Improve performance of Dynamic Application Factories

Also added a method overload to provide a Package Name.
Useful for DX based second generation packages. Now each package can have their own bindings.

.run/RunAllTest.run.xml

@@ -0,0 +1,33 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="RunAllTest" type="com.illuminatedcloud.intellij" factoryName="Apex Unit Tests" show_console_on_std_err="false" show_console_on_std_out="false">
+    <option name="allTests" value="true" />
+    <option name="allowRunningInParallel" value="false" />
+    <option name="apexLogLevel" value="DEBUG" />
+    <option name="calloutsLogLevel" value="INFO" />
+    <option name="connectionName" value="apex-extensions" />
+    <option name="connectionType" value="SFDX" />
+    <option name="contextConfiguration" value="false" />
+    <option name="databaseLogLevel" value="INFO" />
+    <option name="directoryPath" />
+    <option name="logLevelsInitialized" value="true" />
+    <option name="moduleToTestClassNames">
+      <map />
+    </option>
+    <option name="nbaLogLevel" value="INFO" />
+    <option name="profilingLogLevel" value="INFO" />
+    <option name="projectPathOnTarget" />
+    <option name="selectedOptions">
+      <list />
+    </option>
+    <option name="systemLogLevel" value="DEBUG" />
+    <option name="testClassToTestMethodNames">
+      <map />
+    </option>
+    <option name="testSuiteName" />
+    <option name="validationLogLevel" value="INFO" />
+    <option name="visualforceLogLevel" value="INFO" />
+    <option name="waveLogLevel" value="INFO" />
+    <option name="workflowLogLevel" value="INFO" />
+    <method v="2" />
+  </configuration>
+</component>

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_AppBinding.cls

@@ -37,6 +37,7 @@ public virtual class fflib_AppBinding
 	protected System.Type implementationType { get; set; }
 	protected System.Type interfaceType { get; set; }
 	protected String namespacePrefix { get; set; }
+	protected String packageName { get; set; }
 	protected fflib_SharingMode sharingMode { get; set; }
 
 	public Integer compareTo(Object compareTo)
@@ -89,6 +90,14 @@ public virtual class fflib_AppBinding
 		return this.namespacePrefix;
 	}
 
+	/**
+	 * @return Returns the Application Package Name for the binding
+	 */
+	public String getPackageName()
+	{
+		return this.packageName;
+	}
+
 	/**
 	 * @return Returns the number of the order sequence in which the binding should be returned
 	 */
@@ -188,6 +197,19 @@ public virtual class fflib_AppBinding
 		return this;
 	}
 
+	/**
+	 * Sets the Application Second Generation Package Name
+	 *
+	 * @param applicationPackageName The name of the 2GP package
+	 *
+	 * @return An instance of itself to enable method chaining
+	 */
+	public fflib_IAppBinding setPackageName(String applicationPackageName)
+	{
+		this.packageName = applicationPackageName;
+		return this;
+	}
+
 	/**
 	 * Set the order number so that the resolver can sort the bindings.
 	 * The higher the number, the more priority.

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_AppBindingMetaDataModule.cls

@@ -43,6 +43,7 @@ public with sharing class fflib_AppBindingMetaDataModule
 							.setImplementationType(getSystemType(binding, fflib_AppBinding__mdt.ImplementationType__c))
 							.setInterfaceType(getSystemType(binding, fflib_AppBinding__mdt.InterfaceType__c))
 							.setNamespacePrefix(binding.NamespacePrefix)
+							.setPackageName(binding.ApplicationPackage__r.DeveloperName)
 							.setSequence(binding.BindingSequence__c)
 							.setSharingMode(getSharingModeFromString(binding.SharingMode__c))
 			);

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_AppBindingResolver.cls

@@ -132,6 +132,11 @@ public virtual class fflib_AppBindingResolver
 		return this;
 	}
 
+	public fflib_IAppBindingResolver byPackageName(String packageName)
+	{
+		this.bindingToResolve.setPackageName(packageName);
+		return this;
+	}
 
 	/**
 	 * Handles lazy loading of modules, if no custom module is configured (via addModule) the default module is returned

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_AppBindings.cls

@@ -63,6 +63,67 @@ public virtual class fflib_AppBindings
 		}
 	}
 
+	public List<fflib_IAppBinding> getBindings()
+	{
+		return this.bindings;
+	}
+
+	public Map<Object, Type> getImplementationByBindingObject()
+	{
+		this.bindings.sort();
+
+		Map<Object, Type> result = new Map<Object, Type>();
+		for (fflib_IAppBinding binding : bindings)
+		{
+			Object bindingObject = binding.getBindingObject();
+			if (result.containsKey(bindingObject)) continue; // Skip bindings with lower sequence
+
+			result.put(bindingObject, binding.getImplementationType());
+		}
+		return result;
+	}
+
+	public Map<Type, Type> getImplementationByInterface()
+	{
+		this.bindings.sort();
+
+		Map<Type, Type> result = new Map<Type, Type>();
+		for (fflib_IAppBinding binding : bindings)
+		{
+			Type interfaceType = binding.getInterfaceType();
+			if (result.containsKey(interfaceType)) continue; // Skip bindings with lower sequence
+
+			result.put(interfaceType, binding.getImplementationType());
+		}
+		return result;
+	}
+
+	public Map<SObjectType, Type> getImplementationBySObjectType()
+	{
+		Map<SObjectType, Type> result = new Map<SObjectType, Type>();
+		for (fflib_IAppBinding binding : bindings)
+		{
+			Object bindingObject = binding.getBindingObject();
+			if (bindingObject instanceof SObjectType && result.containsKey((SObjectType) bindingObject) == false)
+			{
+				result.put((SObjectType) bindingObject, binding.getImplementationType());
+			}
+		}
+		return result;
+	}
+
+	public List<System.Type> getImplementations()
+	{
+		List<System.Type> result = new List<System.Type>();
+		for (fflib_IAppBinding binding : bindings)
+		{
+			result.add(
+					binding.getImplementationType()
+			);
+		}
+		return result;
+	}
+
 	public fflib_IAppBindings selectByObject(Object bindingObject)
 	{
 		if (null == bindingObject) return this;
@@ -149,21 +210,18 @@ public virtual class fflib_AppBindings
 		return new fflib_AppBindings(result);
 	}
 
-	public List<fflib_IAppBinding> getBindings()
+	public fflib_IAppBindings selectByPackageName(String packageName)
 	{
-		return this.bindings;
-	}
+		if (null == packageName) return this;
 
-	public List<System.Type> getImplementations()
-	{
-		List<System.Type> result = new List<System.Type>();
+		List<fflib_IAppBinding> result = new List<fflib_IAppBinding>();
 		for (fflib_IAppBinding binding : bindings)
 		{
-			result.add(
-					binding.getImplementationType()
-			);
+			if (binding.getPackageName() != packageName) continue;
+
+			result.add(binding);
 		}
-		return result;
+		return new fflib_AppBindings(result);
 	}
 
 	public List<Object> getObjects()

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_AppBindingsSelector.cls

@@ -75,6 +75,7 @@ public virtual without sharing class fflib_AppBindingsSelector extends fflib_SOb
 
 		return (List<fflib_AppBinding__mdt>) Database.query(
 				newQueryFactory()
+						.selectField('ApplicationPackage__r.DeveloperName')
 						.selectField('BindingObject__r.QualifiedApiName')
 						.toSOQL());
 						*/
@@ -84,7 +85,9 @@ public virtual without sharing class fflib_AppBindingsSelector extends fflib_SOb
 						'SELECT {0} FROM {1}',
 						new List<String>
 						{
-								getFieldListString() + ', BindingObject__r.QualifiedApiName',
+								getFieldListString()
+										+ ', BindingObject__r.QualifiedApiName'
+										+ ', ApplicationPackage__r.DeveloperName',
 								getSObjectType().getDescribe().getName()
 						}
 				)

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_DynamicAppFactory.cls

@@ -30,6 +30,8 @@
  */
 public abstract class fflib_DynamicAppFactory
 {
+	protected String packageName;
+
 	protected fflib_SharingMode sharingMode
 	{
 		get

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_DynamicDomainFactory.cls

@@ -33,9 +33,8 @@ public virtual class fflib_DynamicDomainFactory
 		extends fflib_DynamicAppFactory
 		implements fflib_IDomainFactory
 {
-	protected Map<Object, fflib_IDomain> mockDomainByObjectType = new Map<Object, fflib_IDomain>();
 	protected fflib_ISelectorFactory selectorFactory;
-
+	protected fflib_ClassicDomainFactory domainFactory;
 
 	/**
 	 * Class constructor
@@ -44,9 +43,25 @@ public virtual class fflib_DynamicDomainFactory
 	 * @param selectorFactory A reference to the selector factory instance
 	 */
 	public fflib_DynamicDomainFactory(fflib_IAppBindingResolver resolver, fflib_ISelectorFactory selectorFactory)
+	{
+		this(resolver, selectorFactory, null);
+	}
+
+	/**
+	 * Class constructor
+	 *
+	 * @param resolver A reference to the resolve instance
+	 * @param selectorFactory A reference to the selector factory instance
+	 * @param packageName The package name
+	 */
+	public fflib_DynamicDomainFactory(
+			fflib_IAppBindingResolver resolver,
+			fflib_ISelectorFactory selectorFactory,
+			String packageName)
 	{
 		this.resolver = resolver;
 		this.selectorFactory = selectorFactory;
+		this.packageName = packageName;
 	}
 
 	public fflib_IDomain newInstance(Set<Id> recordIds)
@@ -61,42 +76,16 @@ public virtual class fflib_DynamicDomainFactory
 
 	public fflib_IDomain newInstance(List<SObject> records)
 	{
-		SObjectType sObjectType = records.getSObjectType();
+		if (domainFactory == null) loadBindings();
 
-		if (sObjectType == null)
-			throw new DeveloperException('Could not determine the SObjectType of the provided records');
-
-		return newInstance(
-				(List<Object>) records,
-				(Object) sObjectType
-		);
+		return this.domainFactory.newInstance(records);
 	}
 
 	public fflib_IDomain newInstance(List<Object> objects, Object objectType)
 	{
-		if (hasMock(objectType)) return (fflib_IDomain) getMock(objectType);
+		if (domainFactory == null) loadBindings();
 
-		List<fflib_IAppBinding> bindings = resolver.byObject(objectType)
-				.byType(fflib_AppBindingType.Domain)
-				.resolve();
-
-		if (bindings.isEmpty())
-			throw new DeveloperException('Unable to find domain binding for ' + objectType);
-
-		System.Type domainImplementationType = bindings.get(0).getImplementationType();
-
-		Object instance = domainImplementationType.newInstance();
-
-		if (!(instance instanceof fflib_IDomainConstructor))
-			throw new DeveloperException(
-					String.format(
-						'Domain implementation {0} should be an instance of fflib_IDomainConstructor',
-						new List<String> { domainImplementationType.getName() }
-					)
-			);
-
-		return ((fflib_IDomainConstructor) domainImplementationType.newInstance())
-				.construct(objects);
+		return this.domainFactory.newInstance(objects, objectType);
 	}
 
 	public fflib_IDomain newInstance(List<SObject> records, SObjectType domainSObjectType)
@@ -106,22 +95,47 @@ public virtual class fflib_DynamicDomainFactory
 
 	public void setMock(fflib_ISObjectDomain mockDomain)
 	{
-		super.setMock(mockDomain.getType(), mockDomain);
+		if (domainFactory == null) loadBindings();
+
+		this.domainFactory.setMock(mockDomain);
 	}
 
 	public void setMock(Schema.SObjectType sObjectType, fflib_ISObjectDomain mockDomain)
 	{
-		super.setMock(sObjectType, mockDomain);
+		if (domainFactory == null) loadBindings();
+
+		this.domainFactory.setMock(sObjectType, mockDomain);
 	}
 
 	public void setMock(fflib_IDomain mockDomain)
 	{
-		super.setMock(mockDomain.getType(), mockDomain);
+		if (domainFactory == null) loadBindings();
+
+		this.domainFactory.setMock(mockDomain);
 	}
 
 	public void setMock(Object domainType, fflib_IDomain mockDomain)
 	{
-		super.setMock(domainType, mockDomain);
+		if (domainFactory == null) loadBindings();
+
+		this.domainFactory.setMock(domainType, mockDomain);
+	}
+
+	private void loadBindings()
+	{
+		fflib_IAppBindings appBindings = new fflib_AppBindings(resolver.resolve());
+
+		// If a package name is provide we should filter on package name
+		if (String.isNotBlank(this.packageName))
+		{
+			appBindings = appBindings.selectByPackageName(this.packageName);
+		}
+
+		Map<Object, Type> constructorByObject =
+				appBindings.selectByType(fflib_AppBindingType.Domain)
+						.getImplementationByBindingObject();
+
+		this.domainFactory = new fflib_ClassicDomainFactory(this.selectorFactory, constructorByObject);
 	}
 
 	public class DeveloperException extends Exception {}

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_DynamicSelectorFactory.cls

@@ -32,86 +32,66 @@ public virtual class fflib_DynamicSelectorFactory
 		extends fflib_DynamicAppFactory
 		implements fflib_ISelectorFactory
 {
-	public static final fflib_AppBindingType SELECTOR_BINDING_TYPE = fflib_AppBindingType.Selector;
-
-	protected Map<Object, Object> mockSelectorImplByObjectType = new Map<Object, Object>();
+	protected fflib_ClassicSelectorFactory selectorFactory;
 
 	public fflib_DynamicSelectorFactory(fflib_IAppBindingResolver resolver)
+	{
+		this(resolver, null);
+	}
+
+	public fflib_DynamicSelectorFactory(fflib_IAppBindingResolver resolver, String packageName)
 	{
 		this.resolver = resolver;
+		this.packageName = packageName;
 	}
 
 	public fflib_ISObjectSelector newInstance(SObjectType sObjectType)
 	{
-		if (hasMock(sObjectType)) return (fflib_ISObjectSelector) getMock(sObjectType);
+		if (this.selectorFactory == null) loadBindings();
 
-		List<fflib_IAppBinding> bindings = resolver
-				.byType(SELECTOR_BINDING_TYPE)
-				.byObject(sObjectType)
-				.bySharingMode(sharingMode)
-				.resolve();
-
-		if (bindings.isEmpty())
-			throw new DeveloperException(
-					String.format(
-							'Unable to find selector binding for {0} with sharing mode {1}',
-							new List<String>
-							{
-									sObjectType.getDescribe().getName(),
-									sharingMode.name()
-							}
-					)
-			);
-
-		return (fflib_ISObjectSelector) bindings.get(0).newImplInstance();
+		return this.selectorFactory.newInstance(sObjectType);
 	}
 
 	public List<SObject> selectById(Set<Id> recordIds)
 	{
-		if (null == recordIds || recordIds.size() == 0)
-			throw new fflib_Application.DeveloperException('Invalid record Id\'s set');
+		if (this.selectorFactory == null) loadBindings();
 
-		return selectById(recordIds, new List<Id>(recordIds)[0].getSObjectType());
+		return this.selectorFactory.selectById(recordIds);
 	}
 
 	public List<SObject> selectById(Set<Id> recordIds, SObjectType sObjectType)
 	{
-		if (null == recordIds || recordIds.size() == 0)
-			throw new fflib_Application.DeveloperException('Invalid record Id\'s set');
+		if (this.selectorFactory == null) loadBindings();
 
-		return newInstance(sObjectType)
-				.selectSObjectsById(recordIds);
+		return this.selectorFactory.selectById(recordIds, sObjectType);
 	}
 
 	public List<SObject> selectByRelationship(List<SObject> relatedRecords, SObjectField relationshipField)
 	{
-		Set<Id> relatedIds =
-				new RelatedRecordsDomain(relatedRecords)
-						.getRelatedIds(relationshipField);
+		if (this.selectorFactory == null) loadBindings();
 
-		if (relatedIds.isEmpty()) return new List<SObject>();
-
-		return selectById(relatedIds);
+		return this.selectorFactory.selectByRelationship(relatedRecords, relationshipField);
 	}
 
 	public void replaceWith(SObjectType sObjectType, Type replacementImplType)
 	{
-		resolver.byType(fflib_AppBindingType.Selector)
-				.byObject(sObjectType)
-				.bySharingMode(this.sharingMode)
-				.resolve()
-				.get(0)
-				.setImplementationType(replacementImplType);
+		if (this.selectorFactory == null) loadBindings();
+
+		this.selectorFactory.replaceWith(sObjectType, replacementImplType);
 	}
 
 	public void setMock(fflib_ISObjectSelector selectorInstance)
 	{
-		setMock(selectorInstance.sObjectType(), selectorInstance);
+		if (this.selectorFactory == null) loadBindings();
+
+		this.selectorFactory.setMock(selectorInstance);
 	}
 
 	public void setMock(SObjectType sObjectType, fflib_ISObjectSelector selectorInstance)
 	{
-		super.setMock(sObjectType, selectorInstance);
+		if (this.selectorFactory == null) loadBindings();
+
+		this.selectorFactory.setMock(sObjectType, selectorInstance);
 	}
 
 	public fflib_DynamicSelectorFactory setSharingMode(fflib_SharingMode sharingMode)
@@ -120,17 +100,22 @@ public virtual class fflib_DynamicSelectorFactory
 		return this;
 	}
 
-	private class RelatedRecordsDomain extends fflib_SObjects2
+	private void loadBindings()
 	{
-		public 	RelatedRecordsDomain(List<SObject> records)
+		fflib_IAppBindings appBindings = new fflib_AppBindings(resolver.resolve());
+
+		// If a package name is provide we should filter on package name
+		if (String.isNotBlank(this.packageName))
 		{
-			super(records);
+			appBindings = appBindings.selectByPackageName(this.packageName);
 		}
 
-		public Set<Id> getRelatedIds(Schema.SObjectField relationshipField)
-		{
-			return getIdFieldValues(relationshipField);
-		}
+		Map<SObjectType, Type> implementationBySObjectType =
+				appBindings.selectByType(fflib_AppBindingType.Selector)
+						.selectBySharingMode(this.sharingMode)
+						.getImplementationBySObjectType();
+
+		this.selectorFactory = new fflib_ClassicSelectorFactory(implementationBySObjectType);
 	}
 
 	public class DeveloperException extends Exception {}

sfdx-source/apex-extensions/main/application/dynamic/classes/fflib_DynamicServiceFactory.cls

@@ -32,53 +32,38 @@ public virtual class fflib_DynamicServiceFactory
 		extends fflib_DynamicAppFactory
 		implements fflib_IServiceFactory
 {
-	public static final fflib_AppBindingType SERVICE_BINDING_TYPE = fflib_AppBindingType.Service;
-
-	protected Map<System.Type, Object> mockServiceImplByObjectType = new Map<System.Type, Object>();
+	protected fflib_ClassicServiceFactory serviceFactory;
 
 	public fflib_DynamicServiceFactory(fflib_IAppBindingResolver resolver)
+	{
+		this(resolver, null);
+	}
+
+	public fflib_DynamicServiceFactory(fflib_IAppBindingResolver resolver, String packageName)
 	{
 		this.resolver = resolver;
+		this.packageName = packageName;
 	}
 
 	public Object newInstance(Type serviceInterfaceType)
 	{
-		if (hasMock(serviceInterfaceType)) return getMock(serviceInterfaceType);
+		if (serviceFactory == null) loadBindings();
 
-		List<fflib_IAppBinding> bindings = resolver
-				.byType(SERVICE_BINDING_TYPE)
-				.byInterfaceType(serviceInterfaceType)
-				.bySharingMode(sharingMode)
-				.resolve();
-
-		if (bindings.isEmpty())
-			throw new DeveloperException(
-					String.format(
-							'Unable to find service binding for {0} with sharing more {1}',
-							new List<String>
-							{
-									serviceInterfaceType.getName(),
-									sharingMode.name()
-							}
-					)
-			);
-
-		return bindings.get(0).newImplInstance();
+		return this.serviceFactory.newInstance(serviceInterfaceType);
 	}
 
 	public void replaceWith(Type serviceInterfaceType, Type replacementImplType)
 	{
-		resolver.byType(SERVICE_BINDING_TYPE)
-				.byInterfaceType(serviceInterfaceType)
-				.bySharingMode(sharingMode)
-				.resolve()
-				.get(0) // TODO - validate that there are any resolved bindings
-				.setImplementationType(replacementImplType);
+		if (serviceFactory == null) loadBindings();
+
+		this.serviceFactory.replaceWith(serviceInterfaceType, replacementImplType);
 	}
 
 	public void setMock(Type serviceInterfaceType, Object serviceImpl)
 	{
-		super.setMock(serviceInterfaceType, serviceImpl);
+		if (serviceFactory == null) loadBindings();
+
+		this.serviceFactory.setMock(serviceInterfaceType, serviceImpl);
 	}
 
 	public fflib_DynamicServiceFactory setSharingMode(fflib_SharingMode sharingMode)
@@ -87,5 +72,22 @@ public virtual class fflib_DynamicServiceFactory
 		return this;
 	}
 
+	private void loadBindings()
+	{
+		fflib_IAppBindings appBindings = new fflib_AppBindings(resolver.resolve());
+
+		// If a package name is provide we should filter on package name
+		if (String.isNotBlank(this.packageName))
+		{
+			appBindings = appBindings.selectByPackageName(this.packageName);
+		}
+
+		Map<Type, Type> implementationByInterface =
+				appBindings.selectByType(fflib_AppBindingType.Service)
+						.getImplementationByInterface();
+
+		this.serviceFactory = new fflib_ClassicServiceFactory(implementationByInterface);
+	}
+
 	public class DeveloperException extends Exception {}
 }

sfdx-source/apex-extensions/main/application/dynamic/classes/interfaces/fflib_IAppBinding.cls

@@ -56,6 +56,10 @@ public interface fflib_IAppBinding
 	 * @return Returns the Namespace for the binding
 	 */
 	String getNamespacePrefix();
+	/**
+	 * @return Returns the Application Package Name for the binding
+	 */
+	String getPackageName();
 
 	/**
 	 * @return Returns the number of the order sequence in which the binding should be returned
@@ -127,6 +131,13 @@ public interface fflib_IAppBinding
 	 */
 	fflib_IAppBinding setNamespacePrefix(String namespacePrefix);
 
+	/**
+	 * @param applicationPackageName The name of the Application Second Generation Package
+	 *
+	 * @return An instance of itself to enable method chaining
+	 */
+	fflib_IAppBinding setPackageName(String applicationPackageName);
+
 	/**
 	 * Set the order number so that the resolver can sort the bindings.
 	 * The higher the number, the more priority.

sfdx-source/apex-extensions/main/application/dynamic/classes/interfaces/fflib_IAppBindingResolver.cls

@@ -37,5 +37,6 @@ public interface fflib_IAppBindingResolver
 	fflib_IAppBindingResolver byInterfaceType(System.Type interfaceType);
 	fflib_IAppBindingResolver bySharingMode(fflib_SharingMode sharingMode);
 	fflib_IAppBindingResolver byNamespacePrefix(String namespacePrefix);
+	fflib_IAppBindingResolver byPackageName(String packageName);
 	List<fflib_IAppBinding> resolve();
 }

sfdx-source/apex-extensions/main/application/dynamic/classes/interfaces/fflib_IAppBindings.cls

@@ -34,13 +34,17 @@ public interface fflib_IAppBindings
 	void addBinding(fflib_IAppBinding binding);
 	void addBindings(List<fflib_IAppBinding> bindings);
 
+	List<fflib_IAppBinding> getBindings();
+	Map<Object, Type> getImplementationByBindingObject();
+	Map<Type, Type> getImplementationByInterface();
+	Map<SObjectType, Type> getImplementationBySObjectType();
+	List<System.Type> getImplementations();
+
 	fflib_IAppBindings selectByObject(Object bindingObject);
 	fflib_IAppBindings selectBySequence(Decimal sequence);
 	fflib_IAppBindings selectByType(fflib_AppBindingType bindingType);
 	fflib_IAppBindings selectByInterfaceType(System.Type interfaceType);
 	fflib_IAppBindings selectBySharingMode(fflib_SharingMode sharingMode);
 	fflib_IAppBindings selectByNamespacePrefix(String namespacePrefix);
-
-	List<fflib_IAppBinding> getBindings();
-	List<System.Type> getImplementations();
+	fflib_IAppBindings selectByPackageName(String packageName);
 }

sfdx-source/apex-extensions/main/application/dynamic/layouts/fflib_AppBinding__mdt-Binding Layout.layout-meta.xml

@@ -18,6 +18,10 @@
                 <behavior>Required</behavior>
                 <field>Type__c</field>
             </layoutItems>
+            <layoutItems>
+                <behavior>Edit</behavior>
+                <field>ApplicationPackage__c</field>
+            </layoutItems>
         </layoutColumns>
         <layoutColumns>
             <layoutItems>

sfdx-source/apex-extensions/main/application/dynamic/layouts/fflib_ApplicationPackage__mdt-Application Package Layout.layout-meta.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Layout xmlns="http://soap.sforce.com/2006/04/metadata">
+    <layoutSections>
+        <customLabel>false</customLabel>
+        <detailHeading>false</detailHeading>
+        <editHeading>true</editHeading>
+        <label>Information</label>
+        <layoutColumns>
+            <layoutItems>
+                <behavior>Required</behavior>
+                <field>MasterLabel</field>
+            </layoutItems>
+            <layoutItems>
+                <behavior>Required</behavior>
+                <field>DeveloperName</field>
+            </layoutItems>
+        </layoutColumns>
+        <layoutColumns>
+            <layoutItems>
+                <behavior>Edit</behavior>
+                <field>IsProtected</field>
+            </layoutItems>
+            <layoutItems>
+                <behavior>Required</behavior>
+                <field>NamespacePrefix</field>
+            </layoutItems>
+        </layoutColumns>
+        <style>TwoColumnsTopToBottom</style>
+    </layoutSections>
+    <layoutSections>
+        <customLabel>false</customLabel>
+        <detailHeading>false</detailHeading>
+        <editHeading>true</editHeading>
+        <label>System Information</label>
+        <layoutColumns>
+            <layoutItems>
+                <behavior>Readonly</behavior>
+                <field>CreatedById</field>
+            </layoutItems>
+        </layoutColumns>
+        <layoutColumns>
+            <layoutItems>
+                <behavior>Readonly</behavior>
+                <field>LastModifiedById</field>
+            </layoutItems>
+        </layoutColumns>
+        <style>TwoColumnsTopToBottom</style>
+    </layoutSections>
+    <layoutSections>
+        <customLabel>false</customLabel>
+        <detailHeading>false</detailHeading>
+        <editHeading>false</editHeading>
+        <layoutColumns/>
+        <style>CustomLinks</style>
+    </layoutSections>
+    <relatedLists>
+        <fields>MasterLabel</fields>
+        <fields>DeveloperName</fields>
+        <fields>NamespacePrefix</fields>
+        <relatedList>fflib_AppBinding__mdt.ApplicationPackage__c</relatedList>
+    </relatedLists>
+    <showEmailCheckbox>false</showEmailCheckbox>
+    <showHighlightsPanel>false</showHighlightsPanel>
+    <showInteractionLogPanel>false</showInteractionLogPanel>
+    <showRunAssignmentRulesCheckbox>false</showRunAssignmentRulesCheckbox>
+    <showSubmitAndAttachButton>false</showSubmitAndAttachButton>
+</Layout>

sfdx-source/apex-extensions/main/application/dynamic/objects/fflib_AppBinding__mdt/fields/ApplicationPackage__c.field-meta.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<CustomField xmlns="http://soap.sforce.com/2006/04/metadata">
+    <fullName>ApplicationPackage__c</fullName>
+    <externalId>false</externalId>
+    <fieldManageability>DeveloperControlled</fieldManageability>
+    <label>Application Package</label>
+    <referenceTo>fflib_ApplicationPackage__mdt</referenceTo>
+    <relationshipLabel>Application Bindings</relationshipLabel>
+    <relationshipName>ApplicationBindings</relationshipName>
+    <required>false</required>
+    <type>MetadataRelationship</type>
+    <unique>false</unique>
+</CustomField>

sfdx-source/apex-extensions/main/application/dynamic/objects/fflib_ApplicationPackage__mdt/fflib_ApplicationPackage__mdt.object-meta.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<CustomObject xmlns="http://soap.sforce.com/2006/04/metadata">
+    <description>Define individual packages if your application contains multiple second generation packages (2GP)</description>
+    <label>Application Package</label>
+    <pluralLabel>Application Packages</pluralLabel>
+    <visibility>Public</visibility>
+</CustomObject>

sfdx-source/apex-extensions/main/default/classes/utils/fflib_MockSObjectUtil.cls

@@ -111,6 +111,5 @@ public with sharing class fflib_MockSObjectUtil
 		Lead record = new Lead(Id = fflib_IDGenerator.generate(Schema.Lead.SObjectType));
 		SObject result = addFieldValue(record, Lead.ConvertedDate, today);
 		System.assertEquals(today, result.get(Lead.ConvertedDate));
-		System.debug('result: '+result);
 	}
 }

sfdx-source/apex-extensions/tests/classes/application/fflib_DynamicDomainFactoryTest.cls

@@ -31,15 +31,24 @@
 @IsTest(IsParallel=true)
 public class fflib_DynamicDomainFactoryTest
 {
+    private static final SObjectType ACCOUNT_OBJECT_TYPE = Schema.Account.SObjectType;
+    private static final String PACKAGE_FORCE_APP = 'force-app';
+    private static final String PACKAGE_OTHER_APP = 'other-app';
+
     private static final fflib_IAppBindingResolver bindingResolver =
             new fflib_AppBindingResolver();
 
-
     private static final fflib_DynamicDomainFactory Domain =
             new fflib_DynamicDomainFactory(
                     bindingResolver,
-                    fflib_DynamicSelectorFactoryTest.Selector);
-    private static final SObjectType ACCOUNT_OBJECT_TYPE = Schema.Account.SObjectType;
+                    fflib_DynamicSelectorFactoryTest.Selector,
+                    PACKAGE_FORCE_APP);
+
+    private static final fflib_DynamicDomainFactory OtherDomain =
+            new fflib_DynamicDomainFactory(
+                    bindingResolver,
+                    fflib_DynamicSelectorFactoryTest.Selector,
+                    PACKAGE_OTHER_APP);
 
     @IsTest
 	static void itShouldReturnDomain()
@@ -107,6 +116,19 @@ public class fflib_DynamicDomainFactoryTest
         System.Assert.isTrue(instanceB.getRecords().isEmpty());
     }
 
+    @IsTest
+    static void itShouldReturnTheRightDomainForThePackage()
+    {
+        fflib_AppBindingsSelector.SELECTOR_IMPL_TYPE = AppBindingsSelectorMock.class;
+
+        final List<Account> records = generateAccountRecords();
+
+        System.Test.startTest();
+        fflib_IDomain otherDomain = OtherDomain.newInstance(records);
+        System.Test.stopTest();
+
+        System.Assert.isTrue(otherDomain instanceof fflib_SObjects2, 'Incorrect returned instance');
+    }
 
     private static List<Account> generateAccountRecords()
     {
@@ -128,18 +150,46 @@ public class fflib_DynamicDomainFactoryTest
         }
     }
 
+    public class OtherDomainConstructor implements fflib_IDomainConstructor
+    {
+        public fflib_IDomain construct(List<Object> objects)
+        {
+            return new fflib_SObjects2((List<SObject>) objects);
+        }
+    }
+
     private class AppBindingsSelectorMock extends fflib_AppBindingsSelector
     {
         public override List<fflib_AppBinding__mdt> selectAll()
         {
+            fflib_ApplicationPackage__mdt forceApp =
+                    new fflib_ApplicationPackage__mdt(
+                            Id = fflib_IDGenerator.generate(fflib_ApplicationPackage__mdt.SObjectType),
+                            DeveloperName = PACKAGE_FORCE_APP);
+            fflib_ApplicationPackage__mdt otherApp =
+                    new fflib_ApplicationPackage__mdt(
+                            Id = fflib_IDGenerator.generate(fflib_ApplicationPackage__mdt.SObjectType),
+                            DeveloperName = PACKAGE_OTHER_APP);
+
             return new List<fflib_AppBinding__mdt>
             {
                     new fflib_AppBinding__mdt(
+                            ApplicationPackage__c = forceApp.Id,
+                            ApplicationPackage__r = forceApp,
                             Type__c = 'Domain',
                             BindingObject__c = '',
                             BindingObjectAlternate__c = ACCOUNT_OBJECT_TYPE.getDescribe().getName(),
                             ImplementationType__c = MyDomainConstructor.class.getName(),
                             SharingMode__c = 'None'
+                    ),
+                    new fflib_AppBinding__mdt(
+                            ApplicationPackage__c = otherApp.Id,
+                            ApplicationPackage__r = otherApp,
+                            Type__c = 'Domain',
+                            BindingObject__c = '',
+                            BindingObjectAlternate__c = ACCOUNT_OBJECT_TYPE.getDescribe().getName(),
+                            ImplementationType__c = OtherDomainConstructor.class.getName(),
+                            SharingMode__c = 'None'
                     )
             };
         }

sfdx-source/apex-extensions/tests/classes/domains/fflib_SObjects2Test.cls

@@ -153,7 +153,6 @@ private class fflib_SObjects2Test
 				}
 		);
 		System.Test.stopTest();
-		System.debug('result: ' + JSON.serializePretty(result));
 
 		// THEN it should return the AccountId By CaseId
 		System.Assert.areEqual(1, result.size(), 'Expected one account');
@@ -194,7 +193,6 @@ private class fflib_SObjects2Test
 				}
 		);
 		System.Test.stopTest();
-		System.debug('result: ' + JSON.serializePretty(result));
 
 		// THEN it should return the AccountId By CaseId
 		System.Assert.areEqual(1, result.size(), 'Expected one account');

sfdx-source/apex-extensions/tests/classes/logger/fflib_LogEventAppenderTest.cls

@@ -91,7 +91,6 @@ private class fflib_LogEventAppenderTest
 		fflib_LogEventAppender eventAppender = new fflib_LogEventAppender();
 
 		fflib_LogLevelFilter__c orgSettings = fflib_LogLevelFilter__c.getOrgDefaults();
-		System.debug(orgSettings);
 		orgSettings.LogLevel__c = 'INFO';
 		insert orgSettings;
 

sfdx-source/apex-extensions/tests/classes/logger/fflib_LoggerTest.cls

@@ -96,7 +96,6 @@ private class fflib_LoggerTest
 		// THEN - It should be appended to the logAppender
 		final List<String> result = APPENDER_MOCK
 				.getAppendedMessages(System.LoggingLevel.DEBUG);
-		System.debug(result);
 		System.Assert.areEqual(1, result.size(), 'Expected only one error');
 		System.Assert.isTrue(result.get(0).startsWith(ERROR_MESSAGE_FORMATTED_WITH_EXCEPTION), 'Incorrect returned error message');
 	}