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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.Collections;
import java.util.Set;
/**
* A shard mapping representing this set of sharded data.
*/
public abstract class ShardMapping {
private int mappingId;
private ShardingType shardingType;
private String globalGroupName;
protected Set<ShardTable> shardTables;
protected Set<ShardIndex> shardIndices;
public ShardMapping(int mappingId, ShardingType shardingType, String globalGroupName, Set<ShardTable> shardTables, Set<ShardIndex> shardIndices) {
this.mappingId = mappingId;
this.shardingType = shardingType;
this.globalGroupName = globalGroupName;
this.shardTables = shardTables;
this.shardIndices = shardIndices;
}
/**
* Lookup the server group that stores the given key.
*/
public String getGroupNameForKey(String key) {
return getShardIndexForKey(key).getGroupName();
}
/**
* Decide which shard index stores the given key.
*/
protected abstract ShardIndex getShardIndexForKey(String key);
/**
* The ID of this mapping.
*/
public int getMappingId() {
return this.mappingId;
}
/**
* The {@link ShardingType} of this mapping.
*/
public ShardingType getShardingType() {
return this.shardingType;
}
/**
* The name of the global group for this shard map.
*/
public String getGlobalGroupName() {
return this.globalGroupName;
}
/**
* Return the set of tables sharded in this mapping.
*/
public Set<ShardTable> getShardTables() {
return Collections.unmodifiableSet(this.shardTables);
}
/**
* Return the set of shards in this mapping.
*/
public Set<ShardIndex> getShardIndices() {
return Collections.unmodifiableSet(this.shardIndices);
}
}