-/*
- * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-
-package org.opendaylight.controller.netconf.util.handler;
-
-import io.netty.buffer.ByteBuf;
-import io.netty.buffer.Unpooled;
-import io.netty.channel.ChannelHandlerContext;
-import io.netty.handler.codec.MessageToByteEncoder;
-
-import org.opendaylight.controller.netconf.util.messages.NetconfMessageConstants;
-import org.opendaylight.controller.netconf.util.messages.NetconfMessageHeader;
-
-import com.google.common.base.Preconditions;
-
-public class ChunkedFramingMechanismEncoder extends MessageToByteEncoder<ByteBuf> {
- public static final int DEFAULT_CHUNK_SIZE = 8192;
- public static final int MIN_CHUNK_SIZE = 128;
- public static final int MAX_CHUNK_SIZE = 16 * 1024 * 1024;
-
- private final int chunkSize;
-
- public ChunkedFramingMechanismEncoder() {
- this(DEFAULT_CHUNK_SIZE);
- }
-
- public ChunkedFramingMechanismEncoder(int chunkSize) {
- Preconditions.checkArgument(chunkSize > MIN_CHUNK_SIZE);
- Preconditions.checkArgument(chunkSize < MAX_CHUNK_SIZE);
- this.chunkSize = chunkSize;
- }
-
- public final int getChunkSize() {
- return chunkSize;
- }
-
- @Override
- protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) {
- while (msg.readableBytes() > chunkSize) {
- ByteBuf chunk = Unpooled.buffer(chunkSize);
- chunk.writeBytes(createChunkHeader(chunkSize));
- chunk.writeBytes(msg.readBytes(chunkSize));
- ctx.write(chunk);
- }
- out.writeBytes(createChunkHeader(msg.readableBytes()));
- out.writeBytes(msg.readBytes(msg.readableBytes()));
- out.writeBytes(NetconfMessageConstants.END_OF_CHUNK);
- }
-
- private ByteBuf createChunkHeader(int chunkSize) {
- return Unpooled.wrappedBuffer(NetconfMessageHeader.toBytes(chunkSize));
- }
-}