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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.fs4;
import java.nio.ByteBuffer;
import com.yahoo.fs4.mplex.FS4Channel;
import com.yahoo.search.Query;
/**
* Adds packets to the query context
*
* @author tonytv
*/
public class PacketQueryTracer implements PacketListener {
private final static int traceLevel = 10;
private void addTrace(FS4Channel channel, BasicPacket packet, ByteBuffer serializedForm) {
Query query = channel.getQuery();
if (query != null && query.getTraceLevel() >= traceLevel) {
StringBuilder traceString = new StringBuilder();
traceString.append(packet.getClass().getSimpleName()).append(": ");
hexDump(serializedForm, traceString);
final boolean includeQuery = true;
query.trace(traceString.toString(), includeQuery, traceLevel);
}
}
private void hexDump(ByteBuffer serializedForm, StringBuilder traceString) {
HexByteIterator hexByteIterator = new HexByteIterator(serializedForm);
long count = 0;
final int maxNumCharacters = 80;
while (hexByteIterator.hasNext()) {
if (++count % maxNumCharacters == 0)
traceString.append('\n');
traceString.append(hexByteIterator.next());
}
}
@Override
public void packetSent(FS4Channel channel, BasicPacket packet, ByteBuffer serializedForm) {
addTrace(channel, packet, serializedForm);
}
@Override
public void packetReceived(FS4Channel channel, BasicPacket packet, ByteBuffer serializedForm) {
addTrace(channel, packet, serializedForm);
}
}
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