/// <summary>
/// Process system configuration initialisation
/// This will parse the configuration text, you should call this
/// function from within Application_BeginRequest of Global.asax. It can run multiple times, once the config
/// has loaded the system won't re-load the config until you call ProcessConfig.unload() followed by
/// ProcessConfig.initialiseFileSystem(...), so it's safe to not surround it with ifs.
///
/// NOTE: If a cluster is specified in the cluster.conf and its 'node-name' matches nodeName, then those settings
/// will be used to connect to the cluster. This allows for different staging environments to be setup.
/// </summary>
/// <param name="nodeName">If a cluster is specified in the cluster.conf and its 'node-name' matches nodeName, then
/// those settings will be used to connect to the cluster. This allows for different staging environments to be
/// setup.</param>
/// <param name="setup">A setup function to call on successful loading of the configuration files - this will
/// happen once only.</param>
/// <param name="strategyFuncs">Plugin extra strategy behaviours by passing in a list of FuncSpecs.</param>
public static AppProfile initialise(string configText, Option <string> nodeName, Action <AppProfile> setup = null, IEnumerable <FuncSpec> strategyFuncs = null)
{
if (appProfile != null)
{
return(appProfile);
}
lock (sync)
{
if (appProfile != null)
{
return(appProfile);
}
config = new ProcessSystemConfig(nodeName.IfNone(""), strategyFuncs);
config.ParseConfigText(configText);
appProfile = AppProfile.NonClustered;
nodeName.Iter(node =>
{
var provider = config.GetClusterSetting("provider", "value", "redis");
var role = config.GetClusterSetting("role", "value", name => clusterSettingMissing <string>(name));
var clusterConn = config.GetClusterSetting("connection", "value", "localhost");
var clusterDb = config.GetClusterSetting("database", "value", "0");
var env = config.GetClusterSetting <string>("env", "value");
var userEnv = config.GetClusterSetting <string>("user-env", "value");
appProfile = new AppProfile(
node,
role,
clusterConn,
clusterDb,
env,
userEnv
);
Cluster.connect(provider, node, clusterConn, clusterDb, role);
});
config.PostConnect();
setup(appProfile);
return(appProfile);
}
}
private static void StartFromConfig(ProcessSystemConfig config)
{
lock (sync)
{
InitLocalScheduler();
config.Cluster.Match(
Some: _ =>
{
// Extract cluster settings
var provider = config.GetClusterSetting("provider", "value", "redis");
var role = config.GetClusterSetting("role", "value", name => clusterSettingMissing <string>(name));
var clusterConn = config.GetClusterSetting("connection", "value", "localhost");
var clusterDb = config.GetClusterSetting("database", "value", "0");
var env = config.SystemName;
var userEnv = config.GetClusterSetting <string>("user-env", "value");
var appProfile = new AppProfile(
config.NodeName,
role,
clusterConn,
clusterDb,
env,
userEnv
);
// Look for an existing actor-system with the same system name
var current = ActorContext.Systems.Filter(c => c.Value == env).HeadOrNone();
// Work out if something significant has changed that will cause us to restart
var restart = current.Map(ActorContext.System)
.Map(c => c.AppProfile.NodeName != appProfile.NodeName ||
c.AppProfile.Role != appProfile.Role ||
c.AppProfile.ClusterConn != appProfile.ClusterConn ||
c.AppProfile.ClusterDb != appProfile.ClusterDb);
// Either restart / update settings / or start new
restart.Match(
Some: r =>
{
if (r)
{
// Restart
try
{
ActorContext.StopSystem(env);
}
catch (Exception e)
{
logErr(e);
}
StartFromConfig(config);
}
else
{
// Update settings
ActorContext.System(env).UpdateSettings(config, appProfile);
var cluster = from systm in current.Map(ActorContext.System)
from clstr in systm.Cluster
select clstr;
}
},
None: () =>
{
// Start new
ICluster cluster = Cluster.connect(
provider,
config.NodeName,
clusterConn,
clusterDb,
role
);
ActorContext.StartSystem(env, Optional(cluster), appProfile, config);
config.PostConnect();
});
},
None: () =>
{
ActorContext.StartSystem(new SystemName(""), None, AppProfile.NonClustered, config);
});
}
}
