#!/usr/bin/env python
#
# Public Domain 2014-2016 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
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# of this software dedicate any and all copyright interest in the
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import fnmatch, os, time
import wiredtiger, wttest
from helper import simple_populate

# test_reconfig02.py
#    Smoke-test the connection reconfiguration operations.
class test_reconfig02(wttest.WiredTigerTestCase):
    init_config = 'log=(archive=false,enabled,file_max=100K,prealloc=false,zero_fill=false)'
    uri = "table:reconfig02"
    entries = 1000

    def setUpConnectionOpen(self, dir):
        self.conn_config = self.init_config
        return wttest.WiredTigerTestCase.setUpConnectionOpen(self, dir)

    # Call reconfigure for zero filling a file.  There is nothing
    # we can actually look for to confirm it did anything.
    # Also changing the log file size is a no-op, but should not fail.
    def test_reconfig02_simple(self):
        self.conn.reconfigure("log=(zero_fill=true)")
        self.conn.reconfigure("log=(file_max=1MB)")

    # Test that we get an error if we try to turn logging off.
    def test_reconfig02_disable(self):
        msg = 'Invalid argument'
        gotException = False
        try:
            self.conn.reconfigure("log=(enabled=false)")
        except wiredtiger.WiredTigerError as e:
            gotException = True
            self.pr('got exception: ' + str(e))
            self.assertTrue(str(e).find(msg) >= 0)
        self.assertTrue(gotException)

    # Logging starts on, but prealloc is off.  Verify it is off.
    # Reconfigure it on and run again, making sure that log files
    # get pre-allocated.
    def test_reconfig02_prealloc(self):
        # Create a table just to write something into the log.  Sleep
        # to give the worker thread a chance to run.
        self.session.create(self.uri, 'key_format=i,value_format=i')
        time.sleep(2)
        prep_logs = fnmatch.filter(os.listdir('.'), "*Prep*")
        # Make sure no pre-allocated log files exist.
        self.assertEqual(0, len(prep_logs))

        # Now turn on pre-allocation.  Sleep to give the worker thread
        # a chance to run and verify pre-allocated log files exist.
        #
        # Potentially loop a few times in case it is a very slow system.
        self.conn.reconfigure("log=(prealloc=true)")
        for x in xrange(0, 20):
            time.sleep(1)
            prep_logs = fnmatch.filter(os.listdir('.'), "*Prep*")
            if len(prep_logs) != 0:
                break

        self.assertNotEqual(0, len(prep_logs))

    # Logging starts on, but archive is off.  Verify it is off.
    # Reconfigure it on and run again, making sure that log files
    # get archived.
    def test_reconfig02_archive(self):
        self.session.create(self.uri, 'key_format=i,value_format=i')
        c = self.session.open_cursor(self.uri, None, None)
        for i in range(self.entries):
            c[i] = i + 1
        c.close()
        # Close and reopen connection to write a checkpoint, move to the
        # next log file and verify that archive did not run.
        orig_logs = fnmatch.filter(os.listdir('.'), "*Log*")
        self.reopen_conn()
        cur_logs = fnmatch.filter(os.listdir('.'), "*Log*")
        for o in orig_logs:
            self.assertEqual(True, o in cur_logs)

        # Now turn on archive, sleep a bit to allow the archive thread
        # to run and then confirm that all original logs are gone.
        self.conn.reconfigure("log=(archive=true)")
        time.sleep(2)
        cur_logs = fnmatch.filter(os.listdir('.'), "*Log*")
        for o in orig_logs:
            self.assertEqual(False, o in cur_logs)

if __name__ == '__main__':
    wttest.run()