jClouds Swift Bloblist NullPointerException

Question

我正在编写一个项目来列出我的dreamhost存储中的上传文件。但是下面的代码给了我错误..。

PageSet<? extends StorageMetadata> objects = blobStore.list(bucket);

我如何解决上述问题，以得到我的桶中的所有对象列表。桶名是有效的。

例外是：

May 01, 2015 9:35:09 AM org.jclouds.logging.jdk.JDKLogger logError
SEVERE: Error parsing input: name
java.lang.NullPointerException: name
    at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229)
    at org.jclouds.openstack.swift.domain.internal.ObjectInfoImpl.<init>(ObjectInfoImpl.java:154)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at com.google.common.reflect.Invokable$ConstructorInvokable.invokeInternal(Invokable.java:242)
    at com.google.common.reflect.Invokable.invoke(Invokable.java:102)
    at org.jclouds.json.internal.DeserializationConstructorAndReflectiveTypeAdapterFactory$DeserializeIntoParameterizedConstructor.newInstance(DeserializationConstructorAndReflectiveTypeAdapterFactory.java:224)
    at org.jclouds.json.internal.DeserializationConstructorAndReflectiveTypeAdapterFactory$DeserializeIntoParameterizedConstructor.read(DeserializationConstructorAndReflectiveTypeAdapterFactory.java:204)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
    at com.google.gson.Gson.fromJson(Gson.java:805)
    at com.google.gson.Gson.fromJson(Gson.java:770)
    at com.google.gson.Gson.fromJson(Gson.java:719)
    at org.jclouds.json.internal.GsonWrapper.fromJson(GsonWrapper.java:42)
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:83)
    at org.jclouds.openstack.swift.functions.ParseObjectInfoListFromJsonResponse.apply(ParseObjectInfoListFromJsonResponse.java:71)
    at org.jclouds.openstack.swift.functions.ParseObjectInfoListFromJsonResponse.apply(ParseObjectInfoListFromJsonResponse.java:51)
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:62)
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:42)
    at org.jclouds.rest.internal.InvokeHttpMethod.invoke(InvokeHttpMethod.java:90)
    at org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:73)
    at org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:44)
    at org.jclouds.rest.internal.DelegatesToInvocationFunction.handle(DelegatesToInvocationFunction.java:156)
    at org.jclouds.rest.internal.DelegatesToInvocationFunction.invoke(DelegatesToInvocationFunction.java:123)
    at com.sun.proxy.$Proxy49.listObjects(Unknown Source)
    at org.jclouds.openstack.swift.blobstore.SwiftBlobStore.list(SwiftBlobStore.java:153)
    at org.jclouds.blobstore.internal.BaseBlobStore.list(BaseBlobStore.java:81)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.inject.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:37)
    at com.sun.proxy.$Proxy51.list(Unknown Source)
    at com.tigerworks.objectstore.sample.swift.BlobStoreDemo.listBucketBlobs(BlobStoreDemo.java:54)
    at com.tigerworks.objectstore.sample.swift.BlobStoreDemo.runBlobStoreDemo(BlobStoreDemo.java:91)
    at com.tigerworks.Main.main(Main.java:12)

Exception in thread "main" org.jclouds.http.HttpResponseException: Error parsing input: name
{statusCode=200, message=OK, headers={Transfer-Encoding=[chunked], Server=[Apache], Date=[Fri, 01 May 2015 03:35:09 GMT]}, payload=[content=true, contentMetadata=[contentDisposition=null, contentEncoding=null, contentLanguage=null, contentLength=null, contentMD5=null, contentType=application/json; charset=utf-8, expires=null], written=false]}
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:68)
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:42)
    at org.jclouds.rest.internal.InvokeHttpMethod.invoke(InvokeHttpMethod.java:90)
    at org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:73)
    at org.jclouds.rest.internal.InvokeHttpMethod.apply(InvokeHttpMethod.java:44)
    at org.jclouds.rest.internal.DelegatesToInvocationFunction.handle(DelegatesToInvocationFunction.java:156)
    at org.jclouds.rest.internal.DelegatesToInvocationFunction.invoke(DelegatesToInvocationFunction.java:123)
    at com.sun.proxy.$Proxy49.listObjects(Unknown Source)
    at org.jclouds.openstack.swift.blobstore.SwiftBlobStore.list(SwiftBlobStore.java:153)
    at org.jclouds.blobstore.internal.BaseBlobStore.list(BaseBlobStore.java:81)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.inject.internal.DelegatingInvocationHandler.invoke(DelegatingInvocationHandler.java:37)
    at com.sun.proxy.$Proxy51.list(Unknown Source)
    at com.tigerworks.objectstore.sample.swift.BlobStoreDemo.listBucketBlobs(BlobStoreDemo.java:54)
    at com.tigerworks.objectstore.sample.swift.BlobStoreDemo.runBlobStoreDemo(BlobStoreDemo.java:91)
    at com.tigerworks.Main.main(Main.java:12)
Caused by: java.lang.NullPointerException: name
    at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229)
    at org.jclouds.openstack.swift.domain.internal.ObjectInfoImpl.<init>(ObjectInfoImpl.java:154)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at com.google.common.reflect.Invokable$ConstructorInvokable.invokeInternal(Invokable.java:242)
    at com.google.common.reflect.Invokable.invoke(Invokable.java:102)
    at org.jclouds.json.internal.DeserializationConstructorAndReflectiveTypeAdapterFactory$DeserializeIntoParameterizedConstructor.newInstance(DeserializationConstructorAndReflectiveTypeAdapterFactory.java:224)
    at org.jclouds.json.internal.DeserializationConstructorAndReflectiveTypeAdapterFactory$DeserializeIntoParameterizedConstructor.read(DeserializationConstructorAndReflectiveTypeAdapterFactory.java:204)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
    at com.google.gson.Gson.fromJson(Gson.java:805)
    at com.google.gson.Gson.fromJson(Gson.java:770)
    at com.google.gson.Gson.fromJson(Gson.java:719)
    at org.jclouds.json.internal.GsonWrapper.fromJson(GsonWrapper.java:42)
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:83)
    at org.jclouds.openstack.swift.functions.ParseObjectInfoListFromJsonResponse.apply(ParseObjectInfoListFromJsonResponse.java:71)
    at org.jclouds.openstack.swift.functions.ParseObjectInfoListFromJsonResponse.apply(ParseObjectInfoListFromJsonResponse.java:51)
    at org.jclouds.http.functions.ParseJson.apply(ParseJson.java:62)
    ... 18 more

Answer 1

系统里有一个文件夹。当存储桶中有一个文件夹时，列表会给出异常。