import akka.pattern.Patterns;
import akka.util.Timeout;
import com.google.common.collect.Lists;
+import com.google.common.util.concurrent.Uninterruptibles;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import org.junit.Assert;
import scala.concurrent.Await;
import scala.concurrent.Future;
import scala.concurrent.duration.Duration;
import scala.concurrent.duration.FiniteDuration;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.concurrent.TimeUnit;
-
public class MessageCollectorActor extends UntypedActor {
- private List<Object> messages = new ArrayList<>();
+ private static final String ARE_YOU_READY = "ARE_YOU_READY";
+
+ private final List<Object> messages = new ArrayList<>();
@Override public void onReceive(Object message) throws Exception {
+ if(message.equals(ARE_YOU_READY)) {
+ getSender().tell("yes", getSelf());
+ return;
+ }
+
if(message instanceof String){
if("get-all-messages".equals(message)){
- getSender().tell(messages, getSelf());
+ getSender().tell(new ArrayList<>(messages), getSelf());
}
- } else {
+ } else if(message != null) {
messages.add(message);
}
}
+ public void clear() {
+ messages.clear();
+ }
+
public static List<Object> getAllMessages(ActorRef actor) throws Exception {
FiniteDuration operationDuration = Duration.create(5, TimeUnit.SECONDS);
Timeout operationTimeout = new Timeout(operationDuration);
Future<Object> future = Patterns.ask(actor, "get-all-messages", operationTimeout);
- try {
- return (List<Object>) Await.result(future, operationDuration);
- } catch (Exception e) {
- throw e;
- }
+ return (List<Object>) Await.result(future, operationDuration);
}
/**
* @param clazz
* @return
*/
- public static Object getFirstMatching(ActorRef actor, Class<?> clazz) throws Exception {
+ public static <T> T getFirstMatching(ActorRef actor, Class<T> clazz) throws Exception {
List<Object> allMessages = getAllMessages(actor);
for(Object message : allMessages){
if(message.getClass().equals(clazz)){
- return message;
+ return (T) message;
}
}
return null;
}
- public static List<Object> getAllMatching(ActorRef actor, Class<?> clazz) throws Exception {
+ public static <T> T expectFirstMatching(ActorRef actor, Class<T> clazz) {
+ return expectFirstMatching(actor, clazz, 5000);
+ }
+
+ public static <T> T expectFirstMatching(ActorRef actor, Class<T> clazz, long timeout) {
+ int count = (int) (timeout / 50);
+ for(int i = 0; i < count; i++) {
+ try {
+ T message = getFirstMatching(actor, clazz);
+ if(message != null) {
+ return message;
+ }
+ } catch (Exception e) {}
+
+ Uninterruptibles.sleepUninterruptibly(50, TimeUnit.MILLISECONDS);
+ }
+
+ Assert.fail("Did not receive message of type " + clazz);
+ return null;
+ }
+
+ public static <T> List<T> getAllMatching(ActorRef actor, Class<T> clazz) throws Exception {
List<Object> allMessages = getAllMessages(actor);
- List<Object> output = Lists.newArrayList();
+ List<T> output = Lists.newArrayList();
for(Object message : allMessages){
if(message.getClass().equals(clazz)){
- output.add(message);
+ output.add((T) message);
}
}
return output;
}
+ public static void waitUntilReady(ActorRef actor) throws Exception {
+ long timeout = 500;
+ FiniteDuration duration = Duration.create(timeout, TimeUnit.MILLISECONDS);
+ for(int i = 0; i < 10; i++) {
+ try {
+ Await.ready(Patterns.ask(actor, ARE_YOU_READY, timeout), duration);
+ return;
+ } catch (TimeoutException e) {
+ }
+ }
+
+ throw new TimeoutException("Actor not ready in time.");
+ }
}