapacity_AbstractTest implements GammaConstants {
public GammaStm stm;
private int itemCount = 5 * 1000 * 1000;
private Stack<Integer> stack;
@Before
public void setUp() {
clearThreadLocalTxn();
stm = new GammaStm();
}
@After
public void tearDown() {
if (stack != null) {
System.out.println(stack.head.toDebugString());
}
}
public void run() {
stack = new Stack<Integer>();
ProduceThread produceThread = new ProduceThread();
ConsumeThread consumeThread = new ConsumeThread();
startAll(produceThread, consumeThread);
joinAll(produceThread, consumeThread);
System.out.println("finished executing, checking if content is correct (can take some time)");
assertEquals(itemCount, produceThread.producedItems.size());
assertEquals(
new HashSet<Integer>(produceThread.producedItems),
new HashSet<Integer>(consumeThread.consumedItems));
System.out.println("Finished comparing content");
}
class ConsumeThread extends TestThread {
private final LinkedList<Integer> consumedItems = new LinkedList<Integer>();
public ConsumeThread() {
super("ConsumeThread");
}
@Override
public void doRun() throws Exception {
for (int k = 0; k < itemCount; k++) {
int item = stack.pop();
consumedItems.add(item);
if (k % 100000 == 0) {
System.out.printf("%s is at %s\n", getName(), k);
}
}
}
}
class ProduceThread extends TestThread {
private final LinkedList<Integer> producedItems = new LinkedList<Integer>();
public ProduceThread() {
super("ProduceThread");
}
@Override
public void doRun() throws Exception {
for (int k = 0; k < itemCount; k++) {
stack.push(k);
producedItems.add(k);
if (k % 100000 == 0) {
System.out.printf("%s is at %s\n", getName(), k);
}
}
}
}
class Stack<E> {
private final GammaTxnRef<Node<E>> head = new GammaTxnRef<Node<E>>(stm);
private final TxnExecutor pushExecutor = newPushTxnExecutor();
private final TxnExecutor popExecutor = newPopTxnExecutor();
public void push(final E item) {
pushExecutor.execute(new TxnVoidCallable() {
@Override
public void call(Txn tx) throws Exception {
head.set(new Node<E>(item, head.get()));
}
});
}
public E pop() {
return popExecutor.execute(new TxnCallable<E>() {
@Override
public E call(Txn tx) throws Exception {
Node<E> node = head.awaitNotNullAndGet();
head.set(node.next);
return node.item;
}
});
}
}
protected abstract TxnExecutor newPopTxnExecutor();
protected abstract TxnExecutor newPushTxnExecutor();
class Node<E> {
final E item;
Node<E> next;
Node(E item, Node<E> next) {
this.item = item;
this.next = next;
}
}
}