class DynamoDbFramework::Namespace::MigrationManager
Attributes
dynamodb_repository[R]
dynamodb_table_manager[R]
Public Class Methods
new(store)
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# File lib/dynamodb_framework/dynamodb_namespace_migration_manager.rb, line 8 def initialize(store) @dynamodb_repository = DynamoDbFramework::Repository.new(store) @dynamodb_table_manager = DynamoDbFramework::TableManager.new(store) end
Public Instance Methods
apply(namespace)
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# File lib/dynamodb_framework/dynamodb_namespace_migration_manager.rb, line 44 def apply(namespace) DynamoDbFramework.logger.info "[#{self.class}] - Applying migration scripts" executed_scripts = get_executed_scripts(namespace) scripts = [] DynamoDbFramework::MigrationScript.descendants.each do |ms| script = ms.new scripts.push(script) end scripts.sort { |a,b| a.timestamp <=> b.timestamp }.each do |script| if executed_scripts == nil || !executed_scripts.include?(script.timestamp) DynamoDbFramework.logger.info "[#{self.class}] - Applying script: #{script.timestamp}....." script.apply @dynamodb_repository.put({ :timestamp => script.timestamp, :namespace => script.namespace }) end end DynamoDbFramework.logger.info "[#{self.class}] - Migration scripts applied." end
connect()
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# File lib/dynamodb_framework/dynamodb_namespace_migration_manager.rb, line 13 def connect DynamoDbFramework.logger.info "[#{self.class}] - Connecting to DynamoDb instance" migration_table_name = 'dynamodb_framework_migration_history' #check if migration table exists if !@dynamodb_table_manager.exists?(migration_table_name) #migration table not found so create it builder = DynamoDbFramework::AttributesBuilder.new builder.add(:namespace, :S, :partition) builder.add(:timestamp, :S, :range) @dynamodb_table_manager.create_table(name: migration_table_name, attributes: builder.attributes) end #set the table name for the repository @dynamodb_repository.table_name = migration_table_name DynamoDbFramework.logger.info "[#{self.class}] - Connected." end
get_executed_scripts(namespace)
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# File lib/dynamodb_framework/dynamodb_namespace_migration_manager.rb, line 35 def get_executed_scripts(namespace) scripts = @dynamodb_repository.query(:namespace, namespace) if scripts.length > 0 return scripts.sort { |a,b| b['timestamp'] <=> a['timestamp'] }.map { |i| i['timestamp'] } end return nil end
rollback(namespace)
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# File lib/dynamodb_framework/dynamodb_namespace_migration_manager.rb, line 68 def rollback(namespace) DynamoDbFramework.logger.info "[#{self.class}] - Rolling back started." executed_scripts = get_executed_scripts(namespace) scripts = [] DynamoDbFramework::MigrationScript.descendants.each do |ms| script = ms.new scripts.push(script) end scripts.sort { |a,b| a.timestamp <=> b.timestamp }.each do |script| if executed_scripts != nil && executed_scripts.length > 0 && executed_scripts.include?(script.timestamp) script.undo @dynamodb_repository.delete({ :timestamp => script.timestamp, :namespace => script.namespace }) return end end DynamoDbFramework.logger.info "[#{self.class}] - Rollback complete." end