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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2021 Bell Canada. 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.context.impl.distribution;
import java.util.Timer;
import java.util.TimerTask;
import lombok.ToString;
import org.onap.policy.apex.context.ContextException;
import org.onap.policy.apex.context.Distributor;
import org.onap.policy.apex.context.parameters.ContextParameterConstants;
import org.onap.policy.apex.context.parameters.PersistorParameters;
import org.onap.policy.common.parameters.ParameterService;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This class is used to periodically flush a context distributor.
*
* @author eeilfn
*/
@ToString
public class DistributorFlushTimerTask extends TimerTask {
private static final XLogger LOGGER = XLoggerFactory.getXLogger(DistributorFlushTimerTask.class);
// The timer for flushing
@ToString.Exclude
private Timer timer = null;
// The context distributor to flush
@ToString.Exclude
private final Distributor contextDistributor;
// Timing information
private long flushPeriod = 0;
private long flushCount = 0;
/**
* Constructor, save a reference to the event stream handler.
*
* @param contextDistributor the distributor that this timer task is flushing
* @throws ContextException On flush setup errors
*/
public DistributorFlushTimerTask(final Distributor contextDistributor) throws ContextException {
// Save the context distributor and period
this.contextDistributor = contextDistributor;
// Set the period for persistence flushing
final var persistorParameters =
(PersistorParameters) ParameterService.get(ContextParameterConstants.PERSISTENCE_GROUP_NAME);
flushPeriod = persistorParameters.getFlushPeriod();
// Set up the timer
timer = new Timer(DistributorFlushTimerTask.class.getSimpleName(), true);
timer.schedule(this, flushPeriod, flushPeriod);
LOGGER.debug("context distributor {} flushing set up with interval: {} ms", contextDistributor.getKey().getId(),
flushPeriod);
}
/**
* Flush the context distributor.
*/
@Override
public void run() {
// Increment the flush counter
flushCount++;
LOGGER.debug("context distributor {} flushing: period={}: count={}", contextDistributor.getKey().getId(),
flushPeriod, flushCount);
try {
contextDistributor.flush();
LOGGER.debug("context distributor {} flushed: period={}: count={}", contextDistributor.getKey().getId(),
flushPeriod, flushCount);
} catch (final ContextException e) {
LOGGER.error("flush error on context distributor {}: period={}: count={}",
contextDistributor.getKey().getId(), flushPeriod, flushCount, e);
}
}
/**
* Cancel the timer.
*
* @return true, if cancel
*/
@Override
public boolean cancel() {
// Cancel the timer
if (timer != null) {
timer.cancel();
}
return true;
}
}
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