JPA + SQLite проблема - PullRequest
Новая
       12

JPA + SQLite проблема

0 голосов
/ 25 мая 2009

Я настраиваю JPA для работы с базой данных SQLite, с hibernate в качестве поставщика. Я сопоставляю одно pojo с таблицей, без фк, пока просто. Я использую SQLDialect, найденный в Интернете. Я получаю эту трассировку стека при попытке инициализировать свое приложение: 

java.sql.SQLException: SQLite supports only TRANSACTION_SERIALIZABLE
    at org.sqlite.Conn.setTransactionIsolation(Conn.java:131)
    at com.mchange.v2.c3p0.impl.NewProxyConnection.setTransactionIsolation(NewProxyConnection.java:701)
    at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:58)
    at org.hibernate.tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.prepare(SuppliedConnectionProviderConnectionHelper.java:27)
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:127)
    at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:314)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1300)
    at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:730)
    at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
    at hr.loggingserver.listeners.ApplicationListener.contextInitialized(ApplicationListener.java:27)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
    at org.apache.catalina.core.StandardService.start(StandardService.java:516)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)

вот мой файл persistence.xml: 

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
    version="1.0">
    <persistence-unit name="loggingServerDB" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>

        <class>hr.loggingserver.model.Type</class>
        <class>hr.loggingserver.model.LogSpec</class>

        <properties>
            <property name="hibernate.bytecode.use_reflection_optimizer" value="true"/>
            <property name="hibernate.default_batch_fetch_size" value="100"/>
            <property name="hibernate.cache.use_second_level_cache" value="true"/>
<!--        <property name="hibernate.cache.use_query_cache" value="true"/>     -->
            <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.EhCacheProvider"/>

            <property name="hibernate.archive.autodetection" value="class, hbm"/>
            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.format_sql" value="true"/>
            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.dialect" value="hr.loggingserver.model.dao.dialect.SQLiteDialect"/>
            <!--  Set isolation level to repeatable_read (read_commited je 2) -->
            <property name="hibernate.connection.isolation" value="4"/>
            <property name="hibernate.connection.release_mode" value="after_transaction"/>

            <property name="hibernate.connection.driver_class" value="org.sqlite.JDBC"/>
            <property name="hibernate.connection.url" value="jdbc:sqlite:C:\work1\logging-server2\db1"/>
            <!--<property name="hibernate.connection.username" value="labosi"/>
            <property name="hibernate.connection.password" value="s%aHb31J7"/>-->
            <property name="hibernate.c3p0.min_size" value="5"/>
            <property name="hibernate.c3p0.max_size" value="50"/>
            <property name="hibernate.c3p0.timeout" value="300"/>
            <property name="hibernate.c3p0.max_statements" value="50"/>
            <property name="hibernate.c3p0.idle_test_period" value="600"/>

        </properties>
    </persistence-unit>
</persistence>

Вот класс SQLDialect, который я использую: 

package hr.loggingserver.model.dao.dialect;
/*
 * The author disclaims copyright to this source code. In place of
 * a legal notice, here is a blessing:
 * 
 * May you do good and not evil.
 * May you find forgiveness for yourself and forgive others.
 * May you share freely, never taking more than you give.
 *
 */
import java.sql.Types;

import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.Hibernate;

public class SQLiteDialect extends Dialect {
    public SQLiteDialect() {
        super();
        registerColumnType(Types.BIT, "integer");
        registerColumnType(Types.TINYINT, "tinyint");
        registerColumnType(Types.SMALLINT, "smallint");
        registerColumnType(Types.INTEGER, "integer");
        registerColumnType(Types.BIGINT, "bigint");
        registerColumnType(Types.FLOAT, "float");
        registerColumnType(Types.REAL, "real");
        registerColumnType(Types.DOUBLE, "double");
        registerColumnType(Types.NUMERIC, "numeric");
        registerColumnType(Types.DECIMAL, "decimal");
        registerColumnType(Types.CHAR, "char");
        registerColumnType(Types.VARCHAR, "varchar");
        registerColumnType(Types.LONGVARCHAR, "longvarchar");
        registerColumnType(Types.DATE, "date");
        registerColumnType(Types.TIME, "time");
        registerColumnType(Types.TIMESTAMP, "timestamp");
        registerColumnType(Types.BINARY, "blob");
        registerColumnType(Types.VARBINARY, "blob");
        registerColumnType(Types.LONGVARBINARY, "blob");
        // registerColumnType(Types.NULL, "null");
        registerColumnType(Types.BLOB, "blob");
        registerColumnType(Types.CLOB, "clob");
        registerColumnType(Types.BOOLEAN, "integer");

        registerFunction("concat", new VarArgsSQLFunction(Hibernate.STRING, "",
                "||", ""));
        registerFunction("mod", new SQLFunctionTemplate(Hibernate.INTEGER,
                "?1 % ?2"));
        registerFunction("substr", new StandardSQLFunction("substr",
                Hibernate.STRING));
        registerFunction("substring", new StandardSQLFunction("substr",
                Hibernate.STRING));
    }

    public boolean supportsIdentityColumns() {
        return true;
    }

    /*
     public boolean supportsInsertSelectIdentity() {
     return true; // As specify in NHibernate dialect
     }
     */

    public boolean hasDataTypeInIdentityColumn() {
        return false; // As specify in NHibernate dialect
    }

    /*
     public String appendIdentitySelectToInsert(String insertString) {
     return new StringBuffer(insertString.length()+30). // As specify in NHibernate dialect
     append(insertString).
     append("; ").append(getIdentitySelectString()).
     toString();
     }
     */

    public String getIdentityColumnString() {
        // return "integer primary key autoincrement";
        return "integer";
    }

    public String getIdentitySelectString() {
        return "select last_insert_rowid()";
    }

    public boolean supportsLimit() {
        return true;
    }

    public String getLimitString(String query, boolean hasOffset) {
        return new StringBuffer(query.length() + 20).append(query).append(
                hasOffset ? " limit ? offset ?" : " limit ?").toString();
    }

    public boolean supportsTemporaryTables() {
        return true;
    }

    public String getCreateTemporaryTableString() {
        return "create temporary table if not exists";
    }

    public boolean dropTemporaryTableAfterUse() {
        return false;
    }

    public boolean supportsCurrentTimestampSelection() {
        return true;
    }

    public boolean isCurrentTimestampSelectStringCallable() {
        return false;
    }

    public String getCurrentTimestampSelectString() {
        return "select current_timestamp";
    }

    public boolean supportsUnionAll() {
        return true;
    }

    public boolean hasAlterTable() {
        return false; // As specify in NHibernate dialect
    }

    public boolean dropConstraints() {
        return false;
    }

    public String getAddColumnString() {
        return "add column";
    }

    public String getForUpdateString() {
        return "";
    }

    public boolean supportsOuterJoinForUpdate() {
        return false;
    }

    public String getDropForeignKeyString() {
        throw new UnsupportedOperationException(
                "No drop foreign key syntax supported by SQLiteDialect");
    }

    public String getAddForeignKeyConstraintString(String constraintName,
            String[] foreignKey, String referencedTable, String[] primaryKey,
            boolean referencesPrimaryKey) {
        throw new UnsupportedOperationException(
                "No add foreign key syntax supported by SQLiteDialect");
    }

    public String getAddPrimaryKeyConstraintString(String constraintName) {
        throw new UnsupportedOperationException(
                "No add primary key syntax supported by SQLiteDialect");
    }

    public boolean supportsIfExistsBeforeTableName() {
        return true;
    }

    public boolean supportsCascadeDelete() {
        return false;
    }
}

Кто-нибудь знает, что я делаю не так? Спасибо.

1 Ответ

4 голосов
/ 25 мая 2009

Причиной исключения SQLException является то, что используемый драйвер SQLite JDBC не поддерживает указанный уровень изоляции транзакции.

В вашем файле persistance.xml hibernate.connection.isolation имеет значение 4 (TRANSACTION_REPEATABLE_READ). Исключение SQLE говорит о том, что драйвер поддерживает только TRANSACTION_SERIALIZABLE. Это будет эквивалентно установке hibernate.connection.isolation в 8. Вам нужно будет изменить это значение, чтобы использовать драйвер.

Добро пожаловать на сайт PullRequest, где вы можете задавать вопросы и получать ответы от других членов сообщества.

Нет похожих вопросов

...