jOOQ + Spring：PSQLException：当前事务被中止，命令被忽略直到事务结束

Question

我正在开发一个使用 Spring 和 jOOQ 的 webapp。

考虑以下用例：

1. 我打开呈现 db 查询结果的 URL：select * from contract_ref，一切正常。

2. 我打开 URL 尝试运行触发 Postgres 错误的查询，即select * from users_ref（表 users_ref 不存在），并得到错误：

   Servlet.service() for servlet [dispatcher] in context with path [/astra] threw exception [Request processing failed; nested exception is org.springframework.jdbc.BadSqlGrammarException: jOOQ; bad SQL grammar [select * from "users_ref"]; nested exception is org.postgresql.util.PSQLException: ОШИБКА: отношение "users_ref" не существует.

3. 当我尝试从第 1 步打开页面时，我收到错误 PSQLException: current transaction is aborted, commands ignored until end of transaction block，但我看到 webapp 尝试从第 1 步执行语句。

在我看来，情况就像 Postgres 没有关闭事务，但我只做 select，所以不需要任何事务。

当我为ReferenceController.view 添加@Transactional 注释时，上述行为消失了。

完整日志：http://pastebin.com/t3UmbeCy

applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:cache="http://www.springframework.org/schema/cache"
       xmlns:bean="http://www.springframework.org/schema/mvc"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <cache:annotation-driven/>

    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />

    <context:component-scan base-package="net.kerba"/>

    <context:property-placeholder location="classpath:config.properties"/>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="localDbDataSource"/>
    </bean>

    <bean id="jacksonMessageConverter"
          class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>

    <bean:annotation-driven>
        <bean:message-converters>
            <ref bean="jacksonMessageConverter"/>
        </bean:message-converters>
    </bean:annotation-driven>


    <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
        <property name="caches">
            <set>
                <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean">
                    <property name="name" value="user-page"/>
                </bean>
            </set>
        </property>
    </bean>

    <bean id="viewResolver" class="org.springframework.web.servlet.view.tiles3.TilesViewResolver">
        <property name="requestContextAttribute" value="requestContext"/>
        <property name="viewClass" value="org.springframework.web.servlet.view.tiles3.TilesView"/>
    </bean>

    <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
                <prop key="java.lang.NullPointerException">exception</prop> <!-- map exception to view name -->
                <prop key="org.springframework.jdbc.UncategorizedSQLException">exception</prop> <!-- map exception to view name -->
            </props>
        </property>
    </bean>

    <bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles3.TilesConfigurer">
        <property name="definitions">
            <list>
                <value>/WEB-INF/tiles/tiles-common.xml</value>
                <value>/WEB-INF/tiles/tiles-admin.xml</value>
                <value>/WEB-INF/tiles/tiles-requests.xml</value>
            </list>
        </property>
        <property name="preparerFactoryClass"
                  value="org.springframework.web.servlet.view.tiles3.SpringBeanPreparerFactory"/>
    </bean>

    <bean id="liquibase" class="liquibase.integration.spring.SpringLiquibase">
        <property name="dropFirst" value="true"/>
        <property name="dataSource" ref="localDbDataSource"/>
        <property name="changeLog" value="classpath:db.astra.index.xml"/>
    </bean>

    <bean id="localDbDataSource"
          class="org.apache.tomcat.jdbc.pool.DataSource">
        <property name="driverClassName" value="${db.driverClassName}"/>
        <property name="url" value="${db.url}"/>
        <property name="username" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
        <property name="maxIdle" value="${db.maxIdle}"/>
        <property name="minIdle" value="${db.minIdle}"/>
        <property name="maxActive" value="${db.maxActive}"/>
        <property name="timeBetweenEvictionRunsMillis" value="${db.timeBetweenEvictionRunsMillis}"/>
        <property name="minEvictableIdleTimeMillis" value="${db.minEvictableIdleTimeMillis}"/>
        <property name="testWhileIdle" value="${db.testWhileIdle}"/>
        <property name="validationQuery" value="${db.validationQuery}"/>
        <property name="removeAbandoned" value="${db.removeAbandoned}"/>
        <property name="logAbandoned" value="${db.logAbandoned}"/>
        <property name="initialSize" value="${db.initialSize}"/>
        <property name="defaultAutoCommit" value="false" />
    </bean>

    <bean id="transactionAwareDataSource"
          class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">
        <constructor-arg ref="localDbDataSource"/>
    </bean>

    <bean class="org.jooq.impl.DataSourceConnectionProvider" name="connectionProvider">
        <constructor-arg ref="transactionAwareDataSource"/>
    </bean>

    <bean id="exceptionTranslator"
          class="net.kerba.astra.exception.SpringExceptionTranslator"/>

    <bean class="org.jooq.impl.DefaultConfiguration" name="jooqConfig">
        <constructor-arg index="0" ref="connectionProvider"/>
        <constructor-arg index="1">
            <null/>
        </constructor-arg>
        <constructor-arg index="2">
            <null/>
        </constructor-arg>
        <constructor-arg index="3">
            <list>
                <bean class="org.jooq.impl.DefaultExecuteListenerProvider">
                    <constructor-arg index="0" ref="exceptionTranslator"/>
                </bean>
            </list>
        </constructor-arg>
        <constructor-arg index="4">
            <null/>
        </constructor-arg>
        <constructor-arg index="5">
            <value type="org.jooq.SQLDialect">POSTGRES</value>
        </constructor-arg>
        <constructor-arg index="6">
            <null/>
        </constructor-arg>
        <constructor-arg index="7">
            <null/>
        </constructor-arg>
    </bean>

    <bean id="dsl" class="org.jooq.impl.DefaultDSLContext">
        <constructor-arg ref="jooqConfig"/>
    </bean>

    <bean id="patientDao" class="net.kerba.astra.jooq.tables.daos.PatientDao">
        <property name="configuration" ref="jooqConfig" />
    </bean>

    <bean id="patientStatusDao" class="net.kerba.astra.jooq.tables.daos.PatientStatusRefDao">
        <property name="configuration" ref="jooqConfig" />
    </bean>

    <bean id="requestUrgencyRefDao" class="net.kerba.astra.jooq.tables.daos.RequestUrgencyRefDao">
        <property name="configuration" ref="jooqConfig" />
    </bean>

    <bean id="divisionRefDao" class="net.kerba.astra.jooq.tables.daos.DivisionRefDao">
        <property name="configuration" ref="jooqConfig" />
    </bean>

    <bean id="requestStateRefDao" class="net.kerba.astra.jooq.tables.daos.RequestStateRefDao">
        <property name="configuration" ref="jooqConfig" />
    </bean>
</beans>

参考控制器：

package net.kerba.astra.controller;

@Controller
@RequestMapping("references")
public class ReferencesController {

    private static final Logger logger = LoggerFactory.getLogger(ReferencesController.class);

    @Autowired
    private ReferenceService referenceService;

    @Autowired
    private DSLContext dsl;

    private static final Map<String,Object> REFERENCES_CONFIG = loadReferencesList();

    private static Map<String,Object> loadReferencesList() {
        final InputStream resourceAsStream = ReferencesController.class.getResourceAsStream("ReferencesController.data.json");
        Objects.requireNonNull(resourceAsStream, "resourceAsStream must not be null");

        final InputStreamReader json;

        try {
            json = new InputStreamReader(resourceAsStream, "utf8");
            Objects.requireNonNull(json, "json must not be null");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("Encoding not supported: utf8", e);
        }

        final Map map = new Gson().fromJson(json, Map.class);
        Objects.requireNonNull(map, "map must not be null");

        SortedMap<String,Object> sortedMap = new TreeMap(new Comparator() {
            @Override
            public int compare(Object o1, Object o2) {
                String key1 = (String) o1;
                String key2 = (String) o2;

                if (key1 != null && key2 != null) {
                    return key1.compareTo(key2);
                } else {
                    return 0;
                }
            }
        });
        sortedMap.putAll(map);

        return sortedMap;
    }

    /**
     * Индексная страница справочников
     * @param model
     * @return
     */
    @RequestMapping(value = "", method = RequestMethod.GET)
    public String index(Model model) {
        model.addAttribute("referencesConfig", REFERENCES_CONFIG);
        model.addAttribute("pageTitle", "Справочники");
        return "references.index";
    }


    @RequestMapping(value = "view/{referenceName}", method = RequestMethod.GET)
    public String view(Model model,@PathVariable("referenceName") String referenceName) {
        model.addAttribute("referencesConfig", REFERENCES_CONFIG);

        if (!REFERENCES_CONFIG.containsKey(referenceName)) {
            model.addAttribute("pageTitle", "Справочник не найден");
            model.addAttribute("message", "Справочник не найден!");
            return "error";
        } else {
            final Map currentRef = (Map) REFERENCES_CONFIG.get(referenceName);
            model.addAttribute("pageTitle", "Справочник: «" + currentRef.get("name") + "»");
            model.addAttribute("selectedReferenceConfig", currentRef);
            model.addAttribute("selectedReferenceConfigKey", referenceName);

            SelectQuery selectQuery = dsl.selectQuery();
            final String tableName = currentRef.get("tableName").toString();
            Objects.requireNonNull(tableName, "tableName must not be null");
            selectQuery.addFrom(DSL.tableByName(tableName));
            final Result result = selectQuery.fetch();

            logger.info("result: {}", result.intoMaps());
            model.addAttribute("referenceData", result.intoMaps());
            return "references.index";
        }
    }
}

Answer 1

事务Postgres总是存在。有多种选项可以控制它们，例如 显式事务（BEGIN-END 纯 SQL 中的块）与 隐式事务，它们没有被声明但被暗示。

还有 autocommit，在每条语句之后自动为您结束事务 - 即 COMMIT 如果成功，ROLLBACK 如果不成功。但是，这不允许在同一事务下使用多个单独的命令，这通常是可取的。

jOOQ 根本不管理事务，并遵循现有的方法来管理它们（Spring TransactionAwareDataSourceProxy 在您的情况下）。添加@Transactional 为Spring 定义事务的属性（您可以执行设置隔离级别 等操作）。

因此，如果您使用该注释获得预期的行为，我认为这很好并且可以预期，因为正如我上面提到的，Postgres 始终是事务性的。如果没有该注释，Spring 不会将与 Postgres 的交互视为事务性的，即使在 Postgres 级别也是如此，因此您会得到诸如尝试之类的行为对中止的事务进行额外查询，导致异常。