56 lines
1.8 KiB
Java
56 lines
1.8 KiB
Java
/**
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*
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*/
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package org.gcube.documentstore.persistence;
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import java.util.concurrent.ScheduledFuture;
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import java.util.concurrent.TimeUnit;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* @author Luca Frosini (ISTI - CNR)
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*
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*/
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class PersistenceBackendRediscover implements Runnable {
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private final static Logger logger = LoggerFactory.getLogger(PersistenceBackendRediscover.class);
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//protected final ScheduledExecutorService scheduler;
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protected final String context;
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protected final FallbackPersistenceBackend fallbackPersistenceBackend;
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private ScheduledFuture<?> scheduledThread;
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public PersistenceBackendRediscover(String context,
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FallbackPersistenceBackend fallbackPersistenceBackend,
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long initialDelay, long delay, TimeUnit timeUnit){
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this.context = context;
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this.fallbackPersistenceBackend = fallbackPersistenceBackend;
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scheduledThread = ExecutorUtils.PERSISTENCE_BACKEND_REDISCOVERY_POOL.scheduleAtFixedRate(this, initialDelay, delay, timeUnit);
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}
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@Override
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public void run() {
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logger.trace("Going to rediscover {}", PersistenceBackend.class.getSimpleName());
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PersistenceBackend rediscovered = PersistenceBackendFactory.
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rediscoverPersistenceBackend(fallbackPersistenceBackend, context);
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if(!rediscovered.getClass().equals(fallbackPersistenceBackend.getClass())){
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logger.trace("Another {} was found : {}. "
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+ "Shutting down {} Thread for context {}",
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PersistenceBackend.class.getSimpleName(),
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rediscovered.getClass().getSimpleName(),
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PersistenceBackendRediscover.class.getSimpleName(),
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context);
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scheduledThread.cancel(true);
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}else{
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logger.trace("{} for context {} is still a {}. We will see if next time we will be more lucky.",
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PersistenceBackend.class.getSimpleName(),
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context,
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FallbackPersistenceBackend.class.getSimpleName());
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}
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}
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}
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