/**
* Adds to both: the memory and the disk
*/
public synchronized void add(String key, Serializable n) {
synchronized(cache){
super.add(key, n);
File fileForKey = getFileForKey(key);
if(DEBUG){
System.out.println("Disk cache - Adding: "+key+" file: "+fileForKey);
}
REF.writeToFile(n, fileForKey);
keys.add(key);
}
}
public synchronized Serializable getObj(String key) {
synchronized(cache){
Serializable v = super.getObj(key);
if(v == null && keys.contains(key)){
//miss in memory... get from disk
File file = getFileForKey(key);
if(file.exists()){
v = (Serializable) REF.readFromFile(file);
}else{
if(DEBUG){
System.out.println("File: "+file+" is in the cache but does not exist (so, it will be removed).");
}
}
if(v == null){
this.remove(key);
return null;
}
//put it back in memory
super.add(key, v);
}
return v;
}
}