Java Mapstore未从数据库Hazelcast加载数据
我正在使用Hazelcast和mysql。Java Mapstore未从数据库Hazelcast加载数据,java,mysql,hazelcast,Java,Mysql,Hazelcast,我正在使用Hazelcast和mysql。 我在mysql中为我的表创建了一个mapstore。我试图做的是使用数据库中的map.loadAll填充数据。我的地图商店实现如下 public class CityMapStore implements MapStore<Long, City> { private final Connection con; public CityMapStore() { try { con = Drive
我在mysql中为我的表创建了一个mapstore。我试图做的是使用数据库中的map.loadAll填充数据。我的地图商店实现如下
public class CityMapStore
implements MapStore<Long, City>
{
private final Connection con;
public CityMapStore() {
try {
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/hazel", "root", "root123");
con.createStatement().executeUpdate(
"create table if not exists City (id bigint, name varchar(45), primary key (id))");
} catch (SQLExpublic synchronized void delete(Long key) {
System.out.println("Delete:" + key);
try {
con.createStatement().executeUpdate(
String.format("delete from City where id = %s", key));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}ception e) {
throw new RuntimeException(e);
}
}
public synchronized void delete( Long key )
{
System.out.println( "Delete:" + key );
try
{
con.createStatement().executeUpdate( String.format( "delete from City where id = %s", key ) );
}
catch ( SQLException e )
{
throw new RuntimeException( e );
}
}
public synchronized void deleteAll( Collection<Long> keys )
{
for ( Long key : keys )
delete( key );
}
public synchronized void storeAll( Map<Long, City> map )
{
for ( Map.Entry<Long, City> entry : map.entrySet() )
store( entry.getKey(), entry.getValue() );
}
public synchronized Map<Long, City> loadAll( Collection<Long> keys )
{
Map<Long, City> result = new HashMap<Long, City>();
for ( Long key : keys )
result.put( key, load( key ) );
return result;
}
public Set<Long> loadAllKeys()
{
return null;
}
}
公共类城市邮箱
实现MapStore
{
私人最终连接con;
公共城市购物中心(){
试一试{
con=DriverManager.getConnection(“jdbc:mysql://localhost:3306/hazel“、”根“、”根123”);
con.createStatement().executeUpdate(
“如果不存在,则创建表City(id bigint,name varchar(45),primary key(id))”;
}捕获(SQLExpublic同步无效删除(长键){
System.out.println(“删除:+键);
试一试{
con.createStatement().executeUpdate(
格式(“从id=%s的城市删除”,键));
}捕获(SQLE异常){
抛出新的运行时异常(e);
}
}(e){
抛出新的运行时异常(e);
}
}
公共同步作废删除(长密钥)
{
System.out.println(“删除:+键);
尝试
{
con.createStatement().executeUpdate(String.format(“从id=%s的城市删除”,键));
}
捕获(SQLE异常)
{
抛出新的运行时异常(e);
}
}
公共同步的void deleteAll(集合密钥)
{
用于(长键:键)
删除(键);
}
公共同步的void storeAll(映射)
{
for(Map.Entry:Map.entrySet())
存储(entry.getKey(),entry.getValue());
}
公共同步映射loadAll(集合键)
{
映射结果=新的HashMap();
用于(长键:键)
结果.输入(键,加载(键));
返回结果;
}
公共集合loadAllKeys()
{
返回null;
}
}
我的负荷等级是这个
public class LoadAllCity
{
public static void main( String[] args )
{
final Long numberOfEntriesToAdd = 1000l;
final String mapName = LoadAllCity.class.getCanonicalName();
final Config config = createNewConfig( mapName );
final HazelcastInstance node = Hazelcast.newHazelcastInstance( config );
final IMap<Long, City> map = node.getMap( mapName );
populateMap( map, numberOfEntriesToAdd );
System.out.printf( "# After populating map size\t: %d\n", map.size() );
System.out.printf( "# Map store has %d elements\n", numberOfEntriesToAdd );
map.evictAll();
System.out.printf( "# After evictAll map size\t: %d\n", map.size() );
map.loadAll( true );
System.out.printf( "# After loadAll map size\t: %d\n", map.size() );
}
private static void populateMap( IMap<Long, City> map, Long itemCount )
{
for ( long i = 0; i < itemCount; i++ )
{
City city = new City( "Viren" + i );
// map.put(i, city);
}
}
private static Config createNewConfig( String mapName )
{
final CityMapStore cityStore = new CityMapStore();
XmlConfigBuilder configBuilder = new XmlConfigBuilder();
Config config = configBuilder.build();
MapConfig mapConfig = config.getMapConfig( mapName );
MapStoreConfig mapStoreConfig = new MapStoreConfig();
mapStoreConfig.setClassName( CityMapStore.class.getCanonicalName() );
mapStoreConfig.setImplementation( cityStore );
mapStoreConfig.setWriteDelaySeconds( 0 );
mapConfig.setMapStoreConfig( mapStoreConfig );
return config;
}
}
公共类LoadAllCity
{
公共静态void main(字符串[]args)
{
最终长数量离心添加=1000l;
最后一个字符串mapName=LoadAllCity.class.getCanonicalName();
最终配置=createNewConfig(映射名);
最终HazelcastInstance节点=Hazelcast.newHazelcastInstance(配置);
最终IMap映射=node.getMap(mapName);
populateMap(地图、numberOfEntriesToAdd);
System.out.printf(“#在填充映射大小\t:%d\n之后,map.size());
System.out.printf(“#映射存储有%d个元素\n”,numberOfEntriesToAdd);
map.executeAll();
System.out.printf(“#在所有映射大小之后\t:%d\n”,map.size());
map.loadAll(真);
System.out.printf(“#加载后所有映射大小\t:%d\n”,map.size());
}
私有静态void populateMap(IMap映射,长项计数)
{
对于(长i=0;i
要在启动时加载数据,请先覆盖loadAllKeys方法,或者如果您不想使用该方法,请使用选定的键以oveloaded loadAll方法加载数据我的地图存储实现这是
?当我运行LoadAllCity时,它将填充表中的数据,但loadAll将地图大小设为零。