X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=liblttng-ust-java-agent%2Fjava%2Flttng-ust-agent-common%2Forg%2Flttng%2Fust%2Fagent%2Fclient%2FSessiondCommandHeader.java;fp=liblttng-ust-java-agent%2Fjava%2Flttng-ust-agent-common%2Forg%2Flttng%2Fust%2Fagent%2Fclient%2FSessiondCommandHeader.java;h=1ce6502b1f5a79c075fa3745329bcd4d015498c7;hb=301a3ddb302c9c2767f41f3b47d2f3e8ca8b9067;hp=0000000000000000000000000000000000000000;hpb=8286ff50af5ad0b39d191e8f89071a3de7ccbdfa;p=lttng-ust.git

diff --git a/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondCommandHeader.java b/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondCommandHeader.java
new file mode 100644
index 00000000..1ce6502b
--- /dev/null
+++ b/liblttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondCommandHeader.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
+ * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
+ *
+ * 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
+ */
+
+package org.lttng.ust.agent.client;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import org.lttng.ust.agent.client.ISessiondCommand.CommandType;
+
+/**
+ * Header of session daemon commands.
+ *
+ * @author Alexandre Montplaisir
+ * @author David Goulet
+ */
+class SessiondCommandHeader {
+
+	/** ABI size of command header. */
+	public static final int HEADER_SIZE = 16;
+
+	/** Payload size in bytes following this header. */
+	private final long dataSize;
+
+	/** Command type. */
+	private final CommandType cmd;
+
+	public SessiondCommandHeader(byte[] data) {
+		ByteBuffer buf = ByteBuffer.wrap(data);
+		buf.order(ByteOrder.BIG_ENDIAN);
+
+		dataSize = buf.getLong();
+		cmd = CommandType.values()[buf.getInt() - 1];
+		buf.getInt(); // command version, currently unused
+	}
+
+	public long getDataSize() {
+		return dataSize;
+	}
+
+	public CommandType getCommandType() {
+		return cmd;
+	}
+}