com.netflix.archaius.config.polling.FixedPollingStrategy Maven / Gradle / Ivy
/**
* Copyright 2015 Netflix, Inc.
*
* 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.
*/
package com.netflix.archaius.config.polling;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.netflix.archaius.api.config.PollingStrategy;
import com.netflix.archaius.util.Futures;
import com.netflix.archaius.util.ThreadFactories;
public class FixedPollingStrategy implements PollingStrategy {
private static final Logger LOG = LoggerFactory.getLogger(FixedPollingStrategy.class);
private final ScheduledExecutorService executor;
private final long interval;
private final TimeUnit units;
public FixedPollingStrategy(long interval, TimeUnit units) {
this.executor = Executors.newSingleThreadScheduledExecutor(ThreadFactories.newNamedDaemonThreadFactory("Archaius-Poller-%d"));
this.interval = interval;
this.units = units;
}
@Override
public Future execute(final Runnable callback) {
while (true) {
try {
callback.run();
break;
}
catch (Exception e) {
try {
LOG.warn("Fail to poll the polling source", e);
units.sleep(interval);
}
catch (InterruptedException e1) {
Thread.currentThread().interrupt();
return Futures.immediateFailure(e);
}
}
}
return executor.scheduleWithFixedDelay(new Runnable() {
@Override
public void run() {
try {
callback.run();
} catch (Exception e) {
LOG.warn("Failed to load properties", e);
}
}
}, interval, interval, units);
}
@Override
public void shutdown() {
executor.shutdown();
}
}