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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 java.io.File;
import java.io.FileInputStream;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import io.netty.channel.DefaultFileRegion;
class FileServerHandler extends ChannelInboundMessageHandlerAdapter<String> {
PathResolver pResolver;
public FileServerHandler(PathResolver pResolver){
this.pResolver = pResolver;
}
@Override
public void messageReceived(ChannelHandlerContext ctx, String blockId) {
String path = pResolver.getAbsolutePath(blockId);
// if getFilePath returns null, close the channel
if (path == null) {
//ctx.close();
return;
}
File file = new File(path);
if (file.exists()) {
if (!file.isFile()) {
//logger.info("Not a file : " + file.getAbsolutePath());
ctx.write(new FileHeader(0, blockId).buffer());
ctx.flush();
return;
}
long length = file.length();
if (length > Integer.MAX_VALUE || length <= 0) {
//logger.info("too large file : " + file.getAbsolutePath() + " of size "+ length);
ctx.write(new FileHeader(0, blockId).buffer());
ctx.flush();
return;
}
int len = new Long(length).intValue();
//logger.info("Sending block "+blockId+" filelen = "+len);
//logger.info("header = "+ (new FileHeader(len, blockId)).buffer());
ctx.write((new FileHeader(len, blockId)).buffer());
try {
ctx.sendFile(new DefaultFileRegion(new FileInputStream(file)
.getChannel(), 0, file.length()));
} catch (Exception e) {
//logger.warning("Exception when sending file : " + file.getAbsolutePath());
e.printStackTrace();
}
} else {
//logger.warning("File not found: " + file.getAbsolutePath());
ctx.write(new FileHeader(0, blockId).buffer());
}
ctx.flush();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}
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