Move liblttng-ust-java* to 'src/lib/'

[lttng-ust.git] / src / lib / lttng-ust-java-agent / java / lttng-ust-agent-common / org / lttng / ust / agent / client / SessiondEnableAppContextCommand.java

diff --git a/src/lib/lttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableAppContextCommand.java b/src/lib/lttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableAppContextCommand.java
new file mode 100644 (file)
index 0000000..d0be8cf
--- /dev/null
+++ b/src/lib/lttng-ust-java-agent/java/lttng-ust-agent-common/org/lttng/ust/agent/client/SessiondEnableAppContextCommand.java
@@ -0,0 +1,53 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ * Copyright (C) 2016 EfficiOS Inc.
+ * Copyright (C) 2016 Alexandre Montplaisir <alexmonthy@efficios.com>
+ */
+
+package org.lttng.ust.agent.client;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+/**
+ * Session daemon command indicating to the Java agent that an
+ * application-specific context was enabled in the tracing session.
+ *
+ * @author Alexandre Montplaisir
+ */
+class SessiondEnableAppContextCommand extends SessiondCommand {
+
+       private final String retrieverName;
+       private final String contextName;
+
+       private final boolean commandIsValid;
+
+       public SessiondEnableAppContextCommand(byte[] data) {
+               if (data == null) {
+                       throw new IllegalArgumentException();
+               }
+               ByteBuffer buf = ByteBuffer.wrap(data);
+               buf.order(ByteOrder.BIG_ENDIAN);
+
+               /*
+                * The buffer contains the retriever name first, followed by the
+                * context's name.
+                */
+               retrieverName = readNextString(buf);
+               contextName = readNextString(buf);
+
+               /* If any of these strings were null then the command was invalid */
+               commandIsValid = ((retrieverName != null) && (contextName != null));
+       }
+
+       @Override
+       public LttngAgentResponse execute(ILttngTcpClientListener agent) {
+               if (!commandIsValid) {
+                       return LttngAgentResponse.FAILURE_RESPONSE;
+               }
+
+               boolean success = agent.appContextEnabled(retrieverName, contextName);
+               return (success ? LttngAgentResponse.SUCESS_RESPONSE : LttngAgentResponse.FAILURE_RESPONSE);
+       }
+}