/*
* Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
* Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, version 2.1 only,
* as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.lttng.ust.agent.client;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.lttng.ust.agent.client.SessiondCommand.CommandType;
/**
* Header of session daemon commands.
*
* @author Alexandre Montplaisir
* @author David Goulet
*/
class SessiondCommandHeader {
/** ABI size of command header. */
public static final int HEADER_SIZE = 16;
/** Payload size in bytes following this header. */
private final long dataSize;
/** Command type. */
private final CommandType cmd;
public SessiondCommandHeader(byte[] data) {
ByteBuffer buf = ByteBuffer.wrap(data);
buf.order(ByteOrder.BIG_ENDIAN);
dataSize = buf.getLong();
cmd = CommandType.values()[buf.getInt() - 1];
buf.getInt(); // command version, currently unused
}
public long getDataSize() {
return dataSize;
}
public CommandType getCommandType() {
return cmd;
}
}