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SubjectBase.h
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SubjectBase.h
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//
// Licensed to Green Energy Corp (www.greenenergycorp.com) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. Green Enery Corp licenses this file
// to you 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.
//
#ifndef __SUBJECT_BASE_H_
#define __SUBJECT_BASE_H_
#include "ISubject.h"
#include "INotifier.h"
#include "LockBase.h"
#include <set>
namespace apl
{
template <class LockType>
class SubjectBase : public ISubject
{
typedef std::set<INotifier*> NotifierSet;
public:
virtual ~SubjectBase() {}
// implement the ISubject interface
void AddObserver(INotifier* apNotifier) {
CriticalSection cs(&mSubjectLock);
mNotifiers.insert(apNotifier);
}
void RemoveObserver(INotifier* apNotifier) {
CriticalSection cs(&mSubjectLock);
mNotifiers.erase(apNotifier);
}
protected:
void NotifyAll() {
CriticalSection cs(&mSubjectLock);
for(NotifierSet::iterator i = mNotifiers.begin(); i != mNotifiers.end(); ++i) {
(*i)->Notify();
}
}
private:
LockType mSubjectLock;
NotifierSet mNotifiers;
};
}
#endif