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https://issues.apache.org/jira/browse/AMQCPP-511
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197 changes: 197 additions & 0 deletions
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activemq-cpp/src/main/activemq/transport/discovery/http/HttpDiscoveryAgent.cpp
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License 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. | ||
| */ | ||
|
|
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| #include <activemq/transport/discovery/http/HttpDiscoveryAgent.h> | ||
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| #include <decaf/lang/Long.h> | ||
| #include <decaf/net/URI.h> | ||
| #include <decaf/util/HashSet.h> | ||
| #include <decaf/util/concurrent/Mutex.h> | ||
| #include <decaf/net/SocketFactory.h> | ||
| #include <decaf/net/Socket.h> | ||
| #include <decaf/io/InputStream.h> | ||
| #include <decaf/io/OutputStream.h> | ||
| #include <decaf/io/DataInputStream.h> | ||
| #include <decaf/io/DataOutputStream.h> | ||
| #include <decaf/io/BufferedInputStream.h> | ||
| #include <decaf/io/BufferedOutputStream.h> | ||
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| using namespace activemq; | ||
| using namespace activemq::util; | ||
| using namespace activemq::transport; | ||
| using namespace activemq::transport::discovery; | ||
| using namespace activemq::transport::discovery::http; | ||
| using namespace decaf; | ||
| using namespace decaf::io; | ||
| using namespace decaf::net; | ||
| using namespace decaf::lang; | ||
| using namespace decaf::lang::exceptions; | ||
| using namespace decaf::util; | ||
| using namespace decaf::util::concurrent; | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| namespace activemq { | ||
| namespace transport { | ||
| namespace discovery { | ||
| namespace http { | ||
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| enum UpdateState { | ||
| SUSPENDED, | ||
| RESUMING, | ||
| RESUMED | ||
| }; | ||
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| class HttpDiscoveryAgentImpl { | ||
| private: | ||
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| HttpDiscoveryAgentImpl(const HttpDiscoveryAgentImpl&); | ||
| HttpDiscoveryAgentImpl& operator= (const HttpDiscoveryAgentImpl&); | ||
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| public: | ||
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| UpdateState updateState; | ||
| Mutex updateLock; | ||
| long long updateInterval; | ||
| URI registryUrl; | ||
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| public: | ||
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| HttpDiscoveryAgentImpl() : updateState(RESUMED), | ||
| updateLock(), | ||
| updateInterval(10 * 1000), | ||
| registryUrl() { | ||
| } | ||
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| HashSet<std::string> doLookup() { | ||
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| HashSet<std::string> result; | ||
| try { | ||
| return result; | ||
| } catch (Exception& e) { | ||
| std::cout << "Caught exception: " << e.getMessage() << std::endl; | ||
| } | ||
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| return result; | ||
| } | ||
| }; | ||
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| }}}} | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| HttpDiscoveryAgent::HttpDiscoveryAgent() : AbstractDiscoveryAgent(), impl(new HttpDiscoveryAgentImpl) { | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| HttpDiscoveryAgent::~HttpDiscoveryAgent() { | ||
| try { | ||
| delete this->impl; | ||
| } | ||
| DECAF_CATCHALL_NOTHROW() | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| std::string HttpDiscoveryAgent::toString() const { | ||
| return "HttpDiscoveryAgent"; | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::suspend() { | ||
| synchronized(&impl->updateLock) { | ||
| impl->updateState = SUSPENDED; | ||
| } | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::resume() { | ||
| synchronized(&impl->updateLock) { | ||
| impl->updateState = RESUMING; | ||
| impl->updateLock.notify(); | ||
| } | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::doStart() { | ||
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| if (impl->registryUrl.toString().empty()) { | ||
| impl->registryUrl = getDiscoveryURI(); | ||
| } | ||
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| resume(); | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::doStop() { | ||
| suspend(); | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::doAdvertizeSelf() { | ||
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| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::setUpdateInterval(long long updateInterval) { | ||
| impl->updateInterval = updateInterval; | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
| long long HttpDiscoveryAgent::getUpdateInterval() const { | ||
| return impl->updateInterval; | ||
| } | ||
|
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::setRegistryURL(const std::string& registryUrl) { | ||
| impl->registryUrl.create(registryUrl); | ||
| } | ||
|
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| //////////////////////////////////////////////////////////////////////////////// | ||
| std::string HttpDiscoveryAgent::getRegistryURL() const{ | ||
| return impl->registryUrl.toString(); | ||
| } | ||
|
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::doDiscovery() { | ||
| try { | ||
| updateServices(); | ||
| synchronized(&impl->updateLock) { | ||
| do { | ||
| if (impl->updateState == RESUMING) { | ||
| impl->updateState = RESUMED; | ||
| } else { | ||
| impl->updateLock.wait(impl->updateInterval); | ||
| } | ||
| } while (impl->updateState == SUSPENDED && isStarted()); | ||
| } | ||
| } catch (InterruptedException& e) { | ||
| return; | ||
| } | ||
| } | ||
|
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| //////////////////////////////////////////////////////////////////////////////// | ||
| void HttpDiscoveryAgent::updateServices() { | ||
| DiscoveryListener* discoveryListener = getDiscoveryListener(); | ||
| if (discoveryListener != NULL) { | ||
| HashSet<std::string> activeServices = impl->doLookup(); | ||
| if (activeServices.isEmpty()) { | ||
| Pointer< Iterator<std::string> > discovered(activeServices.iterator()); | ||
| while (discovered->hasNext()) { | ||
| std::string service = discovered->next(); | ||
| processLiveService("", service); | ||
| } | ||
| } | ||
| } | ||
| } |
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