Java Google AppEngine上的FacebookXmlRestClient NotSerializableException
我试着效仿这个例子，但当我 我试图保存到会话的客户端对象。该代码被托管在谷歌appengine平台上Java Google AppEngine上的FacebookXmlRestClient NotSerializableException,java,google-app-engine,facebook,facebook-java-api,Java,Google App Engine,Facebook,Facebook Java Api,我试着效仿这个例子，但当我 我试图保存到会话的客户端对象。该代码被托管在谷歌appengine平台上 java.lang.RuntimeException: java.io.NotSerializableException: com.google.code.facebookapi.FacebookXmlRestClient at com.google.apphosting.runtime.jetty.SessionManager.serialize(SessionManager.java
java.lang.RuntimeException: java.io.NotSerializableException: com.google.code.facebookapi.FacebookXmlRestClient
at com.google.apphosting.runtime.jetty.SessionManager.serialize(SessionManager.java:387)
at com.google.apphosting.runtime.jetty.SessionManager.createEntityForSession(SessionManager.java:364)
at com.google.apphosting.runtime.jetty.SessionManager$AppEngineSession.save(SessionManager.java:164)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:41)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
.....
at com.google.net.async.Connection.handleReadEvent(Connection.java:474)
at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:831)
at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207)
at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103)
at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251)
at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:418)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.io.NotSerializableException: com.google.code.facebookapi.FacebookXmlRestClient
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1173)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:343)
at java.util.HashMap.writeObject(HashMap.java:1018)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
import com.google.code.facebookapi.FacebookException;
import com.google.code.facebookapi.FacebookWebappHelper;
import com.google.code.facebookapi.FacebookXmlRestClient;
import com.google.code.facebookapi.IFacebookRestClient;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Logger;
import org.w3c.dom.Document;
public class FacebookFilter implements Filter {
private static final Logger logger = Logger.getLogger(FacebookFilter.class.getName());
private String api_key;
private String secret;
private static Map map = new HashMap();
public void init(FilterConfig filterConfig) throws ServletException {
api_key = filterConfig.getInitParameter("facebook_api_key");
secret = filterConfig.getInitParameter("facebook_secret_key");
if(api_key == null || secret == null) {
throw new ServletException("Cannot initialise Facebook User Filter because the " +
"facebook_api_key or facebook_secret context init " +
"params have not been set. Check that they're there " +
"in your servlet context descriptor.");
} else {
logger.info("Using facebook API key: " + api_key);
}
}
public void destroy() {
}
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
try {
HttpServletRequest request = (HttpServletRequest)req;
HttpServletResponse response = (HttpServletResponse)res;
HttpSession session = request.getSession(true);
IFacebookRestClient<Document> userClient = getUserClient(session);
if(userClient == null) {
logger.info("User session doesn't have a Facebook API client setup yet. Creating one and storing it in the user's session.");
userClient = new FacebookXmlRestClient(api_key, secret);
logger.info("add new session to map "+map.size()+" "+session.getId()+" "+userClient.toString());
map.put(session,userClient);
}
logger.fine("Creating a FacebookWebappHelper, which copies fb_ request param data into the userClient");
FacebookWebappHelper<Document> facebook = new FacebookWebappHelper<Document>(request, response, api_key, secret, userClient);
String nextPage = request.getRequestURI();
nextPage = nextPage.substring(nextPage.indexOf("/", 1) + 1); //cut out the first /, the context path and the 2nd /
logger.fine(nextPage);
boolean redirectOccurred = facebook.requireLogin(nextPage);
if(redirectOccurred) {
return;
}
redirectOccurred = facebook.requireFrame(nextPage);
if(redirectOccurred) {
return;
}
long facebookUserID;
try {
facebookUserID = userClient.users_getLoggedInUser();
logger.info("facebookUserID "+facebookUserID+" "+session.getId());
} catch(FacebookException ex) {
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Error while fetching user's facebook ID");
logger.warning("Error while getting cached (supplied by request params) value " +
"of the user's facebook ID or while fetching it from the Facebook service " +
"if the cached value was not present for some reason. Cached value = {} "+ userClient.getCacheUserId());
return;
}
chain.doFilter(request, response);
}
}
public static FacebookXmlRestClient getUserClient(HttpSession session) {
if(map.containsKey(session))
{
logger.info("return match "+session.getId());
return (FacebookXmlRestClient) map.get(session);
}
else
{
logger.warning("getUserClient() null "+session.getId());
return null;
}
}
}
import com.google.code.facebookapi.FacebookException；
导入com.google.code.facebookapi.FacebookWebappHelper；
导入com.google.code.facebookapi.FacebookXmlRestClient；
导入com.google.code.facebookapi.IFacebookRestClient；
导入java.util.HashMap；
导入java.util.Map；
导入java.util.logging.Logger；
导入org.w3c.dom.Document；
公共类FacebookFilter实现过滤器{
私有静态最终记录器Logger=Logger.getLogger（FacebookFilter.class.getName（））；
私有字符串api_密钥；
私人字符串秘密；
private static Map=new HashMap（）；
public void init（FilterConfig FilterConfig）抛出ServletException{
api_key=filterConfig.getInitParameter（“facebook_api_key”）；
secret=filterConfig.getInitParameter（“facebook_secret_key”）；
如果（api_key==null || secret==null）{
抛出新的ServletException（“无法初始化Facebook用户筛选器，因为”+
“facebook\u api\u密钥或facebook\u秘密上下文初始化”+
“尚未设置参数。请检查它们是否存在”+
“在servlet上下文描述符中。”）；
}否则{
info（“使用facebook API键：“+API_键”）；
}
}
公共空间销毁（）{
}
public void doFilter（ServletRequest-req、ServletResponse-res、FilterChain-chain）抛出IOException、ServletException{
试一试{
HttpServletRequest请求=（HttpServletRequest）请求；
HttpServletResponse=（HttpServletResponse）res；
HttpSession session=request.getSession（true）；
IFacebookRestClient userClient=getUserClient（会话）；
if（userClient==null）{
info（“用户会话还没有Facebook API客户端设置。创建一个并将其存储在用户会话中。”）；
userClient=新的FacebookXmlRestClient（api_密钥，机密）；
logger.info（“将新会话添加到映射”+map.size（）+“”+session.getId（）+“”+userClient.toString（））；
put（会话，用户客户端）；
}
fine（“创建一个FacebookWebappHelper，它将fb_uu请求参数数据复制到userClient中”）；
FacebookWebappHelper facebook=新的FacebookWebappHelper（请求、响应、api_密钥、机密、用户客户端）；
字符串nextPage=request.getRequestURI（）；
nextPage=nextPage.substring（nextPage.indexOf（“/”，1）+1）；//切掉第一个/、上下文路径和第二个/
好的（下一页）；
boolean redirectOccurse=facebook.requireLogin（下一页）；
如果（发生重定向）{
回来
}
重定向发生=facebook.requireFrame（下一页）；
如果（发生重定向）{
回来
}
长facebookUserID；
试一试{
facebookUserID=userClient.users_getLoggedInUser（）；
logger.info（“facebookUserID”+facebookUserID+“”+session.getId（））；
}捕获（FacebookException ex）{
senderro（HttpServletResponse.SC_INTERNAL_SERVER_ERROR，“获取用户facebook ID时出错”）；
logger.warning（“获取缓存（由请求参数提供）值时出错”+
“用户的facebook ID或从facebook服务获取时”+
“如果缓存值由于某种原因不存在。缓存值={}”+userClient.getCacheUserId（））；
回来
}
链式过滤器（请求、响应）；
}
}
公共静态FacebookXmlRestClient getUserClient（HttpSession会话）{
if（地图容器（会话））
{
info（“return match”+session.getId（））；
return（FacebookXmlRestClient）map.get（session）；
}
其他的
{
警告（“getUserClient（）null”+session.getId（））；
返回null；
}
}
}
HttpSession可序列化map.put(session.getId(),userClient);
我没有将userClient设置为http会话或请求对象的属性或参数（以避免可序列化问题），而是将其添加到普通映射中。当您尝试将其放入映射时，是否会出现相同的错误消息？您是否尝试了我的建议（使用会话ID）？