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Open Exchange Rates Data をMySQL にレプリケーションするPowerShell スクリプト

PowerShell でシンプルなスクリプトを記述し、Open Exchange Rates data をMySQL データベースにレプリケーション(複製)。

CData Cmdlets for Open Exchange Rates をつかって、PowerShell からリアルタイムOpen Exchange Rates data に連携できます。データ同期などのタスクの連携にぴったりの製品です。 本記事では、PowerShell からCData Cmdlets for Open Exchange Rates およびCData Cmdlets for MySQL を使って、同期スクリプトを作成して実行します。

After obtaining the needed connection properties, accessing Open Exchange Rates data in PowerShell and preparing for replication consists of four basic steps.

Open Exchange Rates API は、App Id によるBasic 認証をサポートしています。 登録すると、App Id がアカウントダッシュボードに表示されます。 これをAppId 接続プロパティに設定してください。

Collecting Open Exchange Rates Data

  1. Install the module:

    Install-Module OpenExchangeRatesCmdlets
  2. Connect to Open Exchange Rates:

    $openexchangerates = Connect-OpenExchangeRates -AppId $AppId
  3. Retrieve the data from a specific resource:

    $data = Select-OpenExchangeRates -Connection $openexchangerates -Table "Projects"

    You can also use the Invoke-OpenExchangeRates cmdlet to execute pure SQL-92 statements:

    $data = Invoke-OpenExchangeRates -Connection $openexchangerates -Query 'SELECT * FROM Projects WHERE Id = @Id' -Params @{'@Id'='MyProjectId'}
  4. Save a list of the column names from the returned data.

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name

Inserting Open Exchange Rates Data into the MySQL Database

With the data and column names collected, you are ready to replicate the data into a MySQL database.

  1. Install the module:

    Install-Module MySQLCmdlets
  2. Connect to MySQL, using the server address and port of the MySQL server, valid user credentials, and a specific database with the table in which the data will be replicated:

    $mysql = Connect-MySQL -User $User -Password $Password -Database $Database -Server $Server -Port $Port
  3. Loop through the Open Exchange Rates data, store the values, and use the Add-MySQL cmdlet to insert the data into the MySQL database, one row at a time. In this example, the table will need to have the same name as the Open Exchange Rates resource (Projects) and to exist in the database.

    $data | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Projects" -Columns $columns -Values $values }

You have now replicated your Open Exchange Rates data to a MySQL database. This gives you freedom to work with Open Exchange Rates data in the same way that you work with other MySQL tables, whether that is performing analytics, building reports, or other business functions.

Notes

  • Once you have connected to Open Exchange Rates and MySQL in PowerShell, you can pipe command results to perform the replication in a single line:

    Select-OpenExchangeRates -Connection $openexchangerates -Table "Projects" | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Projects" -Columns $columns -Values $values }
  • If you wish to replicate the Open Exchange Rates data to another database using another PowerShell module, you will want to exclude the Columns, Connection, and Table columns from the data returned by the Select-OpenExchangeRates cmdlet since those columns are used to help pipe data from one CData cmdlet to another:

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name | ? {$_ -NotIn @('Columns','Connection','Table')}
 
 
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