modules/platforms/dotnet/Apache.Ignite.Linq/NuGet/LINQPad/QueryExample.linq

<Query Kind="Program">
  <NuGetReference>Apache.Ignite.Linq</NuGetReference>
  <Namespace>Apache.Ignite.Core</Namespace>
  <Namespace>Apache.Ignite.Core.Binary</Namespace>
  <Namespace>Apache.Ignite.Core.Cache.Configuration</Namespace>
  <Namespace>Apache.Ignite.Core.Cache.Query</Namespace>
  <Namespace>Apache.Ignite.Linq</Namespace>
</Query>

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

/// <summary>
/// This example demonstrates put-get operations on Ignite cache
/// with binary values. Note that binary object can be retrieved in
/// fully-deserialized form or in binary object format using special
/// cache projection.
///
/// Requirements:
/// * Java Runtime Environment (JRE): http://www.oracle.com/technetwork/java/javase/downloads/index.html (x86 for regular LINQPad, x64 for AnyCPU LINQPad)
/// * Microsoft Visual C++ 2010 Redistributable Package: http://www.microsoft.com/en-us/download/details.aspx?id=14632 (x86 for regular LINQPad, x64 for AnyCPU LINQPad)
/// </summary>

void Main()
{
	// Force new LINQPad query process to reinit JVM
	Util.NewProcess = true;
	
	// Start instance
	using (var ignite = Ignition.Start())
	{
		// Create and populate organization cache
		var orgs = ignite.GetOrCreateCache<int, Organization>(new CacheConfiguration("orgs-linq",
			new QueryEntity(typeof(int), typeof(Organization))));
		orgs[1] = new Organization { Name = "Apache", Type = "Private", Size = 5300 };
		orgs[2] = new Organization { Name = "Microsoft", Type = "Private", Size = 110000 };
		orgs[3] = new Organization { Name = "Red Cross", Type = "Non-Profit", Size = 35000 };

		// Create and populate person cache
		var persons = ignite.GetOrCreateCache<int, Person>(new CacheConfiguration("persons-linq", typeof(Person)));
		persons[1] = new Person { OrgId = 1, Name = "James Wilson" };
		persons[2] = new Person { OrgId = 1, Name = "Daniel Adams" };
		persons[3] = new Person { OrgId = 2, Name = "Christian Moss" };
		persons[4] = new Person { OrgId = 3, Name = "Allison Mathis" };
		persons[5] = new Person { OrgId = 3, Name = "Christopher Adams" };

		// Create LINQ queryable
		// NOTE: You can use LINQ-to-objects on ICache<K,V> instance directly, but this will cause local execution (slow)
		var orgsQry = orgs.AsCacheQueryable();
		var personsQry = persons.AsCacheQueryable();

		// SQL query
		var sizeQry = orgsQry.Where(x => x.Value.Size < 100000);
		sizeQry.Dump("Organizations with size less than 100K");

		// Introspection
		((ICacheQueryable)sizeQry).GetFieldsQuery().Sql.Dump("Generated SQL");

		// SQL query with join
		const string orgName = "Apache";

		var joinQry =
			from p in personsQry
			from o in orgsQry
			where p.Value.OrgId == o.Key && o.Value.Name == orgName
			select p;

		joinQry.Dump("Persons working for " + orgName);
		((ICacheQueryable)joinQry).GetFieldsQuery().Sql.Dump("Generated SQL");

		// Fields query
		var fieldsQry = orgsQry.Select(o => new { o.Value.Name, o.Value.Size }).OrderBy(x => x.Size);
		fieldsQry.Dump("Fields query");
		((ICacheQueryable)fieldsQry).GetFieldsQuery().Sql.Dump("Generated SQL");
	}
}

public class Organization
{
	[QuerySqlField]
	public string Name { get; set; }
	
	public string Type { get; set; }

	[QuerySqlField]
	public int Size { get; set;}
}

public class Person
{
	public string Name { get; set; }

	[QuerySqlField]
	public int OrgId { get; set; }
}