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@ -2,15 +2,10 @@ package com.alibaba.excel.cache;
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import java.io.File; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.LinkedList; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.UUID; |
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import org.ehcache.CacheManager; |
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import org.ehcache.PersistentCacheManager; |
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import org.ehcache.config.CacheConfiguration; |
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import org.ehcache.config.builders.CacheConfigurationBuilder; |
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import org.ehcache.config.builders.CacheManagerBuilder; |
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import org.ehcache.config.builders.ResourcePoolsBuilder; |
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@ -19,8 +14,8 @@ import org.slf4j.Logger;
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import org.slf4j.LoggerFactory; |
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import com.alibaba.excel.context.AnalysisContext; |
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import com.alibaba.excel.util.CollectionUtils; |
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import com.alibaba.excel.util.FileUtils; |
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import com.alibaba.excel.util.StringUtils; |
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/** |
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* Default cache |
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@ -30,87 +25,64 @@ import com.alibaba.excel.util.StringUtils;
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public class Ehcache implements ReadCache { |
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private static final Logger LOGGER = LoggerFactory.getLogger(Ehcache.class); |
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private static final int BATCH_COUNT = 1000; |
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private static final int CHECK_INTERVAL = 1000; |
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private static final String CACHE = "cache"; |
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private static final String DATA_SEPARATOR = "@"; |
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private static final String KEY_VALUE_SEPARATOR = "!"; |
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private static final String SPECIAL_SEPARATOR = "&"; |
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private static final String ESCAPED_DATA_SEPARATOR = "&d;"; |
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private static final String ESCAPED_KEY_VALUE_SEPARATOR = "&kv;"; |
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private static final String ESCAPED_SPECIAL_SEPARATOR = "&s;"; |
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private static final int DEBUG_WRITE_SIZE = 100 * 10000; |
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private static final int DEBUG_CACHE_MISS_SIZE = 1000; |
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/** |
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* Key index |
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*/ |
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private int index = 0; |
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/** |
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* Maximum number of cache activation |
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*/ |
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private int maxCacheActivate = 100; |
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private StringBuilder data = new StringBuilder(); |
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private CacheManager cacheManager; |
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private HashMap<Integer, String> dataMap = new HashMap<Integer, String>(BATCH_COUNT * 4 / 3 + 1); |
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private static CacheManager fileCacheManager; |
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private static CacheConfiguration<Integer, HashMap> fileCacheConfiguration; |
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private static CacheManager activeCacheManager; |
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private CacheConfiguration<Integer, HashMap> activeCacheConfiguration; |
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/** |
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* Bulk storage data |
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*/ |
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private org.ehcache.Cache<Integer, String> cache; |
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private org.ehcache.Cache<Integer, HashMap> fileCache; |
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/** |
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* Currently active cache |
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*/ |
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private Map<Integer, Map<Integer, String>> cacheMap = new HashMap<Integer, Map<Integer, String>>(); |
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/** |
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* Count how many times get |
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*/ |
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private int getCount = 0; |
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/** |
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* Count active cache |
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* |
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*/ |
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private LinkedList<Integer> countList = new LinkedList<Integer>(); |
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/** |
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* Count the last {@link #CHECK_INTERVAL} used |
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*/ |
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private Set<Integer> lastCheckIntervalUsedSet = new HashSet<Integer>(); |
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private org.ehcache.Cache<Integer, HashMap> activeCache; |
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private String cacheAlias; |
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/** |
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* Count the number of cache misses |
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*/ |
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private int cacheMiss = 0; |
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public Ehcache() {} |
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public Ehcache(int maxCacheActivateSize) { |
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activeCacheConfiguration = CacheConfigurationBuilder |
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.newCacheConfigurationBuilder(Integer.class, HashMap.class, |
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ResourcePoolsBuilder.newResourcePoolsBuilder().heap(maxCacheActivateSize, MemoryUnit.MB)) |
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.withSizeOfMaxObjectGraph(1000 * 1000L).withSizeOfMaxObjectSize(maxCacheActivateSize, MemoryUnit.MB) |
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.build(); |
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} |
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public Ehcache(int maxCacheActivate) { |
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this.maxCacheActivate = maxCacheActivate; |
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static { |
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File cacheFile = FileUtils.createCacheTmpFile(); |
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fileCacheManager = |
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CacheManagerBuilder.newCacheManagerBuilder().with(CacheManagerBuilder.persistence(cacheFile)).build(true); |
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activeCacheManager = CacheManagerBuilder.newCacheManagerBuilder().build(true); |
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fileCacheConfiguration = CacheConfigurationBuilder |
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.newCacheConfigurationBuilder(Integer.class, HashMap.class, |
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ResourcePoolsBuilder.newResourcePoolsBuilder().disk(10, MemoryUnit.GB)) |
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.withSizeOfMaxObjectGraph(1000 * 1000L).withSizeOfMaxObjectSize(10, MemoryUnit.GB).build(); |
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} |
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@Override |
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public void init(AnalysisContext analysisContext) { |
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File readTempFile = analysisContext.readWorkbookHolder().getTempFile(); |
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if (readTempFile == null) { |
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readTempFile = FileUtils.createCacheTmpFile(); |
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analysisContext.readWorkbookHolder().setTempFile(readTempFile); |
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} |
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File cacheFile = new File(readTempFile.getPath(), UUID.randomUUID().toString()); |
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PersistentCacheManager persistentCacheManager = |
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CacheManagerBuilder.newCacheManagerBuilder().with(CacheManagerBuilder.persistence(cacheFile)) |
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.withCache(CACHE, CacheConfigurationBuilder.newCacheConfigurationBuilder(Integer.class, String.class, |
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ResourcePoolsBuilder.newResourcePoolsBuilder().disk(10, MemoryUnit.GB))) |
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.build(true); |
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cacheManager = persistentCacheManager; |
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cache = persistentCacheManager.getCache(CACHE, Integer.class, String.class); |
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cacheAlias = UUID.randomUUID().toString(); |
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fileCache = fileCacheManager.createCache(cacheAlias, fileCacheConfiguration); |
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activeCache = activeCacheManager.createCache(cacheAlias, activeCacheConfiguration); |
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} |
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@Override |
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public void put(String value) { |
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data.append(index).append(KEY_VALUE_SEPARATOR).append(escape(value)).append(DATA_SEPARATOR); |
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dataMap.put(index, value); |
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if ((index + 1) % BATCH_COUNT == 0) { |
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cache.put(index / BATCH_COUNT, data.toString()); |
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data = new StringBuilder(); |
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fileCache.put(index / BATCH_COUNT, dataMap); |
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dataMap = new HashMap<Integer, String>(BATCH_COUNT * 4 / 3 + 1); |
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} |
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index++; |
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if (LOGGER.isDebugEnabled()) { |
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@ -120,102 +92,37 @@ public class Ehcache implements ReadCache {
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} |
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} |
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private String escape(String str) { |
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if (StringUtils.isEmpty(str)) { |
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return str; |
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} |
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str = str.replaceAll(SPECIAL_SEPARATOR, ESCAPED_SPECIAL_SEPARATOR); |
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str = str.replaceAll(DATA_SEPARATOR, ESCAPED_DATA_SEPARATOR); |
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str = str.replaceAll(KEY_VALUE_SEPARATOR, ESCAPED_KEY_VALUE_SEPARATOR); |
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return str; |
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} |
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private String unescape(String str) { |
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if (StringUtils.isEmpty(str)) { |
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return str; |
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} |
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str = str.replaceAll(ESCAPED_KEY_VALUE_SEPARATOR, KEY_VALUE_SEPARATOR); |
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str = str.replaceAll(ESCAPED_DATA_SEPARATOR, DATA_SEPARATOR); |
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str = str.replaceAll(ESCAPED_SPECIAL_SEPARATOR, SPECIAL_SEPARATOR); |
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return str; |
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} |
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@Override |
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public String get(Integer key) { |
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if (key == null || key < 0) { |
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return null; |
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} |
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getCount++; |
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int route = key / BATCH_COUNT; |
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if (cacheMap.containsKey(route)) { |
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lastCheckIntervalUsedSet.add(route); |
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String value = cacheMap.get(route).get(key); |
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checkClear(); |
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return value; |
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} |
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Map<Integer, String> tempCacheMap = new HashMap<Integer, String>(BATCH_COUNT / 3 * 4 + 1); |
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String batchData = cache.get(route); |
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String[] dataStrings = batchData.split(DATA_SEPARATOR); |
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for (String dataString : dataStrings) { |
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String[] keyValue = dataString.split(KEY_VALUE_SEPARATOR); |
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tempCacheMap.put(Integer.valueOf(keyValue[0]), unescape(keyValue[1])); |
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} |
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countList.add(route); |
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cacheMap.put(route, tempCacheMap); |
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HashMap<Integer, String> dataMap = activeCache.get(route); |
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if (dataMap == null) { |
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dataMap = fileCache.get(route); |
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activeCache.put(route, dataMap); |
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if (LOGGER.isDebugEnabled()) { |
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if (cacheMiss++ % DEBUG_CACHE_MISS_SIZE == 0) { |
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LOGGER.debug("Cache misses count:{}", cacheMiss); |
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} |
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} |
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lastCheckIntervalUsedSet.add(route); |
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String value = tempCacheMap.get(key); |
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checkClear(); |
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return value; |
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} |
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private void checkClear() { |
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if (countList.size() > maxCacheActivate) { |
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Integer route = countList.getFirst(); |
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countList.removeFirst(); |
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cacheMap.remove(route); |
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} |
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if (getCount++ % CHECK_INTERVAL != 0) { |
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return; |
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} |
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Iterator<Map.Entry<Integer, Map<Integer, String>>> iterator = cacheMap.entrySet().iterator(); |
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while (iterator.hasNext()) { |
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Map.Entry<Integer, Map<Integer, String>> entry = iterator.next(); |
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if (lastCheckIntervalUsedSet.contains(entry.getKey())) { |
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continue; |
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} |
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// Last 'CHECK_INTERVAL' not use
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iterator.remove(); |
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if (LOGGER.isDebugEnabled()) { |
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LOGGER.debug("Cache remove because {} times unused.", CHECK_INTERVAL); |
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} |
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Iterator<Integer> countIterator = countList.iterator(); |
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while (countIterator.hasNext()) { |
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Integer route = countIterator.next(); |
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if (route.equals(entry.getKey())) { |
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countIterator.remove(); |
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break; |
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} |
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} |
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} |
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lastCheckIntervalUsedSet.clear(); |
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return dataMap.get(key); |
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} |
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@Override |
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public void putFinished() { |
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if (StringUtils.isEmpty(data.toString())) { |
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if (CollectionUtils.isEmpty(dataMap)) { |
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return; |
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} |
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cache.put(index / BATCH_COUNT, data.toString()); |
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fileCache.put(index / BATCH_COUNT, dataMap); |
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} |
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@Override |
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public void destroy() { |
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cacheManager.close(); |
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fileCacheManager.removeCache(cacheAlias); |
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activeCacheManager.removeCache(cacheAlias); |
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} |
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} |
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Jiaju Zhuang
5 years ago