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Messenger.java
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/
Messenger.java
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/*
* Copyright 2019 National Bank of Belgium
*
* Licensed under the EUPL, Version 1.1 or - as soon they will be approved
* by the European Commission - subsequent versions of the EUPL (the "Licence");
* You may not use this work except in compliance with the Licence.
* You may obtain a copy of the Licence at:
*
* http://ec.europa.eu/idabc/eupl
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the Licence is distributed on an "AS IS" basis,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Licence for the specific language governing permissions and
* limitations under the Licence.
*/
package nbbrd.service.examples;
import java.util.Optional;
import javax.swing.JOptionPane;
import nbbrd.service.Mutability;
import nbbrd.service.ServiceDefinition;
/**
*
* @author Philippe Charles
*/
@ServiceDefinition(mutability = Mutability.BASIC)
public interface Messenger {
void send(String message);
static void main(String[] args) {
MessengerLoader loader = new MessengerLoader();
loader.get().ifPresent(o -> o.send("First"));
loader.set(Optional.of(System.out::println));
loader.get().ifPresent(o -> o.send("Second"));
loader.set(Optional.of(msg -> JOptionPane.showMessageDialog(null, msg)));
loader.get().ifPresent(o -> o.send("Third"));
loader.reload();
loader.get().ifPresent(o -> o.send("Fourth"));
}
}