com.arangodb.shaded.vertx.core.impl.future.Composition Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2020 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package com.arangodb.shaded.vertx.core.impl.future;
import com.arangodb.shaded.vertx.core.Future;
import com.arangodb.shaded.vertx.core.impl.ContextInternal;
import java.util.function.Function;
/**
* Function compose transformation.
*
* @author Julien Viet
*/
class Composition extends Operation implements Listener {
private final Function> successMapper;
private final Function> failureMapper;
Composition(ContextInternal context, Function> successMapper, Function> failureMapper) {
super(context);
this.successMapper = successMapper;
this.failureMapper = failureMapper;
}
@Override
public void onSuccess(T value) {
FutureInternal future;
try {
future = (FutureInternal) successMapper.apply(value);
} catch (Throwable e) {
tryFail(e);
return;
}
future.addListener(newListener());
}
@Override
public void onFailure(Throwable failure) {
FutureInternal future;
try {
future = (FutureInternal) failureMapper.apply(failure);
} catch (Throwable e) {
tryFail(e);
return;
}
future.addListener(newListener());
}
private Listener newListener() {
return new Listener() {
@Override
public void onSuccess(U value) {
tryComplete(value);
}
@Override
public void onFailure(Throwable failure) {
tryFail(failure);
}
};
}
}