/*
* JBoss, Home of Professional Open Source
* Copyright 2010 Red Hat Inc. and/or its affiliates and other contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.arquillian.core.spi.context;
import java.util.Map;
import java.util.Stack;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Logger;
import org.jboss.arquillian.core.spi.Validate;
/**
* AbstractContext
*
* @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
* @version $Revision: $
*/
public abstract class AbstractContext<T> implements Context, IdBoundContext<T> {
private static Logger log = Logger.getLogger("Context");
private ConcurrentHashMap<T, ObjectStore> stores;
private ThreadLocal<Stack<StoreHolder<T>>> activeStore = new ThreadLocal<Stack<StoreHolder<T>>>() {
@Override
protected Stack<StoreHolder<T>> initialValue() {
return new Stack<StoreHolder<T>>();
}
};
public AbstractContext() {
stores = new ConcurrentHashMap<T, ObjectStore>();
}
@Override
public T getActiveId() {
if (isActive()) {
return activeStore.get().peek().getId();
}
return null;
}
@Override
public void activate(T id) {
Validate.notNull(id, "ID must be specified");
activeStore.get().push(new StoreHolder<T>(id, createObjectStore(id)));
}
@Override
public void deactivate() {
if (isActive()) {
activeStore.get().pop();
} else {
log.info("Trying to deactivate context, but none active: " + super.getClass().getSimpleName());
}
}
public void deactivateAll() {
if (isActive()) {
activeStore.get().clear();
}
}
@Override
public boolean isActive() {
return !activeStore.get().isEmpty();
}
@Override
public void destroy(T id) {
ObjectStore store = stores.remove(id);
if (store != null) {
store.clear();
}
}
@Override
public ObjectStore getObjectStore() {
if (isActive()) {
return activeStore.get().peek().getStore();
}
throw new RuntimeException("Context is not active: " + super.getClass().getSimpleName());
}
/* (non-Javadoc)
* @see org.jboss.arquillian.core.spi.context.Context#clearAll()
*/
@Override
public void clearAll() {
synchronized (this) {
if (isActive()) {
deactivateAll();
}
activeStore.remove();
for (Map.Entry<T, ObjectStore> entry : stores.entrySet()) {
entry.getValue().clear();
}
stores.clear();
}
}
protected abstract ObjectStore createNewObjectStore();
//-------------------------------------------------------------------------------------||
// Internal Helper Methods ------------------------------------------------------------||
//-------------------------------------------------------------------------------------||
private ObjectStore createObjectStore(T id) {
Validate.notNull(id, "ID must be specified");
ObjectStore store = createNewObjectStore();
ObjectStore previousStore = stores.putIfAbsent(id, store);
if (previousStore != null) {
return previousStore;
}
return store;
}
private class StoreHolder<X> {
private X id;
private ObjectStore store;
public StoreHolder(X id, ObjectStore store) {
this.id = id;
this.store = store;
}
/**
* @return the id
*/
public X getId() {
return id;
}
/**
* @return the store
*/
public ObjectStore getStore() {
return store;
}
}
}