小编use*_*268的帖子

我已经使用Google端点创建了一个方法并将其公开.我想要的只是从Google DataStore保存和检索数据.

当我尝试使用API​​ Explorer进行测试时,出现以下错误 -

java.lang.NoSuchMethodError

我已附上以下代码

 @ApiMethod (name ="mTest")
    public void mTest(@com.google.api.server.spi.config.Named("UName") String UName) throws IOException {

        DatastoreService datastoreService;
        datastoreService = DatastoreServiceFactory.getDatastoreService();
        Transaction tx=datastoreService.beginTransaction();
        try {
            Key userKey = KeyFactory.createKey("USERS_PK", UName);
            Entity userEntity=new Entity("M_USERS",userKey);
            userEntity.setProperty("TestColumn","TestColumnValue");
            datastoreService.put(userEntity);
            tx.commit();
        }finally {
            if (tx.isActive()){
                tx.rollback();
            }
        }
}

在datastoreService.put(userEntity)上遇到错误 ;

请在下面找到堆栈跟踪:

Jun 29, 2014 5:12:20 PM com.google.api.server.spi.SystemService invokeServiceMethod
INFO: cause={0}

java.lang.NoSuchMethodError: com.google.appengine.api.datastore.Key.getAppIdNamespace()Lcom/google/appengine/api/datastore/AppIdNamespace;
    at com.google.appengine.api.datastore.KeyTranslator.convertToPb(KeyTranslator.java:49)
    at com.google.appengine.api.datastore.EntityTranslator.convertToPb(EntityTranslator.java:50)
    at com.google.appengine.api.datastore.AsyncDatastoreServiceImpl$4.toPb(AsyncDatastoreServiceImpl.java:203)
    at com.google.appengine.api.datastore.AsyncDatastoreServiceImpl$4.toPb(AsyncDatastoreServiceImpl.java:180)
    at com.google.appengine.api.datastore.Batcher$BatchIterator.<init>(Batcher.java:177)
    at com.google.appengine.api.datastore.Batcher$2.<init>(Batcher.java:312)
    at com.google.appengine.api.datastore.Batcher.getBatches(Batcher.java:312)
    at com.google.appengine.api.datastore.AsyncDatastoreServiceImpl.doBatchPut(AsyncDatastoreServiceImpl.java:536) …