Example usage for com.google.common.cache RemovalCause COLLECTED

Introduction

In this page you can find the example usage for com.google.common.cache RemovalCause COLLECTED.

Prototype

RemovalCause COLLECTED

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Document

The entry was removed automatically because its key or value was garbage-collected.

Usage

From source file:com.infinities.skyport.distributed.impl.hazelcast.hazeltask.executor.DistributedFutureTracker.java

public DistributedFutureTracker(final IExecutorTopologyService topologyService, long maxFutureWaitTime,
        TimeUnit unit) {//from w  w w .  j a v  a2s .com
    this.topologyService = topologyService;
    futures = CacheBuilder.newBuilder()
            // no future will wait for more than this time
            .expireAfterAccess(maxFutureWaitTime, unit)
            .removalListener(new RemovalListener<String, DistributedFuture<Object>>() {

                @Override
                public void onRemoval(RemovalNotification<String, DistributedFuture<Object>> notification) {
                    if (notification.getCause() == RemovalCause.EXPIRED) {
                        DistributedFuture<Object> future = notification.getValue();
                        long waitTimeMillis = System.currentTimeMillis() - future.getCreatedTime();
                        notification.getValue()
                                .setException(new TimeoutException("Future timed out waiting.  Waited "
                                        + (TimeUnit.MILLISECONDS.toMinutes(waitTimeMillis)) + " minutes"));

                        topologyService.cancelTask(future.getTaskId());
                        topologyService.removePendingTask(future.getTaskId());
                    } else if (notification.getCause() == RemovalCause.COLLECTED) {
                        // future was GC'd because we didn't
                        // want to track it
                        logger.debug("Future {} was garabge collected and removed from the tracker",
                                notification.getKey());
                    }
                }
            }).build();
}

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