当我尝试执行简单的 JPA 1.0 代码时，出现以下异常。
可能是什么原因？
5453 DevPQRWDPBSSPersist WARN [P=351601:O=0:CT] openjpa.Enhance - This configuration disallows runtime optimization, but the following listed types were not enhanced at build time or at class load time with a javaagent: "[class com.XYZ.PQR.bss.client.db.data.markerentry, class com.XYZ.PQR.bss.client.db.data.Serviceproduct, class com.XYZ.PQR.bss.client.db.data.Agreementterms, class com.XYZ.PQR.bss.client.db.data.Offeringattribute, class com.XYZ.PQR.bss.client.db.data.marker, class com.XYZ.PQR.bss.client.db.data.OfferingpriceadjustmentrelPK, class com.XYZ.PQR.bss.client.db.data.Serviceoffering, class com.XYZ.PQR.bss.client.db.data.Offeringassociation, class com.XYZ.PQR.bss.client.db.data.OfferingpriceserviceofferingrelPK, class com.XYZ.PQR.bss.client.db.data.Offer, class com.XYZ.PQR.bss.client.db.data.Offeringpriceadjustmentrel, class com.XYZ.PQR.bss.client.db.data.Offeringfamily, class com.XYZ.PQR.bss.client.db.data.Offeringpriceserviceofferingrel, class com.XYZ.PQR.bss.client.db.data.Serviceproductattribute, class com.XYZ.PQR.bss.client.db.data.Offeringprice, class com.XYZ.PQR.bss.client.db.data.Agreement]".
6563 DevPQRWDPBSSPersist TRACE [P=351601:O=0:CT] openjpa.jdbc.SQL - <t 1183336072, conn 944453707> executing prepstmnt 152307988 SELECT so.* from DB2INST1.SERVICEOFFERING so where so.ISDELETED = 0 and so.id in (select oa.SERVICEOFFERINGID from DB2INST1.OFFERINGATTRIBUTE oa where oa.SERVICEOFFERINGID = so.id AND oa.name = ? and oa.STRINGVALUE = ? and oa.ISDELETED = 0) [params=(String) productbundleid, (String) attrValue]
7281 DevPQRWDPBSSPersist TRACE [P=351601:O=0:CT] openjpa.jdbc.SQL - <t 1183336072, conn 944453707> [718 ms] spent
Exception in thread "P=351601:O=0:CT" <openjpa-1.2.1-SNAPSHOT-r422266:686069 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: An error occurred while parsing the query filter "SELECT OBJECT(attr) FROM Offeringattribute attr WHERE attr.serviceofferingid IN (:OfferingIds) AND attr.isdeleted = 0". Error message: The name "Offeringattribute" is not a recognized entity or identifier. Known entity names: []
at org.apache.openjpa.kernel.exps.AbstractExpressionBuilder.parseException(AbstractExpressionBuilder.java:118)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getClassMetaData(JPQLExpressionBuilder.java:180)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.resolveClassMetaData(JPQLExpressionBuilder.java:150)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:225)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateMetaData(JPQLExpressionBuilder.java:195)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getCandidateType(JPQLExpressionBuilder.java:188)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.access$600(JPQLExpressionBuilder.java:69)
at org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder$ParsedJPQL.populate(JPQLExpressionBuilder.java:1756)
at org.apache.openjpa.kernel.jpql.JPQLParser.populate(JPQLParser.java:56)
at org.apache.openjpa.kernel.ExpressionStoreQuery.populateFromCompilation(ExpressionStoreQuery.java:153)
at org.apache.openjpa.kernel.QueryImpl.newCompilation(QueryImpl.java:658)
at org.apache.openjpa.kernel.QueryImpl.compilationFromCache(QueryImpl.java:639)
at org.apache.openjpa.kernel.QueryImpl.compileForCompilation(QueryImpl.java:605)
at org.apache.openjpa.kernel.QueryImpl.compileForExecutor(QueryImpl.java:667)
at org.apache.openjpa.kernel.QueryImpl.getOperation(QueryImpl.java:1492)
at org.apache.openjpa.kernel.DelegatingQuery.getOperation(DelegatingQuery.java:123)
at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:243)
at org.apache.openjpa.persistence.QueryImpl.getResultList(QueryImpl.java:293)
at com.XYZ.PQR.bss.client.offering.impl.OfferingServiceImpl.getOfferingsByStringAttribute(OfferingServiceImpl.java:661)
at com.XYZ.PQR.bss.marker.impl.testAks.testAPI(testAks.java:38)
at com.XYZ.PQR.bss.marker.impl.testAks.main(testAks.java:24)
<properties>
<property name="openjpa.ConnectionDriverName" value="com.XYZ.db2.jcc.DB2Driver"/>
<property name="openjpa.ConnectionURL" value="jdbc:db2://xyz.com:50000/ABC"/>
<property name="openjpa.ConnectionUserName" value="usr"/>
<property name="openjpa.ConnectionPassword" value="pwd"/>
<property name="openjpa.jdbc.Schema" value="sch123"/>
<property name="openjpa.Log" value="SQL=TRACE" />
</properties>
跟踪的第一行警告您，您的实体没有在构建时或类加载时使用 javaagent 进行增强.
虽然我的理解是运行增强器并不是严格要求的，但跟踪的以下部分仍然是 OpenJPA 不知道的提示任何实体:
错误消息：名称“Offeringattribute”不是可识别的实体或标识符。已知实体名称：[]
看起来好像出了问题和/或 OpenJPA 没有使用任何后备机制 http://openjpa.apache.org/builds/latest/docs/docbook/manual/ref_guide_pc_enhance.html#ref_guide_pc_enhance_unenhanced_types。在日志中查找先前的警告。或者设置构建时间增强。
以下资源可能会有所帮助：
- 实体增强 http://openjpa.apache.org/entity-enhancement.html
- OpenJPA User's Guide
- Section 2. 强化 http://openjpa.apache.org/builds/latest/docs/docbook/manual/ref_guide_pc_enhance.html
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