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/*
*
* Copyright 2015-2016, 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 <memory>
#include <grpc++/client_context.h>
#include <grpc++/completion_queue.h>
#include <grpc++/impl/call.h>
#include <grpc++/impl/codegen/completion_queue_tag.h>
#include <grpc++/impl/grpc_library.h>
#include <grpc++/impl/rpc_method.h>
#include <grpc++/security/credentials.h>
#include <grpc++/support/channel_arguments.h>
#include <grpc++/support/config.h>
#include <grpc++/support/status.h>
#include <grpc++/support/time.h>
#include <grpc/grpc.h>
#include <grpc/support/log.h>
#include <grpc/support/slice.h>
#include "src/core/profiling/timers.h"
namespace grpc {
static internal::GrpcLibraryInitializer g_gli_initializer;
Channel::Channel(const grpc::string& host, grpc_channel* channel)
: host_(host), c_channel_(channel) {
g_gli_initializer.summon();
}
Channel::~Channel() { grpc_channel_destroy(c_channel_); }
Call Channel::CreateCall(const RpcMethod& method, ClientContext* context,
CompletionQueue* cq) {
const bool kRegistered = method.channel_tag() && context->authority().empty();
grpc_call* c_call = NULL;
if (kRegistered) {
c_call = grpc_channel_create_registered_call(
c_channel_, context->propagate_from_call_,
context->propagation_options_.c_bitmask(), cq->cq(),
method.channel_tag(), context->raw_deadline(), nullptr);
} else {
const char* host_str = NULL;
if (!context->authority().empty()) {
host_str = context->authority_.c_str();
} else if (!host_.empty()) {
host_str = host_.c_str();
}
c_call = grpc_channel_create_call(c_channel_, context->propagate_from_call_,
context->propagation_options_.c_bitmask(),
cq->cq(), method.name(), host_str,
context->raw_deadline(), nullptr);
}
grpc_census_call_set_context(c_call, context->census_context());
context->set_call(c_call, shared_from_this());
return Call(c_call, this, cq);
}
void Channel::PerformOpsOnCall(CallOpSetInterface* ops, Call* call) {
static const size_t MAX_OPS = 8;
size_t nops = 0;
grpc_op cops[MAX_OPS];
ops->FillOps(cops, &nops);
GPR_ASSERT(GRPC_CALL_OK ==
grpc_call_start_batch(call->call(), cops, nops, ops, nullptr));
}
void* Channel::RegisterMethod(const char* method) {
return grpc_channel_register_call(
c_channel_, method, host_.empty() ? NULL : host_.c_str(), nullptr);
}
grpc_connectivity_state Channel::GetState(bool try_to_connect) {
return grpc_channel_check_connectivity_state(c_channel_, try_to_connect);
}
namespace {
class TagSaver GRPC_FINAL : public CompletionQueueTag {
public:
explicit TagSaver(void* tag) : tag_(tag) {}
~TagSaver() GRPC_OVERRIDE {}
bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE {
*tag = tag_;
delete this;
return true;
}
private:
void* tag_;
};
} // namespace
void Channel::NotifyOnStateChangeImpl(grpc_connectivity_state last_observed,
gpr_timespec deadline,
CompletionQueue* cq, void* tag) {
TagSaver* tag_saver = new TagSaver(tag);
grpc_channel_watch_connectivity_state(c_channel_, last_observed, deadline,
cq->cq(), tag_saver);
}
bool Channel::WaitForStateChangeImpl(grpc_connectivity_state last_observed,
gpr_timespec deadline) {
CompletionQueue cq;
bool ok = false;
void* tag = NULL;
NotifyOnStateChangeImpl(last_observed, deadline, &cq, NULL);
cq.Next(&tag, &ok);
GPR_ASSERT(tag == NULL);
return ok;
}
} // namespace grpc
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