/** Uso da interface funcional java.util.function.Supplier<T> Método principal: T get(); */
public static void exampleOfSupplier() {
// sintaxe simplificada chamando um método que executa uma operação e
// retorna um objeto T
Supplier<Integer> supplier = LambdaAPI::sum;
Integer result = supplier.get();
print(result.toString());
// sintaxe com código que executa uma operação em uma linha que retorna
// ou resulta em um objeto T
supplier = () -> 1;
result += supplier.get();
print(result.toString());
// outra sintaxe para a mesma operação, agora com bloco de código
// e instrução de retorno
supplier =
() -> {
int x = 1;
return x;
};
result += supplier.get();
print(result.toString());
// Observe que o método T get() não recebe parâmetros, sendo assim, se utilizar
// um método com parâmetros ou informar algum parâmetro, o código não compila
// supplier = LambdaAPI::print;
// supplier = (Integer param) -> 10 + 5;
// se o retorno da operação get() na expressão lambda não for igual o retorno
// esperado, o código não compila
// supplier = () -> "" + 1;
}
public void debug(String msg, Supplier<Object> arg1, Supplier<Object> arg2) {
if (!isDebugEnabled()) {
return;
}
log.debug(msg, arg1.get(), arg2.get());
}
/**
* Look-up the value through the cache. This always evaluates the {@code subKeyFactory} function
* and optionally evaluates {@code valueFactory} function if there is no entry in the cache for
* given pair of (key, subKey) or the entry has already been cleared.
*
* @param key possibly null key
* @param parameter parameter used together with key to create sub-key and value (should not be
* null)
* @return the cached value (never null)
* @throws NullPointerException if {@code parameter} passed in or {@code sub-key} calculated by
* {@code subKeyFactory} or {@code value} calculated by {@code valueFactory} is null.
*/
public V get(K key, P parameter) {
Objects.requireNonNull(parameter);
expungeStaleEntries();
Object cacheKey = CacheKey.valueOf(key, refQueue);
// lazily install the 2nd level valuesMap for the particular cacheKey
ConcurrentMap<Object, Supplier<V>> valuesMap = map.get(cacheKey);
if (valuesMap == null) {
ConcurrentMap<Object, Supplier<V>> oldValuesMap =
map.putIfAbsent(cacheKey, valuesMap = new ConcurrentHashMap<>());
if (oldValuesMap != null) {
valuesMap = oldValuesMap;
}
}
// create subKey and retrieve the possible Supplier<V> stored by that
// subKey from valuesMap
Object subKey = Objects.requireNonNull(subKeyFactory.apply(key, parameter));
Supplier<V> supplier = valuesMap.get(subKey);
Factory factory = null;
while (true) {
if (supplier != null) {
// supplier might be a Factory or a CacheValue<V> instance
V value = supplier.get();
if (value != null) {
return value;
}
}
// else no supplier in cache
// or a supplier that returned null (could be a cleared CacheValue
// or a Factory that wasn't successful in installing the CacheValue)
// lazily construct a Factory
if (factory == null) {
factory = new Factory(key, parameter, subKey, valuesMap);
}
if (supplier == null) {
supplier = valuesMap.putIfAbsent(subKey, factory);
if (supplier == null) {
// successfully installed Factory
supplier = factory;
}
// else retry with winning supplier
} else {
if (valuesMap.replace(subKey, supplier, factory)) {
// successfully replaced
// cleared CacheEntry / unsuccessful Factory
// with our Factory
supplier = factory;
} else {
// retry with current supplier
supplier = valuesMap.get(subKey);
}
}
}
}
public static SearchSortValues createTestItem() {
List<Supplier<Object>> valueSuppliers = new ArrayList<>();
// this should reflect all values that are allowed to go through the transport layer
valueSuppliers.add(() -> null);
valueSuppliers.add(() -> randomInt());
valueSuppliers.add(() -> randomLong());
valueSuppliers.add(() -> randomDouble());
valueSuppliers.add(() -> randomFloat());
valueSuppliers.add(() -> randomByte());
valueSuppliers.add(() -> randomShort());
valueSuppliers.add(() -> randomBoolean());
valueSuppliers.add(
() ->
frequently()
? randomAsciiOfLengthBetween(1, 30)
: randomRealisticUnicodeOfCodepointLength(30));
int size = randomInt(20);
Object[] values = new Object[size];
for (int i = 0; i < size; i++) {
Supplier<Object> supplier = randomFrom(valueSuppliers);
values[i] = supplier.get();
}
return new SearchSortValues(values);
}
/** Calls the given {@link Supplier} while flagged as replicating remote events. */
public static <T> T asReplicating(final Supplier<T> supplier) {
if (isReplicating()) {
return supplier.get();
} else {
isReplicating.set(TRUE);
try {
return supplier.get();
} finally {
isReplicating.remove();
}
}
}
@Test
public void shouldReturnSuccess() {
// Given
CircuitBreakerRegistry circuitBreakerRegistry = CircuitBreakerRegistry.ofDefaults();
CircuitBreaker circuitBreaker = circuitBreakerRegistry.circuitBreaker("testName");
assertThat(circuitBreaker.getState()).isEqualTo(CircuitBreaker.State.CLOSED);
// When
Supplier<String> checkedSupplier =
CircuitBreaker.decorateSupplier(() -> "Hello world", circuitBreaker);
// Then
assertThat(checkedSupplier.get()).isEqualTo("Hello world");
}
private static List<CatchExceptionTest> createTests(int argsCount, int catchDrops) {
if (catchDrops > argsCount || argsCount < 0 || catchDrops < 0) {
throw new IllegalArgumentException(
"argsCount = " + argsCount + ", catchDrops = " + catchDrops);
}
List<CatchExceptionTest> result = new ArrayList<>(TestCase.CONSTRUCTORS.size());
for (Supplier<TestCase> constructor : TestCase.CONSTRUCTORS) {
result.add(
new CatchExceptionTest(constructor.get(), /* isVararg = */ true, argsCount, catchDrops));
result.add(
new CatchExceptionTest(constructor.get(), /* isVararg = */ false, argsCount, catchDrops));
}
return result;
}
private void set(Supplier<T> result, int index) {
try {
Object current = result.get();
final Object use = current;
if (index < pipeline.functions.length) {
Function op = pipeline.functions[index];
this.pipeline.executors[index].execute(
() -> {
set(() -> (T) op.apply(use), index + 1);
});
return;
}
this.result.lazySet(current);
done();
} catch (Throwable t) {
if (t instanceof CompletedException) {
if (this.doFinally != null) doFinally.accept(this);
}
completeExceptionally(t);
}
}
/**
* Asserts that arguments can be resolved from lambda expressions for simple functional
* interfaces.
*/
public void shouldResolveArguments() {
Predicate<String> predicate = str -> true;
Function<String, Integer> fn = str -> Integer.valueOf(str);
Supplier<String> supplier = () -> "test";
Consumer<String> consumer = s -> {};
assertEquals(
TypeResolver.resolveRawArgument(Predicate.class, predicate.getClass()), String.class);
assertEquals(
TypeResolver.resolveRawArguments(Function.class, fn.getClass()),
new Class<?>[] {String.class, Integer.class});
assertEquals(
TypeResolver.resolveRawArgument(Supplier.class, supplier.getClass()), String.class);
assertEquals(
TypeResolver.resolveRawArgument(Consumer.class, consumer.getClass()), String.class);
}
@Override
public Element findElement(Supplier<By> by) {
Element element = new Element(super.findElement(by.get()));
element.setSearchContext(this);
element.setLocator((ExplicitWait e) -> this.untilFound2(by));
return element;
}
@Override
public HttpServerAuthenticationMechanism createAuthenticationMechanism(
String mechanismName, Map<String, ?> properties, CallbackHandler callbackHandler) {
for (Provider current : providers.get()) {
Set<Service> services = current.getServices();
if (services != null) {
for (Service currentService : services) {
if (SERVICE_TYPE.equals(currentService.getType())) {
try {
HttpServerAuthenticationMechanismFactory factory =
(HttpServerAuthenticationMechanismFactory) currentService.newInstance(null);
HttpServerAuthenticationMechanism mechanism =
factory.createAuthenticationMechanism(mechanismName, properties, callbackHandler);
if (mechanism != null) {
return mechanism;
}
} catch (NoSuchAlgorithmException e) {
log.debug(e);
}
}
}
}
}
return null;
}
/** Return the beanCache creating it if necessary. */
private ServerCache getBeanCache() {
if (beanCache == null) {
throw new IllegalStateException(
"No bean cache enabled for " + desc + ". Add the @Cache annotation.");
}
return beanCache.get();
}
private void performOnReplicas(ShardId primaryId, ReplicaRequest replicaRequest) {
// we have to get a new state after successfully indexing into the primary in order to honour
// recovery semantics.
// we have to make sure that every operation indexed into the primary after recovery start will
// also be replicated
// to the recovery target. If we use an old cluster state, we may miss a relocation that has
// started since then.
// If the index gets deleted after primary operation, we skip replication
final List<ShardRouting> shards = getShards(primaryId, clusterStateSupplier.get());
final String localNodeId = primary.routingEntry().currentNodeId();
for (final ShardRouting shard : shards) {
if (executeOnReplicas == false || shard.unassigned()) {
if (shard.primary() == false) {
totalShards.incrementAndGet();
}
continue;
}
if (shard.currentNodeId().equals(localNodeId) == false) {
performOnReplica(shard, replicaRequest);
}
if (shard.relocating() && shard.relocatingNodeId().equals(localNodeId) == false) {
performOnReplica(shard.buildTargetRelocatingShard(), replicaRequest);
}
}
}
@Override
public BinaryContent transform(Metacard metacard, Map<String, Serializable> arguments)
throws CatalogTransformerException {
StringWriter stringWriter = new StringWriter();
Boolean omitXmlDec = null;
if (MapUtils.isNotEmpty(arguments)) {
omitXmlDec = (Boolean) arguments.get(CswConstants.OMIT_XML_DECLARATION);
}
if (omitXmlDec == null || !omitXmlDec) {
stringWriter.append("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n");
}
PrettyPrintWriter writer = new PrettyPrintWriter(stringWriter, new NoNameCoder());
MarshallingContext context = new TreeMarshaller(writer, null, null);
copyArgumentsToContext(context, arguments);
converterSupplier.get().marshal(metacard, writer, context);
ByteArrayInputStream bais =
new ByteArrayInputStream(stringWriter.toString().getBytes(StandardCharsets.UTF_8));
return new BinaryContentImpl(bais, new MimeType());
}
/** Test method for {@link FailureReport#continueWith()}. */
@Test
public void continueWith() {
final FailureReport<String> failReport = new FailureReport<>();
final Runnable runTest = mock(Runnable.class);
failReport.continueWith(runTest);
assertThat(failReport.getContinueRoutine().get(), is(nullValue()));
verify(runTest).run();
@SuppressWarnings("unchecked")
final Supplier<Object> continueTest = mock(Supplier.class);
final Object returned = mock(Object.class);
final FailureReport<Object> failReport2 = new FailureReport<>();
failReport2.continueWith(continueTest);
given(continueTest.get()).willReturn(returned);
assertThat(failReport2.getContinueRoutine().get(), is(theInstance(returned)));
}
public Stream<FieldInfo> getFieldStream() {
return type.get()
.getMembers()
.stream()
.filter(x -> x instanceof FieldDeclaration)
.map(x -> new FieldDeclarationWrapper((FieldDeclaration) x));
}
/**
* Build a random search request.
*
* @param randomSearchSourceBuilder builds a random {@link SearchSourceBuilder}. You can use
* {@link #randomSearchSourceBuilder(Supplier, Supplier, Supplier, Supplier)}.
*/
public static SearchRequest randomSearchRequest(
Supplier<SearchSourceBuilder> randomSearchSourceBuilder) throws IOException {
SearchRequest searchRequest = new SearchRequest();
if (randomBoolean()) {
searchRequest.indices(generateRandomStringArray(10, 10, false, false));
}
if (randomBoolean()) {
searchRequest.indicesOptions(
IndicesOptions.fromOptions(
randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean()));
}
if (randomBoolean()) {
searchRequest.types(generateRandomStringArray(10, 10, false, false));
}
if (randomBoolean()) {
searchRequest.preference(randomAsciiOfLengthBetween(3, 10));
}
if (randomBoolean()) {
searchRequest.requestCache(randomBoolean());
}
if (randomBoolean()) {
searchRequest.routing(randomAsciiOfLengthBetween(3, 10));
}
if (randomBoolean()) {
searchRequest.scroll(randomPositiveTimeValue());
}
if (randomBoolean()) {
searchRequest.searchType(randomFrom(SearchType.values()));
}
if (randomBoolean()) {
searchRequest.source(randomSearchSourceBuilder.get());
}
return searchRequest;
}
/** TODO: Documentation */
default <E extends Throwable> T orThrow(final Supplier<E> exceptionSupplier) throws E {
if (this.isPresent()) {
return this.get();
} else {
throw exceptionSupplier.get();
}
}
public Stream<MethodInfo> getMethodStream() {
return type.get()
.getMembers()
.stream()
.map(this::getMethodInfoWrapper)
.filter(Objects::nonNull);
}
@Override
public Builder add(Supplier<InvalidateMethodContribution> supplier) {
Objects.requireNonNull(supplier);
InvalidateMethodContribution contribution = supplier.get();
Objects.requireNonNull(contribution, "Provided supplier returned null.");
list.add(contribution);
return this;
}
/** Clear the bean cache. */
void beanCacheClear() {
if (beanCache != null) {
if (beanLog.isDebugEnabled()) {
beanLog.debug(" CLEAR {}", cacheName);
}
beanCache.get().clear();
}
}
public ServiceDiscovery getServiceDiscovery() {
if (serviceDiscovery == null) {
if (serviceDiscoverySupplier != null) {
serviceDiscovery = serviceDiscoverySupplier.get();
}
}
return serviceDiscovery;
}
@Override
public List<Type> getInterfaceTypes() {
return type.get()
.getImplements()
.stream()
.map(getContext()::resolve)
.collect(Collectors.toList());
}
@Override
public Type getSuperType() {
val extends_ = type.get().getExtends();
if (extends_ == null || extends_.isEmpty()) return null;
return getContext().resolve(extends_.get(0));
}
public static <T> Optional<T> resolve(Supplier<T> resolver) {
try {
T result = resolver.get();
return Optional.ofNullable(result);
} catch (NullPointerException e) {
return Optional.empty();
}
}
/** Clear the query cache. */
void queryCacheClear() {
if (queryCache != null) {
if (queryLog.isDebugEnabled()) {
queryLog.debug(" CLEAR {}", cacheName);
}
queryCache.get().clear();
}
}
@Override
public void draw(Drawing context) {
all = new LinkedHashSet<>();
this.breadthFirst(this.both())
.forEach(
x -> {
Rect r = x.properties.get(frame);
{
Map<String, Function<Box, FLine>> drawing =
x.properties.computeIfAbsent(interactiveDrawing, k -> new LinkedHashMap<>());
if (drawing != null && drawing.size() > 0) {
Iterator<Function<Box, FLine>> it = drawing.values().iterator();
while (it.hasNext()) {
Function<Box, FLine> f = it.next();
FLine fl = f.apply(x);
if (fl == null) it.remove();
else all.add(fl);
}
}
}
{
Map<String, Supplier<FLine>> drawing =
x.properties.computeIfAbsent(
interactiveLines, k -> new LinkedHashMapAndArrayList<>());
if (drawing != null && drawing.size() > 0) {
Iterator<Supplier<FLine>> it = drawing.values().iterator();
while (it.hasNext()) {
Supplier<FLine> f = it.next();
FLine fl = f.get();
if (fl == null) it.remove();
else all.add(fl);
}
}
}
});
for (FLine f : all)
f.attributes.computeIfAbsent(
projectedArea,
(k) ->
new Cached<FLine, Object, Area>(
(fline, previously) -> projectFLineToArea(fline),
(fline) -> new Object[] {fline, fline.getModCount()}));
}
public static <T> CompletableFuture<T> toCompletableFuture(final Supplier<T> supplier) {
CompletableFuture<T> future = new CompletableFuture<T>();
try {
future.complete(supplier.get());
} catch (RuntimeException e) {
future.completeExceptionally(e);
}
return future;
}
@Override
public void setName(String name) {
String packageName = getPackageName();
if (name.startsWith(packageName)) {
type.get().setName(name.replace(packageName, ""));
} else {
throw new TransformationException("Name '" + name + "' must be in package: " + packageName);
}
}
@Override
public AttributesMap map(ResultSet rs) throws SQLException {
AttributesMap.Builder attributes = attributeMapBuilderSupplier.get();
Iterator<AttributeMapper<?>> mapperIter = applicableMappers(rs.getMetaData()).iterator();
while (mapperIter.hasNext()) {
attributes.and(mapperIter.next().attributeAndValue(rs));
}
return attributes.build();
}
