private static void DistributedJoinQueryExample(
ICacheClient <int, Employee> employeeCache,
ICacheClient <int, Organization> organizationCache)
{
const string orgName = "Apache";
var queryOptions = new QueryOptions
{
EnableDistributedJoins = true,
Timeout = new TimeSpan(0, 1, 0)
};
IQueryable <ICacheEntry <int, Employee> > employees = employeeCache.AsCacheQueryable(queryOptions);
IQueryable <ICacheEntry <int, Organization> > organizations = organizationCache.AsCacheQueryable(queryOptions);
IQueryable <ICacheEntry <int, Employee> > qry =
from employee in employees
from organization in organizations
where employee.Value.OrganizationId == organization.Key && organization.Value.Name == orgName
select employee;
Console.WriteLine();
Console.WriteLine($">>> Employees working for {orgName} using distributed joins:");
foreach (ICacheEntry <int, Employee> entry in qry)
{
Console.WriteLine(">>> " + entry.Value);
}
Console.WriteLine($">>> Generated SQL: {qry.ToCacheQueryable().GetFieldsQuery().Sql}");
}
private static void JoinQueryExample(
ICacheClient <AffinityKey, Employee> employeeCache,
ICacheClient <int, Organization> organizationCache)
{
const string orgName = "Apache";
IQueryable <ICacheEntry <AffinityKey, Employee> > employees = employeeCache.AsCacheQueryable();
IQueryable <ICacheEntry <int, Organization> > organizations = organizationCache.AsCacheQueryable();
IQueryable <ICacheEntry <AffinityKey, Employee> > qry =
from employee in employees
from organization in organizations
where employee.Value.OrganizationId == organization.Key && organization.Value.Name == orgName
select employee;
Console.WriteLine();
Console.WriteLine($">>> Employees working for {orgName}:");
foreach (ICacheEntry <AffinityKey, Employee> entry in qry)
{
Console.WriteLine(">>> " + entry.Value);
}
Console.WriteLine($">>> Generated SQL: {qry.ToCacheQueryable().GetFieldsQuery().Sql}");
}
private static void FieldsQueryExample(ICacheClient <int, Employee> cache)
{
var qry = cache.AsCacheQueryable().Select(entry => new { entry.Value.Name, entry.Value.Salary });
Console.WriteLine();
Console.WriteLine(">>> Employee names and their salaries:");
foreach (var row in qry)
{
Console.WriteLine($">>> [Name={row.Name}, salary={row.Salary}{']'}");
}
Console.WriteLine($">>> Generated SQL: {qry.ToCacheQueryable().GetFieldsQuery().Sql}");
}
/// <summary>
/// Queries names and salaries for all employees.
/// </summary>
/// <param name="cache">Cache.</param>
private static void LinqFieldsExample(ICacheClient <int, Employee> cache)
{
var qry = cache.AsCacheQueryable().Select(entry => new { entry.Value.Name, entry.Value.Salary });
Console.WriteLine();
Console.WriteLine(">>> Employee names and their salaries (LINQ):");
foreach (var row in qry)
{
Console.WriteLine(">>> [Name=" + row.Name + ", salary=" + row.Salary + ']');
}
Console.WriteLine();
Console.WriteLine(">>> Generated SQL:");
Console.WriteLine(">>> " + qry.ToCacheQueryable().GetFieldsQuery().Sql);
}
private static void QueryExample(ICacheClient <int, Employee> cache)
{
const int zip = 94109;
IQueryable <ICacheEntry <int, Employee> > qry =
cache.AsCacheQueryable().Where(emp => emp.Value.Address.Zip == zip);
Console.WriteLine();
Console.WriteLine($">>> Employees with zipcode {zip}:");
foreach (ICacheEntry <int, Employee> entry in qry)
{
Console.WriteLine(">>> " + entry.Value);
}
Console.WriteLine($">>> Generated SQL: {qry.ToCacheQueryable().GetFieldsQuery().Sql}");
}
private static void CompiledQueryExample(ICacheClient <int, Employee> cache)
{
const int zip = 94109;
var cache0 = cache.AsCacheQueryable();
// Compile cache query to eliminate LINQ overhead on multiple runs.
Func <int, IQueryCursor <ICacheEntry <int, Employee> > > qry =
CompiledQuery.Compile((int z) => cache0.Where(emp => emp.Value.Address.Zip == z));
Console.WriteLine();
Console.WriteLine(">>> Employees with zipcode {0} using compiled query:", zip);
foreach (ICacheEntry <int, Employee> entry in qry(zip))
{
Console.WriteLine(">>> " + entry.Value);
}
}
