59 lines
2.0 KiB
Go
59 lines
2.0 KiB
Go
package kvraft
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import (
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"6.5840/kvsrv1/rpc"
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"6.5840/kvtest1"
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"6.5840/tester1"
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)
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type Clerk struct {
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clnt *tester.Clnt
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servers []string
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// You will have to modify this struct.
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}
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func MakeClerk(clnt *tester.Clnt, servers []string) kvtest.IKVClerk {
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ck := &Clerk{clnt: clnt, servers: servers}
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// You'll have to add code here.
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return ck
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}
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// Get fetches the current value and version for a key. It returns
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// ErrNoKey if the key does not exist. It keeps trying forever in the
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// face of all other errors.
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//
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// You can send an RPC to server i with code like this:
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// ok := ck.clnt.Call(ck.servers[i], "KVServer.Get", &args, &reply)
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//
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// The types of args and reply (including whether they are pointers)
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// must match the declared types of the RPC handler function's
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// arguments. Additionally, reply must be passed as a pointer.
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func (ck *Clerk) Get(key string) (string, rpc.Tversion, rpc.Err) {
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// You will have to modify this function.
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return "", 0, ""
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}
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// Put updates key with value only if the version in the
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// request matches the version of the key at the server. If the
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// versions numbers don't match, the server should return
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// ErrVersion. If Put receives an ErrVersion on its first RPC, Put
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// should return ErrVersion, since the Put was definitely not
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// performed at the server. If the server returns ErrVersion on a
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// resend RPC, then Put must return ErrMaybe to the application, since
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// its earlier RPC might have been processed by the server successfully
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// but the response was lost, and the the Clerk doesn't know if
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// the Put was performed or not.
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//
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// You can send an RPC to server i with code like this:
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// ok := ck.clnt.Call(ck.servers[i], "KVServer.Put", &args, &reply)
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//
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// The types of args and reply (including whether they are pointers)
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// must match the declared types of the RPC handler function's
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// arguments. Additionally, reply must be passed as a pointer.
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func (ck *Clerk) Put(key string, value string, version rpc.Tversion) rpc.Err {
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// You will have to modify this function.
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return ""
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}
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