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Added change event handler to receive notifications when something ch…
…ange on an IEntityType, it works only if Compacted Replicator is in use (#120) * Added change event handler to receive notifications when something change on an IEntityType, it works only if Compacted Replicator is in use * Added template for events * Update template identity
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src/net/templates/templates/kefcoreAppWithEvents/.template.config/template.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| { | ||
| "$schema": "http://json.schemastore.org/template", | ||
| "author": "MASES s.r.l.", | ||
| "classifications": [ "Common", "Library" ], | ||
| "identity": "MASES.EntityFrameworkCore.KNet.Templates.AppWithEvents", | ||
| "name": "Executable template: Simple Console with events for EntityFrameworkCore provider for Apache Kafka project", | ||
| "shortName": "kefcoreAppWithEvents", | ||
| "tags": { | ||
| "language": "C#", | ||
| "type": "project" | ||
| } | ||
| } |
124 changes: 124 additions & 0 deletions
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src/net/templates/templates/kefcoreAppWithEvents/Program.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| using MASES.EntityFrameworkCore.KNet.Infrastructure; | ||
| using Microsoft.EntityFrameworkCore; | ||
| using Microsoft.EntityFrameworkCore.Metadata; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
|
|
||
| namespace MASES.EntityFrameworkCore.KNet.Templates | ||
| { | ||
| partial class Program | ||
| { | ||
| static void OnEvent(IEntityType entity, bool state, object key) | ||
| { | ||
| Console.WriteLine($"Entity {entity.Name} has {(state ? "removed" : "added/updated")} the key {key}"); | ||
| } | ||
|
|
||
| static void Main(string[] args) | ||
| { | ||
| BloggingContext context = null; | ||
| try | ||
| { | ||
| context = new BloggingContext() | ||
| { | ||
| BootstrapServers = "KAFKA-BROKER:9092", | ||
| ApplicationId = "MyApplicationId", | ||
| DbName = "MyDB", | ||
| OnChangeEvent = OnEvent | ||
| }; | ||
| // cleanup topics on Broker | ||
| context.Database.EnsureDeleted(); | ||
| context.Database.EnsureCreated(); | ||
|
|
||
| // prefill data | ||
| for (int i = 0; i < 1000; i++) | ||
| { | ||
| context.Add(new Blog | ||
| { | ||
| Url = "http://blogs.msdn.com/adonet" + i.ToString(), | ||
| Posts = new List<Post>() | ||
| { | ||
| new Post() | ||
| { | ||
| Title = "title", | ||
| Content = i.ToString() | ||
| } | ||
| }, | ||
| Rating = i, | ||
| }); | ||
| } | ||
| // save data | ||
| context.SaveChanges(); | ||
|
|
||
| // make some queries | ||
| var selector = (from op in context.Blogs | ||
| join pg in context.Posts on op.BlogId equals pg.BlogId | ||
| where pg.BlogId == op.BlogId | ||
| select new { pg, op }); | ||
| var pageObject = selector.FirstOrDefault(); | ||
|
|
||
| var post = context.Posts.Single(b => b.BlogId == 2); | ||
|
|
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| post = context.Posts.Single(b => b.BlogId == 1); | ||
|
|
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| var all = context.Posts.All((o) => true); | ||
|
|
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| var value = context.Blogs.AsQueryable().ToQueryString(); | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| Console.WriteLine(ex.ToString()); | ||
| } | ||
| finally | ||
| { | ||
| context?.Dispose(); | ||
| } | ||
| } | ||
| } | ||
|
|
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| public class BloggingContext : KafkaDbContext | ||
| { | ||
| // uncomment for persistent storage | ||
| // public override bool UsePersistentStorage { get; set; } = true; | ||
|
|
||
| // uncomment to disable compacted replicator | ||
| //public override bool UseCompactedReplicator { get; set; } = false; | ||
|
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| public DbSet<Blog> Blogs { get; set; } | ||
| public DbSet<Post> Posts { get; set; } | ||
|
|
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| /// uncomment for model builder | ||
| //protected override void OnModelCreating(ModelBuilder modelBuilder) | ||
| //{ | ||
| // modelBuilder.Entity<Blog>().HasKey(c => new { c.BlogId, c.Rating }); | ||
| //} | ||
| } | ||
|
|
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| public class Blog | ||
| { | ||
| public int BlogId { get; set; } | ||
| public string Url { get; set; } | ||
| public int Rating { get; set; } | ||
| public List<Post> Posts { get; set; } | ||
|
|
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| public override string ToString() | ||
| { | ||
| return $"BlogId: {BlogId} Url: {Url} Rating: {Rating}"; | ||
| } | ||
| } | ||
|
|
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| public class Post | ||
| { | ||
| public int PostId { get; set; } | ||
| public string Title { get; set; } | ||
| public string Content { get; set; } | ||
|
|
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| public int BlogId { get; set; } | ||
| public Blog Blog { get; set; } | ||
|
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| public override string ToString() | ||
| { | ||
| return $"PostId: {PostId} Title: {Title} Content: {Content} BlogId: {BlogId}"; | ||
| } | ||
| } | ||
| } |
14 changes: 14 additions & 0 deletions
14
src/net/templates/templates/kefcoreAppWithEvents/kefcoreAppWithEvents.csproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
| <PropertyGroup> | ||
| <LangVersion>latest</LangVersion> | ||
| <TargetFrameworks>net6.0;net7.0</TargetFrameworks> | ||
| </PropertyGroup> | ||
| <ItemGroup Condition="Exists('..\..\..\KEFCore\KEFCore.csproj')"> | ||
| <!--Within GitHub repo: used for test purpose--> | ||
| <ProjectReference Include="..\..\..\KEFCore\KEFCore.csproj" /> | ||
| </ItemGroup> | ||
| <ItemGroup Condition="!Exists('..\..\..\KEFCore\KEFCore.csproj')"> | ||
| <!--Outside GitHub repo--> | ||
| <PackageReference Include="MASES.EntityFrameworkCore.KNet" Version="0.10.1" IncludeAssets="All" PrivateAssets="None" /> | ||
| </ItemGroup> | ||
| </Project> |
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