com.google.protobuf.BufferAllocator Maven / Gradle / Ivy
// Protocol Buffers - Google's data interchange format
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package com.google.protobuf;
import java.nio.ByteBuffer;
/**
* An object responsible for allocation of buffers. This is an extension point to enable buffer
* pooling within an application.
*/
@CheckReturnValue
@ExperimentalApi
abstract class BufferAllocator {
private static final BufferAllocator UNPOOLED =
new BufferAllocator() {
@Override
public AllocatedBuffer allocateHeapBuffer(int capacity) {
return AllocatedBuffer.wrap(new byte[capacity]);
}
@Override
public AllocatedBuffer allocateDirectBuffer(int capacity) {
return AllocatedBuffer.wrap(ByteBuffer.allocateDirect(capacity));
}
};
/** Returns an unpooled buffer allocator, which will create a new buffer for each request. */
public static BufferAllocator unpooled() {
return UNPOOLED;
}
/** Allocates a buffer with the given capacity that is backed by an array on the heap. */
public abstract AllocatedBuffer allocateHeapBuffer(int capacity);
/** Allocates a direct (i.e. non-heap) buffer with the given capacity. */
public abstract AllocatedBuffer allocateDirectBuffer(int capacity);
}