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MySQL is a relational database that can be used to store user generated content (UGC).

These instructions describe how to connect to the MySQL server and establish the UGC database.

Requirements

Installing MySQL

MySQL should be downloaded and installed following the instructions for the target OS.

Lower case table names

As SQL is case insensitive, for case sensitive operating systems, it is necessary to include a setting to lower case all table names.

For example, to specify all lower case table names on a Linux OS :

  • edit file /etc/my.cnf
  • in the [mysqld] section, add the following line :
      lower_case_table_names = 1

UTF8 character set

To provide better multilingual support, it is necessary to use the UTF8 character set.

Change MySQL to have UTF8 as its character set :

  • mysql> SET NAMES 'utf8';

Change the MySQL database to default to UTF8 :

  • edit file /etc/my.cnf
  • in the [client] section, add the following line:
      default-character-set=utf8
  • in the [mysqld] section, add the following line:
      character-set-server=utf8

Installing MySQL Workbench

MySQL Workbench provides an UI for executing SQL scripts which install the schema and initial data. 

MySQL Workbench should be downloaded and installed following the instructions for the target OS.

Communities Connection

When the MySQL Workbench is first launched, unless already in use for other purposes, it will not yet show any connections :

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New Connection Settings

  1. select the '+' icon to the right of MySQL Connections.
  2. in the dialog Setup New Connection, enter values appropriate for your platform
    for demonstration purposes, with the author AEM instance and MySQL on the same server :
    • Connection Name: Communities
    • Connection Method: Standard (TCP/IP)
    • Hostname: 127.0.0.1
    • Username: root
    • Password: no password by default
    • Default Schema: leave blank
  3. select Test Connection to verify the connection to the running MySQL service

Notes :

New Communities Connection

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Database Setup

Open the Communities connection in order to install the database.

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Obtain the SQL Script

The SQL script is obtained from the AEM repository :

  1. browse to CRXDE Lite
  2. select the /libs/social/config/datastore/dsrp/schema folder
  3. download* init-schema.sql
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* One method for downloading the schema is to

  • select the jcr:content node for the sql file
  • notice the value for the jcr:data property is a view link
  • select the view link to save the data to a local file

Create the DSRP Database

Follow the steps below to install the database.  The default name of the database is communities.

If the database name is changed in the script, be sure to also change it in the JDBC config.

Step 1 : open SQL file

In the MySQL Workbench

  • from the File pulldown menu
  • select the downloaded init_schema.sql
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Step 2 : execute SQL Script

In the Workbench window for the file opened in Step 1, select the lightening (flash) icon to execute the script.

In the following image, the init_schema.sql file is ready to be executed :

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Refresh

Once the script is executed, it is necessary to refresh the SCHEMAS section of the Navigator in order to see the new database. Use the refresh icon to the right of 'SCHEMAS' :

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Configure JDBC Connection

The OSGi configuration for Day Commons JDBC Connections Pool configures the MySQL JDBC Driver.

All publish and author AEM instances should point to the same MySQL server.  

When MySQL runs on a server different from AEM, the server hostname must be specified in place of 'localhost' in the JDBC connector.

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  • enter the following values :
    • JDBC driver class : com.mysql.jdbc.Driver
    • JDBC connection URI : jdbc:mysql://localhost:3306/communities?characterEncoding=UTF-8
      specify server in place of localhost if MySQL server is not the same as 'this' AEM server
      communities is the default database (schema) name
    • Username : root
      or enter the configured Username for the MySQL server, if not 'root'
    • Password
      clear this field if no password set for MySQL,
      else enter the configured password for the MySQL Username
    • ...
    • Datasource name : name entered for the MySQL connection, for example, 'communities'
  • select Save

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