public bool GetRemotePeerStatus(IPAddress ip, int port)
{
if (ip == null)
{
throw new ArgumentNullException("ip");
}
return(GetRemotePeerStatus(PeerNode.Create(ip, port, 0)));
}
public bool GetRemotePeerStatus(PeerNode peer)
{
if (peer == null)
{
throw new ArgumentNullException("peer");
}
var peerInfo = GetRemoteAgentInfos <IPeerCommunicationAgent>().FirstOrDefault(info => info.PeerNode == peer);
return(peerInfo == null ? false : peerInfo.IsReachable);
}
public bool Equals(PeerNode other)
{
if (other == null)
{
return(false);
}
else
{
return(this.Host == other.Host && this.Port == other.Port);
}
}
public string GetAgentId(PeerNode peer, string agentName)
{
if (peer == null)
{
throw new ArgumentNullException("peer");
}
if (string.IsNullOrEmpty(agentName))
{
throw new ArgumentNullException("agentName");
}
return(string.Format("{0}:{1} - {2}", peer.Host, peer.Port, agentName));
}
private Uri GetAgentUri(PeerNode peer, string agentId)
{
if (peer == null)
{
throw new ArgumentNullException("peer");
}
if (string.IsNullOrEmpty(agentId))
{
throw new ArgumentNullException("agentId");
}
return(new Uri(string.Format("{0}://{1}:{2}/{3}/", Uri.UriSchemeNetTcp, peer.Host, peer.Port, agentId)));
}
internal RemoteAgentInformation(PeerNode peerNode, string agentId, AgentDisplayData displayData, IEnumerable <string> contracts, bool isInternal, ServiceClientFactory serviceClientFactory)
: base(peerNode, agentId, contracts, isInternal)
{
if (displayData == null)
{
throw new ArgumentNullException("displayData");
}
if (serviceClientFactory == null)
{
throw new ArgumentNullException("serviceClientFactory");
}
_displayData = displayData;
this.ServiceClientFactory = serviceClientFactory;
}
private void RegisterPeer(PeerNode peer)
{
if (peer == null)
{
throw new ArgumentNullException("peer");
}
var peerAgentId = GetAgentId(peer, PeerCommunicationAgent.Configuration.Name);
var peerAgentInfo = GetOrRegisterRemoteAgent(
peer,
peerAgentId,
new AgentDisplayData(PeerCommunicationAgent.Configuration.Name, PeerCommunicationAgent.Configuration.ShortName, PeerCommunicationAgent.Configuration.Description),
new[] { typeof(IPeerCommunicationAgent).AssemblyQualifiedName, typeof(IAgent).AssemblyQualifiedName },
isInternal: true,
forceRegister: true);
// broadcast new peer communication agent, sending connection state immediately to the remote peer
_agentSubject.OnNext(new SerializableAgentInformation(peerAgentInfo));
}
internal LocalAgentInformation(PeerNode peerNode, string agentId, AgentConfiguration configuration, IEnumerable <string> contracts, bool isInternal, IAgent agent, ServiceHost serviceHost)
: base(peerNode, agentId, contracts, isInternal)
{
if (agent == null)
{
throw new ArgumentNullException("agent");
}
if (configuration == null)
{
throw new ArgumentNullException("configuration");
}
if (serviceHost == null)
{
throw new ArgumentNullException("serviceHost");
}
this.Configuration = configuration;
this.Agent = agent;
this.ServiceHost = serviceHost;
}
internal AgentInformation(PeerNode peer, string agentId, IEnumerable <string> contracts, bool isInternal)
{
if (peer == null)
{
throw new ArgumentNullException("peer");
}
if (string.IsNullOrEmpty(agentId))
{
throw new ArgumentNullException("agentId");
}
if (contracts == null)
{
throw new ArgumentNullException("contracts");
}
this.PeerNode = peer;
this.AgentId = agentId;
this.Contracts = contracts.Distinct().ToArray();
this.IsInternal = isInternal;
}
private RemoteAgentInformation GetOrRegisterRemoteAgent(PeerNode peer, string agentId, AgentDisplayData displayData, IEnumerable <string> contracts, bool isInternal, bool forceRegister = false)
{
if (peer == null)
{
throw new ArgumentNullException("peer");
}
if (string.IsNullOrEmpty(agentId))
{
throw new ArgumentNullException("agentId");
}
if (displayData == null)
{
throw new ArgumentNullException("displayData");
}
if (contracts == null)
{
throw new ArgumentNullException("contracts");
}
var newLazyRemote = new Lazy <RemoteAgentInformation>(
() =>
{
var serviceClientFactory = new ServiceClientFactory(GetAgentUri(peer, agentId));
return(new RemoteAgentInformation(peer, agentId, displayData, contracts, isInternal, serviceClientFactory));
});
Lazy <RemoteAgentInformation> lazyRemote;
if (!forceRegister)
{
lazyRemote = _remoteAgents.GetOrAdd(agentId, newLazyRemote);
}
else
{
lazyRemote = _remoteAgents.AddOrUpdate(agentId, newLazyRemote, (id, old) => newLazyRemote);
}
// do not broadcast agent immediately, it will be done on next heartbeat (see StartHeartbeat)
return(lazyRemote.Value);
}
public async Task <bool> GetRemotePeerStatus(string host, int port)
{
var peerNode = await PeerNode.Create(host, port, 0).ConfigureAwait(false);
return(GetRemotePeerStatus(peerNode));
}
public Task Start()
{
if (this.State != ServiceState.Stopped)
{
throw new InvalidOperationException("Another instance of this service is already executing.");
}
if (this.Configuration == null)
{
throw new InvalidOperationException("The service must first be configured by calling LoadConfiguration.");
}
return(Task.Run(
async() =>
{
_stateSubject.OnNext(ServiceState.Starting);
// initial setup
// see https://stackoverflow.com/questions/2977630/wcf-instance-already-exists-in-counterset-error-when-reopening-servicehost
GC.Collect();
GC.WaitForPendingFinalizers();
_localAgents.Clear();
_remoteAgents.Clear();
WcfFactory.BindingListenBacklog = this.Configuration.WcfBindingListenBacklog;
WcfFactory.BindingMaxConnections = this.Configuration.WcfBindingMaxConnections;
WcfFactory.BehaviorMaxConcurrentCalls = this.Configuration.WcfBehaviorMaxConcurrentCalls;
WcfFactory.BehaviorMaxConcurrentSessions = this.Configuration.WcfBehaviorMaxConcurrentSessions;
WcfFactory.BehaviorMaxConcurrentInstances = this.Configuration.WcfBehaviorMaxConcurrentInstances;
this.MinOperationRetryDelay = TimeSpan.FromMilliseconds(this.Configuration.MinOperationRetryDelayInMs);
this.MaxOperationRetryDelay = TimeSpan.FromMilliseconds(this.Configuration.MaxOperationRetryDelayInMs);
foreach (var folder in this.Configuration.DependencyFolders)
{
_dependencyFolders.Add(folder);
}
// create local peer
this.LocalPeerNode = await PeerNode.Create(this.Configuration.Host, this.Configuration.Port, this.Configuration.RxPort, this.Configuration.Description).ConfigureAwait(false);
Log.Debug().Message("Adresse assignée au AgentBroker: '{0}'.", this.LocalPeerNode).Write();
_nextRxPort = this.Configuration.RxPort;
// peers and agents creation
// create local PeerCommunicationAgent
var peerAgentInfo = await GetOrRegisterLocalAgent(PeerCommunicationAgent.Configuration, isInternal: true, forceRegister: true).ConfigureAwait(false);
// create local agents
await Task.WhenAll(
this.Configuration.Agents
.Where(agentConfig => agentConfig.Enabled)
.Select(agentConfig => GetOrRegisterLocalAgent(agentConfig, isInternal: false, forceRegister: true))).ConfigureAwait(false);
// activate internal agents
await Task.WhenAll(GetLocalAgentInfos <IAgent>().Where(a => a.IsInternal).Select(a => a.Agent.Activate())).ConfigureAwait(false);
// get remote peers list
var remotePeers =
(
await Task.WhenAll(
this.Configuration.Peers
.Where(p => p.Enabled)
.Select(p => PeerNode.Create(p.Host, p.Port, p.RxPort, p.Description)))
.ConfigureAwait(false)
).AsEnumerable();
// filter out this multiagent from the configuration's peer list by comparing their IP and port (host is resolved if required)
// note that == and != operators are NOT overloaded by IPAddress, the Equals method must be used instead
remotePeers = remotePeers
.Where(p =>
p.Port != this.LocalPeerNode.Port ||
!p.Host.Equals(this.LocalPeerNode.Host));
// create remote peers
foreach (var peer in remotePeers)
{
RegisterPeer(peer);
}
_heartbeatCts = new CancellationTokenSource();
_heartbeatTask = StartHeartbeat(_heartbeatCts.Token);
_stateSubject.OnNext(ServiceState.Started);
// activate all local agents if requested
// must be done AFTER service state transition to Started because ObserveXXX are active only when the service is started
if (this.Configuration.AutoActivateAgents)
{
await Task.WhenAll(GetLocalAgentInfos <IAgent>().Select(a => a.Agent.Activate())).ConfigureAwait(false);
}
})
.ContinueWith(
async t =>
{
if (t.IsCanceled)
{
throw (Exception)t.Exception ?? new OperationCanceledException();
}
else if (t.IsFaulted)
{
await Stop(true).ConfigureAwait(false);
throw t.Exception;
}
})
.Unwrap());
}
