我有一個java
應用程序,如果記錄超過一年,我試圖標記一個人實體(對應於我的db中的PERSON行)。即將DB中的OBSOLETE行設置爲「Y」。在Java應用程序中正確設置新的數據庫連接?
我得到的錯誤:
SQL Error: 2396, SQLState: 61000
ERROR o.h.e.jdbc.spi.SqlExceptionHelper - ORA-02396: exceeded maximum idle time, please connect again
WARN o.h.e.jdbc.spi.SqlExceptionHelper - SQL Error: 17008, SQLState: 99999
ERROR o.h.e.jdbc.spi.SqlExceptionHelper - Closed Connection
這是因爲我的DB idle timeout
設定爲30分鐘,應用程序正在運行的比這更長的時間。
要嘗試解決這個問題,我正在爲每個將被標記的Person啓動和關閉新連接,但是錯誤仍在發生。 我該如何解決這個問題?
方法:
public void flagPersonIfDeletable() {
List<String> allPersonIds = getAllPersonIds();
for (String personId : allPersonIds) {
try {
startNewConnection();
flagPersonById(personId)
} finally {
closeConnection();
}
}
開始新的連接方法:
public void startNewConnection() {
this.Persistence.done();
this.Persistence.unbind();
this.Persistence.entityManager();
}
關閉連接方法:
public void closeConnection() {
if (entityManager() != null &&
entityManager().isOpen()) {
if (entityManager().getTransaction().isActive()) {
entityManager().getTransaction().commit();
}
entityManager().close();
}
}
我的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_2_0.xsd"
version="2.0">
<persistence-unit name="myPersistence">
<class>com.my.package.PersonEntity</class>
<properties>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>
<property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy"/>
<property name="hibernate.connection.provider_class" value="org.hibernate.c3p0.internal.C3P0ConnectionProvider"/>
<property name="hibernate.c3p0.max_size" value="1"/>
<property name="hibernate.c3p0.min_size" value="1"/>
<property name="hibernate.c3p0.acquire_increment" value="1"/>
<property name="hibernate.c3p0.idle_test_period" value="300"/>
<property name="hibernate.c3p0.max_statements" value="0"/>
<property name="hibernate.c3p0.timeout" value="0"/>
<property name="hibernate.c3p0.unreturnedConnectionTimeout" value="30000"/>
<property name="hibernate.c3p0.dataSourceName" value="JPA"/>
</properties>
</persistence-unit>
</persistence>