RE: question about matching java API with libHDFS
You could refer to the header file: “src/main/native/libhdfs/hdfs.h”, you could get the APIs in detail. Regards, Yi Liu From: Demai Ni [mailto:nid...@gmail.com] Sent: Thursday, September 04, 2014 5:21 AM To: user@hadoop.apache.org Subject: question about matching java API with libHDFS hi, folks, I am currently using java to access HDFS. for example, I am using this API DFSclient.getNamenode().getBlockLocations(...)... to retrieve file block information. Now I need to move the same logic into C/C++. so I am looking at libHDFS, and this wiki page: http://wiki.apache.org/hadoop/LibHDFS. And I am also using the hdfs_test.c for some reference. However, I couldn't find a way to easily figure out whether above Java API is exposed through libHDFS? Probably not, since I couldn't find it. Then, it lead to my next question. Is there an easy way to plug in the libHDFS framework, to include additonal API? thanks a lot for your suggestions Demai
Re: question about matching java API with libHDFS
hi, Yi A, Thanks for your response. I took a look at hdfs.h and hdfs.c, it seems the lib only exposes some of APIs, as there are a lot of other public methods can be accessed through java API/client, but not implemented in libhdfs, such as the one I am using now: DFSclient.getNamenode(). getBlockLocations(...).. Is the libhdfs designed to limit the access? Thanks Demai On Thu, Sep 4, 2014 at 2:36 AM, Liu, Yi A yi.a@intel.com wrote: You could refer to the header file: “src/main/native/libhdfs/hdfs.h”, you could get the APIs in detail. Regards, Yi Liu *From:* Demai Ni [mailto:nid...@gmail.com] *Sent:* Thursday, September 04, 2014 5:21 AM *To:* user@hadoop.apache.org *Subject:* question about matching java API with libHDFS hi, folks, I am currently using java to access HDFS. for example, I am using this API DFSclient.getNamenode().getBlockLocations(...)... to retrieve file block information. Now I need to move the same logic into C/C++. so I am looking at libHDFS, and this wiki page: http://wiki.apache.org/hadoop/LibHDFS. And I am also using the hdfs_test.c for some reference. However, I couldn't find a way to easily figure out whether above Java API is exposed through libHDFS? Probably not, since I couldn't find it. Then, it lead to my next question. Is there an easy way to plug in the libHDFS framework, to include additonal API? thanks a lot for your suggestions Demai
question about matching java API with libHDFS
hi, folks, I am currently using java to access HDFS. for example, I am using this API DFSclient.getNamenode().getBlockLocations(...)... to retrieve file block information. Now I need to move the same logic into C/C++. so I am looking at libHDFS, and this wiki page: http://wiki.apache.org/hadoop/LibHDFS. And I am also using the hdfs_test.c for some reference. However, I couldn't find a way to easily figure out whether above Java API is exposed through libHDFS? Probably not, since I couldn't find it. Then, it lead to my next question. Is there an easy way to plug in the libHDFS framework, to include additonal API? thanks a lot for your suggestions Demai
