我有一个 Web 应用程序在以下环境下运行良好
- GWT 2.4.0
- RestEasy 2.3.2.Final JAX-RS 和 JAXB
- Hibernate JPA 2.0(hibernate-entitymanager + hibernate-validator)4.2.0.Final
- 本地主机上的 MySQL 5.5.22 (Ubuntu 12.04)
- VMware 2.6 tomcat 服务器
应用程序成功地使用 JAX-RS、JAXB、Jackson JSON 提供程序、Hibernate JPA 注释,所有这些都混合到同一个 DTO 中。
我正在尝试将其移植到 GAE CloudSQL。我遇到了 MySQL 访问错误。我不得不将 ORM 从 Hibernate 更改为 EclipseLink 2.3.2。
提醒:
我恭敬地请求回答者不要假设我的代码中可能存在错误,而不是解决手头的问题 - 如何将基于 Hibernate 的 JPA 移植到 EclipseLink。除非您认为我的适用于 Hibernate 的设置或代码需要更改才能与 GAE CloudSQL 一起使用。原因是,该应用程序在 Hibernate 下运行良好。
请不要提供有关如何使 Hibernate 与 GAE CloudSQL 一起工作的说明,除非它涉及 Hibernate JPA 2.0。我意识到 Internet 上有一个关于如何在没有 JPA 的情况下将 Hibernate 与 CloudSQL 结合使用的示例。
如果您有关于如何使 DataNucleus JPA 2.0 与 GAE CloudSQL 一起工作的信息,那将非常有帮助。我无法让它工作,这就是我使用 EclipseLink 的原因。
此外,MySQL 数据源用户和密码能够通过 Eclipse 数据源资源管理器或 SQL Explorer 或 SQL Squirrel Client 访问数据库。因此,用户/密码没有问题。除非您认为我需要修改 MqSQL 用户或主机设置。
我已经在 mysql.db 表中添加了一行以包含主机 localhost.localdomain。
我已经将启动/调试配置修改为 -Drdbms.url=jdbc:mysql://localhost:3306/Site?user=site&password=random&useInformationSchema=true&useUnicode=true&characterEncoding=UTF8&useServerPrepStmts=true,如 http://developers.google.com/cloud-sql/docs/developers_guide_java 中“在开发期间使用本地 MySQL 实例”中的说明.
您的解决建议必须涉及 JPA 2.0 而不是 1.0。
我不是在访问我的 CloudSQL 帐户,而是在 Ubuntu 12.04 上运行的本地主机 MySQL 数据库。我还没有尝试使用此应用程序访问我的 CloudSQL 数据库。
可能是,我的 persistence.xml 中需要更多行?可能是我的 EMF 设置需要修改?可能是,GAE 需要与 Hibernate 不同的获取 EMF 的顺序?也许,我需要禁用 DataNucleus?
请帮忙指教。非常感谢。
错误堆栈表明 java.security.AccessControlException: access denied ("java.net.SocketPermission""localhost""resolve"):
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:126)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:134)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2411)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2153)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:126)
at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:134)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:190)
at org.eclipse.persistence.sessions.DefaultConnector.connect(DefaultConnector.java:98)
... 55 more
Caused by: java.security.AccessControlException: access denied ("java.net.SocketPermission" "localhost" "resolve")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
at java.security.AccessController.checkPermission(AccessController.java:555)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:252)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1048)
at java.net.InetAddress.getAllByName0(InetAddress.java:1203)
at java.net.InetAddress.getAllByName(InetAddress.java:1127)
at java.net.InetAddress.getAllByName(InetAddress.java:1063)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:247)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:294)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2332)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2369)
持久性.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
version="1.0">
<persistence-unit name="Site" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>org.blessedgeek.site.jaxrs.dto.Node</class>
<properties>
<property name="javax.persistence.jdbc.user" value="site" />
<property name="javax.persistence.jdbc.password" value="random" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/Site" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"></property>
</properties>
</persistence-unit>
</persistence>
maven 依赖
<properties>
<resteasy.version>2.3.2.Final</resteasy.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
</dependency>
<dependency>
<groupId>com.smartgwt</groupId>
<artifactId>smartgwt</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>com.smartgwt</groupId>
<artifactId>smartgwt-skins</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>com.googlecode.mvp4g</groupId>
<artifactId>mvp4g</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.18</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>${resteasy.version}</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>${resteasy.version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson-provider</artifactId>
<version>${resteasy.version}</version>
</dependency>
</dependencies>
appengine-web.xml
<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application></application>
<version>1</version>
<threadsafe>true</threadsafe>
<!-- Configure serving/caching of GWT files -->
<static-files>
<include path="**" />
<include path="**.nocache.*" expiration="0s" />
<include path="**.cache.*" expiration="365d" />
<exclude path="**.gwt.rpc" />
</static-files>
<system-properties>
<property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
</system-properties>
<sessions-enabled>true</sessions-enabled>
<async-session-persistence enabled="true" />
</appengine-web-app>
网络.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Blessed Geek Site</display-name>
<!-- Auto scan REST service -->
<context-param>
<param-name>resteasy.scan</param-name>
<param-value>true</param-value>
</context-param>
<!-- this need same with resteasy servlet url-pattern -->
<context-param>
<param-name>resteasy.servlet.mapping.prefix</param-name>
<param-value>/site</param-value>
</context-param>
<listener>
<listener-class>
org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap
</listener-class>
</listener>
<servlet>
<servlet-name>resteasy-servlet</servlet-name>
<description>JAX-RS Tools Generated - Do not modify</description>
<servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>resteasy-servlet</servlet-name>
<url-pattern>/site/*</url-pattern>
</servlet-mapping>
</web-app>
示例 DTO 类
@Entity
@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement (name="node")
@XmlType(propOrder = { "id", "name", "description", "iconURL", "parentID", "active", "type"})
public class Node
implements Serializable{
public enum Type{
VIEW, ROOTNode, FOLDER, LEAF
}
@XmlAttribute
@Id
@GeneratedValue
private Long id;
@XmlAttribute
private String name;
@XmlAttribute
private String description;
@XmlAttribute
private String iconURL;
@XmlAttribute
private long parentID;
@XmlAttribute
private boolean active;
@XmlAttribute
@Enumerated(EnumType.STRING)
private Type type;
public Node() {
super();
}
public Node(String name, String description) {
super();
this.name = name;
this.description = description;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getIconURL() {
return iconURL;
}
public void setIconURL(String iconURL) {
this.iconURL = iconURL;
}
public long getParentID() {
return parentID;
}
public void setParentID(long parentID) {
this.parentID = parentID;
}
public boolean isActive() {
return active;
}
public void setActive(boolean active) {
this.active = active;
}
public Type getType() {
return type;
}
public void setType(Type type) {
this.type = type;
}
}
2012/05/16 更新:
我还在 persistence.xml 中将 jdbc 驱动程序替换为 com.google.appengine.api.rdbms.AppEngineDriver。仍然遇到相同的访问控制异常。
最佳答案
在 persistence.xml 中,尝试使用:
javax.persistence.jdbc.url = jdbc:google:rdbms://localhost/Site
javax.persistence.jdbc.driver = com.google.appengine.api.rdbms.AppEngineDriver
同时将 mysql jar(从 http://dev.mysql.com/downloads/connector/j/ 下载)放入 appengine-java-sdk-1.6.x/lib/impl
使用本地 MySQL 和 JDO 为我工作。
关于java - MySQL 访问被拒绝的 GAE CloudSQL,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10585140/