A concurrent object pool that supports pooling multiple resources that are associated with a single key. This is a proof-of-concept implementation for @jbellis with regards to CASSANDRA-5661.
A pool might manage the connections for databases, such as a master and multiple slaves.
LoadingMultiwayPool<String, Connection> pool = MultiwayPoolBuilder.newBuilder()
.maximumSize(50)
.expireAfterAccess(10, TimeUnit.MINUTES)
.lifecycle(new ResourceLifecycle<String, Connection>() {
public void onRemoval(String key, Connection connection) {
connection.close();
}
})
.build(new ResourceLoader<String, Connection>() {
public Connection load(String databaseName) {
// create connection to database
}
});
Connection connection = pool.borrow("master");
try {
// use connection...
} finally {
pool.release(connection);
}Optimized using JProfiler, a full-featured Java profiler licensed freely to open source projects.