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Posted to dev@jclouds.apache.org by SANDEEP BAZAR <sa...@gmail.com> on 2014/07/15 14:04:28 UTC
How to retrive OpenStack Swift object to local file using JClouds
I am trying to store and retrieve binary objects from swift using
org.jclouds.openstack.swift.v1 API.
SwiftApi swiftApi;
ObjectApi objectApi;
SwiftObject object;
swiftApi = ContextBuilder.newBuilder(provider)
.endpoint("http://X.X.X.X:5000/v2.0/")
.credentials(identity, credential)
.modules(modules)
.buildApi(SwiftApi.class);
objectApi = swiftApi.getObjectApiForRegionAndContainer(REGION, objectPath);
object = objectApi.get(objectName);
System.out.println("object: "+object);
*Output:*
object: SwiftObject{name=ssl.txt, uri=
http://X.X.X.X:8080/v1/AUTH_c9b9a23a5e8e4a45921898a5ac306f29/Personal_Info/ssl.txt,
etag=d76cad4bfabde5a5fc16a31a3ce82847, lastModified=Tue Jul 15 15:42:33 IST
2014, metadata={key1=value1, key3=value3, key2=value2}}
When I dump the stream as string I see headers and mime parts arriving but
I don't understand how to access the data
Is there any way to get the content of the object and write to the local
file.
--
Thanks
Sandeep Bazar
Re: How to retrive OpenStack Swift object to local file using JClouds
Posted by SANDEEP BAZAR <sa...@gmail.com>.
Thank you for quick response. It helped.
On Tue, Jul 15, 2014 at 5:49 PM, Markus von Rüden <mv...@opennms.com> wrote:
> On 15.07.2014 14:04, SANDEEP BAZAR wrote:
> > I am trying to store and retrieve binary objects from swift using
> > org.jclouds.openstack.swift.v1 API.
> >
> > SwiftApi swiftApi;
> > ObjectApi objectApi;
> > SwiftObject object;
> > swiftApi = ContextBuilder.newBuilder(provider)
> > .endpoint("http://X.X.X.X:5000/v2.0/")
> > .credentials(identity, credential)
> > .modules(modules)
> > .buildApi(SwiftApi.class);
> >
> > objectApi = swiftApi.getObjectApiForRegionAndContainer(REGION,
> objectPath);
> > object = objectApi.get(objectName);
> > System.out.println("object: "+object);
> >
> > *Output:*
> > object: SwiftObject{name=ssl.txt, uri=
> >
> http://X.X.X.X:8080/v1/AUTH_c9b9a23a5e8e4a45921898a5ac306f29/Personal_Info/ssl.txt
> ,
> > etag=d76cad4bfabde5a5fc16a31a3ce82847, lastModified=Tue Jul 15 15:42:33
> IST
> > 2014, metadata={key1=value1, key3=value3, key2=value2}}
> >
> > When I dump the stream as string I see headers and mime parts arriving
> but
> > I don't understand how to access the data
> >
> > Is there any way to get the content of the object and write to the local
> > file.
> Hey,
>
> when using blob storage APIs (OpenStack Swift, Amazon S3, etc.) you
> usually work on the meta data.
>
> So your example enables you to use the API itself.
> If you want to access the object you need to address the object
> (ObjectAPI) and then use the object's payload.
>
> Have a look at [1] to get started.
>
> It would be something like this:
>
> ObjectApi objectApi =
> swiftApi.getObjectApiForRegionAndContainer("MyRegion", "MyContainerName");
> SwiftObject object = objectApi.get("file.txt"); // the object name
> Payload payload = object.getPayload();
>
> With that payload you can then download the object.
> Either with java build in mechanisms or using a 3rd party library such
> as Google Guava.
>
> See [2] for Payload details.
>
> Kind regards
> Markus¹
>
>
> [1] https://jclouds.apache.org/guides/openstack/#swift
> [2]
>
> http://jclouds.apache.org/reference/javadoc/1.7.x/org/jclouds/io/Payload.html
>
Re: How to retrive OpenStack Swift object to local file using JClouds
Posted by Markus von Rüden <mv...@opennms.com>.
On 15.07.2014 14:04, SANDEEP BAZAR wrote:
> I am trying to store and retrieve binary objects from swift using
> org.jclouds.openstack.swift.v1 API.
>
> SwiftApi swiftApi;
> ObjectApi objectApi;
> SwiftObject object;
> swiftApi = ContextBuilder.newBuilder(provider)
> .endpoint("http://X.X.X.X:5000/v2.0/")
> .credentials(identity, credential)
> .modules(modules)
> .buildApi(SwiftApi.class);
>
> objectApi = swiftApi.getObjectApiForRegionAndContainer(REGION, objectPath);
> object = objectApi.get(objectName);
> System.out.println("object: "+object);
>
> *Output:*
> object: SwiftObject{name=ssl.txt, uri=
> http://X.X.X.X:8080/v1/AUTH_c9b9a23a5e8e4a45921898a5ac306f29/Personal_Info/ssl.txt,
> etag=d76cad4bfabde5a5fc16a31a3ce82847, lastModified=Tue Jul 15 15:42:33 IST
> 2014, metadata={key1=value1, key3=value3, key2=value2}}
>
> When I dump the stream as string I see headers and mime parts arriving but
> I don't understand how to access the data
>
> Is there any way to get the content of the object and write to the local
> file.
Hey,
when using blob storage APIs (OpenStack Swift, Amazon S3, etc.) you
usually work on the meta data.
So your example enables you to use the API itself.
If you want to access the object you need to address the object
(ObjectAPI) and then use the object's payload.
Have a look at [1] to get started.
It would be something like this:
ObjectApi objectApi =
swiftApi.getObjectApiForRegionAndContainer("MyRegion", "MyContainerName");
SwiftObject object = objectApi.get("file.txt"); // the object name
Payload payload = object.getPayload();
With that payload you can then download the object.
Either with java build in mechanisms or using a 3rd party library such
as Google Guava.
See [2] for Payload details.
Kind regards
Markus¹
[1] https://jclouds.apache.org/guides/openstack/#swift
[2]
http://jclouds.apache.org/reference/javadoc/1.7.x/org/jclouds/io/Payload.html