liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondDisableEventCommand.java

   1 /*
   2  * SPDX-License-Identifier: LGPL-2.1-only
   3  *
   4  * Copyright (C) 2015 EfficiOS Inc.
   5  * Copyright (C) 2015 Alexandre Montplaisir <alexmonthy@efficios.com>
   6  * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
   7  */
   8
   9 package org.lttng.ust.agent.client;
  10
  11 import java.nio.ByteBuffer;
  12 import java.nio.ByteOrder;
  13
  14 /**
  15  * Session daemon command indicating to the Java agent that some events were
  16  * disabled in the tracing session.
  17  *
  18  * @author Alexandre Montplaisir
  19  * @author David Goulet
  20  */
  21 class SessiondDisableEventCommand extends SessiondCommand {
  22
  23         /**
  24          * Response sent when the disable-event command asks to disable an
  25          * unknown event.
  26          */
  27         private static final LttngAgentResponse DISABLE_EVENT_FAILURE_RESPONSE = new LttngAgentResponse() {
  28                 @Override
  29                 public ReturnCode getReturnCode() {
  30                         return ReturnCode.CODE_UNKNOWN_LOGGER_NAME;
  31                 }
  32         };
  33
  34         /** Event name to disable from the tracing session */
  35         private final String eventName;
  36
  37         public SessiondDisableEventCommand(byte[] data) {
  38                 if (data == null) {
  39                         throw new IllegalArgumentException();
  40                 }
  41                 ByteBuffer buf = ByteBuffer.wrap(data);
  42                 buf.order(ByteOrder.BIG_ENDIAN);
  43                 eventName = new String(data, SESSIOND_PROTOCOL_CHARSET).trim();
  44         }
  45
  46         @Override
  47         public LttngAgentResponse execute(ILttngTcpClientListener agent) {
  48                 boolean success = agent.eventDisabled(this.eventName);
  49                 return (success ? LttngAgentResponse.SUCESS_RESPONSE : DISABLE_EVENT_FAILURE_RESPONSE);
  50         }
  51
  52         @Override
  53         public String toString() {
  54                 return "SessiondDisableEventCommand["
  55                                 + "eventName=" + eventName
  56                                 +"]";
  57         }
  58 }