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How to Trace JVM Filesystem Accesses Using Java

For tracing filesystem accesses of Java applications, native tracing facilities are always the first choice. On Windows, use Process Monitor to trace I/O. On Linux, use strace. Other platforms provide similar facilities.

By tracing directly in Java, you can work around environment limitations. For example, strace is unavailable in a container that lacks the CAP_SYS_PTRACE capability and the container host is not always accessible. Also, a potentially lighter-weight tracing mechanism comes handy for tracing in production environments.

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Java Streams Overview, Part II

In my previous article, I wrote about the fundamentals of streams in Java 8. Now, let's augment our skills with some additional information about streams, like how we can chain them, and we can use them to access files.

Chaining Streams

When working with streams, they are often chained together.