Problem in removing a node from the cache...

[srivathsak]

I am having a problem in removing a node from the existing cache.Actualy while making use of the cache Framework I did not understand the Functionality of Region and RegionManager in total. And the code marked in Red is posing a problem.Please do resolve this to me as fast as possible.
And if possible send me a document that explains the functionality of Region and regionManager very clearly.

public void nodeRemoved(){
Fqn fqn;
for (int i = 0; i < 10; i++) {
String _str = rootStr + i + "/" + i;
fqn = Fqn.fromString(_str);
try {
cache1_.put(fqn, _str, _str);
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
int period = (wakeupIntervalMillis_ / 50);
_sleep(period); // it really depends the eviction thread time.
String _str1 = rootStr + "3/3";
Fqn _fqn1 = Fqn.fromString(_str1);
String _str2 = rootStr + "7/7";
Fqn _fqn2 = Fqn.fromString(_str2);
try {
cache1_.get(_fqn1, _str1); // just to keep it fresh
cache1_.get(_fqn2, _str2); // just to keep it fresh
_sleep(period); // it really depends the eviction thread time.
cache1_.get(_fqn1, _str1); // just to keep it fresh
cache1_.get(_fqn2, _str2); // just to keep it fresh
_sleep(period); // it really depends the eviction thread time.
cache1_.get(_fqn1, _str1); // just to keep it fresh
cache1_.get(_fqn2, _str2); // just to keep it fresh
String val = (String) cache1_.get(rootStr + "7/7", rootStr + "7/7");
System.out.println("val is :"+val);
System.out.println("cache before removing is:\n" + cache1_.toString(true));
System.out.println("Before instantiating the RegionManager");
DummyEvictionPolicy _policy = new DummyEvictionPolicy();
RegionManager _regionManager = new RegionManager(_policy);
algo_ = new LRUAlgorithm();
_regionManager.createRegion(_fqn1.toString(),algo_);
_regionManager.createRegion(_fqn2.toString(),algo_);
Region region = _regionManager.getRegion("a/b/c");
System.out.println("step1");
fqn = Fqn.fromString("a/b/c/7/7");
System.out.println("step1.1");
region.setAddedNode(fqn);
EvictedEventNode eventNode = (EvictedEventNode)region.takeLastEventNode();
System.out.println("cache after removing is:\n" + cache1_.toString(true));
} catch (Exception e) {
System.out.println(e.getMessage());
}
}

Thanks and Regards ,
Srivathsa