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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.openejb.client;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;

/**
 * This factory supports the following URI format
 * 

* failover:[strategy:]urlList *

* Where strategy and urlList are variables *

* strategy = the ConnectionStrategy name, such as "sticky", "round-robin", * or "random". This parameter is optional. *

* urlList = a comma separated list connection URIs. There must be a * ConnectionFactory installed for the associated URI. *

* Some examples might be: *

* - failover:ejbd://foo:4201,ejbd://bar:4201 * - failover:random:ejbd://foo:4201,ejbd://bar:4201 * - failover:round-robin:ejbd://foo:4201,ejbds://bar:4201,multicast://239.255.2.3:6142 *

* The final URI being the most clever in that it will sequentially go * through the list, first attempting a couple hard-coded addresses before * finally resorting to multicast in an attempt to discover a server. * * @version $Rev$ $Date$ */ public class FailoverConnectionFactory implements ConnectionFactory { @Override public Connection getConnection(final URI failoverUri) throws IOException { // URI can be in the following formats: // // failover:ejbd://foo:4201,ejbd://bar:4202 // failover:sticky:ejbd://foo:4201,ejbd://bar:4202 // trim off the "failover:" final String remainder = failoverUri.getRawSchemeSpecificPart(); final URI uri = URI.create(remainder); String strategy = uri.getScheme(); String servers = uri.getRawSchemeSpecificPart(); if (servers.startsWith("//")) { strategy = "default"; servers = remainder; } final List list = new ArrayList(); for (final String server : servers.split(",")) { list.add(URI.create(server)); } final URI[] uris = list.toArray(new URI[list.size()]); final ClusterMetaData data = new ClusterMetaData(0, uris); data.setConnectionStrategy(strategy); return ConnectionManager.getConnection(data, new ServerMetaData(), null); } public static void main(final String[] args) throws IOException { final FailoverConnectionFactory factory = new FailoverConnectionFactory(); final URI uri = URI.create("failover:ejbd://foo:4201,ejbd://bar:4202"); final Connection connection = factory.getConnection(uri); } }





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