Many changes to pipeline.py

[moe.git] / t / moe / pipeline.py

diff --git a/t/moe/pipeline.py b/t/moe/pipeline.py
index 1804c5bec732562b718fee667d0b78c4e606a634..bffca80ffc408e4a900a9c1835b3fe504bdfc3d9 100644 (file)
--- a/t/moe/pipeline.py
+++ b/t/moe/pipeline.py
@@ -1,50 +1,61 @@
 #!/usr/bin/env python
 
-import sys
 import bisect
-import imp
-import moe.log
+import moe
 
-class MoePipeline:
+class MoePipeError(moe.MoeError):
+    """Failure of the MoePipeline."""
+
+class MoeAbortPipeline(Exception):
+
+    def __init__(self, skip_to=999):
+       self.skip_to = skip_to
+
+class Pipeline:
     """Moe pipeline."""
 
-    def __init__(self, name):
+    def __init__(self, e, name, skip_to = 70):
+       # e is Eval
+       self.e = e
         self.pipe = []
        self.index = -1
        self.name = name
+       self.skip_to = skip_to
 
     def insert(self, pri, name, fun):
-       triple = (pri,name,fun)
+       "Insert callable `fun` to time `pri`, `name` is only informative."
+       assert(isinstance(pri, int))
+       assert(callable(fun))
+       triple = (pri, name, fun)
        pos = bisect.bisect(self.pipe, triple)
        if pos <= self.index:
-           raise RuntimeError, "MoePipeline.insert cannot alter the past"
+           raise MoePipeError, "Pipeline %r at time %d: Insert cannot alter the past (time %d)" \
+               % (self.name, self.index, pri)
        self.pipe.insert(pos, triple)
 
-    def dump(self, file=sys.stdout):
-       file.write(">>> Pipeline %s\n" % self.name)
-       for pri,name,fun in self.pipe:
-           file.write("%03d %s\n" % (pri,name))
+    def dump(self, prefix=""):
+       """
+       Debugging dump of the pipe.
+       Returns a list of lines.
+       """
+       l=["%s >>> Pipeline %s\n" % (prefix, self.name)]
+       for pri, name, fun in self.pipe:
+           l.append("%s% 3d %s, %s\n" % (prefix, pri, name, fun))
 
-    def run(self, *args):
+    def run(self, *args, **kwargs):
        self.index = 0
+       min_pri = -1
        while self.index < len(self.pipe):
            (pri,name,fun) = self.pipe[self.index]
-           moe.log.verbose(">> Running %s:%s\n" % (self.name,name))
-           fun(*args)
+           if pri >= min_pri:
+               self.e.log.debug("Pipeline %r:%d running: %s\n" % (self.name, pri, name))
+               try:
+                   fun(*args, **kwargs)
+               except MoeAbortPipeline, err:
+                   min_pri = self.skip_to
+           else:
+               self.e.log.debug("Pipeline %r:d skipping: %s\n" % (self.name, pri, name))
            self.index += 1
        self.index = -1
+       self.e.log.debug("Pipeline %r finished\n" % (self.name))
 
-    def add_hook(self, name):
-       modname = "moe.hooks." + name
-       moe.log.verbose(">> Loading hook %s\n" % name)
-       if not sys.modules.has_key(modname):
-           fp, path, desc = imp.find_module(name, ["moe/hooks"])
-           try:
-               imp.load_module(modname, fp, path, desc)
-           finally:
-               fp.close()
-       sys.modules[modname].init(self)
-
-    def configure(self, names):
-       for name in names.split():
-           self.add_hook(name)