examples/dotnet/ContinuousQueryCs/MyCqListener.cs

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.
*/

using System;

using Apache.Geode.Client;

namespace Apache.Geode.Examples.ContinuousQuery
{
    public class MyCqListener<TKey, TResult> : ICqListener<TKey, TResult>
    {
        public virtual void OnEvent(CqEvent<TKey, TResult> ev)
        {
            Order val = ev.getNewValue() as Order;
            TKey key = ev.getKey();
            string operationType = "UNKNOWN";

            switch (ev.getQueryOperation())
            {
                case CqOperation.OP_TYPE_CREATE:
                    operationType = "CREATE";
                    break;
                case CqOperation.OP_TYPE_UPDATE:
                    operationType = "UPDATE";
                    break;
                case CqOperation.OP_TYPE_DESTROY:
                    operationType = "DESTROY";
                    break;
                default:
                    Console.WriteLine("Unexpected operation encountered {0}", ev.getQueryOperation());
                    break;
            }

            if (val != null)
            {
                Console.WriteLine("MyCqListener::OnEvent({0}) called with key {1}, value {2}", operationType, key, val.ToString());
            }
            else
            {
                Console.WriteLine("MyCqListener::OnEvent({0}) called with key {1}, value null", operationType, key);
            }
        }

        public virtual void OnError(CqEvent<TKey, TResult> ev)
        {
            Console.WriteLine("MyCqListener::OnError called");
        }

        public virtual void Close()
        {
            Console.WriteLine("MyCqListener::close called");
        }
    }
}