projects / lttng-ust.git / blame
| Commit | Line | Data |
|---|---|---|
| d60dfbe4 AM |
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 SessiondEnableHandler implements ISessiondResponse, ISessiondCommand { | |
| 26 | ||
| 27 | private static final int INT_SIZE = 4; | |
| 28 | ||
| 29 | /** Event name to enable in the tracing session */ | |
| 30 | private String eventName; | |
| 31 | ||
| 32 | /** Return status code to the session daemon. */ | |
| 33 | public LttngAgentRetCode code; | |
| 34 | ||
| 35 | @Override | |
| 36 | public void populate(byte[] data) { | |
| 37 | int dataOffset = INT_SIZE * 2; | |
| 38 | ||
| 39 | ByteBuffer buf = ByteBuffer.wrap(data); | |
| 40 | buf.order(ByteOrder.LITTLE_ENDIAN); | |
| 41 | buf.getInt(); //logLevel, currently unused | |
| 42 | buf.getInt(); //logLevelType, currently unused | |
| 43 | eventName = new String(data, dataOffset, data.length - dataOffset).trim(); | |
| 44 | } | |
| 45 | ||
| 46 | @Override | |
| 47 | public byte[] getBytes() { | |
| 48 | byte data[] = new byte[INT_SIZE]; | |
| 49 | ByteBuffer buf = ByteBuffer.wrap(data); | |
| 50 | buf.order(ByteOrder.BIG_ENDIAN); | |
| 51 | buf.putInt(code.getCode()); | |
| 52 | return data; | |
| 53 | } | |
| 54 | ||
| 55 | public String getEventName() { | |
| 56 | return eventName; | |
| 57 | } | |
| 58 | ||
| 59 | /** | |
| 60 | * Execute enable handler action which is to enable the given handler to the | |
| 61 | * 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.eventEnabled(this.eventName)) { | |
| 68 | this.code = LttngAgentRetCode.CODE_SUCCESS_CMD; | |
| 69 | } else { | |
| 70 | this.code = LttngAgentRetCode.CODE_INVALID_CMD; | |
| 71 | } | |
| 72 | } | |
| 73 | } |