启动Tomcat时，DefaultPreparedStatement不可序列化

时间：2017-08-04 08:25:48

标签： java datastax-java-driver

我正在使用Cassandra 3.10，Datastax驱动程序3.1.4和Apache Lucerne索引构建器以及Spring 4.3.2构建一个在Tomcat 7.0.57中运行的webapp。 我将所有PreparedStatements准备成Spring Singleton StatementFactory，如：

selectLikeShortnameStmt = cassandraDatasource.getSession().prepare(" select  id, parent_id, ultimate_parent_id, internal_ref, short_name, long_name, controlling_team, " +
                                                " country_incorp, country_operate, company_reg, relationship_manager, credit_rating, rating_source, pd, lgd, review_date, sector, defaulted, own_bank_entity " +
                                                " from counterparty where short_name like ?");

和

selectByReviewDateAndRmQuery        = " select  id, parent_id, ultimate_parent_id, internal_ref, short_name, long_name, controlling_team, " +
                                            " country_incorp, country_operate, company_reg, relationship_manager, credit_rating, rating_source, pd, lgd, review_date, sector, defaulted, own_bank_entity " +
                                            " from counterparty where filter_column = '{ " 
                                                         + " filter : {type:\"range\", field:\"review_date\", lower:\"01-01-2000\", upper: \"%s\" },"
                                                         + " query : {type:\"contains\", field:\"relationship_manager\", values:[ \"%s\" ]},"
                                                         + " refresh:true"
                                                         + " }'";

在第一个例子中，可以使用简单的BIND方法，但是对于第二个例子，bind方法声明没有定义绑定变量，所以我使用String.format方法，但是当我启动Tomcat时，我收到一个错误，声明DefaultPreparedStatement不可序列化：

Caused by: java.io.NotSerializableException: com.datastax.driver.core.DefaultPreparedStatement
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at java.util.HashMap.internalWriteEntries(HashMap.java:1785)
at java.util.HashMap.writeObject(HashMap.java:1362)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at java.util.HashMap.internalWriteEntries(HashMap.java:1785)
at java.util.HashMap.writeObject(HashMap.java:1362)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at java.util.LinkedHashMap.internalWriteEntries(LinkedHashMap.java:333)
at java.util.HashMap.writeObject(HashMap.java:1362)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:441)
at java.util.Collections$SynchronizedMap.writeObject(Collections.java:2691)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1695)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1101)
at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:430)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:351)
at org.apache.catalina.session.StandardManager.stopInternal(StandardManager.java:516)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5683)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1591)
at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1580)
... 4 more

虽然代码根本不使用DefaultPreparedStatement。

在DAO对象中，这些是示例：

PreparedStatement pStmt = statementFactory.getSelectLikeShortnameStmt();
    BoundStatement bStmt = pStmt.bind( "%" + name + "%" );
    ResultSet rs = cassandraDatasource.getSession().execute( bStmt );

和

String query = statementFactory.getSelectByReviewDateAndTeamQuery();

    query = String.format( query, upperDate, controllingTeamCode );

    ResultSet rs = cassandraDatasource.getSession().execute( query );

1 个答案:

答案 0 :(得分：0)

由于DefaultPreparedStatement是实现接口PreparedStatement的唯一类，并且它没有实现Serializable接口，除了在Tomcat中禁用会话持久性之外似乎没有其它选项，这可以通过编辑tomcat conf中的context.xml来实现目录

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