Java SubmissionPublisher类代码示例

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
public static void dispatch(int trafficUnitsNumber, double timeSec, DateLocation dateLocation, double[] speedLimitByLane) {

        ExecutorService execService =  ForkJoinPool.commonPool();
        try (SubmissionPublisher<Integer> publisher = new SubmissionPublisher<>()){
            subscribe(publisher, execService, Process.AVERAGE_SPEED, timeSec, dateLocation, speedLimitByLane);
            subscribe(publisher, execService, Process.TRAFFIC_DENSITY, timeSec, dateLocation, speedLimitByLane);
            publisher.submit(trafficUnitsNumber);
        } finally {
            try {
                execService.shutdown();
                execService.awaitTermination(1, TimeUnit.SECONDS);
            } catch (Exception ex) {
                System.out.println("Caught around execService.awaitTermination(): " + ex.getClass().getName());
            } finally {
                execService.shutdownNow();
            }
        }
    }
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
private static void demo4_Flow_submissionPublisher() {
    System.out.println();

    ExecutorService execService =  ForkJoinPool.commonPool();//Executors.newFixedThreadPool(3);
    try (SubmissionPublisher<Integer> publisher = new SubmissionPublisher<>()){//execService, 1)){
        demoSubscribe(publisher, execService, "One");
        demoSubscribe(publisher, execService, "Two");
        demoSubscribe(publisher, execService, "Three");
        IntStream.range(1, 5).forEach(publisher::submit);
    } finally {
        try {
            execService.shutdown();
            int shutdownDelaySec = 1;
            System.out.println("Waiting for " + shutdownDelaySec + " sec before shutting down service...");
            execService.awaitTermination(shutdownDelaySec, TimeUnit.SECONDS);
        } catch (Exception ex) {
            System.out.println("Caught around execService.awaitTermination(): " + ex.getClass().getName());
        } finally {
            System.out.println("Calling execService.shutdownNow()...");
            List<Runnable> l = execService.shutdownNow();
            System.out.println(l.size() + " tasks were waiting to be executed. Service stopped.");
        }

    }

}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
@Test
public void teststockRemoval() throws InterruptedException {
    Stock stock = new Stock();
    SubmissionPublisher<Order> p = new SubmissionPublisher<>();
    p.subscribe(new StockMaintain(stock));
    Product product = new Product();
    stock.store(product, 40);
    OrderItem item = new OrderItem();
    item.setProduct(product);
    item.setAmount(10);
    Order order = new Order();
    List<OrderItem> items = new LinkedList<>();
    items.add(item);
    order.setItems(items);
    for (int i = 0; i < 10; i++)
        p.submit(order);
    log.info("所有订单已经提交完毕");
    for (int j = 0; j < 10; j++) {
        log.info("Sleeping a bit...");
        Thread.sleep(50);
    }
    p.close();
    log.info("Publisher已关闭");
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
@Test
public void testInventoryRemoval() throws InterruptedException {
    Inventory inventory = new Inventory();
    SubmissionPublisher<Order> p = new SubmissionPublisher<>();//Executors.newFixedThreadPool(6), 20);
    p.subscribe(new InventoryKeeper(inventory));
    Product product = new Product();
    inventory.store(product, 20);
    OrderItem item = new OrderItem();
    item.setProduct(product);
    item.setAmount(10);
    Order order = new Order();
    List<OrderItem> items = new LinkedList<>();
    items.add(item);
    order.setItems(items);
    for (int i = 0; i < 10; i++)
        p.submit(order);
    log.info("All orders were submitted");
    for (int j = 0; j < 10; j++) {
        log.info("Sleeping a bit...");
        Thread.sleep(50);
    }
    p.close();
    log.info("Publisher was closed");
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
public static void main(String[] args) {

		Consumer1 consumer1=new Consumer1();
		Consumer2 consumer2=new Consumer2();
		Consumer3 consumer3=new Consumer3();
		
		SubmissionPublisher<Item> publisher=new SubmissionPublisher<>();
		
		publisher.subscribe(consumer1);
		publisher.subscribe(consumer2);
		publisher.subscribe(consumer3);
		
		for (int i=0; i<10; i++) {
			Item item =new Item();
			item.setTitle("Item "+i);
			item.setContent("This is the item "+i);
			publisher.submit(item);
			try {
				TimeUnit.SECONDS.sleep(1);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		
		publisher.close();
	}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * A closed publisher reports isClosed with no closedException and
 * throws IllegalStateException upon attempted submission; a
 * subsequent close or closeExceptionally has no additional
 * effect.
 */
public void testClose() {
    SubmissionPublisher<Integer> p = basicPublisher();
    checkInitialState(p);
    p.close();
    assertTrue(p.isClosed());
    assertNull(p.getClosedException());
    try {
        p.submit(1);
        shouldThrow();
    } catch (IllegalStateException success) {}
    Throwable ex = new SPException();
    p.closeExceptionally(ex);
    assertTrue(p.isClosed());
    assertNull(p.getClosedException());
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * A publisher closedExceptionally reports isClosed with the
 * closedException and throws IllegalStateException upon attempted
 * submission; a subsequent close or closeExceptionally has no
 * additional effect.
 */
public void testCloseExceptionally() {
    SubmissionPublisher<Integer> p = basicPublisher();
    checkInitialState(p);
    Throwable ex = new SPException();
    p.closeExceptionally(ex);
    assertTrue(p.isClosed());
    assertSame(p.getClosedException(), ex);
    try {
        p.submit(1);
        shouldThrow();
    } catch (IllegalStateException success) {}
    p.close();
    assertTrue(p.isClosed());
    assertSame(p.getClosedException(), ex);
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * Upon attempted resubscription, the subscriber's onError is
 * called and the subscription is cancelled.
 */
public void testSubscribe4() {
    TestSubscriber s = new TestSubscriber();
    SubmissionPublisher<Integer> p = basicPublisher();
    p.subscribe(s);
    assertTrue(p.hasSubscribers());
    assertEquals(1, p.getNumberOfSubscribers());
    assertTrue(p.getSubscribers().contains(s));
    assertTrue(p.isSubscribed(s));
    s.awaitSubscribe();
    assertNotNull(s.sn);
    assertEquals(0, s.nexts);
    assertEquals(0, s.errors);
    assertEquals(0, s.completes);
    p.subscribe(s);
    s.awaitError();
    assertEquals(0, s.nexts);
    assertEquals(1, s.errors);
    assertFalse(p.isSubscribed(s));
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * Closing a publisher causes onComplete to subscribers
 */
public void testCloseCompletes() {
    SubmissionPublisher<Integer> p = basicPublisher();
    TestSubscriber s1 = new TestSubscriber();
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s1);
    p.subscribe(s2);
    p.submit(1);
    p.close();
    assertTrue(p.isClosed());
    assertNull(p.getClosedException());
    s1.awaitComplete();
    assertEquals(1, s1.nexts);
    assertEquals(1, s1.completes);
    s2.awaitComplete();
    assertEquals(1, s2.nexts);
    assertEquals(1, s2.completes);
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * Closing a publisher exceptionally causes onError to subscribers
 * after they are subscribed
 */
public void testCloseExceptionallyError() {
    SubmissionPublisher<Integer> p = basicPublisher();
    TestSubscriber s1 = new TestSubscriber();
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s1);
    p.subscribe(s2);
    p.submit(1);
    p.closeExceptionally(new SPException());
    assertTrue(p.isClosed());
    s1.awaitSubscribe();
    s1.awaitError();
    assertTrue(s1.nexts <= 1);
    assertEquals(1, s1.errors);
    s2.awaitSubscribe();
    s2.awaitError();
    assertTrue(s2.nexts <= 1);
    assertEquals(1, s2.errors);
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * Cancelling a subscription eventually causes no more onNexts to be issued
 */
public void testCancel() {
    SubmissionPublisher<Integer> p = basicPublisher();
    TestSubscriber s1 = new TestSubscriber();
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s1);
    p.subscribe(s2);
    s1.awaitSubscribe();
    p.submit(1);
    s1.sn.cancel();
    for (int i = 2; i <= 20; ++i)
        p.submit(i);
    p.close();
    s2.awaitComplete();
    assertEquals(20, s2.nexts);
    assertEquals(1, s2.completes);
    assertTrue(s1.nexts < 20);
    assertFalse(p.isSubscribed(s1));
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * Throwing an exception in onNext causes onError
 */
public void testThrowOnNext() {
    SubmissionPublisher<Integer> p = basicPublisher();
    TestSubscriber s1 = new TestSubscriber();
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s1);
    p.subscribe(s2);
    s1.awaitSubscribe();
    p.submit(1);
    s1.throwOnCall = true;
    p.submit(2);
    p.close();
    s2.awaitComplete();
    assertEquals(2, s2.nexts);
    s1.awaitComplete();
    assertEquals(1, s1.errors);
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * If a handler is supplied in constructor, it is invoked when
 * subscriber throws an exception in onNext
 */
public void testThrowOnNextHandler() {
    AtomicInteger calls = new AtomicInteger();
    SubmissionPublisher<Integer> p = new SubmissionPublisher<>(
        basicExecutor, 8, (s, e) -> calls.getAndIncrement());
    TestSubscriber s1 = new TestSubscriber();
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s1);
    p.subscribe(s2);
    s1.awaitSubscribe();
    p.submit(1);
    s1.throwOnCall = true;
    p.submit(2);
    p.close();
    s2.awaitComplete();
    assertEquals(2, s2.nexts);
    assertEquals(1, s2.completes);
    s1.awaitError();
    assertEquals(1, s1.errors);
    assertEquals(1, calls.get());
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * onNext items are issued in the same order to each subscriber
 */
public void testOrder() {
    SubmissionPublisher<Integer> p = basicPublisher();
    TestSubscriber s1 = new TestSubscriber();
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s1);
    p.subscribe(s2);
    for (int i = 1; i <= 20; ++i)
        p.submit(i);
    p.close();
    s2.awaitComplete();
    s1.awaitComplete();
    assertEquals(20, s2.nexts);
    assertEquals(1, s2.completes);
    assertEquals(20, s1.nexts);
    assertEquals(1, s1.completes);
}
 

import java.util.concurrent.SubmissionPublisher; //导入依赖的package包/类
/**
 * onNext is issued only if requested
 */
public void testRequest1() {
    SubmissionPublisher<Integer> p = basicPublisher();
    TestSubscriber s1 = new TestSubscriber();
    s1.request = false;
    p.subscribe(s1);
    s1.awaitSubscribe();
    assertEquals(0, p.estimateMinimumDemand());
    TestSubscriber s2 = new TestSubscriber();
    p.subscribe(s2);
    p.submit(1);
    p.submit(2);
    s2.awaitNext(1);
    assertEquals(0, s1.nexts);
    s1.sn.request(3);
    p.submit(3);
    p.close();
    s2.awaitComplete();
    assertEquals(3, s2.nexts);
    assertEquals(1, s2.completes);
    s1.awaitComplete();
    assertTrue(s1.nexts > 0);
    assertEquals(1, s1.completes);
}