f0ee2e1467
This is a step toward effectively eliminating reference counting. Reference counting is only needed when the memory in buffers can be shared. If we remove all forms of sharing, then the buffers would be in an owned state at all times. Then we would no longer need to worry about the state of the buffers before calling, e.g. `ensureWritable` and methods like that. Just removing `acquire` is not enough; we also need to remove the `slice` method. In this commit we are, however, starting with `acquire` because doing so requires rearranging the type hierarchy and the generics we have in play. This was not an easy exercise, but for the purpose of record keeping, it's useful to have that work separate from the work of removing `slice`.
75 lines
2.5 KiB
Java
75 lines
2.5 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.tests;
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import io.netty.buffer.api.Drop;
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import io.netty.buffer.api.Owned;
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import io.netty.buffer.api.internal.ResourceSupport;
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import io.netty.buffer.api.Scope;
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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 scopeMustCloseContainedRecouresInReverseInsertOrder() {
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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 SomeResource(new OrderingDrop(1, closeOrder)));
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scope.add(new SomeResource(new OrderingDrop(2, closeOrder)));
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scope.add(new SomeResource(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 SomeResource extends ResourceSupport<SomeResource, SomeResource> {
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SomeResource(Drop<SomeResource> drop) {
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super(drop);
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}
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@Override
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protected Owned<SomeResource> 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<SomeResource> {
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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(SomeResource obj) {
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list.add(order);
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}
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}
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}
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