gRPC的四種呼叫方式

普通rpc呼叫，客戶端帶乙個請求物件進行呼叫，服務端返回乙個響應物件。

syntax = "proto3";

option csharp_namespace = "grpcdemoservices";
package greet;
// the greeting service definition.
service greeter 
// the request message containing the user's name.
message hellorequest 
// the response message containing the greetings.
message helloreply

private

static
async
task
unarystreamcallexample
(greeter.greeterclient client));
console.
writeline
(reply.message)
;}

public

class
greeterservice
:greeter.greeterbase
public
override task
sayhello
(hellorequest request,
servercallcontext context)")
;return task.
fromresult
(new
helloreply);
}}

客戶端帶乙個請求物件進行呼叫，服務端返回多個響應物件

private

static
async
task
serverstreamingcallexample
(greeter.greeterclient client)
, cancellationtoken: cts.token))"
);}}
catch
(rpcexception ex) when (ex.statuscode == statuscode.cancelled)
}}

public

class
greeterservice
:greeter.greeterbase
public
override
async
task
sayhellos
(hellorequest request, iserverstreamwriter responsestream,
servercallcontext context)?";
await responsestream.
writeasync
(new
helloreply);
await task.
delay
(1000);
}}}

客戶端帶有多個物件進行請求，服務端返回乙個響應物件

syntax = "proto3";

option csharp_namespace = "grpcdemoservices";
package count;
service counter
// the reqeust message containing the count to increment by
message counterrequest 
// the response message containing the current count
message counterreply

private

static
async
task
clientstreamingcallexample
(counter.counterclient client)")
;await call.requeststream.
writeasync
(new
counterrequest);
await task.
delay
(2000);
}await call.requeststream.
completeasync()
;var response =
await call;
console.
writeline
($"count:");
}}

public

void
configureservices
(iservicecollection services)
public
class
incrementingcounter
public
void
increment
(int amount)
}public
class
counterservice
:counter.counterbase
public
override
async task
accumulatecount
(iasyncstreamreader requeststream,
servercallcontext context)")
;            _counter.
increment
(request.count);}
return
newcounterreply;}
}

客戶端帶多個請求物件進行呼叫，服務端返回多個響應物件

syntax = "proto3";

option csharp_namespace = "grpcdemoservices";
package race;
service racer 
message racemessage

private

static
async
task
bidirectionalstreamingexample
(racer.racerclient client)
;    console.
writeline
("ready, set, go!");
using
(var call = client.
readysetgo
(new
calloptions
(headers)))
});// write outgoing messages until timer is complete
var sw = stopwatch.
startnew()
;var sent =0;
while
(sw.elapsed < raceduration));
}// finish call and report results
await call.requeststream.
completeasync()
;await readtask;
console.
writeline
($"messages sent: ");
console.
writeline
($"messages received: ");
}}

public

class
racerservice
:racer.racerbase})
;// write outgoing messages until timer is complete
var sw = stopwatch.
startnew()
;var sent =0;
while
(sw.elapsed < raceduration));
}await readtask;
}}

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