2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.context.impl.distribution;
23 import java.util.Timer;
24 import java.util.TimerTask;
26 import org.onap.policy.apex.context.ContextException;
27 import org.onap.policy.apex.context.Distributor;
28 import org.onap.policy.apex.context.parameters.ContextParameterConstants;
29 import org.onap.policy.apex.context.parameters.PersistorParameters;
30 import org.onap.policy.common.parameters.ParameterService;
31 import org.slf4j.ext.XLogger;
32 import org.slf4j.ext.XLoggerFactory;
35 * This class is used to periodically flush a context distributor.
39 public class DistributorFlushTimerTask extends TimerTask {
40 private static final XLogger LOGGER = XLoggerFactory.getXLogger(DistributorFlushTimerTask.class);
42 // The timer for flushing
43 private Timer timer = null;
45 // The context distributor to flush
46 private final Distributor contextDistributor;
49 private long flushPeriod = 0;
50 private long flushCount = 0;
53 * Constructor, save a reference to the event stream handler.
55 * @param contextDistributor the distributor that this timer task is flushing
56 * @throws ContextException On flush setup errors
58 public DistributorFlushTimerTask(final Distributor contextDistributor) throws ContextException {
59 // Save the context distributor and period
60 this.contextDistributor = contextDistributor;
62 // Set the period for persistence flushing
63 final PersistorParameters persistorParameters = ParameterService
64 .get(ContextParameterConstants.PERSISTENCE_GROUP_NAME);
65 flushPeriod = persistorParameters.getFlushPeriod();
68 timer = new Timer(DistributorFlushTimerTask.class.getSimpleName(), true);
69 timer.schedule(this, flushPeriod, flushPeriod);
71 LOGGER.debug("context distributor {} flushing set up with interval: {} ms", contextDistributor.getKey().getId(),
76 * Flush the context distributor.
80 // Increment the flush counter
83 LOGGER.debug("context distributor {} flushing: period={}: count={}", contextDistributor.getKey().getId(),
84 flushPeriod, flushCount);
86 contextDistributor.flush();
87 LOGGER.debug("context distributor {} flushed: period={}: count={}", contextDistributor.getKey().getId(),
88 flushPeriod, flushCount);
89 } catch (final ContextException e) {
90 LOGGER.error("flush error on context distributor {}: period={}: count={}",
91 contextDistributor.getKey().getId(), flushPeriod, flushCount, e);
98 * @return true, if cancel
101 public boolean cancel() {
113 public String toString() {
114 return "ContextDistributorFlushTimerTask [period=" + flushPeriod + ", flushCount=" + flushCount + "]";