Continuous or On-Demand: How Should Your Minecraft Bukkit Plugin Handle Database Connections?

Database Connection Handling: Continuous vs. On-Demand

A typical scenario involves a Minecraft Bukkit plugin requiring a database connection. The question arises: should this connection remain open throughout the plugin's execution or be established and terminated only when necessary?

On-Demand Connection Establishment

Opening database connections repeatedly can be computationally expensive. Instead, it is advisable to create a connection only when it is needed for database operations.

Java provides two approaches for this:

• Pre-Java 7: Manually opening and closing the connection within a try-finally block.
• Java 7 and later: Utilizing a try-with-resources statement, where the connection is automatically closed after use.

<code class="java">try (Connection con = ...) {
  // Perform database operations
}</code>

Connection Pooling

However, manually managing database connections is still prone to inefficiencies. It is recommended to employ a database connection pool, represented by Java's DataSource interface, which handles physical database connections dynamically.

When a connection is "closed" using Connection#close, it is simply placed in a "sleep" mode and remains open.

Related Resources

• Java Connection Pooling: https://docs.oracle.com/javase/7/docs/api/javax/sql/DataSource.html

• Tools for Connection Pooling:

  • BoneCP: https://github.com/atomikos/bonecp
  • c3po: https://github.com/atomikos/c3p0
  • Apache Commons DBCP: https://commons.apache.org/proper/commons-dbcp/
  • HikariCP: https://github.com/brettwooldridge/HikariCP

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