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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.
*
*/
#ifndef GRPCXX_SERVER_BUILDER_H
#define GRPCXX_SERVER_BUILDER_H
#include <map>
#include <memory>
#include <vector>
#include <grpc++/impl/server_builder_option.h>
#include <grpc++/impl/server_builder_plugin.h>
#include <grpc++/support/config.h>
#include <grpc/compression.h>
namespace grpc {
class AsyncGenericService;
class CompletionQueue;
class RpcService;
class Server;
class ServerCompletionQueue;
class ServerCredentials;
class Service;
namespace testing {
class ServerBuilderPluginTest;
} // namespace testing
/// A builder class for the creation and startup of \a grpc::Server instances.
class ServerBuilder {
public:
ServerBuilder();
/// Register a service. This call does not take ownership of the service.
/// The service must exist for the lifetime of the \a Server instance returned
/// by \a BuildAndStart().
/// Matches requests with any :authority
ServerBuilder& RegisterService(Service* service);
/// Register a generic service.
/// Matches requests with any :authority
ServerBuilder& RegisterAsyncGenericService(AsyncGenericService* service);
/// Register a service. This call does not take ownership of the service.
/// The service must exist for the lifetime of the \a Server instance returned
/// by BuildAndStart().
/// Only matches requests with :authority \a host
ServerBuilder& RegisterService(const grpc::string& host, Service* service);
/// Set max message size in bytes.
ServerBuilder& SetMaxMessageSize(int max_message_size) {
max_message_size_ = max_message_size;
return *this;
}
/// Set the support status for compression algorithms. All algorithms are
/// enabled by default.
///
/// Incoming calls compressed with an unsupported algorithm will fail with
/// GRPC_STATUS_UNIMPLEMENTED.
ServerBuilder& SetCompressionAlgorithmSupportStatus(
grpc_compression_algorithm algorithm, bool enabled);
/// The default compression level to use for all channel calls in the
/// absence of a call-specific level.
ServerBuilder& SetDefaultCompressionLevel(grpc_compression_level level);
/// The default compression algorithm to use for all channel calls in the
/// absence of a call-specific level. Note that it overrides any compression
/// level set by \a SetDefaultCompressionLevel.
ServerBuilder& SetDefaultCompressionAlgorithm(
grpc_compression_algorithm algorithm);
ServerBuilder& SetOption(std::unique_ptr<ServerBuilderOption> option);
/// Tries to bind \a server to the given \a addr.
///
/// It can be invoked multiple times.
///
/// \param addr The address to try to bind to the server (eg, localhost:1234,
/// 192.168.1.1:31416, [::1]:27182, etc.).
/// \params creds The credentials associated with the server.
/// \param selected_port[out] Upon success, updated to contain the port
/// number. \a nullptr otherwise.
///
// TODO(dgq): the "port" part seems to be a misnomer.
ServerBuilder& AddListeningPort(const grpc::string& addr,
std::shared_ptr<ServerCredentials> creds,
int* selected_port = nullptr);
/// Add a completion queue for handling asynchronous services.
///
/// Caller is required to shutdown the server prior to shutting down the
/// returned completion queue. A typical usage scenario:
///
/// // While building the server:
/// ServerBuilder builder;
/// ...
/// cq_ = builder.AddCompletionQueue();
/// server_ = builder.BuildAndStart();
///
/// // While shutting down the server;
/// server_->Shutdown();
/// cq_->Shutdown(); // Always *after* the associated server's Shutdown()!
///
/// \param is_frequently_polled This is an optional parameter to inform GRPC
/// library about whether this completion queue would be frequently polled
/// (i.e by calling Next() or AsyncNext()). The default value is 'true' and is
/// the recommended setting. Setting this to 'false' (i.e not polling the
/// completion queue frequently) will have a significantly negative
/// performance impact and hence should not be used in production use cases.
std::unique_ptr<ServerCompletionQueue> AddCompletionQueue(
bool is_frequently_polled = true);
/// Return a running server which is ready for processing calls.
std::unique_ptr<Server> BuildAndStart();
/// For internal use only: Register a ServerBuilderPlugin factory function.
static void InternalAddPluginFactory(
std::unique_ptr<ServerBuilderPlugin> (*CreatePlugin)());
private:
friend class ::grpc::testing::ServerBuilderPluginTest;
struct Port {
grpc::string addr;
std::shared_ptr<ServerCredentials> creds;
int* selected_port;
};
typedef std::unique_ptr<grpc::string> HostString;
struct NamedService {
explicit NamedService(Service* s) : service(s) {}
NamedService(const grpc::string& h, Service* s)
: host(new grpc::string(h)), service(s) {}
HostString host;
Service* service;
};
int max_message_size_;
std::vector<std::unique_ptr<ServerBuilderOption>> options_;
std::vector<std::unique_ptr<NamedService>> services_;
std::vector<Port> ports_;
std::vector<ServerCompletionQueue*> cqs_;
std::shared_ptr<ServerCredentials> creds_;
std::vector<std::unique_ptr<ServerBuilderPlugin>> plugins_;
AsyncGenericService* generic_service_;
struct {
bool is_set;
grpc_compression_level level;
} maybe_default_compression_level_;
struct {
bool is_set;
grpc_compression_algorithm algorithm;
} maybe_default_compression_algorithm_;
uint32_t enabled_compression_algorithms_bitset_;
};
} // namespace grpc
#endif // GRPCXX_SERVER_BUILDER_H
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