Move to kernel style SPDX license identifiers

[lttng-ust.git] / liblttng-ust-java-agent / java / lttng-ust-agent-common / org / lttng / ust / agent / client / SessiondEnableEventCommand.java

diff --git a/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableEventCommand.java b/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableEventCommand.java
index 82204eb19b895af2d22eca200169769f40d59114..35029c9bd5712067fd0d0f1d122460cc47e59127 100644 (file)
--- a/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableEventCommand.java
+++ b/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableEventCommand.java
@@ -1,19 +1,9 @@
 /*
- * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
- * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * 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
+ * Copyright (C) 2015 EfficiOS Inc.
+ * Copyright (C) 2015 Alexandre Montplaisir <alexmonthy@efficios.com>
+ * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
  */
 
 package org.lttng.ust.agent.client;
@@ -21,6 +11,9 @@ package org.lttng.ust.agent.client;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 
+import org.lttng.ust.agent.session.EventRule;
+import org.lttng.ust.agent.session.LogLevelSelector;
+
 /**
  * Session daemon command indicating to the Java agent that some events were
  * enabled in the tracing session.
@@ -28,29 +21,57 @@ import java.nio.ByteOrder;
  * @author Alexandre Montplaisir
  * @author David Goulet
  */
-class SessiondEnableEventCommand implements ISessiondCommand {
+class SessiondEnableEventCommand extends SessiondCommand {
+
+       /** Fixed event name length. Value defined by the lttng agent protocol. */
+       private static final int EVENT_NAME_LENGTH = 256;
 
-       private static final int INT_SIZE = 4;
+       private final boolean commandIsValid;
 
-       /** Event name to enable in the tracing session */
+       /* Parameters of the event rule being enabled */
        private final String eventName;
+       private final LogLevelSelector logLevelFilter;
+       private final String filterString;
 
        public SessiondEnableEventCommand(byte[] data) {
                if (data == null) {
                        throw new IllegalArgumentException();
                }
-               int dataOffset = INT_SIZE * 2;
-
                ByteBuffer buf = ByteBuffer.wrap(data);
-               buf.order(ByteOrder.LITTLE_ENDIAN);
-               buf.getInt(); // logLevel, currently unused
-               buf.getInt(); // logLevelType, currently unused
-               eventName = new String(data, dataOffset, data.length - dataOffset).trim();
+               buf.order(ByteOrder.BIG_ENDIAN);
+               int logLevel = buf.getInt();
+               int logLevelType = buf.getInt();
+               logLevelFilter = new LogLevelSelector(logLevel, logLevelType);
+
+               /* Read the event name */
+               byte[] eventNameBytes = new byte[EVENT_NAME_LENGTH];
+               buf.get(eventNameBytes);
+               eventName = new String(eventNameBytes, SESSIOND_PROTOCOL_CHARSET).trim();
+
+               /* Read the filter string */
+               filterString = readNextString(buf);
+
+               /* The command was invalid if the string could not be read correctly */
+               commandIsValid = (filterString != null);
        }
 
        @Override
        public LttngAgentResponse execute(ILttngTcpClientListener agent) {
-               boolean success = agent.eventEnabled(this.eventName);
+               if (!commandIsValid) {
+                       return LttngAgentResponse.FAILURE_RESPONSE;
+               }
+
+               EventRule rule = new EventRule(eventName, logLevelFilter, filterString);
+               boolean success = agent.eventEnabled(rule);
                return (success ? LttngAgentResponse.SUCESS_RESPONSE : LttngAgentResponse.FAILURE_RESPONSE);
        }
+
+       @Override
+       public String toString() {
+               return "SessiondEnableEventCommand["
+                               + "eventName=" + eventName
+                               + ", logLevel=" + logLevelFilter.toString()
+                               + ", filterString=" + filterString
+                               +"]";
+       }
 }