大家好，
祝你有个愉快的一天。在我的maven项目中，我使用JPA进行后端通信和eclipse-link。但是当我尝试在我的Model组件上执行延迟加载时，我收到了上述警告信息。我已经将插件添加到pom.xml，并且还在persistent.xml中，添加了，仍然无法解决我的问题。请有人帮帮我。下面是我的实体类。
Gdu.java
package com.model;
import com.fasterxml.jackson.annotation.JsonIdentityInfo;
import com.fasterxml.jackson.annotation.ObjectIdGenerators;
import java.io.Serializable;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
@Entity
@Table(name = "GDU")
@NamedQueries({
@NamedQuery(name = "Gdu.findAll", query = "SELECT g FROM Gdu g"),
@NamedQuery(name = "Gdu.findByGduId", query = "SELECT g FROM Gdu g WHERE g.gduId = :gduId"),
@NamedQuery(name = "Gdu.findByName", query = "SELECT g FROM Gdu g WHERE g.name = :name"),
@NamedQuery(name = "Gdu.findByHttpPort", query = "SELECT g FROM Gdu g WHERE g.httpPort = :httpPort"),
@NamedQuery(name = "Gdu.findByModbusPort", query = "SELECT g FROM Gdu g WHERE g.modbusPort = :modbusPort")})
@SequenceGenerator(name="SEQ5", sequenceName="gduSeq", allocationSize=1)
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class, property="@gduId")
public class Gdu implements Serializable {
private static final long serialVersionUID = 1L;
// @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ5")
@Basic(optional = false)
@NotNull
@Column(name = "GDU_ID")
private BigDecimal gduId;
@Size(max = 10)
@Column(name = "NAME")
private String name;
@Basic(optional = false)
@NotNull
@Column(name = "HTTP_PORT")
private BigInteger httpPort;
@Basic(optional = false)
@NotNull
@Column(name = "MODBUS_PORT")
private BigInteger modbusPort;
@JoinColumn(name = "PLANT_ID", referencedColumnName = "PLANT_ID")
@ManyToOne(optional = false, fetch = FetchType.LAZY)
private Plant plantId;
@OneToMany(mappedBy = "gduId", fetch = FetchType.LAZY)
private Collection<Inverter> inverterCollection;
@JoinColumn(name = "GDUTYPE_ID", referencedColumnName = "GDUTYPE_ID")
@ManyToOne(optional = false,fetch = FetchType.LAZY)
private Gdutype gdutypeId;
public Gdu() {
}
public Gdu(BigDecimal gduId) {
this.gduId = gduId;
}
public Gdu(BigDecimal gduId, BigInteger httpPort, BigInteger modbusPort) {
this.gduId = gduId;
this.httpPort = httpPort;
this.modbusPort = modbusPort;
}
//override equals and hashcode and setters and getters are here
}
这里对于plantId和gdutypeId我收到了警告。
The warning is : [EL Info]: 2014-09-05 14:39:14.144--ServerSession(1385008216)--EclipseLink, version: Eclipse Persistence Services - 2.4.0.v20120608-r11652
[EL Warning]: metadata: 2014-09-05 14:39:14.264--ServerSession(1385008216)--Reverting the lazy setting on the OneToOne or ManyToOne attribute [gdutypeId] for the entity class [class com.model.Gdu] since weaving was not enabled or did not occur.
[EL Warning]: metadata: 2014-09-05 14:39:14.264--ServerSession(1385008216)--Reverting the lazy setting on the OneToOne or ManyToOne attribute [plantId] for the entity class [class com.model.Gdu] since weaving was not enabled or did not occur.
请帮帮我。提前谢谢。
Here is Inverter and Plant and GduType. Please have a look
package com.model;
//imports are here
@Entity
@Table(name = "GDUTYPE")
@NamedQueries({
@NamedQuery(name = "Gdutype.findAll", query = "SELECT g FROM Gdutype g"),
@NamedQuery(name = "Gdutype.findByGdutypeId", query = "SELECT g FROM Gdutype g WHERE g.gdutypeId = :gdutypeId"),
@NamedQuery(name = "Gdutype.findByProductName", query = "SELECT g FROM Gdutype g WHERE g.productName = :productName"),
@NamedQuery(name = "Gdutype.findByApiName", query = "SELECT g FROM Gdutype g WHERE g.apiName = :apiName"),
@NamedQuery(name = "Gdutype.findByApiVersion", query = "SELECT g FROM Gdutype g WHERE g.apiVersion = :apiVersion")})
public class Gdutype implements Serializable {
private static final long serialVersionUID = 1L;
// @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Id
@Basic(optional = false)
@NotNull
@Column(name = "GDUTYPE_ID")
private BigDecimal gdutypeId;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 10)
@Column(name = "PRODUCT_NAME")
private String productName;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 10)
@Column(name = "API_NAME")
private String apiName;
@Size(max = 5)
@Column(name = "API_VERSION")
private String apiVersion;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "gdutypeId",fetch = FetchType.LAZY)
private Collection<Gdu> gduCollection;
public Gdutype() {
}
public Gdutype(BigDecimal gdutypeId) {
this.gdutypeId = gdutypeId;
}
public Gdutype(BigDecimal gdutypeId, String productName, String apiName) {
this.gdutypeId = gdutypeId;
this.productName = productName;
this.apiName = apiName;
}
//setters and getters ,hashcode,equals
}
package com.model;
@Entity
@Table(name = "INVERTER")
@NamedQueries({
@NamedQuery(name = "Inverter.findAll", query = "SELECT i FROM Inverter i"),
@NamedQuery(name = "Inverter.findByInverterId", query = "SELECT i FROM Inverter i WHERE i.inverterId = :inverterId"),
@NamedQuery(name = "Inverter.findByName", query = "SELECT i FROM Inverter i WHERE i.name = :name"),
@NamedQuery(name = "Plant.findByNominalPower", query = "SELECT p FROM Plant p WHERE p.nominalPower = :nominalPower")})
@SequenceGenerator(name="SEQ4", sequenceName="inverterSeq", allocationSize=1)
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class, property="@inverterId")
public class Inverter implements Serializable {
private static final long serialVersionUID = 1L;
// @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ4")
@Basic(optional = false)
@NotNull
@Column(name = "INVERTER_ID")
private BigDecimal inverterId;
@Size(max = 45)
@Column(name = "NAME")
private String name;
@Basic(optional = false)
@NotNull
@Column(name = "NOMINAL_POWER")
private double nominalPower;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "inverterId", fetch = FetchType.LAZY)
private Collection<Mppt> mpptCollection;
@JoinColumn(name = "PLANT_ID", referencedColumnName = "PLANT_ID")
@ManyToOne(optional = false, , fetch = FetchType.LAZY)
private Plant plantId;
@JoinColumn(name = "PCI_ID", referencedColumnName = "PCI_ID")
@ManyToOne(" fetch = FetchType.LAZY)
private Pci pciId;
@JoinColumn(name = "INVERTERTYPE_ID", referencedColumnName = "IT_ID")
@ManyToOne(optional = false, fetch = FetchType.LAZY)
private Invertertype invertertypeId;
@JoinColumn(name = "GDU_ID", referencedColumnName = "GDU_ID")
@ManyToOne(fetch = FetchType.LAZY)
private Gdu gduId;
public Inverter() { }
}
package com.model;
@Entity
@Table(name = "PLANT")
@NamedQueries({
@NamedQuery(name = "Plant.findAll", query = "SELECT p FROM Plant p"),
@NamedQuery(name = "Plant.findByPlantId", query = "SELECT p FROM Plant p WHERE p.plantId = :plantId"),
@NamedQuery(name = "Plant.findByName", query = "SELECT p FROM Plant p WHERE p.name = :name"),
@NamedQuery(name = "Plant.findByOperator", query = "SELECT p FROM Plant p WHERE p.operator = :operator"),
@NamedQuery(name = "Plant.findByCommissioning", query = "SELECT p FROM Plant p WHERE p.commissioning = :commissioning"),
@NamedQuery(name = "Plant.findByNominalPower", query = "SELECT p FROM Plant p WHERE p.nominalPower = :nominalPower"),
@NamedQuery(name = "Plant.findByContador", query = "SELECT p FROM Plant p WHERE p.contador = :contador")})
@SequenceGenerator(name="SEQ2", sequenceName="plantSeq", allocationSize=1)
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class, property="@plantId")
public class Plant implements Serializable {
private static final long serialVersionUID = 1L;
// @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ2")
@Basic(optional = false)
@NotNull
@Column(name = "PLANT_ID")
private BigDecimal plantId;
@Size(max = 45)
@Column(name = "NAME")
private String name;
@Size(max = 30)
@Column(name = "OPERATOR")
private String operator;
@Column(name = "COMMISSIONING")
@Temporal(TemporalType.TIMESTAMP)
private Date commissioning;
@Basic(optional = false)
@NotNull
@Column(name = "NOMINAL_POWER")
private double nominalPower;
@Column(name = "CONTADOR")
private BigInteger contador;
@Column(name = "LONGITUDE")
private BigDecimal longitude;
@Column(name = "LATITUDE")
private BigDecimal latitude;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "plantId", fetch = FetchType.LAZY)
private Collection<Sensor> sensorCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "plant", fetch = FetchType.LAZY)
private Collection<Userplant> userplantCollection;
@JoinColumn(name = "REPORT_ID", referencedColumnName = "REPORT_ID")
@ManyToOne( fetch = FetchType.LAZY)
private Report reportId;
@JoinColumn(name = "INSTALLATION_ID", referencedColumnName = "INSTALLATION_ID")
@ManyToOne(optional = false, fetch = FetchType.LAZY)
private Installation installationId;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "plantId", fetch = FetchType.LAZY)
private Collection<Gdu> gduCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "plantId", fetch = FetchType.LAZY)
private Collection<Inverter> inverterCollection;
public Plant() {
}
public Plant(BigDecimal plantId) {
this.plantId = plantId;
}
public Plant(BigDecimal plantId, double nominalPower) {
this.plantId = plantId;
this.nominalPower = nominalPower;
}
}
答案 0 :(得分：1)
您正在使用Plant和GduType上的延迟加载的OneToMany和ManyToOne映射。这需要对POJO（Weaving）进行字节码更改。
EclipseLink使用编织来增强JPA实体和Plain Old Java Object（POJO）类，例如延迟加载，更改跟踪，获取组和内部优化。
EclipseLink使用编织为POJO类启用以下内容：
要解决此警告，您有两个选项：
参考：EclipseLink