| 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 | |
| 23 | import org.lttng.ust.agent.AbstractLttngAgent; |
| 24 | |
| 25 | class SessiondDisableHandler implements ISessiondResponse, ISessiondCommand { |
| 26 | |
| 27 | private static final int INT_SIZE = 4; |
| 28 | |
| 29 | /** Event name to disable from the tracing session */ |
| 30 | private String eventName; |
| 31 | |
| 32 | /** Return status code to the session daemon. */ |
| 33 | private LttngAgentRetCode code; |
| 34 | |
| 35 | @Override |
| 36 | public void populate(byte[] data) { |
| 37 | ByteBuffer buf = ByteBuffer.wrap(data); |
| 38 | buf.order(ByteOrder.LITTLE_ENDIAN); |
| 39 | eventName = new String(data).trim(); |
| 40 | } |
| 41 | |
| 42 | @Override |
| 43 | public byte[] getBytes() { |
| 44 | byte data[] = new byte[INT_SIZE]; |
| 45 | ByteBuffer buf = ByteBuffer.wrap(data); |
| 46 | buf.order(ByteOrder.BIG_ENDIAN); |
| 47 | buf.putInt(code.getCode()); |
| 48 | return data; |
| 49 | } |
| 50 | |
| 51 | public String getEventName() { |
| 52 | return eventName; |
| 53 | } |
| 54 | |
| 55 | public void setRetCode(LttngAgentRetCode code) { |
| 56 | this.code = code; |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Execute disable handler action which is to disable the given handler to |
| 61 | * the received name. |
| 62 | * |
| 63 | * @param agent |
| 64 | * The agent on which to execute the command |
| 65 | */ |
| 66 | public void execute(AbstractLttngAgent<?> agent) { |
| 67 | if (agent.eventDisabled(this.eventName)) { |
| 68 | this.code = LttngAgentRetCode.CODE_SUCCESS_CMD; |
| 69 | } else { |
| 70 | this.code = LttngAgentRetCode.CODE_INVALID_CMD; |
| 71 | } |
| 72 | } |
| 73 | } |