| 1 | /* |
| 2 | * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 11 | * for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public License |
| 14 | * along with this library; if not, write to the Free Software Foundation, |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | package org.lttng.ust.agent.client; |
| 19 | |
| 20 | import java.nio.ByteBuffer; |
| 21 | import java.nio.ByteOrder; |
| 22 | import java.util.ArrayList; |
| 23 | import java.util.List; |
| 24 | |
| 25 | import org.lttng.ust.agent.ILttngAgent; |
| 26 | |
| 27 | class SessiondListLoggersResponse implements ISessiondResponse { |
| 28 | |
| 29 | private final static int SIZE = 12; |
| 30 | |
| 31 | private int dataSize = 0; |
| 32 | private int nbLogger = 0; |
| 33 | |
| 34 | private final List<String> loggerList = new ArrayList<String>(); |
| 35 | |
| 36 | /** Return status code to the session daemon. */ |
| 37 | public LttngAgentRetCode code; |
| 38 | |
| 39 | @Override |
| 40 | public byte[] getBytes() { |
| 41 | byte data[] = new byte[SIZE + dataSize]; |
| 42 | ByteBuffer buf = ByteBuffer.wrap(data); |
| 43 | buf.order(ByteOrder.BIG_ENDIAN); |
| 44 | |
| 45 | /* Returned code */ |
| 46 | buf.putInt(code.getCode()); |
| 47 | buf.putInt(dataSize); |
| 48 | buf.putInt(nbLogger); |
| 49 | |
| 50 | for (String logger : loggerList) { |
| 51 | buf.put(logger.getBytes()); |
| 52 | /* NULL terminated byte after the logger name. */ |
| 53 | buf.put((byte) 0x0); |
| 54 | } |
| 55 | return data; |
| 56 | } |
| 57 | |
| 58 | public void execute(ILttngAgent<?> agent) { |
| 59 | for (String event : agent.listEnabledEvents()) { |
| 60 | this.loggerList.add(event); |
| 61 | this.nbLogger++; |
| 62 | this.dataSize += event.length() + 1; |
| 63 | } |
| 64 | |
| 65 | this.code = LttngAgentRetCode.CODE_SUCCESS_CMD; |
| 66 | } |
| 67 | } |