/**
* Get heavy object.
*/
public Heavy GetHeavy()
{
if (_heavy == null)
{
_heavy = new Heavy();
}
return(_heavy);
}
/**
* Get heavy object.
*/
public Heavy GetHeavy()
{
if (_heavy == null)
{
lock (SyncObject)
{
if (_heavy == null)
{
_heavy = new Heavy();
}
}
return(_heavy);
}
return(_heavy);
}
static void Main(string[] args)
{
// Simple lazy loader - not thread safe
HolderNaive holderNaive = new HolderNaive();
Heavy heavy = holderNaive.GetHeavy();
Console.WriteLine("heavy={0}", heavy);
// Thread safe lazy loader, but with heavy synchronization on each access
HolderThreadSafe holderThreadSafe = new HolderThreadSafe();
Heavy another = holderThreadSafe.GetHeavy();
Console.WriteLine("another={0}", another);
// The most efficient lazy loader utilizing Java 8 features
HolderLazy java8Holder = new HolderLazy();
Heavy next = java8Holder.GetHeavy();
Console.WriteLine("next={0}", next);
Console.WriteLine("Hello World!");
}