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Diffstat (limited to 'examples/tips/subscriber.cc')
-rw-r--r-- | examples/tips/subscriber.cc | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/examples/tips/subscriber.cc b/examples/tips/subscriber.cc new file mode 100644 index 0000000000..c0673223ae --- /dev/null +++ b/examples/tips/subscriber.cc @@ -0,0 +1,118 @@ +/* + * + * Copyright 2014, 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++/client_context.h> + +#include "examples/tips/subscriber.h" + +using tech::pubsub::Topic; +using tech::pubsub::DeleteTopicRequest; +using tech::pubsub::GetTopicRequest; +using tech::pubsub::SubscriberService; +using tech::pubsub::ListTopicsRequest; +using tech::pubsub::ListTopicsResponse; +using tech::pubsub::PublishRequest; +using tech::pubsub::PubsubMessage; + +namespace grpc { +namespace examples { +namespace tips { + +Subscriber::Subscriber(std::shared_ptr<ChannelInterface> channel) + : stub_(SubscriberService::NewStub(channel)) { +} + +void Subscriber::Shutdown() { + stub_.reset(); +} + +Status Subscriber::CreateSubscription(const grpc::string& topic, + const grpc::string& name) { + tech::pubsub::Subscription request; + tech::pubsub::Subscription response; + ClientContext context; + + request.set_topic(topic); + request.set_name(name); + + return stub_->CreateSubscription(&context, request, &response); +} + +Status Subscriber::GetSubscription(const grpc::string& name, + grpc::string* topic) { + tech::pubsub::GetSubscriptionRequest request; + tech::pubsub::Subscription response; + ClientContext context; + + request.set_subscription(name); + + Status s = stub_->GetSubscription(&context, request, &response); + *topic = response.topic(); + return s; +} + +Status Subscriber::DeleteSubscription(const grpc::string& name) { + tech::pubsub::DeleteSubscriptionRequest request; + proto2::Empty response; + ClientContext context; + + request.set_subscription(name); + + return stub_->DeleteSubscription(&context, request, &response); +} + +Status Subscriber::Pull(const grpc::string& name, grpc::string* data) { + tech::pubsub::PullRequest request; + tech::pubsub::PullResponse response; + ClientContext context; + + request.set_subscription(name); + Status s = stub_->Pull(&context, request, &response); + if (s.IsOk()) { + tech::pubsub::PubsubEvent event = response.pubsub_event(); + if (event.has_message()) { + *data = event.message().data(); + } + tech::pubsub::AcknowledgeRequest ack; + proto2::Empty empty; + ClientContext ack_context; + ack.set_subscription(name); + ack.add_ack_id(response.ack_id()); + stub_->Acknowledge(&ack_context, ack, &empty); + } + return s; +} + +} // namespace tips +} // namespace examples +} // namespace grpc |