entity beans - using 'sychronized'

[timasmith]

Hi,

My entity BMP bean has a cache of data, lets call it encapsulated by my
object 'cache'.

Every now and then I reload the cache - and want to prevent access
during that time (several seconds).

However the rest of time every one can have at it. Here is what I have
come up with - but I think synchronizing every single read is a little
over the top. Is there a cheaper 'read only' synchronization option?
Or a better way to do this without handing the data over to the
container.

public class MyEntity {

private Cache cache = new Cache();

public loadCache() {
synchronized (this) {
cache = getNewCache();
}
}

public String readFromCache() {
synchronized (this) {
return cache.getStringFromCache();
}
}
}

thanks

Tim

 

[Alan Krueger]

My entity BMP bean has a cache of data, lets call it encapsulated by my
object 'cache'.

Every now and then I reload the cache - and want to prevent access
during that time (several seconds).

However the rest of time every one can have at it. Here is what I have
come up with - but I think synchronizing every single read is a little
over the top. Is there a cheaper 'read only' synchronization option?
Or a better way to do this without handing the data over to the
container.

http://www.jguru.com/faq/view.jsp?EID=35269