未调用 Eclipselink 持久性转换器

Question

我想创建一个 org.eclipse.persistence.mappings.converters.Converter 来将 POJO 转换为 JSON。我这样做是为了将它存储在 Postgres jsonb 字段中。这适用于 Spring Boot 1.5.14。新项目在 Spring Boot 2.0.2 上，代码不再有效。不再调用转换器，这会导致数据库出现类型错误。

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.eclipse.persistence.mappings.DatabaseMapping;
import org.eclipse.persistence.sessions.Session;
import org.postgresql.util.PGobject;

import java.io.IOException;
import java.sql.SQLException;

public class MetadataConverter implements org.eclipse.persistence.mappings.converters.Converter {
    private ObjectMapper mapper = new ObjectMapper();

    @Override
    public Object convertObjectValueToDataValue(Object o, Session session) {
        try {
            PGobject out = new PGobject();
            out.setType("jsonb");
            out.setValue(mapper.writeValueAsString(o));
            return out;
        } catch (SQLException e) {
            throw new IllegalArgumentException("Unable to serialize to json field ", e);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
            throw new IllegalArgumentException("Unable to serialize to json field ", e);
        }

    }

    @Override
    public Metadata convertDataValueToObjectValue(Object o, Session session) {
        if (o == null) {
            return null;
        }

        try {
            if (o instanceof PGobject) {
                return mapper.readValue(((PGobject) o).getValue(), new TypeReference<Metadata>(){});
            } else {
                return mapper.readValue((String) o, new TypeReference<Metadata>(){});
            }

        } catch (IOException | ClassCastException e) { 
            throw new IllegalArgumentException("Unable to deserialize to json field ");
        }
    }

    @Override
    public boolean isMutable() {
        return false;
    }

    @Override
    public void initialize(DatabaseMapping databaseMapping, Session session) {
    }
}

这是模型：

...

@Data
@Entity
@JsonIgnoreProperties(ignoreUnknown = true)
@Table(name = "MY_TEST")
public class TestModel implements Serializable{

    @Id
    String id;

    @Column(columnDefinition = "jsonb")
    @Converter(converterClass = MetadataConverter.class, name = "metadataJsonConverter")
    @org.eclipse.persistence.annotations.Convert("metadataJsonConverter")
    Metadata metadata;
}

两个项目的eclipslink版本都是2.6.3，Postgres版本在旧项目9.4.1212.jre7（已经计划更新）和新项目42.2.2

有人知道发生了什么变化吗？

此致

卢卡斯

Answer 1

JpaConfiguration 不正确，扩展 JpaBaseConfiguration 解决了问题：

@Configuration
public class JpaConfiguration extends JpaBaseConfiguration {
    protected JpaConfiguration(DataSource dataSource, JpaProperties properties,
                               ObjectProvider<JtaTransactionManager> jtaTransactionManagerProvider,
                               ObjectProvider<TransactionManagerCustomizers> transactionManagerCustomizers) {
        super(dataSource, properties, jtaTransactionManagerProvider, transactionManagerCustomizers);
    }

    @Override
    protected AbstractJpaVendorAdapter createJpaVendorAdapter() {
        return new EclipseLinkJpaVendorAdapter();
    }

    @Override
    protected Map<String, Object> getVendorProperties() {
        final HashMap<String, Object> map = new HashMap<>();
        map.put(PersistenceUnitProperties.WEAVING, detectWeavingMode());
        map.put(PersistenceUnitProperties.VALIDATION_MODE, ValidationMode.NONE.toString());
        return map;
    }

    private String detectWeavingMode() {
        return InstrumentationLoadTimeWeaver.isInstrumentationAvailable() ? "true" : "static";
    }
}

未调用 Eclipselink 持久性转换器

Eclipslink persitence converter not called

java

eclipselink

spring-boot