Improved session and domain configuration elements

- added validators for some fields
- used default value from constant instead of literal
- fixed type of collection

Author: alex-kulakov

Orm/Xtensive.Orm/Orm/Configuration/Elements/DomainConfigurationElement.cs

@@ -245,7 +245,7 @@ public ConfigurationCollection<DatabaseConfigurationElement> Databases
     /// <see cref="DomainConfiguration.KeyGenerators" copy="true"/>
     /// </summary>
     [ConfigurationProperty(KeyGeneratorsElementName, IsDefaultCollection = false)]
-    [ConfigurationCollection(typeof (ConfigurationCollection<DatabaseConfigurationElement>), AddItemName = "keyGenerator")]
+    [ConfigurationCollection(typeof (ConfigurationCollection<KeyGeneratorConfigurationElement>), AddItemName = "keyGenerator")]
     public ConfigurationCollection<KeyGeneratorConfigurationElement> KeyGenerators
     {
       get { return (ConfigurationCollection<KeyGeneratorConfigurationElement>) this[KeyGeneratorsElementName]; }
@@ -295,7 +295,8 @@ public bool IncludeSqlInExceptions
     /// <summary>
     /// <see cref="DomainConfiguration.AllowCyclicDatabaseDependencies" copy="true"/>
     /// </summary>
-    [ConfigurationProperty(AllowCyclicDatabaseDependenciesElementName, DefaultValue = false)]
+    [ConfigurationProperty(AllowCyclicDatabaseDependenciesElementName,
+      DefaultValue = DomainConfiguration.DefaultAllowCyclicDatabaseDependencies)]
     public bool AllowCyclicDatabaseDependencies
     {
       get { return (bool) this[AllowCyclicDatabaseDependenciesElementName]; }

Orm/Xtensive.Orm/Orm/Configuration/Elements/SessionConfigurationElement.cs

@@ -68,6 +68,7 @@ public string Password {
     /// </summary>
     [ConfigurationProperty(CacheSizeElementName,
       DefaultValue = SessionConfiguration.DefaultCacheSize)]
+    [IntegerValidator(MinValue = 1, MaxValue = int.MaxValue)]
     public int CacheSize {
       get { return (int) this[CacheSizeElementName]; }
       set { this[CacheSizeElementName] = value; }
@@ -114,6 +115,7 @@ public int? DefaultCommandTimeout {
     /// </summary>
     [ConfigurationProperty(BatchSizeElementName,
       DefaultValue = SessionConfiguration.DefaultBatchSize)]
+    [IntegerValidator(MinValue = 1, MaxValue = int.MaxValue)]
     public int BatchSize {
       get { return (int) this[BatchSizeElementName]; }
       set { this[BatchSizeElementName] = value; }
@@ -142,6 +144,7 @@ public string ServiceContainerType {
     /// </summary>
     [ConfigurationProperty(EntityChangeRegistrySizeElementName,
       DefaultValue = SessionConfiguration.DefaultEntityChangeRegistrySize)]
+    [IntegerValidator(MinValue = 1, MaxValue = int.MaxValue)]
     public int EntityChangeRegistrySize {
       get { return (int) this[EntityChangeRegistrySizeElementName]; }
       set { this[EntityChangeRegistrySizeElementName] = value; }