#415 Ensuring that schema loading is disabled during a preview

src/main/groovy/com/marklogic/gradle/task/PreviewDeployTask.groovy

@@ -1,6 +1,9 @@
 package com.marklogic.gradle.task
 
-
+import com.marklogic.appdeployer.AppDeployer
+import com.marklogic.appdeployer.command.Command
+import com.marklogic.appdeployer.command.modules.LoadModulesCommand
+import com.marklogic.appdeployer.command.schemas.LoadSchemasCommand
 import com.marklogic.appdeployer.command.security.DeployRolesCommand
 import com.marklogic.appdeployer.impl.SimpleAppDeployer
 import com.marklogic.mgmt.util.ObjectMapperFactory
@@ -16,32 +19,58 @@ class PreviewDeployTask extends DeployAppTask {
 
 	@TaskAction
 	void deployApp() {
+		modifyAppConfigBeforePreview()
+		modifyAppDeployerBeforePreview()
+
+		PreviewInterceptor interceptor = configurePreviewInterceptor()
+
+		super.deployApp()
+
+		println "\nPREVIEW OF DEPLOYMENT:\n"
+		println ObjectMapperFactory.getObjectMapper().writeValueAsString(interceptor.getResults())
+	}
+
+	void modifyAppConfigBeforePreview() {
 		// Disable loading of any modules
 		getAppConfig().setModulePaths(new ArrayList<String>())
 
-		// Disable loading of any schemas
+		// Disable loading of schemas from the default path
+		// Database-specific schema paths are handled by removing instances of LoadSchemasCommand
 		getAppConfig().setSchemasPath(null)
+	}
+
+	void modifyAppDeployerBeforePreview() {
+		AppDeployer deployer = getAppDeployer()
 
-		SimpleAppDeployer deployer = getAppDeployer()
+		if (deployer instanceof SimpleAppDeployer) {
+			SimpleAppDeployer simpleAppDeployer = (SimpleAppDeployer) deployer
 
-		// Loading roles in two phases breaks the preview feature, so it's disabled
-		DeployRolesCommand deployRolesCommand = deployer.getCommandOfType(DeployRolesCommand.class)
-		if (deployRolesCommand != null) {
-			deployRolesCommand.setDeployRolesInTwoPhases(false)
+			List<Command> newCommands = new ArrayList<>()
+			for (Command c : simpleAppDeployer.getCommands()) {
+				if (c instanceof LoadSchemasCommand || c instanceof LoadModulesCommand) {
+					// Don't include these; no need to load schemas or modules during a preview
+				}
+				// Loading roles in two phases breaks the preview feature, so it's disabled
+				else if (c instanceof DeployRolesCommand) {
+					DeployRolesCommand deployRolesCommand = (DeployRolesCommand) c
+					deployRolesCommand.setDeployRolesInTwoPhases(false)
+					newCommands.add(c)
+				} else {
+					newCommands.add(c)
+				}
+			}
+			simpleAppDeployer.setCommands(newCommands)
 		}
+	}
 
+	PreviewInterceptor configurePreviewInterceptor() {
 		PreviewInterceptor interceptor = new PreviewInterceptor(getManageClient())
 		getManageClient().getRestTemplate().getInterceptors().add(interceptor)
 		getManageClient().getRestTemplate().setErrorHandler(interceptor)
 		if (getManageClient().getRestTemplate() != getManageClient().getSecurityUserRestTemplate()) {
 			getManageClient().getSecurityUserRestTemplate().getInterceptors().add(interceptor)
 			getManageClient().getSecurityUserRestTemplate().setErrorHandler(interceptor)
 		}
-
-		super.deployApp()
-
-		println "\nPREVIEW OF DEPLOYMENT:\n"
-		println ObjectMapperFactory.getObjectMapper().writeValueAsString(interceptor.getResults())
+		return interceptor
 	}
-
 }