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x-pg-client.4.3.7.source-code.pool_config.adoc Maven / Gradle / Ivy

=== Server load balancing

You can configure the pool with a list of servers instead of a single server.

[source,$lang]
----
{@link examples.SqlClientExamples#poolConfig01}
----

The pool uses a round-robin load balancing when a connection is created to select different servers.

NOTE: this provides load balancing when the connection is created and not when the connection is borrowed from the pool.

=== Pool connection initialization

You can use the {@link io.vertx.sqlclient.Pool#connectHandler} to interact with a connection after it
has been created and before it is inserted in the pool.

[source,$lang]
----
{@link examples.SqlClientExamples#poolConfig02}
----

Once you are done with the connection, you should simply close it to signal the pool to use it.