/**
* Test that an open circuit is closed after 1 success. This also ensures that the rolling window
* (containing failures) is cleared after the sleep window Otherwise, the next bucket roll would
* produce another signal to fail unless it is explicitly cleared (via {@link
* HystrixCommandMetrics#resetStream()}.
*/
@Test
public void testCircuitClosedAfterSuccess() {
String key = "cmd-G";
try {
int sleepWindow = 20;
HystrixCommand<Boolean> cmd1 = new FailureCommand(key, 1, sleepWindow);
HystrixCircuitBreaker cb = cmd1.circuitBreaker;
// this should start as allowing requests
assertTrue(cb.allowRequest());
assertFalse(cb.isOpen());
cmd1.execute();
HystrixCommand<Boolean> cmd2 = new FailureCommand(key, 1, sleepWindow);
cmd2.execute();
HystrixCommand<Boolean> cmd3 = new FailureCommand(key, 1, sleepWindow);
cmd3.execute();
HystrixCommand<Boolean> cmd4 = new TimeoutCommand(key, sleepWindow);
cmd4.execute();
// everything has failed in the test window so we should return false now
Thread.sleep(100);
System.out.println(
"ReqLog : " + HystrixRequestLog.getCurrentRequest().getExecutedCommandsAsString());
System.out.println("CircuitBreaker state 1 : " + cmd1.getMetrics().getHealthCounts());
assertFalse(cb.allowRequest());
assertTrue(cb.isOpen());
// wait for sleepWindow to pass
Thread.sleep(sleepWindow + 50);
// but the circuit should still be open
assertTrue(cb.isOpen());
// we should now allow 1 request, and upon success, should cause the circuit to be closed
HystrixCommand<Boolean> cmd5 = new SuccessCommand(key, 60, sleepWindow);
Observable<Boolean> asyncResult = cmd5.observe();
// and further requests are still blocked while the singleTest command is in flight
assertFalse(cb.allowRequest());
asyncResult.toBlocking().single();
// all requests should be open again
System.out.println("CircuitBreaker state 2 : " + cmd1.getMetrics().getHealthCounts());
assertTrue(cb.allowRequest());
assertTrue(cb.allowRequest());
assertTrue(cb.allowRequest());
// and the circuit should be closed again
assertFalse(cb.isOpen());
} catch (Exception e) {
e.printStackTrace();
fail("Error occurred: " + e.getMessage());
}
}
@Test
public void createFailsValidation() {
Identity identity = new Identity(UUID.randomUUID());
ProfileContact contact = new ProfileContact(1, "email", new DefaultContactData("a@"), true);
ProfileContacts contacts = new ProfileContacts(Lists.newArrayList(contact));
Observable<Result> result = service.create(identity, contacts);
assertEquals(Result.withClientCause("Invalid Contacts"), result.toBlocking().first());
}
@Test
public void createWithValidInput() {
Identity identity = new Identity(UUID.randomUUID());
ProfileContact contact =
new ProfileContact(1, "email", new DefaultContactData("*****@*****.**"), true);
ProfileContacts contacts = new ProfileContacts(Lists.newArrayList(contact));
when(loader.create(identity, contact)).thenReturn(Observable.just(Boolean.TRUE));
Observable<Result> result = service.create(identity, contacts);
assertEquals(Result.success(), result.toBlocking().first());
}
@Test
public void createFailsInternalUpdate() throws Exception {
Identity identity = new Identity(UUID.randomUUID());
ProfileContact contact =
new ProfileContact(1, "email", new DefaultContactData("*****@*****.**"), true);
ProfileContacts contacts = new ProfileContacts(Lists.newArrayList(contact));
when(loader.create(identity, contact)).thenReturn(Observable.just(Boolean.FALSE));
Observable<Result> result = service.create(identity, contacts);
assertEquals(
Result.withServerCause("There was an unexpected error processing your request."),
result.toBlocking().first());
}
@Test(timeout = 30000)
public void testIssue1527() throws InterruptedException {
// https://github.com/Netflix/RxJava/pull/1527
Observable<Integer> source = Observable.just(1, 2, 3, 4, 5, 6);
Observable<Integer> reduced =
source.reduce(
new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer i1, Integer i2) {
return i1 + i2;
}
});
Integer r = reduced.toBlocking().first();
assertEquals(21, r.intValue());
}
// validate payloads
private void validate(EntityRef ref, ServicePayload servicePayload) throws Exception {
Object obj_payloads = servicePayload.getProperty("payloads");
if (obj_payloads == null && ref == null) {
throw new RequiredPropertyNotFoundException("notification", "payloads");
}
if (obj_payloads != null) {
if (!(obj_payloads instanceof Map)) {
throw new IllegalArgumentException("payloads must be a JSON Map");
}
final Map<String, Object> payloads = (Map<String, Object>) obj_payloads;
final Map<Object, Notifier> notifierMap = getNotifierMap(payloads);
Observable t =
Observable.from(payloads.entrySet())
.subscribeOn(Schedulers.io())
.map(
new Func1<Map.Entry<String, Object>, Object>() {
@Override
public Object call(Map.Entry<String, Object> entry) {
String notifierId = entry.getKey();
Notifier notifier = notifierMap.get(notifierId);
if (notifier == null) {
throw new IllegalArgumentException(
"notifier \"" + notifierId + "\" not found");
}
ProviderAdapter providerAdapter =
ProviderAdapterFactory.getProviderAdapter(notifier, em);
Object payload = entry.getValue();
try {
return providerAdapter.translatePayload(payload); // validate
// specifically to
// provider
} catch (Exception e) {
return e;
}
}
});
Object e = t.toBlocking().lastOrDefault(null);
if (e instanceof Throwable) {
throw new Exception((Exception) e);
}
}
}
@Test
public void linesWritten() throws IOException {
// given:
final WritableResource<String, Void> resource = createDefaultResource();
final String expectedLine = createDefaultResourceState();
final int numLines = 3;
// when:
for (int i = 0; i < numLines; ++i) {
final Observable<Void> response = resource.write(expectedLine);
final Iterator<?> it = response.toBlocking().getIterator();
assertFalse(it.hasNext());
}
// then:
try (BufferedReader reader = new BufferedReader(new FileReader(this.file))) {
for (int i = 0; i < numLines; ++i) {
final String actualLine = reader.readLine();
assertEquals(expectedLine, actualLine);
}
assertNull(reader.readLine());
}
}
/**
* Retrieve and optionally display an image. See {@link #HtmlImage(String, boolean, int, boolean,
* TextView)} for the various behaviours.
*
* @param url the URL to fetch from cache or network
* @return a drawable containing the image, or <tt>null</tt> if <tt>onlySave</tt> is <tt>true</tt>
*/
@Nullable
@Override
public BitmapDrawable getDrawable(final String url) {
if (cache.containsKey(url)) {
return cache.get(url);
}
final Observable<BitmapDrawable> drawable = fetchDrawable(url);
if (onlySave) {
loading.onNext(
drawable.map(
new Func1<BitmapDrawable, String>() {
@Override
public String call(final BitmapDrawable bitmapDrawable) {
return url;
}
}));
cache.put(url, null);
return null;
}
final BitmapDrawable result =
view == null ? drawable.toBlocking().lastOrDefault(null) : getContainerDrawable(drawable);
cache.put(url, result);
return result;
}
private JsonNode processEditEntityResponse(
final String entityIdentifier,
final Observable<Response> createEntityResponse,
final String type)
throws IOException {
final Response response = createEntityResponse.toBlocking().firstOrDefault(null);
if (response == null) {
final String message =
String.format("could not create new %s for '%s'", type, entityIdentifier);
LOG.error(message);
throw new WikidataImporterError(new WikidataImporterException(message));
}
final int status = response.getStatus();
LOG.debug("response status = {}", status);
if (status != 200) {
final String message =
String.format(
"could not create new %s for '%s'; response status != 200 (was '%d').",
type, entityIdentifier, status);
LOG.error(message);
throw new WikidataImporterError(new WikidataImporterException(message));
}
final String responseBody = response.readEntity(String.class);
LOG.debug("response body = {}", responseBody);
final ObjectNode responseJSON = MAPPER.readValue(responseBody, ObjectNode.class);
if (responseJSON == null) {
final String message =
String.format(
"could not create new %s for '%s'; could not deserialize response.",
type, entityIdentifier);
LOG.error(message);
throw new WikidataImporterError(new WikidataImporterException(message));
}
final JsonNode errorNode = responseJSON.get(MEDIAWIKI_ERROR_IDENTIFIER);
if (errorNode != null) {
final String message =
String.format(
"could not create new %s for '%s'; an error occurred ('%s').",
type, entityIdentifier, responseBody);
LOG.debug(message);
// return error so that it can be handled at the client
return responseJSON;
}
final JsonNode successNode = responseJSON.get(MEDIAWIKI_SUCCESS_IDENTIFIER);
if (successNode == null) {
final String message =
String.format(
"could not create new %s for '%s'; no 'success' node in response ('%s')",
type, entityIdentifier, responseBody);
LOG.error(message);
throw new WikidataImporterError(new WikidataImporterException(message));
}
final int success = successNode.asInt();
if (success != 1) {
final String message =
String.format(
"could not create new %s for '%s'; 'success' = '%d'",
type, entityIdentifier, success);
LOG.error(message);
throw new WikidataImporterError(new WikidataImporterException(message));
}
final JsonNode entityNode = responseJSON.get(MEDIAWIKI_ENTITY_IDENTIFIER);
if (entityNode == null) {
final String message =
String.format(
"could not create new %s for '%s'; no 'entity' node in response ('%s')",
type, entityIdentifier, responseBody);
LOG.error(message);
throw new WikidataImporterError(new WikidataImporterException(message));
}
return entityNode;
}
/**
* Over a period of several 'windows' a single attempt will be made and fail and then finally
* succeed and close the circuit.
*
* <p>Ensure the circuit is kept open through the entire testing period and that only the single
* attempt in each window is made.
*/
@Test
public void testMultipleTimeWindowRetriesBeforeClosingCircuit() {
String key = "cmd-H";
try {
int sleepWindow = 200;
HystrixCommand<Boolean> cmd1 = new FailureCommand(key, 60);
HystrixCircuitBreaker cb = cmd1.circuitBreaker;
// this should start as allowing requests
assertTrue(cb.allowRequest());
assertFalse(cb.isOpen());
cmd1.execute();
HystrixCommand<Boolean> cmd2 = new FailureCommand(key, 1);
cmd2.execute();
HystrixCommand<Boolean> cmd3 = new FailureCommand(key, 1);
cmd3.execute();
HystrixCommand<Boolean> cmd4 = new TimeoutCommand(key);
cmd4.execute();
// everything has failed in the test window so we should return false now
System.out.println("!!!! 1 4 failures, circuit will open on recalc");
Thread.sleep(100);
assertFalse(cb.allowRequest());
assertTrue(cb.isOpen());
// wait for sleepWindow to pass
System.out.println("!!!! 2 Sleep window starting where all commands fail-fast");
Thread.sleep(sleepWindow + 50);
System.out.println("!!!! 3 Sleep window over, should allow singleTest()");
// but the circuit should still be open
assertTrue(cb.isOpen());
// we should now allow 1 request, and upon failure, should not affect the circuit breaker,
// which should remain open
HystrixCommand<Boolean> cmd5 = new FailureCommand(key, 60);
Observable<Boolean> asyncResult5 = cmd5.observe();
System.out.println("!!!! Kicked off the single-test");
// and further requests are still blocked while the singleTest command is in flight
assertFalse(cb.allowRequest());
System.out.println("!!!! Confirmed that no other requests go out during single-test");
asyncResult5.toBlocking().single();
System.out.println("!!!! SingleTest just completed");
// all requests should still be blocked, because the singleTest failed
assertFalse(cb.allowRequest());
assertFalse(cb.allowRequest());
assertFalse(cb.allowRequest());
// wait for sleepWindow to pass
System.out.println("!!!! 2nd sleep window START");
Thread.sleep(sleepWindow + 50);
System.out.println("!!!! 2nd sleep window over");
// we should now allow 1 request, and upon failure, should not affect the circuit breaker,
// which should remain open
HystrixCommand<Boolean> cmd6 = new FailureCommand(key, 60);
Observable<Boolean> asyncResult6 = cmd6.observe();
System.out.println("2nd singleTest just kicked off");
// and further requests are still blocked while the singleTest command is in flight
assertFalse(cb.allowRequest());
System.out.println("confirmed that 2nd singletest only happened once");
asyncResult6.toBlocking().single();
System.out.println("2nd singleTest now over");
// all requests should still be blocked, because the singleTest failed
assertFalse(cb.allowRequest());
assertFalse(cb.allowRequest());
assertFalse(cb.allowRequest());
// wait for sleepWindow to pass
Thread.sleep(sleepWindow + 50);
// but the circuit should still be open
assertTrue(cb.isOpen());
// we should now allow 1 request, and upon success, should cause the circuit to be closed
HystrixCommand<Boolean> cmd7 = new SuccessCommand(key, 60);
Observable<Boolean> asyncResult7 = cmd7.observe();
// and further requests are still blocked while the singleTest command is in flight
assertFalse(cb.allowRequest());
asyncResult7.toBlocking().single();
// all requests should be open again
assertTrue(cb.allowRequest());
assertTrue(cb.allowRequest());
assertTrue(cb.allowRequest());
// and the circuit should be closed again
assertFalse(cb.isOpen());
// and the circuit should be closed again
assertFalse(cb.isOpen());
} catch (Exception e) {
e.printStackTrace();
fail("Error occurred: " + e.getMessage());
}
}
