| /* |
| * Copyright 2014 The gRPC Authors |
| * |
| * 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. |
| */ |
| |
| package io.grpc.netty; |
| |
| import com.google.common.base.Preconditions; |
| import io.grpc.internal.AbstractReadableBuffer; |
| import io.netty.buffer.ByteBuf; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * A {@link java.nio.Buffer} implementation that is backed by a Netty {@link ByteBuf}. This class |
| * does not call {@link ByteBuf#retain}, so if that is needed it should be called prior to creating |
| * this buffer. |
| */ |
| class NettyReadableBuffer extends AbstractReadableBuffer { |
| private final ByteBuf buffer; |
| private boolean closed; |
| |
| NettyReadableBuffer(ByteBuf buffer) { |
| this.buffer = Preconditions.checkNotNull(buffer, "buffer"); |
| } |
| |
| ByteBuf buffer() { |
| return buffer; |
| } |
| |
| @Override |
| public int readableBytes() { |
| return buffer.readableBytes(); |
| } |
| |
| @Override |
| public void skipBytes(int length) { |
| buffer.skipBytes(length); |
| } |
| |
| @Override |
| public int readUnsignedByte() { |
| return buffer.readUnsignedByte(); |
| } |
| |
| @Override |
| public void readBytes(byte[] dest, int index, int length) { |
| buffer.readBytes(dest, index, length); |
| } |
| |
| @Override |
| public void readBytes(ByteBuffer dest) { |
| buffer.readBytes(dest); |
| } |
| |
| @Override |
| public void readBytes(OutputStream dest, int length) { |
| try { |
| buffer.readBytes(dest, length); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public NettyReadableBuffer readBytes(int length) { |
| return new NettyReadableBuffer(buffer.readRetainedSlice(length)); |
| } |
| |
| @Override |
| public boolean hasArray() { |
| return buffer.hasArray(); |
| } |
| |
| @Override |
| public byte[] array() { |
| return buffer.array(); |
| } |
| |
| @Override |
| public int arrayOffset() { |
| return buffer.arrayOffset() + buffer.readerIndex(); |
| } |
| |
| /** |
| * If the first call to close, calls {@link ByteBuf#release} to release the internal Netty buffer. |
| */ |
| @Override |
| public void close() { |
| // Don't allow slices to close. Also, only allow close to be called once. |
| if (!closed) { |
| closed = true; |
| buffer.release(); |
| } |
| } |
| } |