Norm

Ultra fast multi threads/tasks .Net Database framework.

Features

Norm is stands for Not an ORM is a C# lib for very HIGH Speed DB data processing in async way with immediately operations and at background with Processing data with Batches. It at least 10 times faster then EF/EF.Core. In Comparison to ORMs Norm has following disadvantages:

1. No object tracking
2. No Lazy loading properties

But it gives us the following:

1. Read spead is fast (10000 rows select from 100000 rows Mysql database ~100-200 ms)

Table size (rows)	Rows to select	Time, ms
100k	10k	154
100k	10k in a middle	190
100k	100k	1114
1M	100k	1135
1M	500k	5624

1. Insert speed is fast (10000 rows ~ 600 ms, 100000 rows ~ 3000-5000 ms on i5 CPU for MySql 8.0.23 with default settings)

Rows to insert	Time, ms
100	13
1000	62
10000	549
100000	5111

1. Can work with DB in multiple threads unlike do all ORMs
2. Support BULK operations
3. Can synchronize data in background (for quite big operations, truly async behavior)
4. Can be used in CQRS approach because works in own thread and uses multiple tasks.
5. All modification operations (Create, Update and Delete) are using DB Transactions.

How to use

Norm works with persistant entities (table mapping or aggregate to multiple tables) via Repository interface IDbRepository<T> (T is a generic type of persistant object, i.e. User). Norm has following implementation of IDbRepository<T> interface:

1. MySqlBufferedRepository<T> for MySql DB server, it implements BufferedDbRepository<T>
2. SqlServerBufferedRepository<T> for SqlServer DB server, it implements BufferedDbRepository<T>
3. ` PostgresBufferedRepository` for `Postgres` DB server, it implements `BufferedDbRepository`
4. SqLiteBufferedRepository<T> for SqLite DB server, it implements BufferedDbRepository<T>

Consider how to use it on MySql Db:

1. Add the appropriate package; see the section below
2. Create a IDbRepository<T> instance as follows:

    DbRepositorySettings dbRepositorySettings = new DbRepositorySettings()
    {
        BufferThreshold = 100,
        CommandTimeout = 120,
        BufferSynchronizationDelayTimeout = 100,
        ForceSynchronizationBufferDelay = 500
    };
    IDbRepository<PhysicalValueEntity> repo = new MySqlBufferedRepository<PhysicalValueEntity>(ConnectionString, dbRepositorySettings,
                                                                                               new PhysicalValueQueryBuilder(),
                                                                                               PhysicalValueFactory.Create, new NullLoggerFactory());
   

Contructor expect following params:

• DB connection string
• Repository settings:
  • BufferThreshold size of buffer (creainge or updainge entities) to sync
  • Timeout of executing command in seconds
  • BufferSynchronizationDelayTimeout time in ms between background synchronization iterations attempts
  • ForceSynchronizationBufferDelay timeout for sync if amount of items to create/update < BufferThreshold
• query builder that implements interface IDbEntityQueryBuilder<TE> (see example in tests)
• factory that builds Entity from array of column values (see also tests)
• logger factory

1. Read Entities 3.1 Without filtering

   IList<PhysicalValueEntity> items = await repo.GetManyAsync(page, size, new List<WhereParameter>(), null);
   

   3.2 With filtering

      IList<PhysicalValueEntity> items = await repo.GetManyAsync(page, size, new List<WhereParameter>()
      {
      new WhereParameter("id", null, false, WhereComparison.Greater, new List<object>(){lowerIdValue}, false),
      new WhereParameter("id", WhereJoinCondition.And, false, WhereComparison.Less, new List<object>(){upperIdValue}, false)
      }, null);
   

2. Create Entity 4.1 Single

    PhysicalValueEntity entity = new PhysicalValueEntity()
    {
        Id = id,
        Name = "new phys value",
        Description = "new phys value",
        Designation = "NPV"
     };
     bool result = await repo.InsertAsync(entity, true);
   

   The last insert method param is responsible for inserting into the Repository task in the background if false or immediately if true 4.2 Bulk

    IList<PhysicalValueEntity> newPhysValues = new List<PhysicalValueEntity>()
    {
        new PhysicalValueEntity()
        {
            Id = 30,
            Name = "new phys value",
            Description = "new phys value",
            Designation = "NPV"
         },
         new PhysicalValueEntity()
         {
             Id = 31,
             Name = "new phys value2",
             Description = "new phys value2",
             Designation = "NPV2"
          },
          new PhysicalValueEntity()
          {
              Id = 32,
              Name = "new phys value3",
              Description = "new phys value3",
              Designation = "NPV3"
          }
     };
     int result = await repo.BulkInsertAsync(newPhysValues, true);
   

3. Update and bulk update are analogous to create methods:
4. Delete is quite a simple:

    bool result = await repo.DeleteAsync(new List<WhereParameter>()
    {
        new WhereParameter("id", null, false, WhereComparison.Equal, new List<object>(){newPhysValue.Id})
    });
   

Nuget

1. Interface
2. Mysql
3. Postgres
4. SqlServer
5. SqLite

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