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# Connection Pooling
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ActiveMQ provides enterprise-grade connection pooling implementations for high-performance applications requiring efficient resource management.
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## Capabilities
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### Modern Pooling Implementation
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```java { .api }
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public class PooledConnectionFactory implements ConnectionFactory, JNDIStorableInterface, Service {
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    public void setConnectionFactory(ConnectionFactory connectionFactory);
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    public void setMaxConnections(int maxConnections);
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    public void setMaximumActiveSessionPerConnection(int maximumActiveSessionPerConnection);
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    public Connection createConnection() throws JMSException;
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    public void start() throws Exception;
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    public void stop() throws Exception;
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}
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```
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### XA Transaction Support
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```java { .api }
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public class JcaPooledConnectionFactory extends PooledConnectionFactory {
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    public void setTransactionManager(TransactionManager transactionManager);
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    public XAConnection createXAConnection() throws JMSException;
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}
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```
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### Legacy Pooling
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```java { .api }
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public class org.apache.activemq.pool.PooledConnectionFactory extends org.apache.activemq.jms.pool.PooledConnectionFactory {
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    public void setMaxConnections(int maxConnections);
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    public void setConnectionFactory(ConnectionFactory connectionFactory);
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}
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```