/// <summary>
/// Public constructor, initializing the eviction thread with the default <see cref="TimeEvictionStrategy"/>
/// and <see cref="SpaceEvictionStrategy"/> strategies.
/// </summary>
/// <param name="logger">Logger to write some debug output</param>
/// <param name="beaconCache">The Beacon cache to check if entries need to be evicted</param>
/// <param name="configuration">Beacon cache configuration</param>
/// <param name="timingProvider">Timing provider required for time retrieval</param>
internal BeaconCacheEvictor(ILogger logger, IBeaconCache beaconCache, IBeaconCacheConfiguration configuration, ITimingProvider timingProvider) :
this(logger, beaconCache)
{
strategies = new IBeaconCacheEvictionStrategy[]
{
new TimeEvictionStrategy(logger, beaconCache, configuration, timingProvider, () => IsShutdownRequested),
new SpaceEvictionStrategy(logger, beaconCache, configuration, () => IsShutdownRequested)
};
}
private SpaceEvictionStrategy CreateSpaceEvictionStrategyWith(IBeaconCacheConfiguration config)
{
return(new SpaceEvictionStrategy(
mockLogger,
mockBeaconCache,
config,
isShutdownFunc
));
}
internal TimeEvictionStrategy(ILogger logger, IBeaconCache beaconCache, IBeaconCacheConfiguration configuration, ITimingProvider timingProvider, Func <bool> isShutdownFunc)
{
this.logger = logger;
this.beaconCache = beaconCache;
this.configuration = configuration;
this.timingProvider = timingProvider;
this.isShutdownFunc = isShutdownFunc;
LastRunTimestamp = -1;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="logger">instance implementing the <see cref="ILogger"/> interface for writing some useful debug messages.</param>
/// <param name="beaconCache">The beacon cache to evict if necessary.</param>
/// <param name="configuration"></param>
/// <param name="isShutdownFunc">a callback function deciding if the eviction strategy should stop execution or not.</param>
internal SpaceEvictionStrategy(ILogger logger,
IBeaconCache beaconCache,
IBeaconCacheConfiguration configuration,
Func <bool> isShutdownFunc)
{
this.logger = logger;
this.beaconCache = beaconCache;
this.configuration = configuration;
this.isShutdownFunc = isShutdownFunc;
}
private TimeEvictionStrategy CreateTimeEvictionStrategyWith(IBeaconCacheConfiguration config)
{
return(new TimeEvictionStrategy(
mockLogger,
mockBeaconCache,
config,
mockTimingProvider,
isShutdownFunc
));
}
