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Make CompositeBuffer an interface (#11687) 

Motivation:
Having composite buffer as a class has caused problems in the past.
Making it an interface makes it possible to stub or decorate the composite buffer implementation.

Modification:
Make CompositeBuffer an interface, and move the implementation to DefaultCompositeBuffer.
Then hide the implementation and permit construction only through static factory methods.

Result:
CompositeBuffer is now an interface.
This commit is contained in:
Chris Vest 2021-09-16 13:25:45 +02:00 committed by GitHub
parent 8339a00fd6
commit 0973673fce
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 1783 additions and 1603 deletions
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1646
buffer/src/main/java/io/netty/buffer/api/CompositeBuffer.java
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1688
buffer/src/main/java/io/netty/buffer/api/DefaultCompositeBuffer.java Normal file
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52
buffer/src/test/java/io/netty/buffer/api/tests/BufferCompositionTest.java
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@ -116,7 +116,7 @@ public class BufferCompositionTest extends BufferTestSupport {
Buffer a = allocator.allocate(8);
Buffer b = allocator.allocate(8);
CompositeBuffer composed = CompositeBuffer.compose(allocator, a.send())) {
try (Buffer ignore = acquire(composed)) {
try (Buffer ignore = acquire((ResourceSupport<?, ?>) composed)) {
var exc = assertThrows(IllegalStateException.class, () -> composed.extendWith(b.send()));
assertThat(exc).hasMessageContaining("owned");
}
@ -147,13 +147,13 @@ public class BufferCompositionTest extends BufferTestSupport {
try (BufferAllocator allocator = BufferAllocator.onHeapUnpooled()) {
Buffer a = allocator.allocate(1);
CompositeBuffer composite = CompositeBuffer.compose(allocator, a.send());
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertThat(composite.capacity()).isOne();
assertThat(composite.countComponents()).isOne();
try (Buffer b = CompositeBuffer.compose(allocator)) {
composite.extendWith(b.send());
}
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertThat(composite.capacity()).isOne();
assertThat(composite.countComponents()).isOne();
}
@ -396,11 +396,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsFloor(4)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isZero();
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(16);
}
@ -414,11 +414,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsFloor(7)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isZero();
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(16);
}
@ -432,11 +432,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsFloor(12)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(8);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(8);
}
@ -450,11 +450,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsFloor(8)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(8);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(8);
}
@ -468,11 +468,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsCeil(4)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(8);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(8);
}
@ -486,11 +486,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsCeil(7)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(8);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(8);
}
@ -498,17 +498,17 @@ public class BufferCompositionTest extends BufferTestSupport {
}
@Test
public void splitComponentsCeilMustGiveBufferWithFirstAndSecondComponentForfOffsetInSecondComponent() {
public void splitComponentsCeilMustGiveBufferWithFirstAndSecondComponentForOffsetInSecondComponent() {
try (BufferAllocator allocator = BufferAllocator.onHeapUnpooled();
CompositeBuffer composite = CompositeBuffer.compose(allocator,
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsCeil(12)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(16);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(0);
}
@ -520,11 +520,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsCeil(12)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(16);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(8);
}
@ -532,17 +532,17 @@ public class BufferCompositionTest extends BufferTestSupport {
}
@Test
public void splitComponentsCeilMustGiveBufferWithFirstComponentForfOffsetOnFirstByteInSecondComponent() {
public void splitComponentsCeilMustGiveBufferWithFirstComponentForOffsetOnFirstByteInSecondComponent() {
try (BufferAllocator allocator = BufferAllocator.onHeapUnpooled();
CompositeBuffer composite = CompositeBuffer.compose(allocator,
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsCeil(7)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isEqualTo(8);
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(8);
}
@ -556,11 +556,11 @@ public class BufferCompositionTest extends BufferTestSupport {
allocator.allocate(8).send(),
allocator.allocate(8).send())) {
try (CompositeBuffer split = composite.splitComponentsCeil(0)) {
assertTrue(isOwned(split));
assertTrue(isOwned((ResourceSupport<?, ?>) split));
assertTrue(split.isAccessible());
assertThat(split.capacity()).isZero();
assertTrue(isOwned(composite));
assertTrue(isOwned((ResourceSupport<?, ?>) composite));
assertTrue(composite.isAccessible());
assertThat(composite.capacity()).isEqualTo(16);
}
@ -612,7 +612,7 @@ public class BufferCompositionTest extends BufferTestSupport {
throw new RuntimeException("Expected.");
};
try {
Statics.unsafeSetDrop(composite, throwingDrop);
Statics.unsafeSetDrop((ResourceSupport<?, ?>) composite, throwingDrop);
} catch (Exception e) {
composite.close();
throw e;