我最近将我的应用引擎SDK从1.7.7.1升级到1.8.5，我的端点API停止工作。我的API资源管理器甚至不会加载。在调高我的日志级别后，当我尝试访问API资源管理器时，我发现了以下错误。我一直在使用我的工作区和谷歌应用程序引擎遇到一些麻烦所以我决定使用最新的应用程序引擎SDK（1.8的新副本）设置全新的eclipse安装（eclipse-jee-juno-SR2-win32-x86_64） .5）我通过市场安装的。我创建了一个名为Book的基本实体，并生成了一个名为BookEndpoint的端点（参见下面的代码），错误仍然存在。
任何想法？
FINE: started Server@4c469ca0
Oct 08, 2013 5:29:20 PM com.google.apphosting.utils.jetty.JettyLogger debug
FINE: File added: C:\Users\Daniel\workspace\wspace_rebuild\testgce\war\WEB-INF\appengine-web.xml
Oct 08, 2013 5:29:20 PM com.google.appengine.tools.development.AbstractModule startup
INFO: Module instance default is running at http:// localhost:8888/
Oct 08, 2013 5:29:20 PM com.google.appengine.tools.development.AbstractModule startup
INFO: The admin console is running at http:// localhost:8888/_ah/admin
Oct 08, 2013 1:29:20 PM com.google.appengine.tools.development.DevAppServerImpl doStart
INFO: Dev App Server is now running
Oct 08, 2013 1:29:47 PM com.google.appengine.tools.development.DevAppServerModulesFilter getCurrentModuleInstance
FINE: Exception getting module instance
com.google.appengine.api.labs.modules.ModulesException: No valid instance id for this instance.
at com.google.appengine.api.labs.modules.ModulesServiceImpl.getCurrentInstanceId(ModulesServiceImpl.java:68)
at com.google.appengine.tools.development.DevAppServerModulesFilter.getCurrentModuleInstance(DevAppServerModulesFilter.java:210)
at com.google.appengine.tools.development.DevAppServerModulesFilter.isLoadBalancingRequest(DevAppServerModulesFilter.java:186)
at com.google.appengine.tools.development.DevAppServerModulesFilter.getRequestType(DevAppServerModulesFilter.java:175)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:113)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:97)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:485)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
package com.dan;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import com.google.appengine.api.datastore.Key;
@Entity
public class Book {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key key;
private String name;
public Key getKey() {
return key;
}
public void setKey(Key key) {
this.key = key;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
package com.dan;
import com.dan.EMF;
import com.google.api.server.spi.config.Api;
import com.google.api.server.spi.config.ApiMethod;
import com.google.api.server.spi.config.ApiNamespace;
import com.google.api.server.spi.response.CollectionResponse;
import com.google.appengine.api.datastore.Cursor;
import com.google.appengine.datanucleus.query.JPACursorHelper;
import java.util.List;
import javax.annotation.Nullable;
import javax.inject.Named;
import javax.persistence.EntityExistsException;
import javax.persistence.EntityNotFoundException;
import javax.persistence.EntityManager;
import javax.persistence.Query;
@Api(name = "bookendpoint", namespace = @ApiNamespace(ownerDomain = "dan.com", ownerName = "dan.com", packagePath = ""))
public class BookEndpoint {
/**
* This method lists all the entities inserted in datastore.
* It uses HTTP GET method and paging support.
*
* @return A CollectionResponse class containing the list of all entities
* persisted and a cursor to the next page.
*/
@SuppressWarnings({ "unchecked", "unused" })
@ApiMethod(name = "listBook")
public CollectionResponse<Book> listBook(
@Nullable @Named("cursor") String cursorString,
@Nullable @Named("limit") Integer limit) {
EntityManager mgr = null;
Cursor cursor = null;
List<Book> execute = null;
try {
mgr = getEntityManager();
Query query = mgr.createQuery("select from Book as Book");
if (cursorString != null && cursorString != "") {
cursor = Cursor.fromWebSafeString(cursorString);
query.setHint(JPACursorHelper.CURSOR_HINT, cursor);
}
if (limit != null) {
query.setFirstResult(0);
query.setMaxResults(limit);
}
execute = (List<Book>) query.getResultList();
cursor = JPACursorHelper.getCursor(execute);
if (cursor != null)
cursorString = cursor.toWebSafeString();
// Tight loop for fetching all entities from datastore and accomodate
// for lazy fetch.
for (Book obj : execute);
} finally {
mgr.close();
}
return CollectionResponse.<Book> builder().setItems(execute)
.setNextPageToken(cursorString).build();
}
/**
* This method gets the entity having primary key id. It uses HTTP GET method.
*
* @param id the primary key of the java bean.
* @return The entity with primary key id.
*/
@ApiMethod(name = "getBook")
public Book getBook(@Named("id") Long id) {
EntityManager mgr = getEntityManager();
Book book = null;
try {
book = mgr.find(Book.class, id);
} finally {
mgr.close();
}
return book;
}
/**
* This inserts a new entity into App Engine datastore. If the entity already
* exists in the datastore, an exception is thrown.
* It uses HTTP POST method.
*
* @param book the entity to be inserted.
* @return The inserted entity.
*/
@ApiMethod(name = "insertBook")
public Book insertBook(Book book) {
EntityManager mgr = getEntityManager();
try {
if (containsBook(book)) {
throw new EntityExistsException("Object already exists");
}
mgr.persist(book);
} finally {
mgr.close();
}
return book;
}
/**
* This method is used for updating an existing entity. If the entity does not
* exist in the datastore, an exception is thrown.
* It uses HTTP PUT method.
*
* @param book the entity to be updated.
* @return The updated entity.
*/
@ApiMethod(name = "updateBook")
public Book updateBook(Book book) {
EntityManager mgr = getEntityManager();
try {
if (!containsBook(book)) {
throw new EntityNotFoundException("Object does not exist");
}
mgr.persist(book);
} finally {
mgr.close();
}
return book;
}
/**
* This method removes the entity with primary key id.
* It uses HTTP DELETE method.
*
* @param id the primary key of the entity to be deleted.
*/
@ApiMethod(name = "removeBook")
public void removeBook(@Named("id") Long id) {
EntityManager mgr = getEntityManager();
try {
Book book = mgr.find(Book.class, id);
mgr.remove(book);
} finally {
mgr.close();
}
}
private boolean containsBook(Book book) {
EntityManager mgr = getEntityManager();
boolean contains = true;
try {
Book item = mgr.find(Book.class, book.getKey());
if (item == null) {
contains = false;
}
} finally {
mgr.close();
}
return contains;
}
private static EntityManager getEntityManager() {
return EMF.get().createEntityManager();
}
}
{
"extends" : "thirdParty.api",
"abstract" : false,
"root" : "https://appname.appspot.com/_ah/api",
"name" : "bookendpoint",
"version" : "v1",
"defaultVersion" : false,
"adapter" : {
"bns" : "https://appname.appspot.com/_ah/spi",
"deadline" : 10.0,
"type" : "lily"
},
"auth" : {
"allowCookieAuth" : false
},
"frontendLimits" : {
"unregisteredUserQps" : -1,
"unregisteredQps" : -1,
"unregisteredDaily" : -1,
"rules" : [ ]
},
"cacheControl" : {
"type" : "no-cache",
"maxAge" : 0
},
"ownerDomain" : "dan.com",
"ownerName" : "dan.com",
"methods" : {
"bookendpoint.removeBook" : {
"path" : "book/{id}",
"httpMethod" : "DELETE",
"authLevel" : "NONE",
"scopes" : [ "https://www.googleapis.com/auth/userinfo.email" ],
"audiences" : [ ],
"clientIds" : [ "292824132082.apps.googleusercontent.com" ],
"rosyMethod" : "com.dan.BookEndpoint.removeBook",
"request" : {
"parameters" : {
"id" : {
"type" : "int64",
"required" : true
}
},
"body" : "empty"
},
"response" : {
"body" : "empty"
}
},
"bookendpoint.insertBook" : {
"path" : "book",
"httpMethod" : "POST",
"authLevel" : "NONE",
"scopes" : [ "https://www.googleapis.com/auth/userinfo.email" ],
"audiences" : [ ],
"clientIds" : [ "292824132082.apps.googleusercontent.com" ],
"rosyMethod" : "com.dan.BookEndpoint.insertBook",
"request" : {
"body" : "autoTemplate(backendRequest)",
"bodyName" : "resource"
},
"response" : {
"body" : "autoTemplate(backendResponse)"
}
},
"bookendpoint.getBook" : {
"path" : "book/{id}",
"httpMethod" : "GET",
"authLevel" : "NONE",
"scopes" : [ "https://www.googleapis.com/auth/userinfo.email" ],
"audiences" : [ ],
"clientIds" : [ "292824132082.apps.googleusercontent.com" ],
"rosyMethod" : "com.dan.BookEndpoint.getBook",
"request" : {
"parameters" : {
"id" : {
"type" : "int64",
"required" : true
}
},
"body" : "empty"
},
"response" : {
"body" : "autoTemplate(backendResponse)"
}
},
"bookendpoint.updateBook" : {
"path" : "book",
"httpMethod" : "PUT",
"authLevel" : "NONE",
"scopes" : [ "https://www.googleapis.com/auth/userinfo.email" ],
"audiences" : [ ],
"clientIds" : [ "292824132082.apps.googleusercontent.com" ],
"rosyMethod" : "com.dan.BookEndpoint.updateBook",
"request" : {
"body" : "autoTemplate(backendRequest)",
"bodyName" : "resource"
},
"response" : {
"body" : "autoTemplate(backendResponse)"
}
},
"bookendpoint.listBook" : {
"path" : "book",
"httpMethod" : "GET",
"authLevel" : "NONE",
"scopes" : [ "https://www.googleapis.com/auth/userinfo.email" ],
"audiences" : [ ],
"clientIds" : [ "292824132082.apps.googleusercontent.com" ],
"rosyMethod" : "com.dan.BookEndpoint.listBook",
"request" : {
"parameters" : {
"cursor" : {
"type" : "string",
"required" : false
},
"limit" : {
"type" : "int32",
"required" : false
}
},
"body" : "empty"
},
"response" : {
"body" : "autoTemplate(backendResponse)"
}
}
},
"descriptor" : {
"schemas" : {
"Book" : {
"id" : "Book",
"type" : "object",
"properties" : {
"key" : {
"$ref" : "Key"
},
"name" : {
"type" : "string"
}
}
},
"Key" : {
"id" : "Key",
"type" : "object",
"properties" : {
"kind" : {
"type" : "string"
},
"appId" : {
"type" : "string"
},
"id" : {
"type" : "string",
"format" : "int64"
},
"name" : {
"type" : "string"
},
"parent" : {
"$ref" : "Key"
},
"complete" : {
"type" : "boolean"
},
"namespace" : {
"type" : "string"
}
}
},
"CollectionResponse_Book" : {
"id" : "CollectionResponse_Book",
"type" : "object",
"properties" : {
"items" : {
"type" : "array",
"items" : {
"$ref" : "Book"
}
},
"nextPageToken" : {
"type" : "string"
}
}
}
},
"methods" : {
"com.dan.BookEndpoint.removeBook" : {
},
"com.dan.BookEndpoint.insertBook" : {
"request" : {
"$ref" : "Book"
},
"response" : {
"$ref" : "Book"
}
},
"com.dan.BookEndpoint.getBook" : {
"response" : {
"$ref" : "Book"
}
},
"com.dan.BookEndpoint.updateBook" : {
"request" : {
"$ref" : "Book"
},
"response" : {
"$ref" : "Book"
}
},
"com.dan.BookEndpoint.listBook" : {
"response" : {
"$ref" : "CollectionResponse_Book"
}
}
}
}
}
答案 0 :(得分：0)
ModulesException是开发服务器上的已知问题：
https://code.google.com/p/googleappengine/issues/detail?id=10412
它与端点问题无关。