/**
* Main method of the example
*
* @param args
*/
public static void main(String[] args) {
// Generate an array of 1000 integers
ArrayGenerator generator = new ArrayGenerator();
int array[] = generator.generateArray(1000);
// Create a TaskManager object
TaskManager manager = new TaskManager();
// Create a ForkJoinPool with the default constructor
ForkJoinPool pool = new ForkJoinPool();
// Create a Task to process the array
SearchNumberTask task = new SearchNumberTask(array, 0, 1000, 5, manager);
// Execute the task
pool.execute(task);
// Shutdown the pool
pool.shutdown();
// Wait for the finalization of the task
try {
pool.awaitTermination(1, TimeUnit.DAYS);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Write a message to indicate the end of the program
System.out.printf("Main: The program has finished\n");
}
public static void main(String[] args) throws Exception {
// 8、创建ForkJoinPool对象
ForkJoinPool pool = new ForkJoinPool();
// 9、创建元素有10000个的int数组
int array[] = new int[10000];
// 10、创建一个新的任务，处理整个数组
Task task1 = new Task(array, 0, array.length);
// 11、使用execute()方法将任务发给pool执行，
pool.execute(task1);
// 12、当任务未结束时，调用showLog()方法输出ForkJoinPool类的状态信息，并使线程睡眠1秒
while (!task1.isDone()) {
showLog(pool);
TimeUnit.SECONDS.sleep(1);
}
// 13、使用shutDown()y方法关闭pool
pool.shutdown();
// 14、使用awaitTermination()方法等待pool结束
pool.awaitTermination(1, TimeUnit.DAYS);
// 15、调用showLog()方法，输出ForkJoinPool类的状态信息，并输出程序执行结束的信息
showLog(pool);
System.out.printf("Main: End of the program.\n");
}
/** Pool maintains parallelism when using ManagedBlocker */
public void testBlockingForkJoinTask() throws Throwable {
ForkJoinPool p = new ForkJoinPool(4);
try {
ReentrantLock lock = new ReentrantLock();
ManagedLocker locker = new ManagedLocker(lock);
ForkJoinTask<Integer> f = new LockingFibTask(20, locker, lock);
p.execute(f);
assertEquals(6765, (int) f.get());
} finally {
p.shutdownNow(); // don't wait out shutdown
}
}
/**
* Main method of the example
*
* @param args
*/
public static void main(String[] args) {
// Create a list of products
ProductListGenerator generator = new ProductListGenerator();
List<Product> products = generator.generate(10000);
// Craete a task
Task task = new Task(products, 0, products.size(), 0.20);
// Create a ForkJoinPool
ForkJoinPool pool = new ForkJoinPool();
// Execute the Task
pool.execute(task);
// Write information about the pool
do {
System.out.printf("Main: Thread Count: %d\n", pool.getActiveThreadCount());
System.out.printf("Main: Thread Steal: %d\n", pool.getStealCount());
System.out.printf("Main: Paralelism: %d\n", pool.getParallelism());
try {
TimeUnit.MILLISECONDS.sleep(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (!task.isDone());
// Shutdown the pool
pool.shutdown();
// Check if the task has completed normally
if (task.isCompletedNormally()) {
System.out.printf("Main: The process has completed normally.\n");
}
// Expected result: 12. Write products which price is not 12
for (int i = 0; i < products.size(); i++) {
Product product = products.get(i);
if (product.getPrice() != 12) {
System.out.printf("Product %s: %f\n", product.getName(), product.getPrice());
}
}
// End of the program
System.out.println("Main: End of the program.\n");
}
/**
* setUncaughtExceptionHandler changes handler for uncaught exceptions.
*
* <p>Additionally tests: Overriding ForkJoinWorkerThread.onStart performs its defined action
*/
public void testSetUncaughtExceptionHandler() throws InterruptedException {
final CountDownLatch uehInvoked = new CountDownLatch(1);
final Thread.UncaughtExceptionHandler ueh =
new Thread.UncaughtExceptionHandler() {
public void uncaughtException(Thread t, Throwable e) {
threadAssertTrue(e instanceof MyError);
threadAssertTrue(t instanceof FailingFJWSubclass);
uehInvoked.countDown();
}
};
ForkJoinPool p = new ForkJoinPool(1, new FailingThreadFactory(), ueh, false);
try (PoolCleaner cleaner = cleaner(p)) {
assertSame(ueh, p.getUncaughtExceptionHandler());
try {
p.execute(new FibTask(8));
await(uehInvoked);
} finally {
p.shutdownNow(); // failure might have prevented processing task
}
}
}
public OWLOntology findLsignature(
OWLOntology ontology, LogicFragment fragment, Statistics stats) {
Timer t = new Timer();
this.stats = stats;
Logger_MORe.logInfo("extracting " + fragment.toString() + "-signature");
OWLOntology ret = null;
OWLOntologyManager manager = ontology.getOWLOntologyManager();
try {
ret = manager.createOntology();
manager.addAxioms(ret, ontology.getAxioms());
} catch (OWLOntologyCreationException e) {
e.printStackTrace();
}
lSignatureClasses = new HashSet<OWLClass>();
lSignatureOther = new HashSet<OWLEntity>();
compSignatureClasses = new HashSet<OWLClass>();
compSignatureOther = new HashSet<OWLEntity>();
LsignatureExtractorLauncher elkSignatureExtractorLauncher = null;
LsignatureExtractorLauncher elkSignatureExtractorIntegratingRangesLauncher = null;
LsignatureExtractorViaInverseRewritingLauncher elkSignatureExtractorRewritingInversesLauncher =
null;
ForkJoinPool executor = new ForkJoinPool();
elkSignatureExtractorLauncher =
new LsignatureExtractorLauncher(ontology, LogicFragment.ELK, false);
executor.execute(elkSignatureExtractorLauncher);
if (ret != null) {
// otherwise we have nowhere to return the axioms in the normalised ontologies necessary to
// really classify all the extra classses in the lSignature
if (rewriteInverses) {
elkSignatureExtractorRewritingInversesLauncher =
new LsignatureExtractorViaInverseRewritingLauncher(ontology, LogicFragment.ELK);
executor.execute(elkSignatureExtractorRewritingInversesLauncher);
}
if (integrateRanges) {
elkSignatureExtractorIntegratingRangesLauncher =
new LsignatureExtractorLauncher(ontology, LogicFragment.ELK, true);
executor.execute(elkSignatureExtractorIntegratingRangesLauncher);
}
// check the output of the normal ELKsignature and cancel the other threads if the lSig is the
// whole signature
initialiseLsignature((LsignatureExtractor) elkSignatureExtractorLauncher.join());
if (compSignatureClasses.isEmpty())
cancelTasks(
elkSignatureExtractorIntegratingRangesLauncher,
elkSignatureExtractorRewritingInversesLauncher);
else {
if (elkSignatureExtractorRewritingInversesLauncher != null
&& extendLsignature(
(LsignatureExtractor) elkSignatureExtractorRewritingInversesLauncher.join())
> 0) {
manager.addAxioms(
ret,
((LsignatureExtractorViaInverseRewritingLauncher)
elkSignatureExtractorRewritingInversesLauncher)
.getOntology()
.getAxioms());
}
if (compSignatureClasses.isEmpty())
cancelTasks(elkSignatureExtractorRewritingInversesLauncher);
else if (elkSignatureExtractorIntegratingRangesLauncher != null
&& extendLsignature(
(LsignatureExtractor) elkSignatureExtractorIntegratingRangesLauncher.join())
> 0) {
manager.addAxioms(
ret,
((LsignatureExtractorLauncher) elkSignatureExtractorIntegratingRangesLauncher)
.getOntology()
.getAxioms());
}
}
stats.updateLsignatureSize(lSignatureClasses.size(), true);
} else {
ret = ontology;
initialiseLsignature((LsignatureExtractor) elkSignatureExtractorLauncher.join());
}
Logger_MORe.logInfo(lSignatureClasses.size() + "classes in lSignature");
Logger_MORe.logDebug(lSignatureClasses.toString());
Logger_MORe.logInfo(compSignatureClasses.size() + "classes in compSignature");
// might be a good idea to try to isolate extra axioms in the normalisation/rewriting - is this
// possible/worth the effort?
// check the order in which we try to extend the lSignature with each of the rewritten
// ontologies and consider if one may be better that the other
Logger_MORe.logDebug(t.duration() + "s to find Lsignature");
return ret;
}
@Test
public void testAsyncRangeRequests()
throws IOException, URISyntaxException, InterruptedException {
final URL testResourceUrl = new URL(VAULT_BASE_URI.toURL(), "asyncRangeRequestTestFile.txt");
final MultiThreadedHttpConnectionManager cm = new MultiThreadedHttpConnectionManager();
cm.getParams().setDefaultMaxConnectionsPerHost(50);
final HttpClient client = new HttpClient(cm);
// prepare 8MiB test data:
final byte[] plaintextData = new byte[2097152 * Integer.BYTES];
final ByteBuffer bbIn = ByteBuffer.wrap(plaintextData);
for (int i = 0; i < 2097152; i++) {
bbIn.putInt(i);
}
// put request:
final EntityEnclosingMethod putMethod = new PutMethod(testResourceUrl.toString());
putMethod.setRequestEntity(new ByteArrayRequestEntity(plaintextData));
final int putResponse = client.executeMethod(putMethod);
putMethod.releaseConnection();
Assert.assertEquals(201, putResponse);
// multiple async range requests:
final List<ForkJoinTask<?>> tasks = new ArrayList<>();
final Random generator = new Random(System.currentTimeMillis());
final AtomicBoolean success = new AtomicBoolean(true);
// 10 full interrupted requests:
for (int i = 0; i < 10; i++) {
final ForkJoinTask<?> task =
ForkJoinTask.adapt(
() -> {
try {
final HttpMethod getMethod = new GetMethod(testResourceUrl.toString());
final int statusCode = client.executeMethod(getMethod);
if (statusCode != 200) {
LOG.error("Invalid status code for interrupted full request");
success.set(false);
}
getMethod.getResponseBodyAsStream().read();
getMethod.getResponseBodyAsStream().close();
getMethod.releaseConnection();
} catch (IOException e) {
throw new RuntimeException(e);
}
});
tasks.add(task);
}
// 50 crappy interrupted range requests:
for (int i = 0; i < 50; i++) {
final int lower = generator.nextInt(plaintextData.length);
final ForkJoinTask<?> task =
ForkJoinTask.adapt(
() -> {
try {
final HttpMethod getMethod = new GetMethod(testResourceUrl.toString());
getMethod.addRequestHeader("Range", "bytes=" + lower + "-");
final int statusCode = client.executeMethod(getMethod);
if (statusCode != 206) {
LOG.error("Invalid status code for interrupted range request");
success.set(false);
}
getMethod.getResponseBodyAsStream().read();
getMethod.getResponseBodyAsStream().close();
getMethod.releaseConnection();
} catch (IOException e) {
throw new RuntimeException(e);
}
});
tasks.add(task);
}
// 50 normal open range requests:
for (int i = 0; i < 50; i++) {
final int lower = generator.nextInt(plaintextData.length - 512);
final int upper = plaintextData.length - 1;
final ForkJoinTask<?> task =
ForkJoinTask.adapt(
() -> {
try {
final HttpMethod getMethod = new GetMethod(testResourceUrl.toString());
getMethod.addRequestHeader("Range", "bytes=" + lower + "-");
final byte[] expected = Arrays.copyOfRange(plaintextData, lower, upper + 1);
final int statusCode = client.executeMethod(getMethod);
final byte[] responseBody = new byte[upper - lower + 10];
final int bytesRead =
IOUtils.read(getMethod.getResponseBodyAsStream(), responseBody);
getMethod.releaseConnection();
if (statusCode != 206) {
LOG.error("Invalid status code for open range request");
success.set(false);
} else if (upper - lower + 1 != bytesRead) {
LOG.error("Invalid response length for open range request");
success.set(false);
} else if (!Arrays.equals(
expected, Arrays.copyOfRange(responseBody, 0, bytesRead))) {
LOG.error("Invalid response body for open range request");
success.set(false);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
});
tasks.add(task);
}
// 200 normal closed range requests:
for (int i = 0; i < 200; i++) {
final int pos1 = generator.nextInt(plaintextData.length - 512);
final int pos2 = pos1 + 512;
final ForkJoinTask<?> task =
ForkJoinTask.adapt(
() -> {
try {
final int lower = Math.min(pos1, pos2);
final int upper = Math.max(pos1, pos2);
final HttpMethod getMethod = new GetMethod(testResourceUrl.toString());
getMethod.addRequestHeader("Range", "bytes=" + lower + "-" + upper);
final byte[] expected = Arrays.copyOfRange(plaintextData, lower, upper + 1);
final int statusCode = client.executeMethod(getMethod);
final byte[] responseBody = new byte[upper - lower + 1];
final int bytesRead =
IOUtils.read(getMethod.getResponseBodyAsStream(), responseBody);
getMethod.releaseConnection();
if (statusCode != 206) {
LOG.error("Invalid status code for closed range request");
success.set(false);
} else if (upper - lower + 1 != bytesRead) {
LOG.error("Invalid response length for closed range request");
success.set(false);
} else if (!Arrays.equals(
expected, Arrays.copyOfRange(responseBody, 0, bytesRead))) {
LOG.error("Invalid response body for closed range request");
success.set(false);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
});
tasks.add(task);
}
Collections.shuffle(tasks, generator);
final ForkJoinPool pool = new ForkJoinPool(4);
for (ForkJoinTask<?> task : tasks) {
pool.execute(task);
}
for (ForkJoinTask<?> task : tasks) {
task.join();
}
pool.shutdown();
cm.shutdown();
Assert.assertTrue(success.get());
}