Java Code Examples for org.apache.ibatis.mapping.MappedStatement#isFlushCacheRequired()

The following examples show how to use org.apache.ibatis.mapping.MappedStatement#isFlushCacheRequired() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: BaseExecutor.java    From mybaties with Apache License 2.0 5 votes vote down vote up 
@SuppressWarnings("unchecked")
@Override
public <E> List<E> query(MappedStatement ms, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, CacheKey key, BoundSql boundSql) throws SQLException {
  ErrorContext.instance().resource(ms.getResource()).activity("executing a query").object(ms.getId());
  //如果已经关闭，报错
  if (closed) {
    throw new ExecutorException("Executor was closed.");
  }
  //先清局部缓存，再查询.但仅查询堆栈为0，才清。为了处理递归调用
  if (queryStack == 0 && ms.isFlushCacheRequired()) {
    clearLocalCache();
  }
  List<E> list;
  try {
    //加一,这样递归调用到上面的时候就不会再清局部缓存了
    queryStack++;
    //先根据cachekey从localCache去查
    list = resultHandler == null ? (List<E>) localCache.getObject(key) : null;
    if (list != null) {
      //若查到localCache缓存，处理localOutputParameterCache
      handleLocallyCachedOutputParameters(ms, key, parameter, boundSql);
    } else {
      //从数据库查
      list = queryFromDatabase(ms, parameter, rowBounds, resultHandler, key, boundSql);
    }
  } finally {
    //清空堆栈
    queryStack--;
  }
  if (queryStack == 0) {
    //延迟加载队列中所有元素
    for (DeferredLoad deferredLoad : deferredLoads) {
      deferredLoad.load();
    }
    // issue #601
    //清空延迟加载队列
    deferredLoads.clear();
    if (configuration.getLocalCacheScope() == LocalCacheScope.STATEMENT) {
      // issue #482
  	//如果是STATEMENT，清本地缓存
      clearLocalCache();
    }
  }
  return list;
}
Example 2
Source File: CachingExecutor.java    From mybaties with Apache License 2.0 4 votes vote down vote up 
private void flushCacheIfRequired(MappedStatement ms) {
  Cache cache = ms.getCache();
  if (cache != null && ms.isFlushCacheRequired()) {      
    tcm.clear(cache);
  }
}
Example 3
Source File: BaseExecutor.java    From mybatis with Apache License 2.0 4 votes vote down vote up 
@SuppressWarnings("unchecked")
@Override
public <E> List<E> query(MappedStatement ms, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, CacheKey key, BoundSql boundSql) throws SQLException {
  ErrorContext.instance().resource(ms.getResource()).activity("executing a query").object(ms.getId());
  //如果已经关闭，报错
  if (closed) {
    throw new ExecutorException("Executor was closed.");
  }
  //先清局部缓存，再查询.但仅查询堆栈为0，才清。为了处理递归调用
  if (queryStack == 0 && ms.isFlushCacheRequired()) {
    clearLocalCache();
  }
  List<E> list;
  try {
    //加一,这样递归调用到上面的时候就不会再清局部缓存了
    queryStack++;
    //先根据cachekey从localCache去查
    list = resultHandler == null ? (List<E>) localCache.getObject(key) : null;
    if (list != null) {
      //若查到localCache缓存，处理localOutputParameterCache
      handleLocallyCachedOutputParameters(ms, key, parameter, boundSql);
    } else {
      //从数据库查
      list = queryFromDatabase(ms, parameter, rowBounds, resultHandler, key, boundSql);
    }
  } finally {
    //清空堆栈
    queryStack--;
  }
  if (queryStack == 0) {
    //延迟加载队列中所有元素
    for (DeferredLoad deferredLoad : deferredLoads) {
      deferredLoad.load();
    }
    // issue #601
    //清空延迟加载队列
    deferredLoads.clear();
    if (configuration.getLocalCacheScope() == LocalCacheScope.STATEMENT) {
      // issue #482
  	//如果是STATEMENT，清本地缓存
      clearLocalCache();
    }
  }
  return list;
}
Example 4
Source File: CachingExecutor.java    From mybatis with Apache License 2.0 4 votes vote down vote up 
private void flushCacheIfRequired(MappedStatement ms) {
  Cache cache = ms.getCache();
  if (cache != null && ms.isFlushCacheRequired()) {      
    tcm.clear(cache);
  }
}