Fixes RePublishAll method to ensure it performs the same function as the legacy Document.RePublishAll - it just

re-generates the XML in the cmsContentXml table. Updates the Sql providers to support truncate table. Updates the RepublishAll
unit test. Adds a TruncateTable extension to PetaPoco. Adds locking to certain service methods that perform more than once function.

src/Umbraco.Core/Persistence/SqlSyntax/ISqlSyntaxProvider.cs

@@ -31,6 +31,7 @@ namespace Umbraco.Core.Persistence.SqlSyntax
         string InsertData { get; }
         string UpdateData { get; }
         string DeleteData { get; }
+        string TruncateTable { get; }
         string CreateConstraint { get; }
         string DeleteConstraint { get; }
         string CreateForeignKeyConstraint { get; }

src/Umbraco.Core/Persistence/SqlSyntax/SqlCeSyntaxProvider.cs

@@ -42,6 +42,14 @@ namespace Umbraco.Core.Persistence.SqlSyntax
             return false;
         }
 
+        /// <summary>
+        /// SqlCe doesn't support the Truncate Table syntax, so we just have to do a DELETE FROM which is slower but we have no choice.
+        /// </summary>
+        public override string TruncateTable
+        {
+            get { return "DELETE FROM {0}"; }
+        }
+
         public override string GetIndexType(IndexTypes indexTypes)
         {
             string indexType;

src/Umbraco.Core/Persistence/SqlSyntax/SqlSyntaxProviderBase.cs

@@ -436,6 +436,7 @@ namespace Umbraco.Core.Persistence.SqlSyntax
         public virtual string InsertData { get { return "INSERT INTO {0} ({1}) VALUES ({2})"; } }
         public virtual string UpdateData { get { return "UPDATE {0} SET {1} WHERE {2}"; } }
         public virtual string DeleteData { get { return "DELETE FROM {0} WHERE {1}"; } }
+        public virtual string TruncateTable { get { return "TRUNCATE TABLE {0}"; } }
 
         public virtual string CreateConstraint { get { return "ALTER TABLE {0} ADD CONSTRAINT {1} {2} ({3})"; } }
         public virtual string DeleteConstraint { get { return "ALTER TABLE {0} DROP CONSTRAINT {1}"; } }