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/*-
 * ============LICENSE_START=======================================================
 * org.onap.integration
 * ================================================================================
 * Copyright (C) 2018 NOKIA Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.pnfsimulator.netconfmonitor;

import com.tailf.jnc.JNCException;
import org.onap.pnfsimulator.netconfmonitor.netconf.NetconfConfigurationCache;
import org.onap.pnfsimulator.netconfmonitor.netconf.NetconfConfigurationReader;
import org.onap.pnfsimulator.netconfmonitor.netconf.NetconfConfigurationWriter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.util.Timer;

@Service
public class NetconfMonitorService {
    private static final long timePeriod = 1000L;
    private static final long startDelay = 0;

    private Timer timer;
    private NetconfConfigurationReader reader;
    private NetconfConfigurationWriter writer;
    private NetconfConfigurationCache cache;

    @Autowired
    public NetconfMonitorService(Timer timer,
        NetconfConfigurationReader reader,
        NetconfConfigurationWriter writer,
        NetconfConfigurationCache cache) {
        this.timer = timer;
        this.reader = reader;
        this.writer = writer;
        this.cache = cache;
    }

    @PostConstruct
    public void start() throws IOException, JNCException {
        setStartConfiguration();
        NetconfConfigurationCheckingTask task =  new NetconfConfigurationCheckingTask(reader, writer, cache);
        timer.scheduleAtFixedRate(task, startDelay, timePeriod);
    }

    private void setStartConfiguration() throws IOException, JNCException {
        String configuration = reader.read();
        writer.writeToFile(configuration);
        cache.update(configuration);
    }
}