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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 spark.network.netty;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundByteHandlerAdapter;
abstract class FileClientHandler extends ChannelInboundByteHandlerAdapter {
private FileHeader currentHeader = null;
private volatile boolean handlerCalled = false;
public boolean isComplete() {
return handlerCalled;
}
public abstract void handle(ChannelHandlerContext ctx, ByteBuf in, FileHeader header);
public abstract void handleError(String blockId);
@Override
public ByteBuf newInboundBuffer(ChannelHandlerContext ctx) {
// Use direct buffer if possible.
return ctx.alloc().ioBuffer();
}
@Override
public void inboundBufferUpdated(ChannelHandlerContext ctx, ByteBuf in) {
// get header
if (currentHeader == null && in.readableBytes() >= FileHeader.HEADER_SIZE()) {
currentHeader = FileHeader.create(in.readBytes(FileHeader.HEADER_SIZE()));
}
// get file
if(in.readableBytes() >= currentHeader.fileLen()) {
handle(ctx, in, currentHeader);
handlerCalled = true;
currentHeader = null;
ctx.close();
}
}
}
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