/**
* Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
*/
package docs.circuitbreaker;
//#imports1
import akka.actor.UntypedActor;
import scala.concurrent.Future;
import akka.event.LoggingAdapter;
import scala.concurrent.duration.Duration;
import akka.pattern.CircuitBreaker;
import akka.event.Logging;
import static akka.pattern.Patterns.pipe;
import static akka.dispatch.Futures.future;
import java.util.concurrent.Callable;
//#imports1
//#circuit-breaker-initialization
public class DangerousJavaActor extends UntypedActor {
private final CircuitBreaker breaker;
private final LoggingAdapter log = Logging.getLogger(getContext().system(), this);
public DangerousJavaActor() {
this.breaker = new CircuitBreaker(
getContext().dispatcher(), getContext().system().scheduler(),
5, Duration.create(10, "s"), Duration.create(1, "m"))
.onOpen(new Runnable() {
public void run() {
notifyMeOnOpen();
}
});
}
public void notifyMeOnOpen() {
log.warning("My CircuitBreaker is now open, and will not close for one minute");
}
//#circuit-breaker-initialization
//#circuit-breaker-usage
public String dangerousCall() {
return "This really isn't that dangerous of a call after all";
}
@Override
public void onReceive(Object message) {
if (message instanceof String) {
String m = (String) message;
if ("is my middle name".equals(m)) {
pipe(breaker.callWithCircuitBreaker(
new Callable<Future<String>>() {
public Future<String> call() throws Exception {
return future(
new Callable<String>() {
public String call() {
return dangerousCall();
}
}, getContext().dispatcher());
}
}), getContext().dispatcher()).to(getSender());
}
if ("block for me".equals(m)) {
getSender().tell(breaker
.callWithSyncCircuitBreaker(
new Callable<String>() {
@Override
public String call() throws Exception {
return dangerousCall();
}
}), getSelf());
}
}
}
//#circuit-breaker-usage
}