FabricConnection.java
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/*
Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this
program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.fabric;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import com.mysql.fabric.proto.xmlrpc.XmlRpcClient;
public class FabricConnection {
private XmlRpcClient client;
// internal caches
private Map<String, ShardMapping> shardMappingsByTableName = new HashMap<String, ShardMapping>();
private Map<String, ServerGroup> serverGroupsByName = new HashMap<String, ServerGroup>();
private long shardMappingsExpiration;
private long serverGroupsExpiration;
public FabricConnection(String url, String username, String password) throws FabricCommunicationException {
this.client = new XmlRpcClient(url, username, password);
refreshState();
}
/**
* @param urls
* @param username
* @param password
* @throws FabricCommunicationException
*/
public FabricConnection(Set<String> urls, String username, String password) throws FabricCommunicationException {
throw new UnsupportedOperationException("Multiple connections not supported.");
}
public String getInstanceUuid() {
return null;
}
public int getVersion() {
return 0;
}
/**
* @return version of state data
*/
public int refreshState() throws FabricCommunicationException {
FabricStateResponse<Set<ServerGroup>> serverGroups = this.client.getServerGroups();
FabricStateResponse<Set<ShardMapping>> shardMappings = this.client.getShardMappings();
this.serverGroupsExpiration = serverGroups.getExpireTimeMillis();
this.shardMappingsExpiration = shardMappings.getExpireTimeMillis();
for (ServerGroup g : serverGroups.getData()) {
this.serverGroupsByName.put(g.getName(), g);
}
for (ShardMapping m : shardMappings.getData()) {
// a shard mapping may be associated with more than one table
for (ShardTable t : m.getShardTables()) {
this.shardMappingsByTableName.put(t.getDatabase() + "." + t.getTable(), m);
}
}
return 0;
}
public ServerGroup getServerGroup(String serverGroupName) throws FabricCommunicationException {
if (isStateExpired()) {
refreshState();
}
return this.serverGroupsByName.get(serverGroupName);
}
public ShardMapping getShardMapping(String database, String table) throws FabricCommunicationException {
if (isStateExpired()) {
refreshState();
}
return this.shardMappingsByTableName.get(database + "." + table);
}
public boolean isStateExpired() {
return System.currentTimeMillis() > this.shardMappingsExpiration || System.currentTimeMillis() > this.serverGroupsExpiration;
}
public Set<String> getFabricHosts() {
return null;
}
public XmlRpcClient getClient() {
return this.client;
}
}