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/*
* Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0/
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "capabilities/CapabilityMessagingService.h"
#include "capabilities/core/include/PublisherForwarder.h"
#include "capabilities/core/include/SubscriberForwarder.h"
static string TAG = "vshl::capabilities::CapabilityMessagingService";
using Level = vshl::common::interfaces::ILogger::Level;
namespace vshl {
namespace capabilities {
// Create a CapabilityMessagingService.
unique_ptr<CapabilityMessagingService> CapabilityMessagingService::create(
shared_ptr<vshl::common::interfaces::ILogger> logger,
shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) {
if (logger == nullptr) {
return nullptr;
}
if (afbApi == nullptr) {
logger->log(Level::ERROR, TAG, "Failed to create CapabilityMessagingService: AFB API null");
return nullptr;
}
auto capabilityMessageService =
std::unique_ptr<CapabilityMessagingService>(new CapabilityMessagingService(logger, afbApi));
return capabilityMessageService;
}
CapabilityMessagingService::~CapabilityMessagingService() {
mMessageChannelsMap.clear();
}
CapabilityMessagingService::CapabilityMessagingService(
shared_ptr<vshl::common::interfaces::ILogger> logger,
shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) :
mAfbApi(afbApi),
mLogger(logger) {
}
// Subscribe to capability specific messages.
bool CapabilityMessagingService::subscribe(
vshl::common::interfaces::IAFBRequest& request,
shared_ptr<common::interfaces::ICapability> capability,
const string action) {
auto capabilityName = capability->getName();
if (capabilityName.empty()) {
mLogger->log(Level::ERROR, TAG, "Failed to subscribe to message. Invalid input.");
return false;
}
auto messageChannel = getMessageChannel(capability);
return messageChannel->subscribe(request, action);
}
// Publish capability messages.
bool CapabilityMessagingService::publish(
shared_ptr<common::interfaces::ICapability> capability,
const string action,
const string payload) {
auto capabilityName = capability->getName();
if (capabilityName.empty()) {
mLogger->log(Level::ERROR, TAG, "Failed to publish message. Invalid input.");
return false;
}
auto messageChannelIt = mMessageChannelsMap.find(capabilityName);
if (messageChannelIt == mMessageChannelsMap.end()) {
mLogger->log(
Level::ERROR,
TAG,
"Failed to publish message. Message channel doesn't exist for capability " + capabilityName);
return false;
}
return messageChannelIt->second->publish(action, payload);
}
shared_ptr<vshl::capabilities::core::MessageChannel> CapabilityMessagingService::getMessageChannel(
shared_ptr<common::interfaces::ICapability> capability) {
auto capabilityName = capability->getName();
if (capabilityName.empty()) {
mLogger->log(Level::ERROR, TAG, "Failed to create message channel. Invalid input.");
return nullptr;
}
auto messageChannelIt = mMessageChannelsMap.find(capabilityName);
if (messageChannelIt == mMessageChannelsMap.end()) {
mLogger->log(Level::INFO, TAG, "Creating new message channel for capability: " + capabilityName);
auto messageChannel = vshl::capabilities::core::MessageChannel::create(mLogger, mAfbApi, capability);
mMessageChannelsMap.insert(make_pair(capabilityName, messageChannel));
return messageChannel;
}
return messageChannelIt->second;
}
} // namespace capabilities
} // namespace vshl
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