Configure properties in backing app when updating instance

- As the have to be whitelisted, for now we map only instances,
diskQuota and memory

spring-cloud-app-broker-acceptance-tests/src/test/java/org.springframework.cloud.appbroker.acceptance/UpdateInstanceAcceptanceTest.java

@@ -48,7 +48,9 @@ class UpdateInstanceAcceptanceTest extends CloudFoundryAcceptanceTest {
 		"spring.cloud.appbroker.services[0].apps[0].environment.parameter3=config3",
 		"spring.cloud.appbroker.services[0].apps[0].environment.parameter4=config4",
 		"spring.cloud.appbroker.services[0].apps[0].parameters-transformers[0].name=EnvironmentMapping",
-		"spring.cloud.appbroker.services[0].apps[0].parameters-transformers[0].args.include=parameter1,parameter3"
+		"spring.cloud.appbroker.services[0].apps[0].parameters-transformers[0].args.include=parameter1,parameter3",
+		"spring.cloud.appbroker.services[0].apps[0].parameters-transformers[1].name=PropertyMapping",
+		"spring.cloud.appbroker.services[0].apps[0].parameters-transformers[1].args.include=count"
 	})
 	void deployAppsOnUpdateService() {
 		// given a service instance is created
@@ -72,6 +74,7 @@ class UpdateInstanceAcceptanceTest extends CloudFoundryAcceptanceTest {
 		parameters.put("parameter1", "value1");
 		parameters.put("parameter2", "value2");
 		parameters.put("parameter3", "value3");
+		parameters.put("count", 2);
 		updateServiceInstance(SI_NAME, parameters);
 
 		// then the backing application was updated with zero downtime
@@ -86,6 +89,10 @@ class UpdateInstanceAcceptanceTest extends CloudFoundryAcceptanceTest {
 		assertThat(json.read("$.parameter3").toString()).isEqualTo("value3");
 		assertThat(json.read("$.parameter4").toString()).isEqualTo("config4");
 
+		backingApplication = getApplicationSummary(APP_NAME);
+		assertThat(backingApplication).hasValueSatisfying(app ->
+			assertThat(app.getRunningInstances()).isEqualTo(2));
+
 		// when the service instance is deleted
 		deleteServiceInstance(SI_NAME);
 

spring-cloud-app-broker-deployer-cloudfoundry/src/main/java/org/springframework/cloud/appbroker/deployer/cloudfoundry/CloudFoundryAppDeployer.java

@@ -193,7 +193,7 @@ public class CloudFoundryAppDeployer implements AppDeployer, ResourceLoaderAware
 				.doOnError(e -> logger.warn(String.format("Error getting application %s: %s", name, e.getMessage())))
 				.map(ApplicationDetail::getId)
 				.flatMap(applicationId ->
-					updateApplicationEnvironment(applicationId, environmentVariables).thenReturn(applicationId)
+					updateApplicationEnvironment(applicationId, environmentVariables, request.getProperties()).thenReturn(applicationId)
 				)
 				.flatMap(applicationId -> Mono.zip(Mono.just(applicationId),
 					createPackageForApplication(applicationId)))
@@ -342,12 +342,15 @@ public class CloudFoundryAppDeployer implements AppDeployer, ResourceLoaderAware
 	}
 
 	private Mono<org.cloudfoundry.client.v2.applications.UpdateApplicationResponse> updateApplicationEnvironment(
-		String applicationId, Map<String, Object> environmentVariables) {
+		String applicationId, Map<String, Object> environmentVariables, Map<String, String> properties) {
 		return this.client
 			.applicationsV2()
 			.update(org.cloudfoundry.client.v2.applications.UpdateApplicationRequest
 				.builder()
 				.applicationId(applicationId)
+				.instances(instances(properties))
+				.diskQuota(diskQuota(properties))
+				.memory(memory(properties))
 				.putAllEnvironmentJsons(environmentVariables)
 				.build())
 			.doOnRequest(l -> logger.debug("Updating environment for application {}", applicationId))

spring-cloud-app-broker-deployer-cloudfoundry/src/test/java/org/springframework/cloud/appbroker/deployer/cloudfoundry/CloudFoundryAppDeployerUpdateApplicationTest.java

@@ -16,6 +16,9 @@
 
 package org.springframework.cloud.appbroker.deployer.cloudfoundry;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import org.cloudfoundry.client.CloudFoundryClient;
 import org.cloudfoundry.client.v2.applications.ApplicationsV2;
 import org.cloudfoundry.client.v2.applications.UpdateApplicationResponse;
@@ -46,6 +49,7 @@ import org.cloudfoundry.operations.applications.Applications;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.mockito.junit.jupiter.MockitoSettings;
@@ -118,14 +122,10 @@ class CloudFoundryAppDeployerUpdateApplicationTest {
 
 		appDeployer = new CloudFoundryAppDeployer(deploymentProperties,
 			cloudFoundryOperations, cloudFoundryClient, operationsUtils, targetProperties, resourceLoader);
-	}
 
-	@Test
-	void updateApp() {
 		when(operationsApplications.get(any()))
 			.thenReturn(Mono.just(createApplicationDetail()));
-		when(applicationsV2.update(any()))
-			.thenReturn(Mono.just(UpdateApplicationResponse.builder().build()));
+
 		when(packages.create(any()))
 			.thenReturn(Mono.just(CreatePackageResponse
 				.builder()
@@ -193,6 +193,13 @@ class CloudFoundryAppDeployerUpdateApplicationTest {
 				.createdAt("DATETIME")
 				.id("deployment-id")
 				.build()));
+	}
+
+
+	@Test
+	void updateApp() {
+		when(applicationsV2.update(any()))
+			.thenReturn(Mono.just(UpdateApplicationResponse.builder().build()));
 
 		UpdateApplicationRequest request =
 			UpdateApplicationRequest
@@ -206,6 +213,37 @@ class CloudFoundryAppDeployerUpdateApplicationTest {
 					.verifyComplete();
 	}
 
+	@Test
+	void updateAppProperties() {
+		ArgumentCaptor<org.cloudfoundry.client.v2.applications.UpdateApplicationRequest> updateApplicationRequestCaptor =
+			ArgumentCaptor.forClass(org.cloudfoundry.client.v2.applications.UpdateApplicationRequest.class);
+
+		when(applicationsV2.update(updateApplicationRequestCaptor.capture()))
+			.thenReturn(Mono.just(UpdateApplicationResponse.builder().build()));
+
+		Map<String, String> properties = new HashMap<>();
+		properties.put("count", "2");
+		properties.put("disk", "2G");
+		properties.put("memory", "1G");
+
+		UpdateApplicationRequest request =
+			UpdateApplicationRequest
+				.builder()
+				.name(APP_NAME)
+				.path(APP_PATH)
+				.properties(properties)
+				.build();
+
+		StepVerifier.create(appDeployer.update(request))
+					.assertNext(response -> assertThat(response.getName()).isEqualTo(APP_NAME))
+					.verifyComplete();
+
+		org.cloudfoundry.client.v2.applications.UpdateApplicationRequest updateApplicationRequest = updateApplicationRequestCaptor.getValue();
+		assertThat(updateApplicationRequest.getInstances()).isEqualTo(2);
+		assertThat(updateApplicationRequest.getDiskQuota()).isEqualTo(2048);
+		assertThat(updateApplicationRequest.getMemory()).isEqualTo(1024);
+	}
+
 	private ApplicationDetail createApplicationDetail() {
 		return ApplicationDetail
 			.builder()