Package org.apache.ibatis.cache

Examples of org.apache.ibatis.cache.CacheKey

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  private CacheKey createUniqueResultKey(List<ResultMapping> resultMappings, Object resultObject, CacheKey parentCacheKey) {
    if (resultObject == null) {
      return null;
    } else {
      MetaObject metaResultObject = MetaObject.forObject(resultObject);
      CacheKey cacheKey = new CacheKey();
      cacheKey.update(parentCacheKey);
      boolean updated = false;
      if (typeHandlerRegistry.hasTypeHandler(resultObject.getClass())) {
        cacheKey.update(resultObject);
      } else {
        for (ResultMapping resultMapping : resultMappings) {
          if (resultMapping.getNestedQueryId() == null) {
            String propName = resultMapping.getProperty();
            if (propName != null) {
              cacheKey.update(metaResultObject.getValue(propName));
              updated = true;
            }
          }
        }
      }
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  protected void handleRowValues(ResultSet rs, ResultMap resultMap, ResultHandler resultHandler, RowBounds rowBounds) throws SQLException {
    final DefaultResultContext resultContext = new DefaultResultContext();
    skipRows(rs, rowBounds);
    while (shouldProcessMoreRows(rs, resultContext, rowBounds)) {
      final ResultMap discriminatedResultMap = resolveDiscriminatedResultMap(rs, resultMap);
      final CacheKey rowKey = createRowKey(discriminatedResultMap, rs);
      final boolean knownValue = globalRowValueCache.containsKey(rowKey);
      Object rowValue = getRowValue(rs, discriminatedResultMap, rowKey);
      if (!knownValue) {
        resultContext.nextResultObject(rowValue);
        resultHandler.handleResult(resultContext);
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      if (nestedResultMapId != null) {
        try {
          final ResultMap nestedResultMap = getNestedResultMap(rs, nestedResultMapId);
          final Object collectionProperty = instantiateCollectionPropertyIfAppropriate(resultMapping, metaObject);

          final CacheKey parentRowKey = createRowKey(resultMap, rs);
          final CacheKey rowKey = createRowKey(nestedResultMap, rs);
          final Set<CacheKey> localRowValueCache = getRowValueCache(parentRowKey);
          final boolean knownValue = localRowValueCache.contains(rowKey);
          localRowValueCache.add(rowKey);
          Object rowValue = getRowValue(rs, nestedResultMap, rowKey);
          Set<String> notNullColumns = resultMapping.getNotNullColumns();
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  //
  // UNIQUE RESULT KEY
  //

  private CacheKey createRowKey(ResultMap resultMap, ResultSet rs) throws SQLException {
    final CacheKey cacheKey = new CacheKey();
    List<ResultMapping> resultMappings = getResultMappingsForRowKey(resultMap);
    cacheKey.update(resultMap.getId());
    if (resultMappings.size() == 0) {
      if (Map.class.isAssignableFrom(resultMap.getType())) {
        createRowKeyForMap(rs, cacheKey);
      } else {
        createRowKeyForUnmappedProperties(resultMap, rs, cacheKey);
      }
    } else {
      createRowKeyForMappedProperties(rs, cacheKey, resultMappings);
    }
    if (cacheKey.getUpdateCount() < 2) {
      return CacheKey.NULL_CACHE_KEY;
    }
    return cacheKey;
  }
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      if (cache != null) {
        flushCacheIfRequired(ms);
        cache.getReadWriteLock().readLock().lock();
        try {
          if (ms.isUseCache() && resultHandler == null) {
            CacheKey key = createCacheKey(ms, parameterObject, rowBounds);
            final List cachedList = (List) cache.getObject(key);
            if (cachedList != null) {
              return cachedList;
            } else {
              List list = delegate.query(ms, parameterObject, rowBounds, resultHandler);
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    final MappedStatement nestedQuery = configuration.getMappedStatement(nestedQueryId);
    final Class nestedQueryParameterType = nestedQuery.getParameterMap().getType();
    final Object nestedQueryParameterObject = prepareParameterForNestedQuery(rs, propertyMapping, nestedQueryParameterType);
    Object value = null;
    if (nestedQueryParameterObject != null) {
      final CacheKey key = executor.createCacheKey(nestedQuery, nestedQueryParameterObject, RowBounds.DEFAULT);
      if (executor.isCached(nestedQuery, key)) {
        executor.deferLoad(nestedQuery, metaResultObject, property, key);
      } else {
        final ResultLoader resultLoader = new ResultLoader(configuration, executor, nestedQuery, nestedQueryParameterObject, propertyMapping.getJavaType());
        if (configuration.isLazyLoadingEnabled()) {
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    ErrorContext.instance().resource(ms.getResource()).activity("executing a query").object(ms.getId());
    if (closed) throw new ExecutorException("Executor was closed.");
    List list;
    try {
      queryStack++;
      CacheKey key = createCacheKey(ms, parameter, rowBounds);
      list = resultHandler == null ? (List) localCache.getObject(key) : null;
      if (list != null) {
        handleLocallyCachedOutputParameters(ms, key, parameter);
      } else {
        list = queryFromDatabase(ms, parameter, rowBounds, resultHandler, key);
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  }

  public CacheKey createCacheKey(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
    if (closed) throw new ExecutorException("Executor was closed.");
    BoundSql boundSql = ms.getBoundSql(parameterObject);
    CacheKey cacheKey = new CacheKey();
    cacheKey.update(ms.getId());
    cacheKey.update(rowBounds.getOffset());
    cacheKey.update(rowBounds.getLimit());
    cacheKey.update(boundSql.getSql());
    List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
    if (parameterMappings.size() > 0 && parameterObject != null) {
      TypeHandlerRegistry typeHandlerRegistry = ms.getConfiguration().getTypeHandlerRegistry();
      if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
        cacheKey.update(parameterObject);
      } else {
        MetaObject metaObject = configuration.newMetaObject(parameterObject);
        for (ParameterMapping parameterMapping : parameterMappings) {
          String propertyName = parameterMapping.getProperty();
          if (metaObject.hasGetter(propertyName)) {
            cacheKey.update(metaObject.getValue(propertyName));
          } else if (boundSql.hasAdditionalParameter(propertyName)) {
            cacheKey.update(boundSql.getAdditionalParameter(propertyName));
          }
        }
      }
    }
    return cacheKey;
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    assertEquals("Expect same hashcode.", key1.hashCode(), key2.hashCode());
    assertFalse("Expect not equal", key1.equals(key2));
  }

  public void testCacheKeyWithTwoParamsSameHashcode() {
    CacheKey key1 = new CacheKey();
    CacheKey key2 = new CacheKey();

    key1.update("HS1CS001");
    key1.update("HS1D4001");

    key2.update("HS1D4001");
    key2.update("HS1CS001");

    assertEquals("Expect same hashcode.", key1.hashCode(), key2.hashCode());
    assertFalse("Expect not equal", key1.equals(key2));
  }
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        // if the current of the executor is for CachingExecutor
        final Cache cache = ms.getCache();
        // Determine whether the current query cache.
        if (executor.getClass().isAssignableFrom(CachingExecutor.class) && cache != null) {
            BoundSql boundSql = ms.getBoundSql(parameter);
            final CacheKey cacheKey = createCacheKey(ms, parameter, rowBounds, boundSql);
            if (LOG.isDebugEnabled()) {
                LOG.debug("cache executor the cache's kye  is " + cacheKey);
            }
            cache.putObject(cacheKey, result);
        }
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  • org.apache.ibatis.executor.resultset.DefaultResultSetHandler
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