org.apache.hudi.org.apache.hbase.thirdparty.io.netty.handler.pcap.PcapWriter Maven / Gradle / Ivy
/*
* Copyright 2020 The Netty Project
*
* The Netty Project 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:
*
* https://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 org.apache.hbase.thirdparty.io.netty.handler.pcap;
import org.apache.hbase.thirdparty.io.netty.buffer.ByteBuf;
import org.apache.hbase.thirdparty.io.netty.util.internal.logging.InternalLogger;
import org.apache.hbase.thirdparty.io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.Closeable;
import java.io.IOException;
import java.io.OutputStream;
final class PcapWriter implements Closeable {
/**
* Logger
*/
private static final InternalLogger logger = InternalLoggerFactory.getInstance(PcapWriter.class);
/**
* {@link OutputStream} where we'll write Pcap data.
*/
private final OutputStream outputStream;
/**
* Set to {@code true} if {@link #outputStream} is closed.
*/
private boolean isClosed;
/**
* This uses {@link OutputStream} for writing Pcap.
* Pcap Global Header is not written on construction.
*/
PcapWriter(OutputStream outputStream) {
this.outputStream = outputStream;
}
/**
* This uses {@link OutputStream} for writing Pcap.
* Pcap Global Header is also written on construction.
*
* @throws IOException If {@link OutputStream#write(byte[])} throws an exception
*/
PcapWriter(OutputStream outputStream, ByteBuf byteBuf) throws IOException {
this.outputStream = outputStream;
PcapHeaders.writeGlobalHeader(byteBuf);
byteBuf.readBytes(outputStream, byteBuf.readableBytes());
}
/**
* Write Packet in Pcap OutputStream.
*
* @param packetHeaderBuf Packer Header {@link ByteBuf}
* @param packet Packet
* @throws IOException If {@link OutputStream#write(byte[])} throws an exception
*/
void writePacket(ByteBuf packetHeaderBuf, ByteBuf packet) throws IOException {
if (isClosed) {
logger.debug("Pcap Write attempted on closed PcapWriter");
}
long timestamp = System.currentTimeMillis();
PcapHeaders.writePacketHeader(
packetHeaderBuf,
(int) (timestamp / 1000L),
(int) (timestamp % 1000L * 1000L),
packet.readableBytes(),
packet.readableBytes()
);
packetHeaderBuf.readBytes(outputStream, packetHeaderBuf.readableBytes());
packet.readBytes(outputStream, packet.readableBytes());
}
@Override
public void close() throws IOException {
if (isClosed) {
logger.debug("PcapWriter is already closed");
} else {
isClosed = true;
outputStream.flush();
outputStream.close();
logger.debug("PcapWriter is now closed");
}
}
}