| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.aries.component.dsl.internal; |
| |
| import org.apache.aries.component.dsl.OSGi; |
| import org.apache.aries.component.dsl.OSGiResult; |
| import org.apache.aries.component.dsl.Publisher; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.function.Function; |
| |
| /** |
| * @author Carlos Sierra Andrés |
| */ |
| public class DistributeOSGiImpl<T, S> extends BaseOSGiImpl<S> { |
| |
| @SafeVarargs |
| public DistributeOSGiImpl(OSGi<T> operation, Function<OSGi<T>, OSGi<S>>... funs) { |
| |
| super((executionContext, publisher) -> { |
| Pad<T, S>[] pads = new Pad[funs.length]; |
| |
| for (int i = 0; i < funs.length; i++) { |
| pads[i] = new Pad<>(executionContext, funs[i], publisher); |
| } |
| |
| OSGiResult result = operation.run( |
| executionContext, |
| publisher.pipe(t -> { |
| List<OSGiResult> terminators = new ArrayList<>(funs.length); |
| |
| int i = 0; |
| |
| try { |
| for (; i < funs.length; i++) { |
| terminators.add(pads[i].publish(t)); |
| } |
| } |
| catch (Exception e) { |
| cleanUp(terminators); |
| |
| throw e; |
| } |
| |
| return new OSGiResultImpl( |
| () -> cleanUp(terminators), |
| us -> terminators.forEach(os -> os.update(us)) |
| ); |
| })); |
| |
| return new AggregateOSGiResult(result, new AggregateOSGiResult(pads)); |
| }); |
| } |
| |
| private static void cleanUp(List<OSGiResult> terminators) { |
| ListIterator<OSGiResult> iterator = |
| terminators.listIterator(terminators.size()); |
| |
| while (iterator.hasPrevious()) { |
| try { |
| iterator.previous().run(); |
| } |
| catch (Exception e) { |
| } |
| } |
| } |
| |
| } |