Template external list url example

The following shows the fulfilled request in Postman. This difference from the generated POJO is important. The endpoint does not return a CovidTotal, but rather, an array of CovidTotal instances, albeit an array containing a single instance. The application. It passes the path to the Spring configuration file. Of course, the file need not be named application. As these could change, a convenient location for these parameters is the application.

As you see in the next section, you are parameterizing both the header name and value. The Value annotation is used by Spring to inject values using expressions. The Component annotation indicates the CovidTotal class is a component and should be auto-scanned by Spring on application startup Javadoc.

The HttpHeaders instance is then passed to an HttpEntity class. Above, we set the type to String, and omitted the String when constructing the HttpEntity class, although we could have just as easily constructed it with an empty String class. For example, above, we used the exchange method and passed a URL as a string, an indicator that we wish the template to make a GET request, and the expected result class. The ResponseEntity class type parameter matches the class specified as a parameter in the exchange method.

This response is an array, indicated by the opening and closing square braces, containing a generic object with the confirmed, recovered, critical, and deaths properties. As this array only contains one CovidTotal instance, we only requested the first element.

Note: As of Spring 5. The test is not extensive, but it prints the results and ensures that the confirmed cases are greater than zero. The SpringBootTest annotation Javadoc indicates to Spring that the class is a test class that executes unit tests. The Test annotation marks the method as a test case for JUnit.

We can, therefore, use Maven to build the application and run the unit tests. After compiling and packaging the application as a Jar, Maven should run the unit test, and print the following output to the command-line.

The getCountryDataByName endpoint returns totals for the country requested by a query string parameter. A query string assigns values to parameters attached to a URL. The question mark indicates the addition of one or more query string parameters while the ampersand separates multiple parameters. Notice that the class generated has different data types for confirmed and recovered variables than the class generated in the previous section.

Although in a production application, you should change the types for consistency, in this tutorial, leave the variable types as is. In the URI path template, we add one or more placeholders by using curly braces to surround the variable name. At run-time, the variables are replaced with the appropriate value. There are slight differences; however, they are different Java classes.

Be aware of this difference when working with them in Java code. The endpoints we wish to use are the Upload Image and Generate meme endpoints; however, the Upload image endpoint generates an error if someone previously uploaded an image of the same name. Therefore, we must ensure an image of the same name does not already exist if we wish to avoid an exception. To ensure image name uniqueness, we first call the Get images REST endpoint and check if the name exists in the returned image name array.

There are no query string parameters. In the code above, we passed a String array to the RestTemplate exchange method as the class type returned by the endpoint. We then loaded the array into a Stream and filtered the stream for a matching name. To deploy complex solutions, you can break your Azure Resource Manager template ARM template into many related templates, and then deploy them together through a main template. The related templates can be separate files or template syntax that is embedded within the main template.

This article uses the term linked template to refer to a separate template file that is referenced via a link from the main template. It uses the term nested template to refer to embedded template syntax within the main template. For small to medium solutions, a single template is easier to understand and maintain.

You can see all the resources and values in a single file. For advanced scenarios, linked templates enable you to break down the solution into targeted components. You can easily reuse these templates for other scenarios. For a tutorial, see Tutorial: Deploy a linked template. For linked or nested templates, you can only set the deployment mode to Incremental. However, the main template can be deployed in complete mode. If you deploy the main template in the complete mode, and the linked or nested template targets the same resource group, the resources deployed in the linked or nested template are included in the evaluation for complete mode deployment.

The combined collection of resources deployed in the main template and linked or nested templates is compared against the existing resources in the resource group. Any resources not included in this combined collection are deleted. If the linked or nested template targets a different resource group, that deployment uses incremental mode.

To nest a template, add a deployments resource to your main template. In the template property, specify the template syntax. When using a nested template, you can specify whether template expressions are evaluated within the scope of the parent template or the nested template.

The scope determines how parameters, variables, and functions like resourceGroup and subscription are resolved. You set the scope through the expressionEvaluationOptions property. By default, the expressionEvaluationOptions property is set to outer , which means it uses the parent template scope. Set the value to inner to cause expressions to be evaluated within the scope of the nested template. When scope is set to outer , you can't use the reference function in the outputs section of a nested template for a resource you have deployed in the nested template.

To return the values for a deployed resource in a nested template, either use inner scope or convert your nested template to a linked template. The following template demonstrates how template expressions are resolved according to the scope. It contains a variable named exampleVar that is defined in both the parent template and the nested template. It returns the value of the variable. The value of exampleVar changes depending on the value of the scope property in expressionEvaluationOptions.

The following table shows the results for both scopes. The following example deploys a SQL server and retrieves a key vault secret to use for the password. The scope is set to inner because it dynamically creates the key vault ID see adminPassword.

Be careful when using secure parameter values in a nested template. If you set the scope to outer, the secure values are stored as plain text in the deployment history. A user viewing the template in the deployment history could see the secure values. Instead use the inner scope or add to the parent template the resources that need secure values. To link a template, add a deployments resource to your main template.

In the templateLink property, specify the URI of the template to include. The following example links to a template that is in a storage account. When referencing a linked template, the value of uri can't be a local file or a file that is only available on your local network. Azure Resource Manager must be able to access the template. You get an error if the list function refers to a resource that doesn't exist.

Use the if function to make sure the function is only evaluated when the resource is being deployed. See the if function for a sample template that uses if and list with a conditionally deployed resource. The following example uses listKeys when setting a value for deployment scripts. The next example shows a list function that takes a parameter. In this case, the function is listAccountSas. Pass an object for the expiry time. The expiry time must be in the future.

Determines whether a resource type supports zones for the specified location or region. This function only supports zonal resources. Zone redundant services return an empty array. For more information, see Azure Services that support Availability Zones. An array with the supported zones. When using the default values for offset and numberOfZones , a resource type and region that supports zones returns the following array:.

When the resource type or region doesn't support zones, an empty array is returned. An empty array is also returned for zone redundant services. There are different categories for Azure Availability Zones - zonal and zone-redundant. The pickZones function can be used to return an availability zone for a zonal resource.

For zone redundant services ZRS , the function returns an empty array. Zonal resources typically have a zones property at the top level of the resource definition. To determine the category of support for availability zones, see Azure Services that support Availability Zones.

To determine if a given Azure region or location supports availability zones, call the pickZones function with a zonal resource type, such as Microsoft. If the response isn't empty, the region supports availability zones. You can use the response from pickZones to determine whether to provide null for zones or assign virtual machines to different zones. The following example sets a value for the zone based on the availability of zones. The following example shows how to use the pickZones function to enable zone redundancy for Cosmos DB.

The providers function has been deprecated. We no longer recommend using it. If you used this function to get an API version for the resource provider, we recommend that you provide a specific API version in your template. Using a dynamically returned API version can break your template if the properties change between versions.

Every resource type returns different properties for the reference function. The function doesn't return a single, predefined format. Also, the returned value differs based on the value of the 'Full' argument. To see the properties for a resource type, return the object in the outputs section as shown in the example. The reference function retrieves the runtime state of either a previously deployed resource or a resource deployed in the current template.

This article shows examples for both scenarios. Typically, you use the reference function to return a particular value from an object, such as the blob endpoint URI or fully qualified domain name. Use 'Full' when you need resource values that aren't part of the properties schema. For example, to set key vault access policies, get the identity properties for a virtual machine. The reference function can only be used in the properties of a resource definition and the outputs section of a template or deployment.

When used with property iteration , you can use the reference function for input because the expression is assigned to the resource property. You can't use the reference function to set the value of the count property in a copy loop.

You can use to set other properties in the loop. Reference is blocked for the count property because that property must be determined before the reference function is resolved. If you use the reference function in a resource that is conditionally deployed, the function is evaluated even if the resource isn't deployed.

You get an error if the reference function refers to a resource that doesn't exist. See the if function for a sample template that uses if and reference with a conditionally deployed resource.

By using the reference function, you implicitly declare that one resource depends on another resource if the referenced resource is provisioned within same template and you refer to the resource by its name not resource ID. You don't need to also use the dependsOn property. The function isn't evaluated until the referenced resource has completed deployment. When referencing a resource that is deployed in the same template, provide the name of the resource.

When referencing a resource that isn't deployed in the same template, provide the resource ID and apiVersion. To avoid ambiguity about which resource you're referencing, you can provide a fully qualified resource identifier. When constructing a fully qualified reference to a resource, the order to combine segments from the type and name isn't simply a concatenation of the two.

To simplify the creation of any resource ID, use the resourceId functions described in this document instead of the concat function. Managed identities for Azure resources are extension resource types that are created implicitly for some resources. Because the managed identity isn't explicitly defined in the template, you must reference the resource that the identity is applied to.