Calling the Rules Engine - In Process

// Get the ruleapp from a file.
RuleApplicationReference ruleAppRef =
new FileSystemRuleApplicationReference(@"C:\RuleApps\Rectangle.ruleapp");

// Create a session to manage the rule engine request and response.

// The RuleSession should be disposed after use. This can be done with a "using" statement or by explicitly calling Dispose
using (RuleSession session = new RuleSession(ruleAppRef))
{
 try
 {

         // Create the "Rectangle" Entity defined in the rule application schema and set the values using xml.

         Entity rectangle = session.CreateEntity("Rectangle", @"<Rectangle><Height>2</Height><Width>3</Width></Rectangle>");

         // Apply the rules to calculate the area of the rectangle.
         session.ApplyRules();

         // Get the state and results as XML
         string resultsXml = rectangle.GetXml();
 }

// catch RuleException, base class for all InRule Exceptions

 catch (RuleException ex)
 {
         Console.WriteLine(ex.ToString());
 }
}

// Get the ruleapp from the file system.
RuleApplicationReference ruleAppRef = new FileSystemRuleApplicationReference("C:\\RuleApps\\Invoice.ruleapp");

// The URI for the catalog service.
string Uri = "http://localhost/InRuleCatalogService/Service.svc";

// Get the ruleapp from the repository using the URI, Username, Password, and Rule Application name.
CatalogRuleApplicationReference ruleAppRef = new CatalogRuleApplicationReference(Uri, "CustomerInvoice", "Admin", "password");

// If you are using active directory,  you only need the Uri and application name
ruleAppRef = new CatalogRuleApplicationReference(Uri, "CustomerInvoice");

// you can also specify a version e.g 2
ruleAppRef = new CatalogRuleApplicationReference(Uri, "CustomerInvoice", "Admin", "password",2);

// Using a label for example PRODUCTION
ruleAppRef = new CatalogRuleApplicationReference(Uri, "CustomerInvoice", "Admin", "password", "PRODUCTION");

// Using background version polling and recompilation after the refresh interval has expired
ruleAppRef = new CatalogRuleApplicationReference(Uri, "CustomerInvoice", "Admin", "password", "PRODUCTION", true);

// Open an InMemoryRuleApplicationReference  using the RuleApplicationDef object

// Used when you have a rule RuleApplicationDef object available in memory,

// for example when dynamically generating rule applications via the Repository SDK.
RuleApplicationReference ruleAppRef = new InMemoryRuleApplicationReference (ruleApplicationDef)

// Create a session to the rules engine, passing in a RuleApplicationReference
RuleSession ruleSession = new RuleSession(ruleAppRef);

// Use of cache retention
RuleSession ruleSession = new RuleSession(ruleAppRef, CacheRetention.AlwaysRetain);

// Using  Rule Application Definitions  reference to create a rule session
RuleSession ruleSession = new RuleSession(ruleAppDef);

// Using Rule Application Definition that has been saved to file to create a rule session
RuleSession ruleSession = new RuleSession(@"C:\temp\ruleAppDef");

// Create a rule session with a rule application reference and

// specifying the cache retention
RuleSession ruleSession = new RuleSession(ruleAppRef, CacheRetention.AlwaysRetain);

// Create a rule session with a rule application definition reference and

// specifying the cache retention
RuleSession ruleSession = new RuleSession(ruleAppDef, CacheRetention.AlwaysRetain);

// Using Rule Application Definition that has been saved to file to create

// a rule session and specifying the cache retention
RuleSession ruleSession = new RuleSession(@"C:\temp\ruleAppDef", CacheRetention.AlwaysRetain);

// Using the cache retention weight to control how an rule application will be kept in the cache

// Higher values are more likely to be retained; Lower valies are less likely to be retained

// and therefore expired from the cache. 1000 is the default weight.
RuleSession ruleSession = new RuleSession(ruleAppRef, CacheRetention.FromWeight(5000));

//create a blank mortgage entity
Entity mortgageEntity = ruleSession.CreateEntity("Mortgage");

// Create a mortgage entity with XML
Entity mortgageEntity = ruleSession.CreateEntity("Mortgage",@"<Mortgage>
        <LoanInfo><PropertyId>1</PropertyId><Principal>500000</Principal>
        <APR>6.875</APR><TermInYears>30</TermInYears></LoanInfo><PaymentSummary/></Mortgage>");

// Create a mortgage business object
Mortgage mortgage = new Mortgage();
LoanInfo loanInfo = new LoanInfo();
loanInfo.APR = 6.875m;
loanInfo.PropertyId = 1;
loanInfo.Principal = 500000;
loanInfo.TermInYears = 30;

mortgage.LoanInfo = loanInfo;
mortgage.PaymentSummary = new PaymentSummary();

Entity mortgageEntity = ruleSession.CreateEntity("Mortgage", mortgage);

// Load the state by passing in the path & filename.
mortgageEntity.LoadXml("Mortgage.xml");

// Load state from an XML string.
mortgageEntity.ParseXml("<Mortgage><LoanInfo><Principal>500000</Principal><APR>7</APR><TermInYears>30</TermInYears></LoanInfo><PaymentSummary /></Mortgage>");

//create ruleapp entities
Entity mortgageEntity = ruleSession.CreateEntity("Mortgage");
Entity loanInfo = ruleSession.CreateEntity("LoanInfo");
Entity paymentSummary = ruleSession.CreateEntity("PaymentSummary");

//set loanInfo values

loanInfo.Fields["Principal"].Value = 250000;
loanInfo.Fields["APR"].Value = 5.25;
loanInfo.Fields["TermInYears"].Value = 30;

//associate loanInfo entity to an Mortgage entity field
mortgageEntity.Fields["LoanInfo"].Value = loanInfo;

//associate paymentSummary entity to Mortgage entity field
mortgageEntity.Fields["PaymentSummary"].Value = paymentSummary;

// Save the state by passing in the path & filename.
mortgageEntity.SaveXml("MortgageOutput.xml");

// get a reference to the object model - provided an object was used to

// create (or load) the entity
Mortgage mortgageObject = mortgageEntity.BoundValue as Mortgage;  

// Get the state as XML
string stateXml = mortgageEntity.GetXml();

// Save RuleSession state
ruleSession.SaveState(@"c:\work\state.testscenario");

Loading RuleSession State from the File System

// Load RuleSession state
ruleSession.LoadState(@"c:\work\state.testscenario");