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| <h1>JDBC Support</h1> |
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| <p><a href="features">Features</a> > <a href="persistence">Persistence</a> > <a href="jdbc-support">JDBC Support</a></p> |
| |
| <p>We support a range of SQL databases for message persistence such as</p> |
| |
| <ul> |
| <li>Apache Derby</li> |
| <li>Axion</li> |
| <li>DB2</li> |
| <li>HSQL</li> |
| <li>Informix</li> |
| <li>MaxDB</li> |
| <li>MySQL</li> |
| <li>Oracle</li> |
| <li>Postgresql</li> |
| <li><a href="Persistence/JDBC Support/sqlserver">SQLServer</a></li> |
| <li><a href="Persistence/JDBC Support/sybase">Sybase</a></li> |
| </ul> |
| |
| <p>as well as a number of generic JDBC providers.</p> |
| |
| <h3 id="auto-discovery-of-your-jdbc-provider">Auto-discovery of your JDBC provider</h3> |
| |
| <p>We try to auto-detect from the JDBC driver which JDBCAdapter to use via these <a href="https://git-wip-us.apache.org/repos/asf?p=activemq.git;a=tree;f=activemq-jdbc-store/src/main/resources/META-INF/services/org/apache/activemq/store/jdbc">config files</a> and the return string from the JDBC driver.</p> |
| |
| <p>If you have a JDBC database which we don’t support then please let us know what JDBC driver string you’re getting and <a href="discussion-forums">drop us a note</a> or raise an issue in our <a href="http://issues.apache.org/activemq/browse/AMQ">support database</a> and we’ll fix it pretty quickly.</p> |
| |
| <p>If your database is not in the above list it is normally a matter of tweaking the StatementProvider to ensure that the JDBCMessageStore uses the right flavour of SQL. So normally most databases support one of these providers…</p> |
| |
| <ul> |
| <li>org.activemq.store.jdbc.adapter.BlobJDBCAdapter</li> |
| <li>org.activemq.store.jdbc.adapter.BytesJDBCAdapter</li> |
| <li>org.activemq.store.jdbc.adapter.DefaultJDBCAdapter</li> |
| <li>org.activemq.store.jdbc.adapter.ImageJDBCAdapter</li> |
| </ul> |
| |
| <p>You can explicitly specify the JDBC adaptor using its xbean identifier, inside the activemq.xml…</p> |
| <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code><jdbcPersistenceAdapter adapter="postgresql-jdbc-adapter"/> |
| </code></pre></div></div> |
| |
| <h3 id="customizing-the-sql-ddl">Customizing the SQL DDL</h3> |
| |
| <p>You can confiugure the various SQL datatypes - such as column sizes and so forth - using the statements element</p> |
| <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code><broker useJmx="false"> |
| |
| <persistenceAdapter> |
| <journaledJDBC useJournal="false"> |
| <statements> |
| <statements stringIdDataType ="VARCHAR(128)"/> |
| </statements> |
| </journaledJDBC> |
| </persistenceAdapter> |
| |
| </broker> |
| </code></pre></div></div> |
| <p>For more info on what attributes can be set on the statements element, see the <a href="http://activemq.apache.org/maven/apidocs/org/apache/activemq/store/jdbc/Statements.html">Statements class</a>. All the settable bean properties can be used as attributes of the <statements> element.</statements></p> |
| |
| <h3 id="using-mysql">Using MySQL</h3> |
| |
| <p>If you are using MySQL then you should set the <strong>relaxAutoCommit</strong> flag to be true. e.g.</p> |
| <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code><bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> |
| <property name="driverClassName" value="com.mysql.jdbc.Driver"/> |
| <property name="url" value="jdbc:mysql://localhost/activemq?relaxAutoCommit=true"/> |
| <property name="username" value="activemq"/> |
| <property name="password" value="activemq"/> |
| <property name="poolPreparedStatements" value="true"/> |
| </bean> |
| </code></pre></div></div> |
| <p>To see this in action see the <a href="http://svn.apache.org/repos/asf/activemq/trunk/assembly/src/release/conf/activemq.xml">default configuration file</a></p> |
| |
| <h3 id="for-amq-3x">For AMQ 3.x</h3> |
| |
| <p>In 3.x you can specify the adapter as follows</p> |
| <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code><jdbcPersistence adapterClass="org.activemq.store.jdbc.adapter.ImageBasedJDBCAdaptor"> |
| ... |
| </jdbcPersistence> |
| </code></pre></div></div> |
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