core/include/ignite/cache/query/continuous/continuous_query_handle.h

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/*
 * Copyright 2019 GridGain Systems, Inc. and Contributors.
 *
 * Licensed under the GridGain Community Edition License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.gridgain.com/products/software/community-edition/gridgain-community-edition-license
 *
 * 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 _IGNITE_CACHE_QUERY_CONTINUOUS_CONTINUOUS_QUERY_HANDLE
#define _IGNITE_CACHE_QUERY_CONTINUOUS_CONTINUOUS_QUERY_HANDLE
 
#include <ignite/impl/cache/query/continuous/continuous_query_handle_impl.h>
 
namespace ignite
{
    namespace cache
    {
        namespace query
        {
            namespace continuous
            {
                template<typename K, typename V>
                class ContinuousQueryHandle
                {
                public:
                    ContinuousQueryHandle() :
                        impl()
                    {
                        // No-op.
                    }
 
                    ContinuousQueryHandle(impl::cache::query::continuous::ContinuousQueryHandleImpl* impl) :
                        impl(impl)
                    {
                        // No-op.
                    }
 
                    QueryCursor<K, V> GetInitialQueryCursor()
                    {
                        IgniteError err;
 
                        QueryCursor<K, V> res = GetInitialQueryCursor(err);
 
                        IgniteError::ThrowIfNeeded(err);
 
                        return res;
                    }
 
                    QueryCursor<K, V> GetInitialQueryCursor(IgniteError& err)
                    {
                        impl::cache::query::continuous::ContinuousQueryHandleImpl* impl0 = impl.Get();
 
                        if (impl0)
                            return QueryCursor<K, V>(impl0->GetInitialQueryCursor(err));
                        else
                        {
                            err = IgniteError(IgniteError::IGNITE_ERR_GENERIC,
                                "Instance is not usable (did you check for error?).");
 
                            return QueryCursor<K, V>();
                        }
                    }
 
                    bool IsValid() const
                    {
                        return impl.IsValid();
                    }
 
                private:
                    typedef impl::cache::query::continuous::ContinuousQueryHandleImpl ContinuousQueryHandleImpl;
 
                    common::concurrent::SharedPointer<ContinuousQueryHandleImpl> impl;
                };
            }
        }
    }
}
 
#endif //_IGNITE_CACHE_QUERY_CONTINUOUS_CONTINUOUS_QUERY_HANDLE