| #!/usr/bin/env python |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| |
| """ |
| |
| This file defines the interface that can be used to |
| fetch and update system configuration information, |
| as well as the data object returned by the |
| |
| """ |
| import os |
| |
| from gppylib.gplog import * |
| from gppylib.utils import checkNotNone |
| |
| logger = get_default_logger() |
| |
| class GpConfigurationProvider : |
| """ |
| An implementation of GpConfigurationProvider will provide functionality |
| to fetch and update gpdb system configuration information (as stored in the database) |
| """ |
| |
| def __init__(self): |
| pass |
| |
| def initializeProvider( self, masterPort ) : |
| """ |
| Initialize the provider to get information from the given master db, if it chooses to |
| get its data from the database |
| |
| returns self |
| """ |
| |
| return self |
| |
| def loadSystemConfig( self, useUtilityMode ) : |
| """ |
| Load all segment information from the configuration source. |
| |
| Returns a new GpArray object |
| """ |
| pass |
| |
| def sendPgElogFromMaster( self, msg, sendAlerts): |
| """ |
| Send a message from the master database using select pg_elog ... |
| """ |
| pass |
| |
| def updateSystemConfig( self, systemConfiguration, textForConfigTable, dbIdToForceMirrorRemoveAdd, useUtilityMode ) : |
| """ |
| |
| Update the configuration for the given segments in the underlying configuration store |
| to match the current values |
| |
| Also resets any dirty bits on saved/updated objects |
| |
| """ |
| pass |
| |
| """ |
| Management of registered configuration provider. Right now it |
| is a singleton, so initializeDatabase calls _could_ mess up |
| the singleton for other parts of code. Perhaps switch later |
| to a factory |
| """ |
| gConfigurationProvider = None |
| def registerConfigurationProvider(provider): |
| global gConfigurationProvider |
| gConfigurationProvider = checkNotNone("New global configuration provider", provider) |
| |
| def getConfigurationProvider(): |
| global gConfigurationProvider |
| return checkNotNone("Global configuration provider", gConfigurationProvider) |