Date: Sat, 18 Aug 2007 02:25:46 GMT From: Ivan Voras <ivoras@FreeBSD.org> To: Perforce Change Reviews <perforce@FreeBSD.org> Subject: PERFORCE change 125283 for review Message-ID: <200708180225.l7I2PkU5044876@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=125283 Change 125283 by ivoras@ivoras_finstall on 2007/08/18 02:25:15 Framework for asynchronous backend jobs Affected files ... .. //depot/projects/soc2007/ivoras_finstall/pybackend/systoolengine.py#8 edit Differences ... ==== //depot/projects/soc2007/ivoras_finstall/pybackend/systoolengine.py#8 (text+ko) ==== @@ -24,6 +24,7 @@ import os, sys import re import logging +from threading import Thread, Lock import globals import freebsd @@ -51,12 +52,39 @@ return [e] +class SysToolJob(Thread): + """A generic asynchronous SysTool job""" + + def __init__(self): + Thread.__init__(self) + self.finished = False + self.percent_complete = 0 + self.error = None + self.result = None + + def _calc_percent(self, i, total): + return int((float(i+1) / total) * 100) + + +class PartitionJob(SysToolJob): + """A partitioning SysTool job. This one accept a list of partitions + to create and creates them one by one.""" + def __init__(self, part_spec): + SysToolJob.__init__(self) + self.part_spec = part_spec + + def run(self): + for i, part in enumerate(self.part_spec): + self.percent_complete = self._calc_percent(i, len(self.part_spec)) + + class SysToolEngine: - def __init__(self): self.root_dest = "" # Config file / "new" root, sans final slash self.root_live = "" # Live file system root (for binaries!) + self.job_list = [] + self.job_list_lock = Lock() def GetId(self): @@ -250,3 +278,41 @@ physmem = int(freebsd.get_sysctl("hw.realmem")) return int(physmem / (1024*1024)) + + @logexception + def StartPartitionJob(self, part_spec): + """Starts a job that executes a partition spec list. Returns + an integer job_id""" + self.job_list_lock.acquire() + job = PartitionJob(part_spec) + self.job_list.append(job) + job_id = len(self.job_list) # 1-based job IDs + job.start() # fires up a new thread + self.job_list_lock.release() + return job_id + + + @logexception + def QueryJobProgress(self, job_id): + """Queries the progress of a job, returns percent complete or None + if the job is in error""" + self.job_list_lock.acquire() + job = self.job_list[job_id-1] + self.job_list_lock.release() + if job.error != None: + return None + return job.percent_complete + + + @logexception + def QueryJobResult(self, job_id): + """Queries the result of a job, if the job is finished. Returns + a string with the job's status report or None if the job is not + yet finished.""" + self.job_list_lock.acquire() + job = self.job_list[job_id-1] + self.job_list_lock.release() + if not job.finished: + return None + return job.result +
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