Examples with UncheckedExecutionException com.google.common.util.concurrent.UncheckedExecutionException used on opensource projects

Example 81 with UncheckedExecutionException

use of com.google.common.util.concurrent.UncheckedExecutionException in project guava by hceylan.

the class LocalCache method loadAll.

/**
 * Returns the result of calling {@link CacheLoader#loadAll}, or null if {@code loader} doesn't
 * implement {@code loadAll}.
 */
@Nullable
Map<K, V> loadAll(Set<? extends K> keys, CacheLoader<? super K, V> loader) throws ExecutionException {
    Stopwatch stopwatch = new Stopwatch().start();
    Map<K, V> result;
    boolean success = false;
    try {
        // safe since all keys extend K
        @SuppressWarnings("unchecked") Map<K, V> map = (Map<K, V>) loader.loadAll(keys);
        result = map;
        success = true;
    } catch (UnsupportedLoadingOperationException e) {
        success = true;
        throw e;
    } catch (RuntimeException e) {
        throw new UncheckedExecutionException(e);
    } catch (Exception e) {
        throw new ExecutionException(e);
    } catch (Error e) {
        throw new ExecutionError(e);
    } finally {
        if (!success) {
            globalStatsCounter.recordLoadException(stopwatch.elapsedTime(NANOSECONDS));
        }
    }
    if (result == null) {
        globalStatsCounter.recordLoadException(stopwatch.elapsedTime(NANOSECONDS));
        throw new InvalidCacheLoadException(loader + " returned null map from loadAll");
    }
    stopwatch.stop();
    // TODO(fry): batch by segment
    boolean nullsPresent = false;
    for (Map.Entry<K, V> entry : result.entrySet()) {
        K key = entry.getKey();
        V value = entry.getValue();
        if (key == null || value == null) {
            // delay failure until non-null entries are stored
            nullsPresent = true;
        } else {
            put(key, value);
        }
    }
    if (nullsPresent) {
        globalStatsCounter.recordLoadException(stopwatch.elapsedTime(NANOSECONDS));
        throw new InvalidCacheLoadException(loader + " returned null keys or values from loadAll");
    }
    // TODO(fry): record count of loaded entries
    globalStatsCounter.recordLoadSuccess(stopwatch.elapsedTime(NANOSECONDS));
    return result;
}

Example 82 with UncheckedExecutionException

use of com.google.common.util.concurrent.UncheckedExecutionException in project guava by google.

the class LocalCache method load.

// timestamps as numeric primitives
@SuppressWarnings("GoodTime")
private V load(Object key) throws ExecutionException {
    long startTime = ticker.read();
    V calculatedValue;
    try {
        /*
       * This cast isn't safe, but we can rely on the fact that K is almost always passed to
       * Map.get(), and tools like IDEs and Findbugs can catch situations where this isn't the
       * case.
       *
       * The alternative is to add an overloaded method, but the chances of a user calling get()
       * instead of the new API and the risks inherent in adding a new API outweigh this little
       * hole.
       */
        K castKey = (K) key;
        calculatedValue = loader.load(castKey);
        put(castKey, calculatedValue);
    } catch (RuntimeException e) {
        statsCounter.recordLoadException(ticker.read() - startTime);
        throw new UncheckedExecutionException(e);
    } catch (Exception e) {
        statsCounter.recordLoadException(ticker.read() - startTime);
        throw new ExecutionException(e);
    } catch (Error e) {
        statsCounter.recordLoadException(ticker.read() - startTime);
        throw new ExecutionError(e);
    }
    if (calculatedValue == null) {
        String message = loader + " returned null for key " + key + ".";
        throw new CacheLoader.InvalidCacheLoadException(message);
    }
    statsCounter.recordLoadSuccess(ticker.read() - startTime);
    return calculatedValue;
}

Example 83 with UncheckedExecutionException

use of com.google.common.util.concurrent.UncheckedExecutionException in project guava by google.

the class CacheLoadingTest method testLoadUncheckedException.

public void testLoadUncheckedException() throws ExecutionException {
    Exception e = new RuntimeException();
    CacheLoader<Object, Object> loader = exceptionLoader(e);
    LoadingCache<Object, Object> cache = CacheBuilder.newBuilder().recordStats().build(loader);
    CacheStats stats = cache.stats();
    assertEquals(0, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(0, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    try {
        cache.get(new Object());
        fail();
    } catch (UncheckedExecutionException expected) {
        assertThat(expected).hasCauseThat().isSameInstanceAs(e);
    }
    stats = cache.stats();
    assertEquals(1, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(1, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    try {
        cache.getUnchecked(new Object());
        fail();
    } catch (UncheckedExecutionException expected) {
        assertThat(expected).hasCauseThat().isSameInstanceAs(e);
    }
    stats = cache.stats();
    assertEquals(2, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(2, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    cache.refresh(new Object());
    checkLoggedCause(e);
    stats = cache.stats();
    assertEquals(2, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(3, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    Exception callableException = new RuntimeException();
    try {
        cache.get(new Object(), throwing(callableException));
        fail();
    } catch (UncheckedExecutionException expected) {
        assertThat(expected).hasCauseThat().isSameInstanceAs(callableException);
    }
    stats = cache.stats();
    assertEquals(3, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(4, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
    try {
        cache.getAll(asList(new Object()));
        fail();
    } catch (UncheckedExecutionException expected) {
        assertThat(expected).hasCauseThat().isSameInstanceAs(e);
    }
    stats = cache.stats();
    assertEquals(4, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(5, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());
}

Example 84 with UncheckedExecutionException

use of com.google.common.util.concurrent.UncheckedExecutionException in project guava by google.

the class CacheLoadingTest method testConcurrentLoadingCheckedException.

/**
 * On a concurrent computation that throws a checked exception, all threads should get the
 * (wrapped) exception, with the loader called only once. The result should not be cached (a later
 * request should call the loader again).
 */
private static void testConcurrentLoadingCheckedException(CacheBuilder<Object, Object> builder) throws InterruptedException {
    int count = 10;
    final AtomicInteger callCount = new AtomicInteger();
    final CountDownLatch startSignal = new CountDownLatch(count + 1);
    final IOException e = new IOException();
    LoadingCache<String, String> cache = builder.build(new CacheLoader<String, String>() {

        @Override
        public String load(String key) throws IOException, InterruptedException {
            callCount.incrementAndGet();
            startSignal.await();
            throw e;
        }
    });
    List<Object> result = doConcurrentGet(cache, "bar", count, startSignal);
    assertEquals(1, callCount.get());
    for (int i = 0; i < count; i++) {
        // doConcurrentGet alternates between calling getUnchecked and calling get. If we call get(),
        // we should get an ExecutionException; if we call getUnchecked(), we should get an
        // UncheckedExecutionException.
        int mod = i % 3;
        if (mod == 0 || mod == 2) {
            assertThat(result.get(i)).isInstanceOf(ExecutionException.class);
            assertThat((ExecutionException) result.get(i)).hasCauseThat().isSameInstanceAs(e);
        } else {
            assertThat(result.get(i)).isInstanceOf(UncheckedExecutionException.class);
            assertThat((UncheckedExecutionException) result.get(i)).hasCauseThat().isSameInstanceAs(e);
        }
    }
    // subsequent calls should call the loader again, not get the old exception
    try {
        cache.getUnchecked("bar");
        fail();
    } catch (UncheckedExecutionException expected) {
    }
    assertEquals(2, callCount.get());
}

Example 85 with UncheckedExecutionException

use of com.google.common.util.concurrent.UncheckedExecutionException in project guava by google.

the class CacheLoadingTest method testConcurrentLoadingUncheckedException.

/**
 * On a concurrent computation that throws an unchecked exception, all threads should get the
 * (wrapped) exception, with the loader called only once. The result should not be cached (a later
 * request should call the loader again).
 */
private static void testConcurrentLoadingUncheckedException(CacheBuilder<Object, Object> builder) throws InterruptedException {
    int count = 10;
    final AtomicInteger callCount = new AtomicInteger();
    final CountDownLatch startSignal = new CountDownLatch(count + 1);
    final RuntimeException e = new RuntimeException();
    LoadingCache<String, String> cache = builder.build(new CacheLoader<String, String>() {

        @Override
        public String load(String key) throws InterruptedException {
            callCount.incrementAndGet();
            startSignal.await();
            throw e;
        }
    });
    List<Object> result = doConcurrentGet(cache, "bar", count, startSignal);
    assertEquals(1, callCount.get());
    for (int i = 0; i < count; i++) {
        // doConcurrentGet alternates between calling getUnchecked and calling get, but an unchecked
        // exception thrown by the loader is always wrapped as an UncheckedExecutionException.
        assertThat(result.get(i)).isInstanceOf(UncheckedExecutionException.class);
        assertThat(((UncheckedExecutionException) result.get(i))).hasCauseThat().isSameInstanceAs(e);
    }
    // subsequent calls should call the loader again, not get the old exception
    try {
        cache.getUnchecked("bar");
        fail();
    } catch (UncheckedExecutionException expected) {
    }
    assertEquals(2, callCount.get());
}