Motivation: There are many use cases where other objects will have fields that are buffers. Since buffers are reference counted, their life cycle needs to be managed carefully. Modification: Add the abstract BufHolder, and the concrete sub-class BufRef, as neat building blocks for building other classes that contain field references to buffers. The behaviours of closed/sent buffers have also been specified in tests, and tightened up in the code. Result: It is now easier to create classes/objects that wrap buffers.
71 lines
2.2 KiB
Java
71 lines
2.2 KiB
Java
/*
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* Copyright 2020 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.buffer.api;
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import org.junit.jupiter.api.Test;
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import java.util.ArrayList;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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public class ScopeTest {
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@Test
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void scopeMustCloseContainedRcsInReverseInsertOrder() {
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ArrayList<Integer> closeOrder = new ArrayList<>();
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try (Scope scope = new Scope()) {
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scope.add(new SomeRc(new OrderingDrop(1, closeOrder)));
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scope.add(new SomeRc(new OrderingDrop(2, closeOrder)));
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scope.add(new SomeRc(new OrderingDrop(3, closeOrder)));
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}
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var itr = closeOrder.iterator();
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assertTrue(itr.hasNext());
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assertEquals(3, (int) itr.next());
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assertTrue(itr.hasNext());
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assertEquals(2, (int) itr.next());
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assertTrue(itr.hasNext());
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assertEquals(1, (int) itr.next());
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assertFalse(itr.hasNext());
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}
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private static final class SomeRc extends RcSupport<SomeRc, SomeRc> {
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SomeRc(Drop<SomeRc> drop) {
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super(drop);
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}
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@Override
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protected Owned<SomeRc> prepareSend() {
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return null;
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}
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}
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private static final class OrderingDrop implements Drop<SomeRc> {
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private final int order;
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private final ArrayList<Integer> list;
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private OrderingDrop(int order, ArrayList<Integer> list) {
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this.order = order;
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this.list = list;
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}
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@Override
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public void drop(SomeRc obj) {
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list.add(order);
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}
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}
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}
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