From 623a74d0a86d37f3ce43a2298301a204ec7abd96 Mon Sep 17 00:00:00 2001
From: Tim Emiola <temiola@google.com>
Date: Tue, 11 Aug 2015 09:24:20 -0700
Subject: [PATCH] Exposes call#peer, channel#target

---
 src/ruby/ext/grpc/rb_call.c         | 14 ++++++++++++++
 src/ruby/ext/grpc/rb_channel.c      | 17 +++++++++++++++++
 src/ruby/spec/client_server_spec.rb | 17 +++++++++++++++++
 3 files changed, 48 insertions(+)

diff --git a/src/ruby/ext/grpc/rb_call.c b/src/ruby/ext/grpc/rb_call.c
index a7607a83a36..88659da5354 100644
--- a/src/ruby/ext/grpc/rb_call.c
+++ b/src/ruby/ext/grpc/rb_call.c
@@ -179,6 +179,19 @@ static VALUE grpc_rb_call_cancel(VALUE self) {
   return Qnil;
 }
 
+/* Called to obtain the peer that this call is connected to. */
+static VALUE grpc_rb_call_get_peer(VALUE self) {
+  VALUE res = Qnil;
+  grpc_call *call = NULL;
+  char *peer = NULL;
+  TypedData_Get_Struct(self, grpc_call, &grpc_call_data_type, call);
+  peer = grpc_call_get_peer(call);
+  res = rb_str_new2(peer);
+  gpr_free(peer);
+
+  return res;
+}
+
 /*
   call-seq:
   status = call.status
@@ -720,6 +733,7 @@ void Init_grpc_call() {
   /* Add ruby analogues of the Call methods. */
   rb_define_method(grpc_rb_cCall, "run_batch", grpc_rb_call_run_batch, 4);
   rb_define_method(grpc_rb_cCall, "cancel", grpc_rb_call_cancel, 0);
+  rb_define_method(grpc_rb_cCall, "peer", grpc_rb_call_get_peer, 0);
   rb_define_method(grpc_rb_cCall, "status", grpc_rb_call_get_status, 0);
   rb_define_method(grpc_rb_cCall, "status=", grpc_rb_call_set_status, 1);
   rb_define_method(grpc_rb_cCall, "metadata", grpc_rb_call_get_metadata, 0);
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index a0663607c24..43d9937d748 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -37,6 +37,7 @@
 
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
 #include "rb_grpc.h"
 #include "rb_call.h"
 #include "rb_channel_args.h"
@@ -249,6 +250,21 @@ static VALUE grpc_rb_channel_destroy(VALUE self) {
   return Qnil;
 }
 
+
+/* Called to obtain the target that this channel accesses. */
+static VALUE grpc_rb_channel_get_target(VALUE self) {
+  grpc_rb_channel *wrapper = NULL;
+  VALUE res = Qnil;
+  char* target = NULL;
+
+  TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
+  target = grpc_channel_get_target(wrapper->wrapped);
+  res = rb_str_new2(target);
+  gpr_free(target);
+
+  return res;
+}
+
 void Init_grpc_channel() {
   grpc_rb_cChannelArgs = rb_define_class("TmpChannelArgs", rb_cObject);
   grpc_rb_cChannel =
@@ -265,6 +281,7 @@ void Init_grpc_channel() {
   /* Add ruby analogues of the Channel methods. */
   rb_define_method(grpc_rb_cChannel, "create_call",
                    grpc_rb_channel_create_call, 4);
+  rb_define_method(grpc_rb_cChannel, "target", grpc_rb_channel_get_target, 0);
   rb_define_method(grpc_rb_cChannel, "destroy", grpc_rb_channel_destroy, 0);
   rb_define_alias(grpc_rb_cChannel, "close", "destroy");
 
diff --git a/src/ruby/spec/client_server_spec.rb b/src/ruby/spec/client_server_spec.rb
index 0e854412099..ed8032517b8 100644
--- a/src/ruby/spec/client_server_spec.rb
+++ b/src/ruby/spec/client_server_spec.rb
@@ -69,6 +69,23 @@ shared_examples 'basic GRPC message delivery is OK' do
   include GRPC::Core
   include_context 'setup: tags'
 
+  context 'the test channel' do
+    it 'should have a target' do
+      expect(@ch.target).to be_a(String)
+    end
+  end
+
+  context 'a client call' do
+    it 'should have a peer' do
+      expect(new_client_call.peer).to be_a(String)
+    end
+  end
+
+  it 'calls have peer info' do
+    call = new_client_call
+    expect(call.peer).to be_a(String)
+  end
+
   it 'servers receive requests from clients and can respond' do
     call = new_client_call
     server_call = nil