Thanks! I'm already using eclipse to browse the code. In this scenario, i could understand that java serializes the object through the network and its parameters. is that ok?
For example, if i want to make a pure C library (with no JNI interfaces).. is it possible/feasible? or it will be like to freeze the hell? Thanks once again!!! On Sat, Apr 3, 2010 at 1:54 AM, Ryan Rawson <ryano...@gmail.com> wrote: > If you look at the getProxy code it passes an "Invoker" (or something > like that) which the proxy code uses to delegate calls TO. The > Invoker will call another class "Client" which has sub-classes like > Call, and Connection which wrap the actual java IO. This all lives in > the org.apache.hadoop.ipc package. > > Be sure to use a good IDE like IJ or Eclipse to browse the code, it > makes following all this stuff much easier. > > > > > > On Fri, Apr 2, 2010 at 4:39 PM, Alberich de megres > <alberich...@gmail.com> wrote: >> Hi again! >> >> Anyone could help me? >> I could not understand how RPC class works. For me, only tries to >> instantiates a single interfaces with no declaration for some methods >> like blockreport. But then it uses rpc.getproxy to get new class wich >> send messages with name node. >> >> I'm sorry for this silly question, but i am really lost at this point. >> >> Thanks for the patience. >> >> >> >> On Fri, Apr 2, 2010 at 2:11 AM, Alberich de megres >> <alberich...@gmail.com> wrote: >>> Hi Jay! >>> >>> thanks for the answear but i'm asking for what it works it sends? >>> blockreport is an interface in DatanodeProtocol that has no >>> declaration. >>> >>> thanks! >>> >>> >>> >>> On Thu, Apr 1, 2010 at 5:50 PM, Jay Booth <jaybo...@gmail.com> wrote: >>>> In DataNode: >>>> public DatanodeProtocol namenode >>>> >>>> It's not a reference to an actual namenode, it's a wrapper for a network >>>> protocol created by that RPC.waitForProxy call -- so when it calls >>>> namenode.blockReport, it's sending that information over RPC to the >>>> namenode >>>> instance over the network >>>> >>>> On Thu, Apr 1, 2010 at 5:50 AM, Alberich de megres >>>> <alberich...@gmail.com>wrote: >>>> >>>>> Hi everyone! >>>>> >>>>> sailing throught the hdfs source code that comes with hadoop 0.20.2, i >>>>> could not understand how hdfs sends blockreport to nameNode. >>>>> >>>>> As i can see, in >>>>> src/hdfs/org/apache/hadoop/hdfs/server/datanode/DataNode.java we >>>>> create this.namenode interface with RPC.waitForProxy call (wich i >>>>> could not understand which class it instantiates, and how it works). >>>>> >>>>> After that, datanode generates block list report (blockListAsLongs) >>>>> with data.getBlockReport, and call this.namenode.blockReport(..), >>>>> inside namenode.blockReport it calls again namesystem.processReport. >>>>> This leads to an update of block lists inside nameserver. >>>>> >>>>> But how it sends over the network this blockreport? >>>>> >>>>> Anyone can point me some light? >>>>> >>>>> thanks for all! >>>>> (and sorry for the newbie question) >>>>> >>>>> Alberich >>>>> >>>> >>> >> >
