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| | | ! |
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| | | ! CCPL HEADER END |
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| | | ! |
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| | | ! Copyright 2011-2012 ForgeRock AS |
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| | | ! Copyright 2011-2013 ForgeRock AS |
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| | | ! |
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| | | --> |
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| | | <chapter xml:id='chap-simple-proxy' |
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| | |
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| | | of connection factories, such as those that you set up for connection |
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| | | pooling.</para> |
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| | | |
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| | | <para>The following excerpt shows how to set up round robin load balancing |
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| | | across directory servers.</para> |
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| | | |
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| | | <programlisting language="java" |
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| | | >final RoundRobinLoadBalancingAlgorithm algorithm = |
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| | | >final List<ConnectionFactory> factories = new LinkedList<ConnectionFactory>(); |
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| | | // Set up a ConnectionFactory for each directory server in the pool as shown in |
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| | | // the previous example, and then set up a load balancer. |
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| | | final RoundRobinLoadBalancingAlgorithm algorithm = |
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| | | new RoundRobinLoadBalancingAlgorithm(factories); |
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| | | final ConnectionFactory factory = Connections.newLoadBalancer(algorithm);</programlisting> |
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| | | <para>With multiple pools of directory servers, for example in a deployment |
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| | | across multiple data centers, also use fail over load balancing. Fail over |
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| | | load balancing directs all requests to the first (preferred) pool of servers |
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| | | until problems are encountered with the connections to that pool. Then it |
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| | | fails over to the next pool in the list. Therefore in each data center you |
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| | | can set up round robin load balancing, and then set up fail over load |
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| | | balancing across data centers.</para> |
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| | | |
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| | | <programlisting language="java" |
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| | | >// localFactory: ConnectionFactory to servers in the local data center |
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| | | // remoteFactory: ConnectionFactory for servers in a remote data center |
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| | | // localFactory and remoteFactory use round robin load balancing "internally". |
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| | | |
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| | | final List<ConnectionFactory> factories = |
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| | | Arrays.asList(localFactory, remoteFactory); |
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| | | final FailoverLoadBalancingAlgorithm algorithm = |
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| | | new FailoverLoadBalancingAlgorithm(factories); |
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| | | final ConnectionFactory factory = Connections.newLoadBalancer(algorithm);</programlisting> |
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| | | <para>The algorithms also include constructors that let you adjust timeouts |
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| | | and so forth.</para> |
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| | | </section> |
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