缓存和Dynamo数据库组合问题 [英] Issue with Caching and dynamo db combination
问题描述
我正在使用AWS Elasticache,这是我在注释中使用的方法,
I am using AWS Elasticache and here is the method I am using with annotation,
@Cacheable(unless = "#result != null and #result.size() == 0")
public List<SomeObject> findById(String id) {
return dynamoDBMapper.query(SomeObject.class, queryExpression(id));
}
这是我的查询表达式,
DynamoDBQueryExpression<SomeObject> queryExpression(String id) {
SomeObject object = new SomeObject();
object.setId(id);
return new DynamoDBQueryExpression<SomeObject>()
.withIndexName("idIndex")
.withConsistentRead(false)
.withHashKeyValues(object)
.withLimit(Integer.MAX_VALUE);
}
我一直在我的应用程序日志中得到此错误,
I keep on getting this error in my application log,
java.io.NotSerializableException: com.amazonaws.services.dynamodbv2.datamodeling.PaginatedQueryList
看起来它需要PaginatedQueryList类为Serializable。虽然我正在尝试缓存List,但是不确定此PaginatedQueryList如何进入图片。
Looks like it needs the PaginatedQueryList class as Serializable. Though I am trying to cache List, not sure how this PaginatedQueryList is coming into the picture.
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推荐答案
PaginatedQueryList是返回的具体List实现通过Dynamodb的查询方法。您必须将结果复制到List的可序列化实现中,例如ArrayList。
PaginatedQueryList is the concrete List implementation returned by Dynamodb's query method. You'll have to copy your results into a serializable implementation of List, like ArrayList.
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