Changes between Version 3 and Version 4 of PythonAppDev

Timestamp:

Sep 20, 2007, 8:23:14 AM (17 years ago)

Author:

davea

Comment:

--

PythonAppDev

@@ -59 +59 @@
 }}}
  * This command may take a long time.  If it's aborted via !^C, it may be repeated later. In that case no new jobs are created, and the master waits for the completion of the remaining slaves.
+
+
+== Implementation ==
+
+PyBOINC uses the following files and subdirectories in the job directory:
+
+ * pyboinc_checkpoint: If present, this contains a job ID
+ * new/: result files not yet handled
+ * old/: result files already handled
+
+Pseudocode for the various PyBOINC functions:
+{{{
+static jobID
+
+pyboinc_call(slave_filename, input)
+    create a uniquely-named file x in the download hierarchy
+    Pickler(x).dump(input)
+    create_work()
+
+pyboinc_master(make_calls, handle_result)
+    read jobID from pyboinc_checkpoint
+    if none
+        create a batch record; jobID = its ID
+        make_calls()
+        write jobID to checkpoint file
+    move all files from old/ to new/
+    while (not all jobs done)
+        if there is a file x in new/
+            output = Pickler.load(x)
+            handle_result(output)
+        else
+            sleep(1)
+
+pyboinc_get_input()
+    boinc_resolve_filename("input", infile)
+    return Pickler.load(infile)
+
+pyboinc_return_output(output)
+    boinc_resolve_filename("output", outfile)
+    Pickler(outfile).dump(output)