The Java DTrace API source is now available on OpenSolaris in on/usr/src/lib/libdtrace_jni. This programming interface to the native DTrace library is intended to support the development of visualization tools written in Java. It allows multiple consumers of DTrace data to run simultaneously within a single JVM. Each consumer notifies listeners of data generated by probe actions and lets you request consistent snapshots of aggregations. If you install SUNWdtrc, you can find the jar and the javadoc here: /usr/share/lib/java/dtrace.jar /usr/share/lib/java/javadoc/dtrace/api/index.html Be sure to check out the "API Diagram" and "Quick Start Guide" in the Related Documuntation section of the javadoc package summary. Thanks, Tom