/**
* Copyright 2014 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package rx.internal.operators;
import rx.
Observable.
Operator;
import rx.
Subscriber;
import rx.exceptions.
Exceptions;
import rx.functions.
Action0;
import rx.plugins.
RxJavaHooks;
/**
* Registers an action to be called after an Observable invokes {@code onComplete} or {@code onError}.
* <p>
* <img width="640" src="https://github.com/ReactiveX/RxJava/wiki/images/rx-operators/finallyDo.png" alt="">
* <p>
* See also the <a href="http://msdn.microsoft.com/en-us/library/hh212133.aspx">MSDN Observable.Finally
* method</a>
*
* @param <T> the value type
*/
public final class
OperatorDoAfterTerminate<T> implements
Operator<T, T> {
final
Action0 action;
public
OperatorDoAfterTerminate(
Action0 action) {
if (
action == null) {
throw new
NullPointerException("Action can not be null");
}
this.
action =
action;
}
@
Override
public
Subscriber<? super T>
call(final
Subscriber<? super T>
child) {
return new
Subscriber<T>(
child) {
@
Override
public void
onNext(T
t) {
child.
onNext(
t);
}
@
Override
public void
onError(
Throwable e) {
try {
child.
onError(
e);
} finally {
callAction();
}
}
@
Override
public void
onCompleted() {
try {
child.
onCompleted();
} finally {
callAction();
}
}
void
callAction() {
try {
action.
call();
} catch (
Throwable ex) {
Exceptions.
throwIfFatal(
ex);
RxJavaHooks.
onError(
ex);
}
}
};
}
}