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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <grpc++/channel.h>
#include <grpc++/client_context.h>
#include <grpc++/create_channel.h>
#include <grpc++/server.h>
#include <grpc++/server_builder.h>
#include <grpc++/server_context.h>
#include <grpc/grpc.h>
#include <grpc/grpc_zookeeper.h>
#include <gtest/gtest.h>
#include <zookeeper/zookeeper.h>
#include "src/core/lib/support/env.h"
#include "src/proto/grpc/testing/echo.grpc.pb.h"
#include "test/core/util/port.h"
#include "test/core/util/test_config.h"
using grpc::testing::EchoRequest;
using grpc::testing::EchoResponse;
namespace grpc {
namespace testing {
class ZookeeperTestServiceImpl
: public ::grpc::testing::EchoTestService::Service {
public:
Status Echo(ServerContext* context, const EchoRequest* request,
EchoResponse* response) GRPC_OVERRIDE {
response->set_message(request->message());
return Status::OK;
}
};
class ZookeeperTest : public ::testing::Test {
protected:
ZookeeperTest() {}
void SetUp() GRPC_OVERRIDE {
SetUpZookeeper();
// Sets up two servers
int port1 = grpc_pick_unused_port_or_die();
server1_ = SetUpServer(port1);
int port2 = grpc_pick_unused_port_or_die();
server2_ = SetUpServer(port2);
// Registers service /test in zookeeper
RegisterService("/test", "test");
// Registers service instance /test/1 in zookeeper
string value =
"{\"host\":\"localhost\",\"port\":\"" + to_string(port1) + "\"}";
RegisterService("/test/1", value);
// Registers service instance /test/2 in zookeeper
value = "{\"host\":\"localhost\",\"port\":\"" + to_string(port2) + "\"}";
RegisterService("/test/2", value);
}
// Requires zookeeper server running
void SetUpZookeeper() {
// Finds zookeeper server address in environment
// Default is localhost:2181
zookeeper_address_ = "localhost:2181";
char* addr = gpr_getenv("GRPC_ZOOKEEPER_SERVER_TEST");
if (addr != NULL) {
string addr_str(addr);
zookeeper_address_ = addr_str;
gpr_free(addr);
}
gpr_log(GPR_DEBUG, zookeeper_address_.c_str());
// Connects to zookeeper server
zoo_set_debug_level(ZOO_LOG_LEVEL_WARN);
zookeeper_handle_ =
zookeeper_init(zookeeper_address_.c_str(), NULL, 15000, 0, 0, 0);
GPR_ASSERT(zookeeper_handle_ != NULL);
// Registers zookeeper name resolver in grpc
grpc_zookeeper_register();
}
std::unique_ptr<Server> SetUpServer(const int port) {
string server_address = "localhost:" + to_string(port);
ServerBuilder builder;
builder.AddListeningPort(server_address, InsecureServerCredentials());
builder.RegisterService(&service_);
std::unique_ptr<Server> server = builder.BuildAndStart();
return server;
}
void RegisterService(const string& name, const string& value) {
char* path = (char*)gpr_malloc(name.size());
int status = zoo_exists(zookeeper_handle_, name.c_str(), 0, NULL);
if (status == ZNONODE) {
status =
zoo_create(zookeeper_handle_, name.c_str(), value.c_str(),
value.size(), &ZOO_OPEN_ACL_UNSAFE, 0, path, name.size());
} else {
status = zoo_set(zookeeper_handle_, name.c_str(), value.c_str(),
value.size(), -1);
}
gpr_free(path);
GPR_ASSERT(status == 0);
}
void DeleteService(const string& name) {
int status = zoo_delete(zookeeper_handle_, name.c_str(), -1);
GPR_ASSERT(status == 0);
}
void ChangeZookeeperState() {
server1_->Shutdown();
DeleteService("/test/1");
}
void TearDown() GRPC_OVERRIDE {
server1_->Shutdown();
server2_->Shutdown();
zookeeper_close(zookeeper_handle_);
}
void ResetStub() {
string target = "zookeeper://" + zookeeper_address_ + "/test";
channel_ = CreateChannel(target, InsecureChannelCredentials());
stub_ = grpc::testing::EchoTestService::NewStub(channel_);
}
string to_string(const int number) {
std::stringstream strs;
strs << number;
return strs.str();
}
std::shared_ptr<Channel> channel_;
std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
std::unique_ptr<Server> server1_;
std::unique_ptr<Server> server2_;
ZookeeperTestServiceImpl service_;
zhandle_t* zookeeper_handle_;
string zookeeper_address_;
};
// Tests zookeeper state change between two RPCs
// TODO(ctiller): leaked objects in this test
TEST_F(ZookeeperTest, ZookeeperStateChangeTwoRpc) {
ResetStub();
// First RPC
EchoRequest request1;
EchoResponse response1;
ClientContext context1;
context1.set_authority("test");
request1.set_message("Hello");
Status s1 = stub_->Echo(&context1, request1, &response1);
EXPECT_EQ(response1.message(), request1.message());
EXPECT_TRUE(s1.ok());
// Zookeeper state changes
gpr_log(GPR_DEBUG, "Zookeeper state change");
ChangeZookeeperState();
// Waits for re-resolving addresses
// TODO(ctiller): RPC will probably fail if not waiting
sleep(1);
// Second RPC
EchoRequest request2;
EchoResponse response2;
ClientContext context2;
context2.set_authority("test");
request2.set_message("World");
Status s2 = stub_->Echo(&context2, request2, &response2);
EXPECT_EQ(response2.message(), request2.message());
EXPECT_TRUE(s2.ok());
}
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
grpc_test_init(argc, argv);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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