/// <summary>
/// Gets an application configuration tree for the particular named application on this host.
/// This method traverses the whole region catalog and calculates the effective configuration tree for this host -
/// the one that will get supplied into the application container process-wide.
///
/// The traversal is done in the following order: MetabaseRoot->Role->App->[Regions]->NOC->[Zones]->Host.
/// </summary>
/// <param name="appName">Metabase application name which should resolve in App catalog</param>
/// <param name="latest">Pass true to bypass the metabase cache on read so the config tree is recalculated</param>
public IConfigSectionNode GetEffectiveAppConfig(string appName, bool latest = false)
{
IConfigSectionNode result = null;
const string CACHE_TABLE = "EffectiveAppConfigs";
string CACHE_KEY = (this.RegionPath + "." + appName).ToLowerInvariant();
//1. Try to get from cache
if (!latest)
{
result = Metabank.cacheGet(CACHE_TABLE, CACHE_KEY) as IConfigSectionNode;
if (result != null)
{
return(result);
}
}
try
{
result = calculateEffectiveAppConfig(appName);
}
catch (Exception error)
{
throw new MetabaseException(StringConsts.METABASE_EFFECTIVE_APP_CONFIG_ERROR.Args(appName, RegionPath, error.ToMessageWithType()), error);
}
Metabank.cachePut(CACHE_TABLE, CACHE_KEY, result);
return(result);
}
/// <summary>
/// Gets host by name
/// </summary>
public SectionHost GetHost(string name)
{
string CACHE_KEY = ("ZN.h" + Path + name).ToLowerInvariant();
//1. Try to get from cache
var result = Metabank.cacheGet(REG_CATALOG, CACHE_KEY) as SectionHost;
if (result != null)
{
return(result);
}
var rdir = "{0}{1}".Args(name, RegCatalog.HST_EXT);
var rpath = Metabank.JoinPaths(Path, rdir);
result =
Metabank.fsAccess("Zone[{0}].GetHost({1})".Args(m_Name, name), rpath,
(session, dir) => new SectionHost(this, name, rpath, session)
);
Metabank.cachePut(REG_CATALOG, CACHE_KEY, result);
return(result);
}
/// <summary>
/// Gets the information for the best suitable binary packages on this host for the named app
/// </summary>
/// <param name="appName">Metabase application name which should resolve in App catalog</param>
public IEnumerable <SectionApplication.AppPackage> GetAppPackages(string appName)
{
const string CACHE_TABLE = "AppPackages";
string CACHE_KEY = (this.RegionPath + "." + appName).ToLowerInvariant();
//1. Try to get from cache
var result = Metabank.cacheGet(CACHE_TABLE, CACHE_KEY) as IEnumerable <SectionApplication.AppPackage>;
if (result != null)
{
return(result);
}
try
{
result = this.calculateAppPackages(appName);
}
catch (Exception error)
{
throw new MetabaseException(StringConsts.METABASE_APP_PACKAGES_ERROR.Args(appName, RegionPath, error.ToMessageWithType()), error);
}
Metabank.cachePut(CACHE_TABLE, CACHE_KEY, result);
return(result);
}
