我想在我的Web应用程序java启动时启动Derby网络服务器.. 所以我尝试用NetworkServerControl实现一个javax.servelet.ServletContextListener：
public class ReqListener implements ServletContextListener {
static final Logger log = LoggerFactory.getLogger(ReqListener.class);
PrintWriter pw = new PrintWriter(System.out);
private NetworkServerControl derbyserver;
@Override
public void contextDestroyed(ServletContextEvent arg0) {
try {
String userHomeDir = System.getProperty("user.home", ".");
String systemDir = userHomeDir + "/.rubrica";
// Set the db system directory.
System.setProperty("derby.system.home", systemDir);
derbyserver = new NetworkServerControl(InetAddress.getByName("localhost"), 1527);
derbyserver.start(pw);
log.info("Apache derby settings ok");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
log.error(e.getMessage());
}
}
@Override
public void contextInitialized(ServletContextEvent arg0) {
if (derbyserver!=null){
try {
log.info("Apache derby db server stopping..");
derbyserver.shutdown();
} catch (Exception e) {
log.error(e.getMessage());
e.printStackTrace();
}
}
}
derby的pom依赖项列表：
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.12.1.1</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbytools</artifactId>
<version>10.12.1.1</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbyclient</artifactId>
<version>10.12.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derbynet</artifactId>
<version>10.12.1.1</version>
</dependency>
但是当Tomcat执行代码时，tomcat会给出以下例外情况：
INFORMAZIONI: Stopping service Catalina
Sun Oct 23 11:02:34 CEST 2016 : Server di rete Apache Derby: 10.12.1.1 - (1704137) avviato e pronto ad accettare connessioni sulla porta 1527
23/10/2016 11:02:34.505 INFO [localhost-startStop-2] ReqListener: Apache derby settings ok
ott 23, 2016 11:02:34 AM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc
AVVERTENZA: The web application [rubrica] registered the JDBC driver [org.apache.derby.jdbc.AutoloadedDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
ott 23, 2016 11:02:34 AM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
AVVERTENZA: The web application [rubrica] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
java.util.TimerThread.mainLoop(Timer.java:526)
java.util.TimerThread.run(Timer.java:505)
ott 23, 2016 11:02:34 AM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
AVVERTENZA: The web application [rubrica] appears to have started a thread named [derby.NetworkServerStarter] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.util.zip.Inflater.inflateBytes(Native Method)
java.util.zip.Inflater.inflate(Inflater.java:259)
java.util.zip.InflaterInputStream.read(InflaterInputStream.java:152)
org.apache.catalina.webresources.AbstractArchiveResource$JarInputStreamWrapper.read(AbstractArchiveResource.java:255)
org.apache.catalina.webresources.AbstractArchiveResource.getContent(AbstractArchiveResource.java:180)
org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2488)
org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:859)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1302)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
org.apache.derby.impl.drda.NetworkServerControlImpl$2.run(Unknown Source)
org.apache.derby.impl.drda.NetworkServerControlImpl$2.run(Unknown Source)
java.security.AccessController.doPrivileged(Native Method)
org.apache.derby.impl.drda.NetworkServerControlImpl.blockingStart(Unknown Source)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.apache.derby.iapi.jdbc.DRDAServerStarter.run(Unknown Source)
java.lang.Thread.run(Thread.java:745)
ott 23, 2016 11:02:34 AM org.apache.coyote.AbstractProtocol stop
INFORMAZIONI: Stopping ProtocolHandler ["http-nio-8080"]
我正在使用JPA和Hibernate，但是服务器Tomcat立即停止，因此我无法查找我的jpa测试页。
会发生什么？怎么了？
谢谢
拉吉