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package org.glassfish.jersey.test.util.runner;
import java.lang.reflect.Method;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.runner.Runner;
import org.junit.runner.notification.Failure;
import org.junit.runner.notification.RunNotifier;
import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.model.FrameworkMethod;
import org.glassfish.jersey.Beta;
/**
* Jersey implementation of a JUnit {@link Runner} that runs
* all test methods within a single test class in parallel.
* The main purpose is to avoid having HTTP container
* launched separately for each individual test.
* Order in which individual test methods are invoked
* is not guaranteed and is non-deterministic.
*
* Test methods that needs a separate container or needs
* to run separately for other reasons
* could be annotated with {@link RunSeparately} annotation.
* These test methods will then be excluded
* from parallel processing, and will be invoked
* as if no special concurrent runner was involved.
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
*/
@Beta
public class ConcurrentRunner extends BlockJUnit4ClassRunner {
public final int FINISH_WAIT_CYCLE_MS = 2000;
public final int TEST_THREADS = 124;
private static final Logger LOGGER = Logger.getLogger(ConcurrentRunner.class.getName());
private final ExecutorService executor = Executors.newFixedThreadPool(TEST_THREADS);
private final Semaphore permitToGo = new Semaphore(1);
private final AtomicInteger invocations = new AtomicInteger(1);
/**
* Create a new runner for given test class.
*
* @param clazz test class
* @throws Throwable
*/
public ConcurrentRunner(Class<?> clazz) throws Throwable {
super(clazz);
concurrentTestMethods = new LinkedList<>(super.computeTestMethods());
concurrentTestMethods.removeAll(getTestClass().getAnnotatedMethods(RunSeparately.class));
final List<FrameworkMethod> ignored = getTestClass().getAnnotatedMethods(Ignore.class);
concurrentTestMethods.removeAll(ignored);
}
@Override
protected void validateTestMethods(List<Throwable> errors) {
}
@Override
protected void runChild(final FrameworkMethod method, final RunNotifier notifier) {
synchronized (permitToGo) {
if (concurrentTestMethods.contains(method)) {
if (invocations.compareAndSet(1, 0)) {
runThemAll(concurrentTestMethods, notifier);
}
} else {
super.runChild(method, notifier);
}
}
}
private final List<FrameworkMethod> concurrentTestMethods;
private void runThemAll(final List<FrameworkMethod> methods, final RunNotifier notifier) {
final Object testInstance;
try {
testInstance = super.createTest();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
// run the before methods
List<FrameworkMethod> befores = getTestClass().getAnnotatedMethods(Before.class);
for (FrameworkMethod before : befores) {
try {
before.getMethod().invoke(testInstance);
} catch (Exception ex) {
LOGGER.log(java.util.logging.Level.SEVERE, null, ex);
}
final AtomicInteger submitted = new AtomicInteger(0);
for (final FrameworkMethod method : methods) {
try {
notifier.fireTestStarted(describeChild(method));
final Method javaTestMethod = method.getMethod();
final Object[] javaMethodArgs = new Object[]{};
submitted.incrementAndGet();
executor.submit(new Runnable() {
@Override
public void run() {
try {
javaTestMethod.invoke(testInstance, javaMethodArgs);
} catch (Exception ex) {
notifier.fireTestFailure(new Failure(describeChild(method), ex));
} finally {
submitted.decrementAndGet();
}
}
});
} catch (Exception ex) {
notifier.fireTestFailure(new Failure(describeChild(method), ex));
return;
}
notifier.fireTestFinished(describeChild(method));
}
// wait until everything is done
while (submitted.intValue() > 0) {
LOGGER.info(String.format("Waiting for %d requests to finish...%n", submitted.intValue()));
try {
Thread.sleep(FINISH_WAIT_CYCLE_MS);
} catch (InterruptedException e) {
}
}
// and launch the after party..
List<FrameworkMethod> afters = getTestClass().getAnnotatedMethods(After.class);
for (FrameworkMethod after : afters) {
try {
after.getMethod().invoke(testInstance);
} catch (Exception ex) {
LOGGER.log(Level.SEVERE, null, ex);
}
}
}
}
}