Java ListeningExecutorService.shutdown方法代碼示例

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Test
public void testConcurrentFetchTasks() throws Exception {
  // Test for regression of AURORA-1625
  ListeningExecutorService executor =
      MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(5));
  assertStoreContents();
  saveTasks(TASK_A, TASK_B, TASK_C, TASK_D);

  List<ListenableFuture<Integer>> futures = Lists.newArrayList();

  for (int i = 0; i < 100; i++) {
    futures.add(executor.submit(() -> Iterables.size(fetchTasks(Query.unscoped()))));
  }

  Future<List<Integer>> f = Futures.allAsList(futures);

  executor.shutdown();
  executor.awaitTermination(1, TimeUnit.MINUTES);

  assertEquals(Iterables.getOnlyElement(ImmutableSet.copyOf(f.get())), (Integer) 4);
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
private void shutdown(@Nullable final ListeningExecutorService executorService) {
    if (executorService != null) {
        executorService.shutdown();
        try {
            // Wait a while for existing tasks to terminate
            if (!executorService.awaitTermination(60, TimeUnit.SECONDS)) {
                executorService.shutdownNow(); // Cancel currently executing tasks
                // Wait a while for tasks to respond to being cancelled
                if (!executorService.awaitTermination(60, TimeUnit.SECONDS)) {
                    log.warn("Thread pool for metacat refresh did not terminate");
                }
            }
        } catch (InterruptedException ie) {
            // (Re-)Cancel if current thread also interrupted
            executorService.shutdownNow();
            // Preserve interrupt status
            Thread.currentThread().interrupt();
        }
    }
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
/**
 * Counts yield and q30 of fastqs in the fastqsPerSample multimap, using 1 thread per file.
 * The yield and q30 of the Undetermined sample will count towards the total yield and q30 of the flowcell.
 *
 * @param fastqsPerSample multimap of sampleName and fastqs to process
 * @param threadCount     number of maximum threads
 * @return FastqTracker with yield and q30 stats for the fastqs processed.
 */

@NotNull
static FastqTracker processFastqs(@NotNull final Multimap<String, File> fastqsPerSample, final int threadCount)
        throws InterruptedException {
    LOGGER.info("Using " + threadCount + " threads. Processing " + fastqsPerSample.size() + " fastQ files.");
    final FastqTrackerWrapper tracker = new FastqTrackerWrapper();
    final ListeningExecutorService threadPool = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(threadCount));

    for (final String sampleName : fastqsPerSample.keySet()) {
        final Collection<File> fastqs = fastqsPerSample.get(sampleName);
        for (final File fastq : fastqs) {
            final String laneName = getLaneName(fastq);
            final ListenableFuture<FastqData> futureResult = threadPool.submit(() -> processFile(fastq));
            addCallback(futureResult, (data) -> tracker.addDataFromSampleFile(sampleName, laneName, data),
                    (error) -> LOGGER.error("Failed to process file: " + fastq.getName(), error));
        }
    }
    threadPool.shutdown();
    threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
    return tracker.tracker();
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Override
public void transactionMarker() throws Exception {
    ListeningExecutorService executor =
            MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
    ListenableFuture<Void> future1 = executor.submit(new Callable<Void>() {
        @Override
        public Void call() throws InterruptedException {
            Thread.sleep(100);
            return null;
        }
    });
    future1.addListener(new Runnable() {
        @Override
        public void run() {
            new CreateTraceEntry().traceEntryMarker();
        }
    }, executor);
    Thread.sleep(200);
    executor.shutdown();
    executor.awaitTermination(10, SECONDS);
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Benchmark
public void guava() throws Exception {
  final ExecutorService executor = Executors.newWorkStealingPool(THREAD_COUNT);
  final ListeningExecutorService listeningExecutor = MoreExecutors.listeningDecorator(executor);

  final List<ListenableFuture<Integer>> futures = new ArrayList<>();

  for (int i = 0; i < SIZE; i++) {
    final int current = i;

    futures.add(listeningExecutor.submit(() -> current));
  }

  int sum = 0;

  for (final ListenableFuture<Integer> future : futures) {
    sum += future.get();
  }

  if (sum != EXPECTED_SUM) {
    throw new IllegalStateException("did not properly collect all values");
  }

  listeningExecutor.shutdown();
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
public ListenableFuture<Transaction> sendCoins(final Address address, final Coin amount) {
    ExecutorService executor = Executors.newSingleThreadExecutor(bitcoinjThreadFactory);
    ListeningExecutorService sendCoinsExecutor = MoreExecutors.listeningDecorator(executor);
    ListenableFuture<Transaction> txFuture = sendCoinsExecutor.submit(new Callable<Transaction>() {
        @Override
        public Transaction call() throws Exception {
            BitcoinURI payment = new BitcoinURI(BitcoinURI.convertToBitcoinURI(address, amount, null, null));
            CLTVInstantPaymentStep step = new CLTVInstantPaymentStep(walletServiceBinder, payment);
            step.process(null);
            Transaction fullySignedTx = step.getTransaction();
            maybeCommitAndBroadcastTransaction(fullySignedTx);
            Log.i(TAG, "Send Coins - address=" + address + ", amount=" + amount
                    + ", txHash=" + fullySignedTx.getHashAsString());
            return fullySignedTx;
        }
    });
    sendCoinsExecutor.shutdown();
    Futures.addCallback(txFuture, new FutureCallback<Transaction>() {
        @Override
        public void onSuccess(Transaction result) {
            Log.i(TAG, "sendCoins - onSuccess - tx " + result.getHashAsString());
            broadcastInstantPaymentSuccess();
        }

        @Override
        public void onFailure(Throwable t) {
            Log.e(TAG, "sendCoins - onFailure - failed with the following throwable: ", t);
            broadcastInstantPaymentFailure();
        }
    });
    return txFuture;
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Override
public ImmutableMap<PreFlopHandType, IncomeRate> simulateRollout( ImmutableMap<PreFlopHandType, IncomeRate> handTypeToIncomeRate, double tolerance, PrintWriter printWriter, int iteration) throws Exception
{
    if(printWriter != null)
    {
        synchronized (printWriter)
        {
            printWriter.println("HandType, Income Rate, Error, SD, Iteration");
            printWriter.flush();
        }
    }

    ImmutableSortedSet<PreFlopHandType> preflopHands = adaptor.adaptDeck(deckFactory.build());

    ImmutableMap.Builder<PreFlopHandType, IncomeRate> newIncomeRateBuilder = ImmutableMap.builder();

    int numCores = Runtime.getRuntime().availableProcessors();

    ListeningExecutorService threadPool = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(numCores));

    for(PreFlopHandType handType : preflopHands)
    {
        IDeck deck = deckFactory.build();

        IncomeRateSimulationExecutor executor = new IncomeRateSimulationExecutor(handType, deck, handTypeToIncomeRate, tolerance, printWriter, iteration);

        ListenableFuture<IncomeRate> future = threadPool.submit(( Callable<IncomeRate>) executor );


    }

    threadPool.shutdown();
    threadPool.awaitTermination(1, TimeUnit.DAYS);

    return newIncomeRateBuilder.build();
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
private <T> ListenableFuture<T> callLightblueSvc(final Method method, final Object[] values, final FacadeOperation op, final MethodCallStringifier callStringifier) {
    ListeningExecutorService executor = createExecutor();
    try {
        // fetch from lightblue using future (asynchronously)
        final long parentThreadId = Thread.currentThread().getId();
        return executor.submit(new Callable<T>(){
            @Override
            public T call() throws Exception {
                Timer dest = new Timer("destination."+method.getName());
                if (sharedStore != null) {
                    sharedStore.copyFromThread(parentThreadId);
                }
                try {
                    return (T) method.invoke(lightblueSvc, values);
                } catch (Throwable t) {
                    if (shouldSource(op) && shouldCheckConsistency(op)) {
                        // swallow lightblue exception if legacy was called and consistency checker is on
                        log.warn("Lightblue call " + implementationName + "." + callStringifier + " threw an exception. Returning data from legacy.", t);
                        onExceptionSwallowed(t);
                        throw new SwallowableException(t, true);
                    } else {
                        // throw lightblue exception if legacy was not called or consistency checker is disabled
                        throw new SwallowableException(t, false);
                    }
                } finally {
                    long callTook = dest.complete();
                    long slowWarning = timeoutConfiguration.getSlowWarningMS(method.getName(), op);

                    if (callTook >= slowWarning) {
                        // call is slow; this will log even if source fails to respond
                        log.warn("Slow call warning: {}.{} took {}ms",implementationName, callStringifier.toString(), callTook);
                    }
                }
            }
        });

    } finally {
        executor.shutdown();
    }
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Test
public void fourKindsOfRequestAtOnce() throws Exception {
    RxGreeterGrpc.RxGreeterStub stub = RxGreeterGrpc.newRxStub(channel);

    // == MAKE REQUESTS ==
    // One to One
    Single<HelloRequest> req1 = Single.just(HelloRequest.newBuilder().setName("rxjava").build());
    Single<HelloResponse> resp1 = stub.sayHello(req1);

    // One to Many
    Single<HelloRequest> req2 = Single.just(HelloRequest.newBuilder().setName("rxjava").build());
    Flowable<HelloResponse> resp2 = stub.sayHelloRespStream(req2);

    // Many to One
    Flowable<HelloRequest> req3 = Flowable.just(
            HelloRequest.newBuilder().setName("a").build(),
            HelloRequest.newBuilder().setName("b").build(),
            HelloRequest.newBuilder().setName("c").build());

    Single<HelloResponse> resp3 = stub.sayHelloReqStream(req3);

    // Many to Many
    Flowable<HelloRequest> req4 = Flowable.just(
            HelloRequest.newBuilder().setName("a").build(),
            HelloRequest.newBuilder().setName("b").build(),
            HelloRequest.newBuilder().setName("c").build(),
            HelloRequest.newBuilder().setName("d").build(),
            HelloRequest.newBuilder().setName("e").build());

    Flowable<HelloResponse> resp4 = stub.sayHelloBothStream(req4);

    // == VERIFY RESPONSES ==
    ListeningExecutorService executorService = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());

    // Run all four verifications in parallel
    try {
        // One to One
        ListenableFuture<Boolean> oneToOne = executorService.submit(() -> {
            TestObserver<String> testObserver1 = resp1.map(HelloResponse::getMessage).test();
            testObserver1.awaitTerminalEvent(1, TimeUnit.SECONDS);
            testObserver1.assertValue("Hello rxjava");
            return true;
        });

        // One to Many
        ListenableFuture<Boolean> oneToMany = executorService.submit(() -> {
            TestSubscriber<String> testSubscriber1 = resp2.map(HelloResponse::getMessage).test();
            testSubscriber1.awaitTerminalEvent(1, TimeUnit.SECONDS);
            testSubscriber1.assertValues("Hello rxjava", "Hi rxjava", "Greetings rxjava");
            return true;
        });

        // Many to One
        ListenableFuture<Boolean> manyToOne = executorService.submit(() -> {
            TestObserver<String> testObserver2 = resp3.map(HelloResponse::getMessage).test();
            testObserver2.awaitTerminalEvent(1, TimeUnit.SECONDS);
            testObserver2.assertValue("Hello a and b and c");
            return true;
        });

        // Many to Many
        ListenableFuture<Boolean> manyToMany = executorService.submit(() -> {
            TestSubscriber<String> testSubscriber2 = resp4.map(HelloResponse::getMessage).test();
            testSubscriber2.awaitTerminalEvent(1, TimeUnit.SECONDS);
            testSubscriber2.assertValues("Hello a and b", "Hello c and d", "Hello e");
            testSubscriber2.assertComplete();
            return true;
        });

        ListenableFuture<List<Boolean>> allFutures = Futures.allAsList(Lists.newArrayList(oneToOne, oneToMany, manyToOne, manyToMany));
        // Block for response
        List<Boolean> results = allFutures.get(3, TimeUnit.SECONDS);
        assertThat(results).containsExactly(true, true, true, true);

    } finally {
        executorService.shutdown();
    }
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Test
public void fourKindsOfRequestAtOnce() throws Exception {
    StepVerifier.setDefaultTimeout(Duration.ofSeconds(3));

    ReactorGreeterGrpc.ReactorGreeterStub stub = ReactorGreeterGrpc.newReactorStub(channel);

    // == MAKE REQUESTS ==
    // One to One
    Mono<HelloRequest> req1 = Mono.just(HelloRequest.newBuilder().setName("reactorjava").build());
    Mono<HelloResponse> resp1 = stub.sayHello(req1);

    // One to Many
    Mono<HelloRequest> req2 = Mono.just(HelloRequest.newBuilder().setName("reactorjava").build());
    Flux<HelloResponse> resp2 = stub.sayHelloRespStream(req2);

    // Many to One
    Flux<HelloRequest> req3 = Flux.just(
            HelloRequest.newBuilder().setName("a").build(),
            HelloRequest.newBuilder().setName("b").build(),
            HelloRequest.newBuilder().setName("c").build());

    Mono<HelloResponse> resp3 = stub.sayHelloReqStream(req3);

    // Many to Many
    Flux<HelloRequest> req4 = Flux.just(
            HelloRequest.newBuilder().setName("a").build(),
            HelloRequest.newBuilder().setName("b").build(),
            HelloRequest.newBuilder().setName("c").build(),
            HelloRequest.newBuilder().setName("d").build(),
            HelloRequest.newBuilder().setName("e").build());

    Flux<HelloResponse> resp4 = stub.sayHelloBothStream(req4);

    // == VERIFY RESPONSES ==
    ListeningExecutorService executorService = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());

    // Run all four verifications in parallel
    try {
        // One to One
        ListenableFuture<Boolean> oneToOne = executorService.submit(() -> {
            StepVerifier.create(resp1.map(HelloResponse::getMessage))
                    .expectNext("Hello reactorjava")
                    .verifyComplete();
            return true;
        });

        // One to Many
        ListenableFuture<Boolean> oneToMany = executorService.submit(() -> {
            StepVerifier.create(resp2.map(HelloResponse::getMessage))
                    .expectNext("Hello reactorjava", "Hi reactorjava", "Greetings reactorjava")
                    .verifyComplete();
            return true;
        });

        // Many to One
        ListenableFuture<Boolean> manyToOne = executorService.submit(() -> {
            StepVerifier.create(resp3.map(HelloResponse::getMessage))
                    .expectNext("Hello a and b and c")
                    .verifyComplete();
            return true;
        });

        // Many to Many
        ListenableFuture<Boolean> manyToMany = executorService.submit(() -> {
            StepVerifier.create(resp4.map(HelloResponse::getMessage))
                    .expectNext("Hello a and b", "Hello c and d", "Hello e")
                    .verifyComplete();
            return true;
        });

        ListenableFuture<List<Boolean>> allFutures = Futures.allAsList(Lists.newArrayList(oneToOne, oneToMany, manyToOne, manyToMany));
        // Block for response
        List<Boolean> results = allFutures.get(3, TimeUnit.SECONDS);
        assertThat(results).containsExactly(true, true, true, true);

    } finally {
        executorService.shutdown();
    }
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
public ListenableFuture<Transaction> collectRefund(final Address sendTo) {
    /*
     * Bitcoin nodes consider the median time of the last couple of blocks when
     * comparing the nLockTime (BIP 113). The median time is behind the current
     * time (unix seconds). As a consequence, a transaction is not relayed
     * by the nodes even though the lock time expired, i.e. lockTime < currentTime.
     * The median lags behind ~1h. In other words, a transaction with lock time t should be
     * broadcasted not earlier than t+1h. Otherwise, the transaction must be re-broadcasted
     * and it takes a long time for the transaction to be included in a block.
     * - https://bitcoincore.org/en/releases/0.12.1/
     * - https://github.com/bitcoin/bips/blob/master/bip-0113.mediawiki
     */

    ExecutorService executor = Executors.newSingleThreadExecutor(bitcoinjThreadFactory);
    ListeningExecutorService collectRefundExecutor = MoreExecutors.listeningDecorator(executor);
    ListenableFuture<Transaction> txFuture = collectRefundExecutor.submit(new Callable<Transaction>() {
        @Override
        public Transaction call() throws Exception {
            final List<TransactionOutput> unlockedTxOut = getUnlockedUnspentOutputs();
            Transaction transaction = BitcoinUtils.createSpendAllTx(
                    getNetworkParameters(),
                    unlockedTxOut,
                    sendTo);

            // since we sign with 1 key (without server key), we need to set
            // the nLockTime and sequence number flags of CLTV inputs.
            Map<String, Long> timeLocksOfInputs = createLockTimeForInputsMap(transaction.getInputs());
            BitcoinUtils.setFlagsOfCLTVInputs(
                    transaction,
                    timeLocksOfInputs,
                    org.bitcoinj.core.Utils.currentTimeSeconds());

            // code is very similar to signTransaction, but we use a different scriptSig!
            final List<TransactionInput> inputs = transaction.getInputs();
            for (int i = 0; i < inputs.size(); ++i) {
                TransactionInput txIn = inputs.get(i);
                TransactionOutput prevTxOut = txIn.getConnectedOutput();
                byte[] sentToHash = prevTxOut.getScriptPubKey().getPubKeyHash();
                TimeLockedAddress tla = findTimeLockedAddressByHash(sentToHash);
                if (tla == null) {
                    throw new CoinbleskException(String.format(Locale.US,
                            "Signing error: did not find redeem script for input: %s, ", txIn));
                }
                byte[] redeemScript = tla.createRedeemScript().getProgram();
                TransactionSignature signature = transaction.calculateSignature(
                        i, multisigClientKey, redeemScript, Transaction.SigHash.ALL, false);

                Script scriptSig = tla.createScriptSigAfterLockTime(signature);
                txIn.setScriptSig(scriptSig);
            }

            BitcoinUtils.verifyTxFull(transaction);
            commitAndBroadcastTransaction(transaction);
            Coin amount = transaction.getOutputSum();
            Log.i(TAG, "Collect Refund - address=" + sendTo + ", amount=" + amount
                    + ", txHash=" + transaction.getHashAsString());
            return transaction;
        }
    });
    collectRefundExecutor.shutdown();
    Futures.addCallback(txFuture, new FutureCallback<Transaction>() {
        @Override
        public void onSuccess(Transaction result) {
            Log.i(TAG, "collectRefund - onSuccess - tx " + result.getHashAsString());
            broadcastInstantPaymentSuccess();
        }

        @Override
        public void onFailure(Throwable t) {
            Log.e(TAG, "collectRefund - onFailure - failed with the following throwable: ", t);
            broadcastInstantPaymentFailure();
        }
    });
    return txFuture;
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
public static TasmoServiceHandle<ReadMaterializerViewFields> initialize(TasmoReadMaterializerConfig config,
    TasmoViewModel tasmoViewModel,
    WrittenEventProvider writtenEventProvider,
    TasmoStorageProvider tasmoStorageProvider) throws Exception {

    ConcurrencyStore concurrencyStore = new HBaseBackedConcurrencyStore(tasmoStorageProvider.concurrencyStorage());
    ReferenceStore referenceStore = new ReferenceStore(concurrencyStore,
        tasmoStorageProvider.multiLinksStorage(),
        tasmoStorageProvider.multiBackLinksStorage());

    // TODO add config option to switch between batching and serial.
    ReferenceTraverser referenceTraverser = new SerialReferenceTraverser(referenceStore);
    EventValueStore eventValueStore = new EventValueStore(concurrencyStore, tasmoStorageProvider.eventStorage());
    FieldValueReader fieldValueReader = new EventValueStoreFieldValueReader(eventValueStore);

    ThreadFactory eventProcessorThreadFactory = new ThreadFactoryBuilder()
        .setNameFormat("view-read-materialization-processor-%d")
        .setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
            @Override
            public void uncaughtException(Thread t, Throwable e) {
                LOG.error("Thread " + t.getName() + " threw uncaught exception", e);
            }
        })
        .build();

    ExecutorService processorThreads = Executors.newFixedThreadPool(config.getNumberOfViewRequestProcessorThreads(), eventProcessorThreadFactory);
    final ListeningExecutorService listeningDecorator = MoreExecutors.listeningDecorator(processorThreads);

    final ReadMaterializerViewFields readMaterializer = new ReadMaterializerViewFields(referenceTraverser,
        fieldValueReader, concurrencyStore, tasmoViewModel, listeningDecorator);

    return new TasmoServiceHandle<ReadMaterializerViewFields>() {

        @Override
        public ReadMaterializerViewFields getService() {
            return readMaterializer;
        }

        @Override
        public void start() throws Exception {
        }

        @Override
        public void stop() throws Exception {
            listeningDecorator.shutdown();
        }
    };
}
 

import com.google.common.util.concurrent.ListeningExecutorService; //導入方法依賴的package包/類
@Benchmark
public void completable() throws Exception {
  final ExecutorService executor = Executors.newFixedThreadPool(THREAD_COUNT);
  final ListeningExecutorService listeningExecutor = MoreExecutors.listeningDecorator(executor);

  final AtomicInteger sum = new AtomicInteger();
  final CountDownLatch latch = new CountDownLatch(1);
  final CountDownLatch tasks = new CountDownLatch(CALLBACK_COUNT * SIZE);

  final FutureCallback<Integer> callback = new FutureCallback<Integer>() {
    @Override
    public void onSuccess(Integer result) {
      sum.addAndGet(result);
      tasks.countDown();
    }

    @Override
    public void onFailure(Throwable t) {
    }
  };

  for (int i = 0; i < SIZE; i++) {
    final int current = i;

    final ListenableFuture<Integer> future = listeningExecutor.submit(() -> {
      latch.await();
      return current;
    });

    for (int c = 0; c < CALLBACK_COUNT; c++) {
      com.google.common.util.concurrent.Futures.addCallback(future, callback);
    }
  }

  latch.countDown();
  tasks.await(1, TimeUnit.SECONDS);

  if (sum.get() != EXPECTED_SUM) {
    throw new IllegalStateException(
        String.format("did not properly collect all values: expected %d, but was %d",
            EXPECTED_SUM, sum.get()));
  }

  listeningExecutor.shutdown();
}