Apache Tomcat で MySQL データソースを設定する

This page contains instructions on how to set up a MySQL datasource connection for Confluence Standalone or EAR/WAR.

On this page:

1. Shut down Tomcat

Run bin/shutdown.sh or bin/shutdown.bat to bring Tomcat down while you are making these changes

Make a backup of your <CONFLUENCE_HOME>/confluence.cfg.xml file and your <CONFLUENCE_INSTALL>/conf/server.xml file so you can easily revert should their be a problem.

2. Install the Drivers

Download the MySQL JDBC drivers from http://www.mysql.com/downloads/api-jdbc-stable.html.
After unpacking the file you have downloaded, you'll find a file called something like mysql-connector-java-3.0.10-stable-bin.jar.
Copy this file into the common/lib directory of your Tomcat installation. Be aware that this directory may be just lib for Tomcat version 6 and beyond (i.e. <tomcat-install>/lib rather than <tomcat-install>/common/lib).

3. Tomcat の構成

If you are using the Standalone distribution. edit the conf/server.xml file in your Tomcat installation. Users running their own Tomcat instance must edit the xml file where they declared the Confluence Context descriptor.

If editing conf/server.xml, find the following lines:

<Context path="" docBase="../confluence" debug="0" reloadable="true">
                    <!-- Logger is deprecated in Tomcat 5.5. Logging configuration for Confluence is specified in confluence/WEB-INF/classes/log4j.properties -->

Within the Context tags, directly after the opening <Context.../> line, insert the DataSource Resource tag:
```
<Resource name="jdbc/confluence" auth="Container" type="javax.sql.DataSource"
         username="yourusername"
         password="yourpassword"
         driverClassName="com.mysql.jdbc.Driver"
         url="jdbc:mysql://localhost:3306/confluence?autoReconnect=true&useUnicode=true&characterEncoding=utf8"
         maxActive="15"
         maxIdle="7"
         validationQuery="Select 1" />
```
- Replace the username and password parameters with the correct values for your database
- In the url parameter, replace the word 'confluence' with the name of the database your confluence data will be stored in.
- If you plan to use non-latin characters, you will also need to add "&useUnicode=true&characterEncoding=utf8" on the end of the above URL. These options are not required for any database other than MySQL.

autoReconnect=true is required

The Confluence database connection URL must have autoReconnect=true added to the end to prevent disconnection issues.

Why is the validationQuery element needed?

When a database server reboots, or there is a network failure, all the connections in the connection pool are broken and this normally requires a Application Server reboot.

However, the Commons DBCP (Database Connection Pool) which is used by the Tomcat application server can validate connections before issuing them by running a simple SQL query, and if a broken connection is detected, a new one is created to replace it. To do this, you will need to set the "validationQuery" option on the database connection pool.

If switching from a direct JDBC connection to datasource, you can find the above details in your <CONFLUENCE_HOME>/confluence.cfg.xml file.

The configuration properties for Tomcat's standard data source resource factory (org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory) are as follows:

driverClassName — 使用される JDBC ドライバの完全修飾 Java クラス名。
maxActive — The maximum number of active instances that can be allocated from this pool at the same time.
maxIdle — このプールで同時にアイドル状態可能な接続最大数。
maxWait — The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception.
password — JDBC ドライバに渡されるデータベースのパスワード。
url — JDBC ドライバに渡される接続 URL。(後方互換性のために、プロパティの driverName も認識されます。)
user — JDBC ドライバに渡されるデータベースユーザー名
validationQuery — 接続がアプリケーションに戻される前に接続を検証するためにプールによって使用される SQL クエリ。指定する場合、クエリは少なくとも１つの行を返す SQL SELECT 文でなければなりません。

4.Confluence Web アプリケーションを設定する

Edit confluence/WEB-INF/web.xml in your confluence installation

Go to the end of the file and just before </web-app>, insert the following:

<resource-ref>
        <description>Connection Pool</description>
        <res-ref-name>jdbc/confluence</res-ref-name>
        <res-type>javax.sql.Datasource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

5. Configure Confluence

If you have not yet set up Confluence
1. Follow the steps in the Confluence Setup Guide
2. In the Database Setup section, choose the "Datasource Connection" option.
3. Set the JNDI name to java:comp/env/jdbc/confluence
4. Set the Database dialect to MySQL.

If you are changing an existing Confluence installation over to using a Tomcat datasource
1. Find your ConfluenceHome directory (see: Confluence Home Directory if you don't know where it is).
2. Edit the confluence.cfg.xml file
3. Delete any line that contains a property that begins with hibernate.
4. Insert the following at the start of the <properties> section.
```
<property name="hibernate.setup"><![CDATA[true]]></property>
    <property name="hibernate.dialect"><![CDATA[net.sf.hibernate.dialect.MySQLDialect]]></property>
    <property name="hibernate.connection.datasource"><![CDATA[java:comp/env/jdbc/confluence]]></property>
```

6. Confluence を再起動します。

Run bin/startup.sh or bin/startup.bat to start Tomcat with the new settings.

F.A.Q.

I see "Can't call commit when autocommit=true" during an upgrade of Confluence or otherwise.
Please see http://jira.atlassian.com/browse/CONF-1710. This error can be fixed by adding:
```
&amp;relaxAutoCommit=true
```
to the end of your JDBC URL.
Example:
```
jdbc:mysql://localhost/confdb?autoReconnect=true&amp;relaxAutoCommit=true
```
This JDBC URL can be found in your confluence.cfg.xml file located in your confluence home folder.

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