--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/redhat/thermostat/agent/JvmStatusListener.java	Tue Jan 17 15:37:30 2012 -0500
@@ -0,0 +1,8 @@
+package com.redhat.thermostat.agent;
+
+public interface JvmStatusListener {
+
+    public void jvmStarted(int pid);
+
+    public void jvmStopped(int pid);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/redhat/thermostat/agent/JvmStatusNotifier.java	Tue Jan 17 15:37:30 2012 -0500
@@ -0,0 +1,19 @@
+package com.redhat.thermostat.agent;
+
+public interface JvmStatusNotifier {
+
+    /**
+     * Request to be informed when JVM processes are started or stopped.
+     * 
+     * @param listener the receiver of future {@link JvmStatusListener.jvmStarted()}
+     * and {@link JvmStatusListener.jvmStopped()} calls
+     */
+    public void addJvmStatusListener(JvmStatusListener listener);
+
+    /**
+     * Request to no longer be informed when JVM processes are started or stopped.
+     * @param listener the {@link JvmStatusListener} to be unregistered.
+     */
+    public void removeJvmStatusListener(JvmStatusListener listener);
+
+}