FileCacheMonitor.java

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package com.sun.enterprise.v3.services.impl.monitor;

import com.sun.enterprise.v3.services.impl.monitor.stats.FileCacheStatsProvider;
import org.glassfish.grizzly.http.server.filecache.FileCache;
import org.glassfish.grizzly.http.server.filecache.FileCacheEntry;
import org.glassfish.grizzly.http.server.filecache.FileCacheProbe;

/**
 *
 * @author oleksiys
 */
public class FileCacheMonitor implements FileCacheProbe {
    private final GrizzlyMonitoring grizzlyMonitoring;
    private final String monitoringId;

    public FileCacheMonitor(GrizzlyMonitoring grizzlyMonitoring,
            String monitoringId, FileCache config) {
        this.grizzlyMonitoring = grizzlyMonitoring;
        this.monitoringId = monitoringId;

        if (grizzlyMonitoring != null) {
            final FileCacheStatsProvider statsProvider =
                    grizzlyMonitoring.getFileCacheStatsProvider(monitoringId);
            if (statsProvider != null) {
                statsProvider.setStatsObject(config);
            }

//            statsProvider.reset();
        }
    }

    @Override
    public void onEntryAddedEvent(final FileCache fileCache, final FileCacheEntry entry) {
        grizzlyMonitoring.getFileCacheProbeProvider().incOpenCacheEntriesEvent(monitoringId);
        switch (entry.type) {
            case HEAP: {
                grizzlyMonitoring.getFileCacheProbeProvider().addHeapSizeEvent(monitoringId, entry.getFileSize(false));
                break;
            }
            case MAPPED: {
                grizzlyMonitoring.getFileCacheProbeProvider().addMappedMemorySizeEvent(monitoringId, entry.getFileSize(false));
                break;
            }
            default: {
                throw new IllegalStateException("Unexpected type: " + entry.type);
            }
        }

    }

    @Override
    public void onEntryRemovedEvent(final FileCache fileCache, final FileCacheEntry entry) {
        grizzlyMonitoring.getFileCacheProbeProvider().decOpenCacheEntriesEvent(monitoringId);
        switch (entry.type) {
            case HEAP: {
                grizzlyMonitoring.getFileCacheProbeProvider().subHeapSizeEvent(monitoringId, entry.getFileSize(false));
                break;
            }
            case MAPPED: {
                grizzlyMonitoring.getFileCacheProbeProvider().subMappedMemorySizeEvent(monitoringId, entry.getFileSize(false));
                break;
            }
            default: {
                throw new IllegalStateException("Unexpected type: " + entry.type);
            }
        }
    }

    @Override
    public void onEntryHitEvent(final FileCache fileCache, final FileCacheEntry entry) {
        grizzlyMonitoring.getFileCacheProbeProvider().countHitEvent(monitoringId);

        switch (entry.type) {
            case HEAP: {
                grizzlyMonitoring.getFileCacheProbeProvider().countInfoHitEvent(monitoringId);
                break;
            }
            case MAPPED: {
                grizzlyMonitoring.getFileCacheProbeProvider().countContentHitEvent(monitoringId);
                break;
            }
            default: {
                throw new IllegalStateException("Unexpected type: " + entry.type);
            }
        }
    }

    @Override
    public void onEntryMissedEvent(final FileCache fileCache, final String host, final String requestURI) {
        grizzlyMonitoring.getFileCacheProbeProvider().countMissEvent(monitoringId);
    }

    @Override
    public void onErrorEvent(final FileCache fileCache, final Throwable error) {
    }
}