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Demonstrate how to tell if a user-supplied getFallback() exists #529

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Demonstrate how to tell if a user-supplied getFallback() exists #529

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9 changes: 9 additions & 0 deletions hystrix-core/src/main/java/com/netflix/hystrix/HystrixCommand.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
package com.netflix.hystrix;

import java.lang.ref.Reference;
import java.util.Arrays;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
Expand Down Expand Up @@ -307,11 +308,19 @@ public void call(Subscriber<? super R> s) {

@Override
final protected Observable<R> getFallbackObservable() {
final HystrixCommand<R> _self = this;

return Observable.create(new OnSubscribe<R>() {

@Override
public void call(Subscriber<? super R> s) {
try {
try {
_self.getClass().getDeclaredMethod("getFallback");
System.out.println("Fallback *WAS* FOUND!");
} catch (NoSuchMethodException nmse) {
System.out.println("Fallback not found!");
}
s.onNext(getFallback());
s.onCompleted();
} catch (Throwable e) {
Expand Down