从选择中获取时出现 jOOQ 和 StackOverflowException答案

【问题标题】：jOOQ and StackOverflowException while fetching from a select从选择中获取时出现 jOOQ 和 StackOverflowException
【发布时间】：2017-02-05 17:29:03
【问题描述】：

我使用 jOOQ 3.8.4 和 Postgres 9.5。我有一个复杂的架构。实际上，当我做一个简单的选择时，比如：

create.selectFrom(ARTICLE_VIEW)
            .orderBy(ARTICLE_VIEW.AV_CREATION_DATE
                    .desc()).limit(4).fetch();

我明白了：

java.lang.StackOverflowError
    org.jooq.Converters$1.<init>(Converters.java:67)
    org.jooq.Converters.identity(Converters.java:67)
    org.jooq.impl.DefaultBinding.pgFromString(DefaultBinding.java:2041)
    org.jooq.impl.DefaultBinding.pgFromString(DefaultBinding.java:2130)
    org.jooq.impl.DefaultBinding.pgFromString(DefaultBinding.java:2041)
    org.jooq.impl.DefaultBinding.pgFromString(DefaultBinding.java:2130)
    org.jooq.impl.DefaultBinding.pgFromString(DefaultBinding.java:2041)

还有更多（有趣的是，这是我的第一个StackOverflowException）！

我激活了 DEBUG 日志记录模式，我复制了选择并在 PGAdmin 中执行它。有用。 jOOQ应该有问题，但我不知道如何提供有用的信息。发布我使用的模式会很疯狂，它需要几十个表。关于如何进行的任何提示？

更新

下面是记录类

/**
 * This class is generated by jOOQ
 */
package com.model.jooq.shop.tables.records;


import com.google.gson.JsonElement;

import com.model.jooq.shop.enums.BrandCountry;
import com.model.jooq.shop.enums.Color;
import com.model.jooq.shop.enums.Discount;
import com.model.jooq.shop.enums.Season;
import com.model.jooq.shop.tables.ArticleView;
import com.model.jooq.shop.udt.records.ArticleSimpleTypeRecord;
import com.model.jooq.shop.udt.records.CategoryTypeRecord;
import com.model.jooq.shop.udt.records.LocalizedMoneyRecord;
import com.model.jooq.shop.udt.records.SameModelArticleTypeRecord;

import java.io.Serializable;
import java.sql.Timestamp;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Table;
import javax.validation.constraints.Size;

import org.jooq.impl.TableRecordImpl;


/**
 * This class is generated by jOOQ.
 */
@SuppressWarnings({ "all", "unchecked", "rawtypes" })
@Entity
@Table(name = "article_view", schema = "shop")
public class ArticleViewRecord extends TableRecordImpl<ArticleViewRecord> implements Serializable, Cloneable {

    private static final long serialVersionUID = -1404712730;

    /**
     * Setter for <code>shop.article_view.av_article_id</code>.
     */
    public ArticleViewRecord setArticleId(Long value) {
        set(0, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_id</code>.
     */
    @Column(name = "av_article_id", precision = 64)
    public Long getArticleId() {
        return (Long) get(0);
    }

    /**
     * Setter for <code>shop.article_view.av_article_model_id</code>.
     */
    public ArticleViewRecord setArticleModelId(Long value) {
        set(1, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_model_id</code>.
     */
    @Column(name = "av_article_model_id", precision = 64)
    public Long getArticleModelId() {
        return (Long) get(1);
    }

    /**
     * Setter for <code>shop.article_view.av_article_name</code>.
     */
    public ArticleViewRecord setArticleName(String value) {
        set(2, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_name</code>.
     */
    @Column(name = "av_article_name", length = 25)
    @Size(max = 25)
    public String getArticleName() {
        return (String) get(2);
    }

    /**
     * Setter for <code>shop.article_view.av_article_name_for_url</code>.
     */
    public ArticleViewRecord setArticleNameForUrl(String value) {
        set(3, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_name_for_url</code>.
     */
    @Column(name = "av_article_name_for_url", length = 25)
    @Size(max = 25)
    public String getArticleNameForUrl() {
        return (String) get(3);
    }

    /**
     * Setter for <code>shop.article_view.av_article_season</code>.
     */
    public ArticleViewRecord setArticleSeason(Season value) {
        set(4, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_season</code>.
     */
    @Column(name = "av_article_season")
    public Season getArticleSeason() {
        return (Season) get(4);
    }

    /**
     * Setter for <code>shop.article_view.av_article_year</code>.
     */
    public ArticleViewRecord setArticleYear(Short value) {
        set(5, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_year</code>.
     */
    @Column(name = "av_article_year", precision = 16)
    public Short getArticleYear() {
        return (Short) get(5);
    }

    /**
     * Setter for <code>shop.article_view.av_article_standard_size_designation</code>.
     */
    public ArticleViewRecord setArticleStandardSizeDesignation(Boolean value) {
        set(6, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_standard_size_designation</code>.
     */
    @Column(name = "av_article_standard_size_designation")
    public Boolean getArticleStandardSizeDesignation() {
        return (Boolean) get(6);
    }

    /**
     * Setter for <code>shop.article_view.av_article_ean13</code>.
     */
    public ArticleViewRecord setArticleEan13(String value) {
        set(7, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_ean13</code>.
     */
    @Column(name = "av_article_ean13", length = 13)
    @Size(max = 13)
    public String getArticleEan13() {
        return (String) get(7);
    }

    /**
     * Setter for <code>shop.article_view.av_article_config_sku</code>.
     */
    public ArticleViewRecord setArticleConfigSku(String value) {
        set(8, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_config_sku</code>.
     */
    @Column(name = "av_article_config_sku", length = 12)
    @Size(max = 12)
    public String getArticleConfigSku() {
        return (String) get(8);
    }

    /**
     * Setter for <code>shop.article_view.av_article_features</code>.
     */
    public ArticleViewRecord setArticleFeatures(JsonElement value) {
        set(9, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_features</code>.
     */
    @Column(name = "av_article_features")
    public JsonElement getArticleFeatures() {
        return (JsonElement) get(9);
    }

    /**
     * Setter for <code>shop.article_view.av_article_color</code>.
     */
    public ArticleViewRecord setArticleColor(Color value) {
        set(10, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_color</code>.
     */
    @Column(name = "av_article_color")
    public Color getArticleColor() {
        return (Color) get(10);
    }

    /**
     * Setter for <code>shop.article_view.av_article_color2</code>.
     */
    public ArticleViewRecord setArticleColor2(Color value) {
        set(11, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_color2</code>.
     */
    @Column(name = "av_article_color2")
    public Color getArticleColor2() {
        return (Color) get(11);
    }

    /**
     * Setter for <code>shop.article_view.av_article_color3</code>.
     */
    public ArticleViewRecord setArticleColor3(Color value) {
        set(12, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_color3</code>.
     */
    @Column(name = "av_article_color3")
    public Color getArticleColor3() {
        return (Color) get(12);
    }

    /**
     * Setter for <code>shop.article_view.av_article_color_detail</code>.
     */
    public ArticleViewRecord setArticleColorDetail(JsonElement value) {
        set(13, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_color_detail</code>.
     */
    @Column(name = "av_article_color_detail")
    public JsonElement getArticleColorDetail() {
        return (JsonElement) get(13);
    }

    /**
     * Setter for <code>shop.article_view.av_article_paid_price</code>.
     */
    public ArticleViewRecord setArticlePaidPrice(LocalizedMoneyRecord[] value) {
        set(14, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_paid_price</code>.
     */
    @Column(name = "av_article_paid_price")
    public LocalizedMoneyRecord[] getArticlePaidPrice() {
        return (LocalizedMoneyRecord[]) get(14);
    }

    /**
     * Setter for <code>shop.article_view.av_article_price</code>.
     */
    public ArticleViewRecord setArticlePrice(LocalizedMoneyRecord[] value) {
        set(15, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_price</code>.
     */
    @Column(name = "av_article_price")
    public LocalizedMoneyRecord[] getArticlePrice() {
        return (LocalizedMoneyRecord[]) get(15);
    }

    /**
     * Setter for <code>shop.article_view.av_article_image_filenames</code>.
     */
    public ArticleViewRecord setArticleImageFilenames(String[] value) {
        set(16, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_image_filenames</code>.
     */
    @Column(name = "av_article_image_filenames")
    public String[] getArticleImageFilenames() {
        return (String[]) get(16);
    }

    /**
     * Setter for <code>shop.article_view.av_article_active_from</code>.
     */
    public ArticleViewRecord setArticleActiveFrom(Timestamp value) {
        set(17, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_active_from</code>.
     */
    @Column(name = "av_article_active_from")
    public Timestamp getArticleActiveFrom() {
        return (Timestamp) get(17);
    }

    /**
     * Setter for <code>shop.article_view.av_article_discount</code>.
     */
    public ArticleViewRecord setArticleDiscount(Discount value) {
        set(18, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_article_discount</code>.
     */
    @Column(name = "av_article_discount")
    public Discount getArticleDiscount() {
        return (Discount) get(18);
    }

    /**
     * Setter for <code>shop.article_view.av_brand_id</code>.
     */
    public ArticleViewRecord setBrandId(Short value) {
        set(19, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_brand_id</code>.
     */
    @Column(name = "av_brand_id", precision = 16)
    public Short getBrandId() {
        return (Short) get(19);
    }

    /**
     * Setter for <code>shop.article_view.av_brand_name</code>.
     */
    public ArticleViewRecord setBrandName(String value) {
        set(20, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_brand_name</code>.
     */
    @Column(name = "av_brand_name", length = 25)
    @Size(max = 25)
    public String getBrandName() {
        return (String) get(20);
    }

    /**
     * Setter for <code>shop.article_view.av_brand_name_for_url</code>.
     */
    public ArticleViewRecord setBrandNameForUrl(String value) {
        set(21, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_brand_name_for_url</code>.
     */
    @Column(name = "av_brand_name_for_url", length = 25)
    @Size(max = 25)
    public String getBrandNameForUrl() {
        return (String) get(21);
    }

    /**
     * Setter for <code>shop.article_view.av_brand_country</code>.
     */
    public ArticleViewRecord setBrandCountry(BrandCountry value) {
        set(22, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_brand_country</code>.
     */
    @Column(name = "av_brand_country")
    public BrandCountry getBrandCountry() {
        return (BrandCountry) get(22);
    }

    /**
     * Setter for <code>shop.article_view.av_brand_logo_url</code>.
     */
    public ArticleViewRecord setBrandLogoUrl(String value) {
        set(23, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_brand_logo_url</code>.
     */
    @Column(name = "av_brand_logo_url", length = 250)
    @Size(max = 250)
    public String getBrandLogoUrl() {
        return (String) get(23);
    }

    /**
     * Setter for <code>shop.article_view.av_brand_facts</code>.
     */
    public ArticleViewRecord setBrandFacts(JsonElement value) {
        set(24, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_brand_facts</code>.
     */
    @Column(name = "av_brand_facts")
    public JsonElement getBrandFacts() {
        return (JsonElement) get(24);
    }

    /**
     * Setter for <code>shop.article_view.av_commodity_group_id</code>.
     */
    public ArticleViewRecord setCommodityGroupId(Long value) {
        set(25, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_commodity_group_id</code>.
     */
    @Column(name = "av_commodity_group_id", precision = 64)
    public Long getCommodityGroupId() {
        return (Long) get(25);
    }

    /**
     * Setter for <code>shop.article_view.av_commodity_group_name</code>.
     */
    public ArticleViewRecord setCommodityGroupName(String value) {
        set(26, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_commodity_group_name</code>.
     */
    @Column(name = "av_commodity_group_name", length = 25)
    @Size(max = 25)
    public String getCommodityGroupName() {
        return (String) get(26);
    }

    /**
     * Setter for <code>shop.article_view.av_commodity_group_name_for_url</code>.
     */
    public ArticleViewRecord setCommodityGroupNameForUrl(String value) {
        set(27, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_commodity_group_name_for_url</code>.
     */
    @Column(name = "av_commodity_group_name_for_url", length = 25)
    @Size(max = 25)
    public String getCommodityGroupNameForUrl() {
        return (String) get(27);
    }

    /**
     * Setter for <code>shop.article_view.av_categories</code>.
     */
    public ArticleViewRecord setCategories(CategoryTypeRecord[] value) {
        set(28, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_categories</code>.
     */
    @Column(name = "av_categories")
    public CategoryTypeRecord[] getCategories() {
        return (CategoryTypeRecord[]) get(28);
    }

    /**
     * Setter for <code>shop.article_view.av_sizes</code>.
     */
    public ArticleViewRecord setSizes(ArticleSimpleTypeRecord[] value) {
        set(29, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_sizes</code>.
     */
    @Column(name = "av_sizes")
    public ArticleSimpleTypeRecord[] getSizes() {
        return (ArticleSimpleTypeRecord[]) get(29);
    }

    /**
     * Setter for <code>shop.article_view.av_all_model_colors</code>.
     */
    public ArticleViewRecord setAllModelColors(SameModelArticleTypeRecord[] value) {
        set(30, value);
        return this;
    }

    /**
     * Getter for <code>shop.article_view.av_all_model_colors</code>.
     */
    @Column(name = "av_all_model_colors")
    public SameModelArticleTypeRecord[] getAllModelColors() {
        return (SameModelArticleTypeRecord[]) get(30);
    }

    // -------------------------------------------------------------------------
    // Constructors
    // -------------------------------------------------------------------------

    /**
     * Create a detached ArticleViewRecord
     */
    public ArticleViewRecord() {
        super(ArticleView.ACTIVE_ARTICLE_VIEW);
    }

    /**
     * Create a detached, initialised ArticleViewRecord
     */
    public ArticleViewRecord(Long article_id, Long article_model_id, String article_name, String article_name_for_url, Season article_season, Short article_year, Boolean article_standard_size_designation, String article_ean13, String article_config_sku, JsonElement article_features, Color article_color, Color article_color2, Color article_color3, JsonElement article_color_detail, LocalizedMoneyRecord[] article_paid_price, LocalizedMoneyRecord[] article_price, String[] article_image_filenames, Timestamp article_active_from, Discount article_discount, Short brand_id, String brand_name, String brand_name_for_url, BrandCountry brand_country, String brand_logo_url, JsonElement brand_facts, Long commodity_group_id, String commodity_group_name, String commodity_group_name_for_url, CategoryTypeRecord[] categories, ArticleSimpleTypeRecord[] sizes, SameModelArticleTypeRecord[] all_model_colors) {
        super(ArticleView.ACTIVE_ARTICLE_VIEW);

        set(0, article_id);
        set(1, article_model_id);
        set(2, article_name);
        set(3, article_name_for_url);
        set(4, article_season);
        set(5, article_year);
        set(6, article_standard_size_designation);
        set(7, article_ean13);
        set(8, article_config_sku);
        set(9, article_features);
        set(10, article_color);
        set(11, article_color2);
        set(12, article_color3);
        set(13, article_color_detail);
        set(14, article_paid_price);
        set(15, article_price);
        set(16, article_image_filenames);
        set(17, article_active_from);
        set(18, article_discount);
        set(19, brand_id);
        set(20, brand_name);
        set(21, brand_name_for_url);
        set(22, brand_country);
        set(23, brand_logo_url);
        set(24, brand_facts);
        set(25, commodity_group_id);
        set(26, commodity_group_name);
        set(27, commodity_group_name_for_url);
        set(28, categories);
        set(29, sizes);
        set(30, all_model_colors);
    }
}

问题的可能来源

我按照Andrew Rueckert 的链接进行了调试，但似乎问题出在 jOOQ 中。它不能正确处理类型内部的类型。

该视图包含一个 PostgreSQL 类型的 ArticleSimpleTypeRecord。它在内部有一个类型。在DefaultBinding 类中执行的步骤是：

使用ArticleSimpleTypeRecord 的默认转换器调用方法pgFromString。这意味着调用了以下指令：

else if (Record.class.isAssignableFrom(type)) { 返回（T）pgNewRecord（类型，空，字符串）； }

方法pgNewRecord 尝试通过调用以下方法从给定对象创建记录：

public Record operate(Record record) {
        List<String> values = PostgresUtils.toPGObject(object.toString());

        Row row = record.fieldsRow();
        for (int i = 0; i < row.size(); i++) {
            pgSetValue(record, row.field(i), values.get(i));
        }
        return record;
}

这将使用方法pgSetValue 和来自object 的值将值设置到记录中。

pgFromString

在pgFromString内部，Class<T> type = converter.toType()行返回com.google.gson.JsonElement，它没有被任何默认值绑定，所以它转到行：
```
else {
    Converter<Object, T> c = (Converter<Object, T>) converter;
    return c.from(pgFromString(c.fromType(), string));
}
```
问题来了，因为json转换器应该从pgFromString(c.fromType(), string)返回的对象开始将值转换为json，但是由于c.fromType()返回Object并且jOOQ中没有对象的默认绑定是go再次使用默认情况，一次又一次，我们有StackOverflowException。

我查看了该课程的更改，似乎当前的主人已经解决了这个问题。现在有：

    else if (type == Object.class) {
        return (T) string;
    }

然后，我必须等待下一个 jOOQ 次要版本。我希望它快点到来。

【问题讨论】：

你是如何生成你的 Record 类的？（在这里发布ArticleViewRecord 可能会有所帮助。）看起来ARTICLE_VIEW 中有一个类型试图从字符串反序列化为非标准类型，并且它陷入了无限循环。 github.com/jOOQ/jOOQ/blob/version-3.8.4/jOOQ/src/main/java/org/…
@AndrewRueckert 记录类已发布。所以，我也有同样的怀疑。景色很好，选择也很好。我知道将一些 json 替换为 PostgreSQL 类型，这应该是问题所在。我只是想知道如何调试这个。堆栈跟踪没有帮助。
我编译了 3.9.0-SNAPSHOT 版本 不幸的是它还有另一个错误：没有 StackOverflowException，但它会将内部类型的所有值设置为 null，即使它们是不是
我发现了空值的问题。 Jooq 1.3.9-SNAPSHOT 很好地返回了记录，还包括所包含类型的记录。当我做fetch().into(ArticleView.class) 时会出现问题，其中ArticleView.class 是一个pojo
要解决这个问题，您可以使用自定义的RecordMapper，它可能可以通过RecordMapperProvider 注册。这是额外的工作，但它应该工作得很好！

标签： postgresql stack-overflow jooq

【解决方案1】：

您是否为 JsonElement 注册了自定义绑定？我们也使用 Gson 类型，并且必须执行以下操作：

pom.xml（缩写）

<plugin>
    <groupId>org.jooq</groupId>
    <artifactId>jooq-codegen-maven</artifactId>
    <version>${jooq.version}</version>

    <configuration>
        <generator>
            <database>
                <forcedTypes>
                    <forcedType>
                        <name>GsonJson</name>
                        <userType>com.google.gson.JsonElement</userType>
                        <binding>com.mycompany.dao.bindings.GsonJsonBinding</binding>
                        <types>json</types>
                    </forcedType>
                </forcedTypes>
            </database>
        </generator>
    </configuration>
</plugin>

GsonJsonBinding.java

public class GsonJsonBinding extends GenericStringlikeBinding<JsonElement> {
   public GsonJsonBinding() {
       super("json", new JsonConverter());
   }
}

JsonConverter.java

public class JsonConverter implements Converter<Object, JsonElement> {
    private static final Gson gson = new Gson();

    @Override
    public JsonElement from(Object t) {
        return t == null ? null : gson.fromJson("" + t, JsonElement.class);
    }

    @Override
    public Object to(JsonElement u) {
        return u == null || u == JsonNull.INSTANCE ? null : gson.toJson(u);
    }

    @Override
    public Class<Object> fromType() {
        return Object.class;
    }

    @Override
    public Class<JsonElement> toType() {
        return JsonElement.class;
    }
}

【讨论】：