Issue #2309 Make CachingDataStore more smarter.
Change-Id: Icb8c5ddc0ed9c648f4e2609b9801a695745f7600 Former-commit-id:83a91dac47[formerly 8343b7256c6d2a034d57714b0d7966282b758290] Former-commit-id:503282475c
This commit is contained in:
Ben Steffensmeier
parent
f4f205e5a7
commit
b5c045f6b4
5 changed files with 726 additions and 171 deletions
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@ -19,13 +19,14 @@
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**/
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package com.raytheon.uf.viz.thinclient.cave.cache;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.security.MessageDigest;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import com.raytheon.uf.common.datastorage.DataStoreFactory;
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import com.raytheon.uf.common.datastorage.IDataStore;
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import com.raytheon.uf.common.datastorage.Request;
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import com.raytheon.uf.common.datastorage.StorageException;
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@ -33,57 +34,37 @@ import com.raytheon.uf.common.datastorage.StorageProperties;
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import com.raytheon.uf.common.datastorage.StorageProperties.Compression;
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import com.raytheon.uf.common.datastorage.StorageStatus;
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import com.raytheon.uf.common.datastorage.records.IDataRecord;
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import com.raytheon.uf.common.serialization.DynamicSerializationManager;
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import com.raytheon.uf.common.serialization.DynamicSerializationManager.SerializationType;
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import com.raytheon.uf.common.serialization.SerializationUtil;
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import com.raytheon.uf.common.util.cache.LRUCacheFS;
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/**
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* Data store used to cache requests to the filesystem to save bandwidth
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* Data store which wraps with another {@link IDataStore}. This data store will
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* always check with its cache before using the delegate and adds all results to
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* the cache.
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*
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* <pre>
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*
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* SOFTWARE HISTORY
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*
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* Date Ticket# Engineer Description
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* ------------ ---------- ----------- --------------------------
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* Nov 8, 2011 mschenke Initial creation
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* Feb 12, 2013 #1608 randerso Added explicit deletes for groups and datasets
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* Date Ticket# Engineer Description
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* ------------- -------- ----------- --------------------------
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* Nov 08, 2011 mschenke Initial creation
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* Feb 12, 2013 1608 randerso Added explicit deletes for groups and
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* datasets
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* Sep 18, 2013 2309 bsteffen Move disk acces to DataStoreCache
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*
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* </pre>
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*
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* @author mschenke
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* @version 1.0
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*/
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/**
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* TODO Add Description
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*
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* <pre>
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*
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* SOFTWARE HISTORY
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*
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* Date Ticket# Engineer Description
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* ------------ ---------- ----------- --------------------------
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* Feb 12, 2013 randerso Initial creation
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*
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* </pre>
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*
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* @author randerso
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* @version 1.0
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*/
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public class CachingDataStore implements IDataStore {
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// quick byte string to hex conversion
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private static final String HEXES = "0123456789ABCDEF";
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private final IDataStore delegate;
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private IDataStore delegate;
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private DataStoreCache cache;
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private File cacheDir;
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CachingDataStore(IDataStore delegate, File cacheDir) {
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CachingDataStore(IDataStore delegate, DataStoreCache cache) {
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this.delegate = delegate;
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this.cacheDir = cacheDir;
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this.cache = cache;
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}
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/*
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@ -95,16 +76,36 @@ public class CachingDataStore implements IDataStore {
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@Override
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public IDataRecord[] retrieve(String group) throws StorageException,
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FileNotFoundException {
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IDataRecord[] records = null;
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File cacheFile = getCacheFile(group);
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if (cacheFile != null && cacheFile.exists()) {
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records = retrieveFromCache(cacheFile, IDataRecord[].class);
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String[] datasets = cache.getDatasetNames(group);
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if (datasets != null) {
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List<String> datasetGroupPaths = new ArrayList<String>(
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datasets.length);
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List<IDataRecord> records = new ArrayList<IDataRecord>();
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for (String dataset : datasets) {
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String datasetGroupPath = toDatasetGroupPath(group, dataset);
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IDataRecord record = cache.getDataset(datasetGroupPath,
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Request.ALL);
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if (record == null) {
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datasetGroupPaths.add(datasetGroupPath);
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} else {
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records.add(record);
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}
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}
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if (!datasetGroupPaths.isEmpty()) {
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IDataRecord[] newRecords = retrieveDatasets(
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datasetGroupPaths.toArray(new String[0]), Request.ALL);
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for (int i = 0; i < newRecords.length; i += 1) {
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cache.cacheDataset(datasetGroupPaths.get(i), newRecords[i],
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Request.ALL);
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}
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records.addAll(Arrays.asList(newRecords));
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}
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return records.toArray(new IDataRecord[0]);
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} else {
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IDataRecord[] records = delegate.retrieve(group);
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cacheDatasets(group, Arrays.asList(records), Request.ALL);
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return records;
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}
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if (records == null) {
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records = delegate.retrieve(group);
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storeToCache(cacheFile, records);
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}
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return records;
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}
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/*
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@ -117,16 +118,12 @@ public class CachingDataStore implements IDataStore {
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@Override
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public IDataRecord[] retrieve(String group, boolean includeInterpolated)
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throws StorageException, FileNotFoundException {
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IDataRecord[] records = null;
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File cacheFile = getCacheFile(new Object[] { group, includeInterpolated });
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if (cacheFile != null && cacheFile.exists()) {
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records = retrieveFromCache(cacheFile, IDataRecord[].class);
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if (includeInterpolated == false) {
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return retrieve(group);
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} else {
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/* This is deprecated and unused so caching is not implemented. */
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return delegate.retrieve(group, includeInterpolated);
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}
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if (records == null) {
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records = delegate.retrieve(group, includeInterpolated);
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storeToCache(cacheFile, records);
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}
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return records;
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}
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/*
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@ -139,14 +136,11 @@ public class CachingDataStore implements IDataStore {
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@Override
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public IDataRecord retrieve(String group, String dataset, Request request)
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throws StorageException, FileNotFoundException {
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IDataRecord record = null;
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File cacheFile = getCacheFile(new Object[] { group, dataset, request });
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if (cacheFile != null && cacheFile.exists()) {
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record = retrieveFromCache(cacheFile, IDataRecord.class);
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}
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String datasetGroupPath = toDatasetGroupPath(group, dataset);
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IDataRecord record = cache.getDataset(datasetGroupPath, request);
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if (record == null) {
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record = delegate.retrieve(group, dataset, request);
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storeToCache(cacheFile, record);
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cache.cacheDataset(datasetGroupPath, record, request);
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}
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return record;
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}
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@ -159,18 +153,33 @@ public class CachingDataStore implements IDataStore {
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* .String[], com.raytheon.uf.common.datastorage.Request)
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*/
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@Override
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public IDataRecord[] retrieveDatasets(String[] datasetGroupPath,
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public IDataRecord[] retrieveDatasets(String[] datasetGroupPaths,
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Request request) throws StorageException, FileNotFoundException {
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IDataRecord[] records = null;
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File cacheFile = getCacheFile(new Object[] { datasetGroupPath, request });
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if (cacheFile != null && cacheFile.exists()) {
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records = retrieveFromCache(cacheFile, IDataRecord[].class);
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Map<String, IDataRecord> records = new HashMap<String, IDataRecord>();
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List<String> toRequest = new ArrayList<String>(datasetGroupPaths.length);
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for (String datasetGroupPath : datasetGroupPaths) {
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IDataRecord record = cache.getDataset(datasetGroupPath, request);
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if (record == null) {
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toRequest.add(datasetGroupPath);
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} else {
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records.put(datasetGroupPath, record);
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}
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}
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if (records == null) {
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records = delegate.retrieveDatasets(datasetGroupPath, request);
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storeToCache(cacheFile, records);
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if (!toRequest.isEmpty()) {
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IDataRecord[] newRecords = delegate.retrieveDatasets(
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toRequest.toArray(new String[0]), request);
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for (int i = 0; i < newRecords.length; i += 1) {
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String datasetGroupPath = toRequest.get(i);
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IDataRecord record = newRecords[i];
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cache.cacheDataset(datasetGroupPath, record, request);
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records.put(datasetGroupPath, record);
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}
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}
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return records;
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IDataRecord[] result = new IDataRecord[datasetGroupPaths.length];
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for (int i = 0; i < datasetGroupPaths.length; i += 1) {
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result[i] = records.get(datasetGroupPaths[i]);
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}
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return result;
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}
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/*
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@ -183,16 +192,50 @@ public class CachingDataStore implements IDataStore {
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@Override
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public IDataRecord[] retrieveGroups(String[] groups, Request request)
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throws StorageException, FileNotFoundException {
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IDataRecord[] records = null;
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File cacheFile = getCacheFile(new Object[] { groups, request });
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if (cacheFile != null && cacheFile.exists()) {
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records = retrieveFromCache(cacheFile, IDataRecord[].class);
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List<String> toRequest = new ArrayList<String>();
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Map<String, List<IDataRecord>> records = new HashMap<String, List<IDataRecord>>();
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for (String group : groups) {
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String[] datasets = cache.getDatasetNames(group);
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if (datasets != null) {
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IDataRecord[] cachedRecords = new IDataRecord[datasets.length];
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for (int i = 0; i < datasets.length; i += 1) {
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cachedRecords[i] = cache.getDataset(
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toDatasetGroupPath(group, datasets[i]),
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request);
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if (cachedRecords[i] == null) {
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toRequest.add(group);
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cachedRecords = null;
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break;
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}
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}
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if (cachedRecords != null) {
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records.put(group, Arrays.asList(cachedRecords));
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}
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} else {
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toRequest.add(group);
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}
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}
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if (records == null) {
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records = delegate.retrieveGroups(groups, request);
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storeToCache(cacheFile, records);
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if (!toRequest.isEmpty()) {
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IDataRecord[] newRecords = delegate.retrieveGroups(
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toRequest.toArray(new String[0]), request);
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for (IDataRecord record : newRecords) {
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String group = getGroup(record);
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List<IDataRecord> groupRecs = records.get(group);
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if (groupRecs == null) {
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groupRecs = new ArrayList<IDataRecord>();
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records.put(group, groupRecs);
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}
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groupRecs.add(record);
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}
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for (String group : toRequest) {
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cacheDatasets(group, records.get(group), request);
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}
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}
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return records;
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List<IDataRecord> result = new ArrayList<IDataRecord>();
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for (String group : groups) {
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result.addAll(records.get(group));
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}
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return result.toArray(new IDataRecord[0]);
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}
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/*
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@ -205,96 +248,43 @@ public class CachingDataStore implements IDataStore {
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@Override
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public String[] getDatasets(String group) throws StorageException,
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FileNotFoundException {
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String[] datasets = null;
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File cacheFile = getCacheFile(group);
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if (cacheFile != null && cacheFile.exists()) {
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datasets = retrieveFromCache(cacheFile, String[].class);
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}
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String[] datasets = cache.getDatasetNames(group);
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if (datasets == null) {
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datasets = delegate.getDatasets(group);
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storeToCache(cacheFile, datasets);
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cache.cacheDatasetNames(group, datasets);
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}
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return datasets;
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}
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@SuppressWarnings("unchecked")
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private <T> T retrieveFromCache(File file, Class<T> clazz) {
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long t0 = System.currentTimeMillis();
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T rval = null;
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try {
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FileInputStream fin = new FileInputStream(file);
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Object fromFile = DynamicSerializationManager.getManager(
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SerializationType.Thrift).deserialize(fin);
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fin.close();
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if (clazz.isInstance(fromFile)) {
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rval = (T) fromFile;
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}
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} catch (Throwable e) {
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System.err.println("Error retreiving object from cache file: "
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+ e.getLocalizedMessage());
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}
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// Caching utility methods
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if (rval != null) {
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LRUCacheFS.poll(file);
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/**
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* Cache all datasets for a group. Both the indivdual datasets and the names
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* of the datasets are cached.
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*/
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private void cacheDatasets(String group, List<IDataRecord> records,
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Request request) {
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String[] datasets = new String[records.size()];
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for (int i = 0; i < datasets.length; i += 1) {
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datasets[i] = records.get(i).getName();
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cache.cacheDataset(toDatasetGroupPath(group, datasets[i]),
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records.get(i), request);
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}
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System.out.println("Time to retreive from cache = "
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+ (System.currentTimeMillis() - t0) + "ms");
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return rval;
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cache.cacheDatasetNames(group, datasets);
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}
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private void storeToCache(File file, Object result) {
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long t0 = System.currentTimeMillis();
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if (result != null) {
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try {
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if (!file.getParentFile().exists()) {
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file.getParentFile().mkdirs();
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}
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FileOutputStream fout = new FileOutputStream(file);
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DynamicSerializationManager
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.getManager(SerializationType.Thrift).serialize(result,
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fout);
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fout.close();
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LRUCacheFS.poll(file);
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file.setReadable(true, false);
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file.setWritable(true, false);
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} catch (Exception e) {
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System.err.println("Error storing object to file: "
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+ e.getLocalizedMessage());
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}
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}
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System.out.println("Time to store to cache = "
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+ (System.currentTimeMillis() - t0) + "ms");
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private static String getGroup(IDataRecord record) {
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String group = record.getGroup();
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/*
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* TODO this works around a bug in older pypies. Delete it after 14.2.1
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* is fielded everywhere.
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*/
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group = group.replaceAll("::", DataStoreFactory.DEF_SEPARATOR);
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return group;
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}
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private File getCacheFile(Object obj) {
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long t0 = System.currentTimeMillis();
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try {
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byte[] thriftDigest = SerializationUtil.transformToThrift(obj);
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MessageDigest md = MessageDigest.getInstance("MD5");
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md.update(thriftDigest);
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String md5sum = toHex(md.digest());
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return new File(cacheDir, md5sum);
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} catch (Exception e) {
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System.err.println("Error getting cache file: "
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+ e.getLocalizedMessage());
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} finally {
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System.out.println("Time to getCacheFile = "
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+ (System.currentTimeMillis() - t0) + "ms");
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}
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return null;
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}
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private static String toHex(byte[] raw) {
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if (raw == null) {
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return null;
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}
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final StringBuilder hex = new StringBuilder(2 * raw.length);
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for (final byte b : raw) {
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hex.append(HEXES.charAt((b & 0xF0) >> 4)).append(
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HEXES.charAt((b & 0x0F)));
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}
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return hex.toString();
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private static String toDatasetGroupPath(String group, String dataset) {
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return group + DataStoreFactory.DEF_SEPARATOR + dataset;
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}
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// Non-caching methods
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@ -37,9 +37,11 @@ import com.raytheon.uf.viz.thinclient.preferences.ThinClientPreferenceConstants;
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*
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* SOFTWARE HISTORY
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*
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* Date Ticket# Engineer Description
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* ------------ ---------- ----------- --------------------------
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* Nov 8, 2011 mschenke Initial creation
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* Date Ticket# Engineer Description
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* ------------- -------- ----------- --------------------------
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* Nov 08, 2011 mschenke Initial creation
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* Sep 18, 2013 2309 bsteffen Share a single DataStoreCache for all
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* data stores.
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*
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* </pre>
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*
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@ -54,15 +56,16 @@ public class CachingDataStoreFactory implements IDataStoreFactory,
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private boolean cachingData;
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private File cacheDir;
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private DataStoreCache cache;
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public CachingDataStoreFactory(IDataStoreFactory delegateFactory) {
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this.delegateFactory = delegateFactory;
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IPreferenceStore store = Activator.getDefault().getPreferenceStore();
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cachingData = store
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.getBoolean(ThinClientPreferenceConstants.P_CACHE_WEATHER);
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cacheDir = new File(
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File cacheDir = new File(
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store.getString(ThinClientPreferenceConstants.P_CACHE_DIR));
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cache = new DataStoreCache(cacheDir);
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store.addPropertyChangeListener(this);
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}
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@ -77,7 +80,7 @@ public class CachingDataStoreFactory implements IDataStoreFactory,
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public IDataStore getDataStore(File file, boolean useLocking) {
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IDataStore dataStore = delegateFactory.getDataStore(file, useLocking);
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if (cachingData) {
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dataStore = new CachingDataStore(dataStore, cacheDir);
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dataStore = new CachingDataStore(dataStore, cache);
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}
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return dataStore;
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}
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@ -96,7 +99,8 @@ public class CachingDataStoreFactory implements IDataStoreFactory,
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cachingData = Boolean.valueOf(String.valueOf(event.getNewValue()));
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} else if (ThinClientPreferenceConstants.P_CACHE_DIR.equals(event
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.getProperty())) {
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cacheDir = new File(String.valueOf(event.getNewValue()));
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File cacheDir = new File(String.valueOf(event.getNewValue()));
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cache = new DataStoreCache(cacheDir);
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}
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}
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@ -0,0 +1,555 @@
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/**
|
||||
* This software was developed and / or modified by Raytheon Company,
|
||||
* pursuant to Contract DG133W-05-CQ-1067 with the US Government.
|
||||
*
|
||||
* U.S. EXPORT CONTROLLED TECHNICAL DATA
|
||||
* This software product contains export-restricted data whose
|
||||
* export/transfer/disclosure is restricted by U.S. law. Dissemination
|
||||
* to non-U.S. persons whether in the United States or abroad requires
|
||||
* an export license or other authorization.
|
||||
*
|
||||
* Contractor Name: Raytheon Company
|
||||
* Contractor Address: 6825 Pine Street, Suite 340
|
||||
* Mail Stop B8
|
||||
* Omaha, NE 68106
|
||||
* 402.291.0100
|
||||
*
|
||||
* See the AWIPS II Master Rights File ("Master Rights File.pdf") for
|
||||
* further licensing information.
|
||||
**/
|
||||
package com.raytheon.uf.viz.thinclient.cave.cache;
|
||||
|
||||
import java.awt.Point;
|
||||
import java.awt.Rectangle;
|
||||
import java.io.File;
|
||||
import java.io.FileInputStream;
|
||||
import java.io.FileOutputStream;
|
||||
import java.lang.ref.Reference;
|
||||
import java.lang.ref.SoftReference;
|
||||
import java.nio.Buffer;
|
||||
import java.nio.ByteBuffer;
|
||||
import java.nio.FloatBuffer;
|
||||
import java.nio.IntBuffer;
|
||||
import java.nio.ShortBuffer;
|
||||
import java.security.MessageDigest;
|
||||
import java.util.Arrays;
|
||||
import java.util.Collections;
|
||||
import java.util.HashMap;
|
||||
import java.util.HashSet;
|
||||
import java.util.Iterator;
|
||||
import java.util.Map;
|
||||
import java.util.Map.Entry;
|
||||
import java.util.Set;
|
||||
|
||||
import com.raytheon.uf.common.datastorage.DataStoreFactory;
|
||||
import com.raytheon.uf.common.datastorage.IDataStore;
|
||||
import com.raytheon.uf.common.datastorage.Request;
|
||||
import com.raytheon.uf.common.datastorage.Request.Type;
|
||||
import com.raytheon.uf.common.datastorage.records.ByteDataRecord;
|
||||
import com.raytheon.uf.common.datastorage.records.FloatDataRecord;
|
||||
import com.raytheon.uf.common.datastorage.records.IDataRecord;
|
||||
import com.raytheon.uf.common.datastorage.records.IntegerDataRecord;
|
||||
import com.raytheon.uf.common.datastorage.records.ShortDataRecord;
|
||||
import com.raytheon.uf.common.serialization.DynamicSerializationManager;
|
||||
import com.raytheon.uf.common.serialization.DynamicSerializationManager.SerializationType;
|
||||
import com.raytheon.uf.common.status.IUFStatusHandler;
|
||||
import com.raytheon.uf.common.status.UFStatus;
|
||||
import com.raytheon.uf.common.status.UFStatus.Priority;
|
||||
import com.raytheon.uf.common.util.cache.LRUCacheFS;
|
||||
import com.raytheon.uf.viz.core.data.BufferSlicer;
|
||||
|
||||
/**
|
||||
* Caching layer used by {@link CachingDataStore}. Caches two things:
|
||||
* <ul>
|
||||
* <li>
|
||||
* For a group all dataset names are cached.</li>
|
||||
* <li>
|
||||
* For a dataset a IDataRecord is cached for each request that has been
|
||||
* performed.</li>
|
||||
* </ul>
|
||||
*
|
||||
* These two pieces of information together can fulfill any {@link IDataStore}
|
||||
* request if the data has been requested before. This class maintains a short
|
||||
* lived memory cache using {@link SoftReference} and also a persistent disk
|
||||
* cache.
|
||||
*
|
||||
* In addition to simply caching java objects this class also compares new
|
||||
* {@link Request} objects to what is already in the cache and attempts to reuse
|
||||
* cached {@link IDataRecord} objects whenever possible.
|
||||
*
|
||||
* <pre>
|
||||
*
|
||||
* SOFTWARE HISTORY
|
||||
*
|
||||
* Date Ticket# Engineer Description
|
||||
* ------------- -------- ----------- --------------------------
|
||||
* Sep 18, 2013 2309 bsteffen Initial creation
|
||||
*
|
||||
* </pre>
|
||||
*
|
||||
* @author bsteffen
|
||||
* @version 1.0
|
||||
* @see IDataStore
|
||||
*/
|
||||
|
||||
public class DataStoreCache {
|
||||
|
||||
private static final transient IUFStatusHandler statusHandler = UFStatus
|
||||
.getHandler(DataStoreCache.class, "ThinClient");
|
||||
|
||||
// quick byte string to hex conversion
|
||||
private static final String HEXES = "0123456789ABCDEF";
|
||||
|
||||
private final File cacheDir;
|
||||
|
||||
private final Map<String, Reference<String[]>> namesMemoryCache;
|
||||
|
||||
private final Map<String, Reference<Map<Request, IDataRecord>>> dataMemoryCache;
|
||||
|
||||
/**
|
||||
* Construct a DataStoreCache that will store cache files in the given
|
||||
* cacheDir.
|
||||
*
|
||||
* @param cacheDir
|
||||
* directory for storing files. If the directory does not exist
|
||||
* it will be created. If the directory cannot be created or
|
||||
* written too then disk caching will not work and lots of
|
||||
* warnings will be sent to UFStatus.
|
||||
*/
|
||||
public DataStoreCache(File cacheDir) {
|
||||
this.cacheDir = cacheDir;
|
||||
this.namesMemoryCache = Collections
|
||||
.synchronizedMap(new HashMap<String, Reference<String[]>>());
|
||||
this.dataMemoryCache = Collections
|
||||
.synchronizedMap(new HashMap<String, Reference<Map<Request, IDataRecord>>>());
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the dataset names for a group from this cache.
|
||||
*
|
||||
* @param group
|
||||
* the name of a group, must not be null
|
||||
* @return an array of dataset names or null if they are not in this cache
|
||||
* @see IDataStore#getDatasets(String)
|
||||
* @see #cacheDatasetNames(String, String[])
|
||||
*/
|
||||
public String[] getDatasetNames(String group) {
|
||||
String[] names = getNamesFromMemory(group);
|
||||
if (names == null) {
|
||||
names = getNamesFromFile(group);
|
||||
if (names != null) {
|
||||
cacheNamesInMemory(group, names);
|
||||
}
|
||||
}
|
||||
return names;
|
||||
}
|
||||
|
||||
/**
|
||||
* Stores dataset names for a group in this cache. The names can be
|
||||
* retrieved from the cache using {@link #getDatasetNames(String)}
|
||||
*
|
||||
* @param group
|
||||
* the name of a group, must not be null
|
||||
* @param datasetNames
|
||||
* the names of all datasets in the group, must not be null
|
||||
* @see #getDatasetNames(String)
|
||||
*/
|
||||
public void cacheDatasetNames(String group, String[] datasetNames) {
|
||||
cacheNamesInMemory(group, datasetNames);
|
||||
cacheNamesInFile(group, datasetNames);
|
||||
}
|
||||
|
||||
private String[] getNamesFromMemory(String group) {
|
||||
Reference<String[]> ref = namesMemoryCache.get(group);
|
||||
if (ref != null) {
|
||||
return ref.get();
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
private String[] getNamesFromFile(String group) {
|
||||
File cacheFile = getCacheFile(group);
|
||||
if (cacheFile != null && cacheFile.exists()) {
|
||||
return retrieveFromCache(cacheFile, String[].class);
|
||||
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
private void cacheNamesInMemory(String group, String[] names) {
|
||||
namesMemoryCache.put(group, new SoftReference<String[]>(names));
|
||||
}
|
||||
|
||||
private void cacheNamesInFile(String group, String[] names) {
|
||||
storeToCache(getCacheFile(group), names);
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets an {@link IDataRecord} for a specific dataset/group path and request
|
||||
* from this cache.
|
||||
*
|
||||
* @param datasetGroupPath
|
||||
* the group and dataset concatenated together with a
|
||||
* {@link DataStoreFactory#DEF_SEPARATOR}, must not be null.
|
||||
* @param request
|
||||
* the request defining the portion of the dataset that is
|
||||
* needed, must not be null.
|
||||
* @return an IDataRecord or null if it is not in the cache.
|
||||
* @see IDataStore#retrieveDatasets(String[], Request)
|
||||
* @see #cacheDataset(String, IDataRecord, Request)
|
||||
*/
|
||||
public IDataRecord getDataset(String datasetGroupPath, Request request) {
|
||||
Map<Request, IDataRecord> data = getData(datasetGroupPath);
|
||||
if (data == null) {
|
||||
return null;
|
||||
} else {
|
||||
synchronized (data) {
|
||||
if (data.containsKey(request)) {
|
||||
return data.get(request);
|
||||
} else {
|
||||
for (Entry<Request, IDataRecord> entry : data.entrySet()) {
|
||||
Request cachedRequest = entry.getKey();
|
||||
if (contains(cachedRequest, request)) {
|
||||
IDataRecord newRecord = slice(request,
|
||||
cachedRequest, entry.getValue());
|
||||
if (newRecord != null) {
|
||||
return newRecord;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Stores a portion of a dataset corresponding to request in this cache. The
|
||||
* record can be retrieved from the cache using
|
||||
* {@link #getDataset(String, Request)}
|
||||
*
|
||||
* @param datasetGroupPath
|
||||
* the group and dataset concatenated together with a
|
||||
* {@link DataStoreFactory#DEF_SEPARATOR}, must not be null.
|
||||
* @param record
|
||||
* the data record containing data corresponding to the request,
|
||||
* must not be null.
|
||||
* @param request
|
||||
* the request defining the portion of the dataset that is
|
||||
* needed, must not be null.
|
||||
* @see #getDataset(String, Request)
|
||||
*/
|
||||
public void cacheDataset(String datasetGroupPath, IDataRecord record,
|
||||
Request request) {
|
||||
Map<Request, IDataRecord> data = getData(datasetGroupPath);
|
||||
if (data != null) {
|
||||
synchronized (data) {
|
||||
/*
|
||||
* Minimize the size of the cache by ensuring any requests that
|
||||
* are a subset of another request are not cached.
|
||||
*/
|
||||
Iterator<Request> it = data.keySet().iterator();
|
||||
while (it.hasNext()) {
|
||||
Request cachedRequest = it.next();
|
||||
if (contains(cachedRequest, request)) {
|
||||
return;
|
||||
} else if (contains(request, cachedRequest)) {
|
||||
it.remove();
|
||||
}
|
||||
}
|
||||
data.put(request, record);
|
||||
cacheDataInFile(datasetGroupPath, data);
|
||||
}
|
||||
} else {
|
||||
data = new HashMap<Request, IDataRecord>();
|
||||
data.put(request, record);
|
||||
cacheData(datasetGroupPath, data);
|
||||
}
|
||||
}
|
||||
|
||||
private Map<Request, IDataRecord> getData(String datasetGroupPath) {
|
||||
Map<Request, IDataRecord> data = getDataFromMemory(datasetGroupPath);
|
||||
if (data == null) {
|
||||
data = getDataFromFile(datasetGroupPath);
|
||||
if (data != null) {
|
||||
cacheDataInMemory(datasetGroupPath, data);
|
||||
}
|
||||
}
|
||||
return data;
|
||||
}
|
||||
|
||||
private Map<Request, IDataRecord> getDataFromMemory(String datasetGroupPath) {
|
||||
Reference<Map<Request, IDataRecord>> ref = dataMemoryCache
|
||||
.get(datasetGroupPath);
|
||||
if (ref != null) {
|
||||
return ref.get();
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
private Map<Request, IDataRecord> getDataFromFile(String datasetGroupPath) {
|
||||
File cacheFile = getCacheFile(datasetGroupPath);
|
||||
if (cacheFile != null && cacheFile.exists()) {
|
||||
return retrieveFromCache(cacheFile, Map.class);
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
private void cacheData(String datasetGroupPath,
|
||||
Map<Request, IDataRecord> data) {
|
||||
cacheDataInMemory(datasetGroupPath, data);
|
||||
cacheDataInFile(datasetGroupPath, data);
|
||||
}
|
||||
|
||||
private void cacheDataInMemory(String datasetGroupPath,
|
||||
Map<Request, IDataRecord> data) {
|
||||
dataMemoryCache.put(datasetGroupPath,
|
||||
new SoftReference<Map<Request, IDataRecord>>(data));
|
||||
}
|
||||
|
||||
private void cacheDataInFile(String datasetGroupPath,
|
||||
Map<Request, IDataRecord> data) {
|
||||
storeToCache(getCacheFile(datasetGroupPath), data);
|
||||
}
|
||||
|
||||
/**
|
||||
* Determine if the data returned by outer contains enough of the data to
|
||||
* fulfill inner.
|
||||
*
|
||||
* @return true if outer has enough data for inner, false if not.
|
||||
*/
|
||||
private static boolean contains(Request outer, Request inner) {
|
||||
Type outerType = outer.getType();
|
||||
Type innerType = outer.getType();
|
||||
if (outerType == Type.ALL) {
|
||||
return true;
|
||||
} else if (outerType == Type.SLAB) {
|
||||
if (innerType == Type.SLAB) {
|
||||
return getRectangle(outer).contains(getRectangle(inner));
|
||||
}
|
||||
if (innerType == Type.POINT) {
|
||||
Rectangle rect = getRectangle(outer);
|
||||
for (Point p : inner.getPoints()) {
|
||||
if (!rect.contains(p)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
} else if (outerType == Type.POINT) {
|
||||
if (innerType == Type.POINT) {
|
||||
Set<Point> outerSet = new HashSet<Point>(Arrays.asList(outer
|
||||
.getPoints()));
|
||||
for (Point p : inner.getPoints()) {
|
||||
if (!outerSet.contains(p)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a new {@link IDataRecord} with a subset of the data in
|
||||
* cachedRecord. The new record will be the data needed to fulfill
|
||||
* newRequest. This method chould only be used if cacheRequest contains
|
||||
* newRequest.
|
||||
*/
|
||||
private static IDataRecord slice(Request newRequest, Request cacheRequest,
|
||||
IDataRecord cachedRecord) {
|
||||
Type cacheType = cacheRequest.getType();
|
||||
Type newType = newRequest.getType();
|
||||
if (cacheType == Type.ALL) {
|
||||
if (newType == Type.SLAB) {
|
||||
return sliceAllToSlab(newRequest, cacheRequest, cachedRecord);
|
||||
}
|
||||
} else if (cacheType == Type.SLAB) {
|
||||
if (newType == Type.SLAB) {
|
||||
return sliceSlabToSlab(newRequest, cacheRequest, cachedRecord);
|
||||
}
|
||||
|
||||
}
|
||||
return null;
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Specialized slice handling for getting a slab record from an ALL request.
|
||||
*/
|
||||
private static IDataRecord sliceAllToSlab(Request newRequest,
|
||||
Request cacheRequest, IDataRecord cachedRecord) {
|
||||
Buffer buffer = toBuffer(cachedRecord);
|
||||
if (buffer == null) {
|
||||
return null;
|
||||
}
|
||||
Rectangle newRect = getRectangle(newRequest);
|
||||
long[] sizes = cachedRecord.getSizes();
|
||||
Rectangle cacheRect = new Rectangle((int) sizes[0], (int) sizes[1]);
|
||||
buffer = BufferSlicer.slice(buffer, newRect, cacheRect);
|
||||
IDataRecord newRecord = toDataRecord(buffer, newRect, cachedRecord);
|
||||
return newRecord;
|
||||
}
|
||||
|
||||
/**
|
||||
* Specialized slice handling for getting a slab record from a larger slab
|
||||
* record.
|
||||
*/
|
||||
private static IDataRecord sliceSlabToSlab(Request newRequest,
|
||||
Request cacheRequest, IDataRecord cachedRecord) {
|
||||
Buffer buffer = toBuffer(cachedRecord);
|
||||
if (buffer == null) {
|
||||
return null;
|
||||
}
|
||||
Rectangle newRect = getRectangle(newRequest);
|
||||
Rectangle cacheRect = getRectangle(cacheRequest);
|
||||
buffer = BufferSlicer.slice(buffer, newRect, cacheRect);
|
||||
IDataRecord newRecord = toDataRecord(buffer, newRect, cachedRecord);
|
||||
return newRecord;
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract the raw numeric data from a {@link IDataRecord} in {@link Buffer}
|
||||
* form.
|
||||
*/
|
||||
private static Buffer toBuffer(IDataRecord record) {
|
||||
if (record instanceof FloatDataRecord) {
|
||||
return FloatBuffer.wrap(((FloatDataRecord) record).getFloatData());
|
||||
} else if (record instanceof IntegerDataRecord) {
|
||||
return IntBuffer.wrap(((IntegerDataRecord) record).getIntData());
|
||||
} else if (record instanceof ShortDataRecord) {
|
||||
return ShortBuffer.wrap(((ShortDataRecord) record).getShortData());
|
||||
} else if (record instanceof ByteDataRecord) {
|
||||
return ByteBuffer.wrap(((ByteDataRecord) record).getByteData());
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a {@link Buffer} into an {@link IDataRecord}, the record will
|
||||
* have dataset attributes bfrom copy but with new sizes.
|
||||
*/
|
||||
private static IDataRecord toDataRecord(Buffer buffer, Rectangle sizes,
|
||||
IDataRecord copy) {
|
||||
String name = copy.getName();
|
||||
String group = copy.getGroup();
|
||||
IDataRecord record = null;
|
||||
if (buffer instanceof FloatBuffer) {
|
||||
record = new FloatDataRecord(name, group,
|
||||
((FloatBuffer) buffer).array());
|
||||
} else if (buffer instanceof IntBuffer) {
|
||||
record = new IntegerDataRecord(name, group,
|
||||
((IntBuffer) buffer).array());
|
||||
} else if (buffer instanceof ShortBuffer) {
|
||||
record = new ShortDataRecord(name, group,
|
||||
((ShortBuffer) buffer).array());
|
||||
} else if (buffer instanceof ByteBuffer) {
|
||||
record = new ByteDataRecord(name, group,
|
||||
((ByteBuffer) buffer).array());
|
||||
} else {
|
||||
return null;
|
||||
}
|
||||
record.setSizes(new long[] { sizes.width, sizes.height });
|
||||
record.setDataAttributes(copy.getDataAttributes());
|
||||
record.setDimension(copy.getDimension());
|
||||
record.setFillValue(copy.getFillValue());
|
||||
record.setProperties(copy.getProperties());
|
||||
return record;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert a slab {@link Request} into a {@link Rectangle}.
|
||||
*/
|
||||
private static Rectangle getRectangle(Request request) {
|
||||
int[] max = request.getMaxIndexForSlab();
|
||||
int[] min = request.getMinIndexForSlab();
|
||||
return new Rectangle(min[0], min[1], max[0] - min[0], max[1] - min[1]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get a unique File to store a cached object
|
||||
*/
|
||||
private File getCacheFile(String obj) {
|
||||
try {
|
||||
MessageDigest md = MessageDigest.getInstance("MD5");
|
||||
md.update(obj.getBytes());
|
||||
String md5sum = toHex(md.digest());
|
||||
return new File(cacheDir, md5sum);
|
||||
} catch (Exception e) {
|
||||
statusHandler.handle(Priority.WARN, "Error getting cache file", e);
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Load a java object from a cache file.
|
||||
*
|
||||
* @param file
|
||||
* the file containing the object
|
||||
* @param clazz
|
||||
* the type of the object we are expecting
|
||||
* @return an object of type clazz loaded from file.
|
||||
*/
|
||||
private static <T> T retrieveFromCache(File file, Class<T> clazz) {
|
||||
T rval = null;
|
||||
try {
|
||||
FileInputStream fin = new FileInputStream(file);
|
||||
Object fromFile = DynamicSerializationManager.getManager(
|
||||
SerializationType.Thrift).deserialize(fin);
|
||||
fin.close();
|
||||
if (clazz.isInstance(fromFile)) {
|
||||
rval = clazz.cast(fromFile);
|
||||
}
|
||||
} catch (Throwable e) {
|
||||
statusHandler.handle(Priority.WARN,
|
||||
"Error retreiving object from cache file", e);
|
||||
}
|
||||
|
||||
if (rval != null) {
|
||||
LRUCacheFS.poll(file);
|
||||
}
|
||||
return rval;
|
||||
}
|
||||
|
||||
/**
|
||||
* Store a java object into a file
|
||||
*/
|
||||
private static void storeToCache(File file, Object result) {
|
||||
if (result != null) {
|
||||
try {
|
||||
if (!file.getParentFile().exists()) {
|
||||
file.getParentFile().mkdirs();
|
||||
}
|
||||
FileOutputStream fout = new FileOutputStream(file);
|
||||
DynamicSerializationManager
|
||||
.getManager(SerializationType.Thrift).serialize(result,
|
||||
fout);
|
||||
fout.close();
|
||||
LRUCacheFS.poll(file);
|
||||
file.setReadable(true, false);
|
||||
file.setWritable(true, false);
|
||||
} catch (Exception e) {
|
||||
statusHandler.handle(Priority.WARN,
|
||||
"Error storing object to file", e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert some bytes to hex, used to generate unique file names.
|
||||
*/
|
||||
private static String toHex(byte[] raw) {
|
||||
if (raw == null) {
|
||||
return null;
|
||||
}
|
||||
final StringBuilder hex = new StringBuilder(2 * raw.length);
|
||||
for (final byte b : raw) {
|
||||
hex.append(HEXES.charAt((b & 0xF0) >> 4)).append(
|
||||
HEXES.charAt((b & 0x0F)));
|
||||
}
|
||||
return hex.toString();
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -32,13 +32,16 @@ import com.raytheon.uf.common.serialization.ISerializableObject;
|
|||
*
|
||||
* <pre>
|
||||
* SOFTWARE HISTORY
|
||||
* Date Ticket# Engineer Description
|
||||
* ------------ ---------- ----------- --------------------------
|
||||
* Feb 9, 2007 chammack Initial Creation.
|
||||
* Apr 1, 2008 chammack Added delete API
|
||||
* Aug 3, 2009 chammack Modified to support Request
|
||||
* Sep 27, 2010 5091 njensen Added deleteFiles(String)
|
||||
* Feb 12, 2013 #1608 randerso Added explicit methods for deleting groups and datasets
|
||||
* Date Ticket# Engineer Description
|
||||
* ------------- -------- ----------- --------------------------
|
||||
* Feb 09, 2007 chammack Initial Creation.
|
||||
* Apr 01, 2008 chammack Added delete API
|
||||
* Aug 03, 2009 chammack Modified to support Request
|
||||
* Sep 27, 2010 5091 njensen Added deleteFiles(String)
|
||||
* Feb 12, 2013 1608 randerso Added explicit methods for deleting
|
||||
* groups and datasets
|
||||
* Sep 19, 2013 2309 bsteffen Deprecate retrieve(String, boolean)
|
||||
*
|
||||
*
|
||||
* </pre>
|
||||
*
|
||||
|
|
@ -155,6 +158,7 @@ public interface IDataStore extends ISerializableObject {
|
|||
* @throws StorageException
|
||||
* @throws FileNotFoundException
|
||||
*/
|
||||
@Deprecated
|
||||
public abstract IDataRecord[] retrieve(String group,
|
||||
boolean includeInterpolated) throws StorageException,
|
||||
FileNotFoundException;
|
||||
|
|
|
|||
|
|
@ -28,6 +28,8 @@
|
|||
# Date Ticket# Engineer Description
|
||||
# ------------ ---------- ----------- --------------------------
|
||||
# 07/21/10 njensen Initial Creation.
|
||||
# 09/19/13 2309 bsteffen Fix group name in returned
|
||||
# records.
|
||||
#
|
||||
#
|
||||
#
|
||||
|
|
@ -57,7 +59,7 @@ def createStorageRecord(rawData, ds):
|
|||
parentName = '/'
|
||||
slashIndex = name.rfind('/')
|
||||
if slashIndex > -1:
|
||||
parentName = name[0:slashIndex]
|
||||
parentName = name[0:slashIndex].replace('::','/')
|
||||
name = name[slashIndex+1:]
|
||||
inst.setName(name)
|
||||
inst.setGroup(parentName)
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue