On Mon, 20 Jun 2022 16:45:39 -0400 Alexander Aring <aahringo@xxxxxxxxxx> wrote: Hi Alexander! > This patch adds basic java bindings for libtracecmd. It currently > supports very basic handling of parsing trace-cmd recorded trace files. > There might of course additional improvements regarding swig bindings and > the memory handling. E.g. in javas builtin iterator for-each handling > everything will keep in memory. The license for the high-level java > bindings jar file is LGPL-2.1 and is the same as libtracecmd. > > The author of this patch created a java application that uses those java > bindings to trace locks and represent them in graphical GANTT diagram, > see [0]. > > You need to set the JAVA_HOME environment variable to let the Makefile know > that it builds the java bindings. This is somehow standard in the java world > as replacement for pkg-config or similar. There should no trace-cmd java > dependency, the recommended way should be to provide a kind of trace-cmd-java > package from your distribution containing the tracecmd.jar and > libctracecmdjava.so. This package would have then a java dependency to > e.g. OpenJDK, that I was using to test those bindings for. > > The author is not a swig expert but it works as it currently is. Also > the author did not hit issues because memory _yet_. Those are beginning > experimental bindings and can be changed/improved in future. Are you "the author"? Could you rephrase this better? Like: "There may be better ways to do this with swig, but this appears to work as is, as there were no issues because of memory _yet_." That is, please try to rewrite the change log without referring to yourself. > > [0] https://gitlab.com/netcoder/dlm2slog2 > Signed-off-by: Alexander Aring <aahringo@xxxxxxxxxx> > --- > .gitignore | 4 + > Makefile | 60 ++++++- > java/Makefile | 39 +++++ > java/TraceCmd.java | 236 +++++++++++++++++++++++++ > java/TraceCmdEvent.java | 277 ++++++++++++++++++++++++++++++ > java/TraceCmdException.java | 16 ++ > java/TraceCmdField.java | 104 +++++++++++ > java/ctracecmdjava.i | 180 +++++++++++++++++++ > java/example/Makefile | 7 + > java/example/TraceCmdExample.java | 33 ++++ > 10 files changed, 953 insertions(+), 3 deletions(-) > create mode 100644 java/Makefile > create mode 100644 java/TraceCmd.java > create mode 100644 java/TraceCmdEvent.java > create mode 100644 java/TraceCmdException.java > create mode 100644 java/TraceCmdField.java > create mode 100644 java/ctracecmdjava.i > create mode 100644 java/example/Makefile > create mode 100644 java/example/TraceCmdExample.java > I'm not a swig nor Java expert, and will likely not even test this code. But I'm happy to include it if it doesn't break anything that I do test. But if anyone complains of breakage, I'll simply point them to you ;-) Are you OK with that? Hmm, I should add a MAINTAINERS file to add people that support different portions of trace-cmd. -- Steve
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