package io.eguan.nbdsrv.packet;
/*
* #%L
* Project eguan
* %%
* Copyright (C) 2012 - 2017 Oodrive
* %%
* Licensed 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.
* #L%
*/
import io.eguan.utils.ByteBufferCache;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* Caches {@link ByteBuffer}s for the NBD server.
*
* @author oodrive
* @author llambert
*
*/
public final class NbdByteBufferCache {
// Allocate direct buffers for data only, needs big endian to read network integers
private static final ByteBufferCache BYTE_BUFFER_CACHE = new ByteBufferCache(Utils.MAX_HEADER_SIZE,
ByteOrder.BIG_ENDIAN);
/**
* No instance.
*/
private NbdByteBufferCache() {
throw new Error();
}
/**
* Allocate a new buffer
*
* @param capacity
* @return the new allocated or reused buffer. May not be filled with 0.
*/
public static final ByteBuffer allocate(final int capacity) {
return BYTE_BUFFER_CACHE.allocate(capacity);
}
/**
* Release a buffer and make it available for reuse.
*
* @param buffer
* buffer to release
*/
public static final void release(final ByteBuffer buffer) {
BYTE_BUFFER_CACHE.release(buffer);
}
}