Author: Mike Musgrove
Level: Intermediate
Technologies: JPA, JAX-RS
Summary: The tasks-rs
quickstart demonstrates how to implement a JAX-RS service that uses JPA persistence.
Prerequisites: tasks
Target Product: WildFly
Source: https://github.com/wildfly/quickstart/
The tasks-rs
quickstart demonstrates how to implement a JAX-RS service that uses JPA persistence deployed to WildFly Application Server.
The client uses HTTP to interact with the service. It builds on the tasks quickstart, which provides simple task management with secure login.
The service interface is implemented using JAX-RS. The SecurityContext JAX-RS annotation is used to inject the security details into each REST method.
The application manages User
and Task
JPA entities. A user represents an authenticated principal and is associated with zero or more tasks. Service methods validate that there is an authenticated principal and the first time a principal is seen, a JPA User entity is created to correspond to the principal. JAX-RS annotated methods are provided for associating tasks with this user and for listing and removing tasks.
Note: This quickstart uses the H2 database included with WildFly Application Server 11. It is a lightweight, relational example datasource that is used for examples only. It is not robust or scalable, is not supported, and should NOT be used in a production environment!
Note: This quickstart uses a *-ds.xml
datasource configuration file for convenience and ease of database configuration. These files are deprecated in WildFly and should not be used in a production environment. Instead, you should configure the datasource using the Management CLI or Management Console. Datasource configuration is documented in the Configuration Guide for WildFly Application Server.
The application this project produces is designed to be run on WildFly Application Server 11 or later.
All you need to build this project is Java 8.0 (Java SDK 1.8) or later and Maven 3.3.1 or later. See Configure Maven for WildFly 11 to make sure you are configured correctly for testing the quickstarts.
In the following instructions, replace WILDFLY_HOME
with the actual path to your WildFly installation. The installation path is described in detail here: Use of WILDFLY_HOME and JBOSS_HOME Variables.
This quickstart uses secured management interfaces and requires that you create the following application user to access the running application.
UserName | Realm | Password | Roles |
---|---|---|---|
quickstartUser | ApplicationRealm | quickstartPwd1! | guest |
To add the application user, open a command prompt and type the following command:
For Linux: WILDFLY_HOME/bin/add-user.sh -a -u 'quickstartUser' -p 'quickstartPwd1!' -g 'guest'
For Windows: WILDFLY_HOME\bin\add-user.bat -a -u 'quickstartUser' -p 'quickstartPwd1!' -g 'guest'
If you prefer, you can use the add-user utility interactively. For an example of how to use the add-user utility, see the instructions located here: Add an Application User.
For Linux: WILDFLY_HOME/bin/standalone.sh
For Windows: WILDFLY_HOME\bin\standalone.bat
mvn clean install wildfly:deploy
This will deploy target/tasks-rs.war
to the running instance of the server.
Application resources for this quickstart are prefixed with the URL http://localhost:8080/tasks-rs/ and can be accessed by an HTTP client.
Below you will find instructions to create, display, and delete tasks.
To associate a task called task1
with the user quickstartUser
, you must authenticate as user quickstartUser
and send an HTTP POST request to the url http://localhost:8080/tasks-rs/tasks/title/task1.
To issue the POST command using cURL, type the following command:
curl -i -u 'quickstartUser:quickstartPwd1!' -H "Content-Length: 0" -X POST http://localhost:8080/tasks-rs/tasks/title/task1
You will see the following response:
HTTP/1.1 201 Created
Expires: 0
Cache-Control: no-cache, no-store, must-revalidate
X-Powered-By: Undertow/1
Server: JBoss-EAP/7
Pragma: no-cache
Location: http://localhost:8080/tasks-rs/tasks/id/1
Date: Thu, 20 Aug 2015 17:30:24 GMT
This is what happens when the command is issued:
-i
flag tells cURL to print the returned headers.-u
flag provides the authentication information for the request.-H
flag adds a header to the outgoing request.-X
flag tells cURL which HTTP method to use. The HTTP POST is used to create resources.Location
header of the response contains the URI of the resource representing the newly created task.The final argument to cURL determines the title of the task. Note that this approach is perhaps not very restful but it simplifies this quickstart. A better approach would be to POST to http://localhost:8080/tasks-rs/tasks/title
passing the task title in the body of the request.
To display the XML representation of the newly created resource, issue a GET request on the task URI returned in the Location
header during the create.
curl -H "Accept: application/xml" -u 'quickstartUser:quickstartPwd1!' -X GET http://localhost:8080/tasks-rs/tasks/id/1
The -H
flag tells the server that the client wishes to accept XML content.
Using either of the above GET methods, you should see the following XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<task id="1" ownerName="quickstartUser">
<title>task1</title>
</task>
To obtain a list of all tasks for user quickstartUser
in XML format, authenticate as user quickstartUser
and send an HTTP GET
request to the resource tasks
URL.
To issue a GET using a browser, open a browser and access the following URL. You will be challenged to enter valid authentication credentials.
To list all tasks associated with the user quickstartUser
using cURL, type:
curl -H "Accept: application/xml" -u 'quickstartUser:quickstartPwd1!' -X GET http://localhost:8080/tasks-rs/tasks/title
Using either of the above GET methods, you should see the following XML:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<collection>
<task id="1" ownerName="quickstartUser">
<title>task1</title>
</task>
</collection>
To delete a task, again authenticate as principal quickstartUser
and send an HTTP DELETE request to the URI that represents the task.
To delete the task with id 1
:
curl -i -u 'quickstartUser:quickstartPwd1!' -X DELETE http://localhost:8080/tasks-rs/tasks/id/1
You will see this response:
HTTP/1.1 204 No Content
Expires: 0
Cache-Control: no-cache, no-store, must-revalidate
X-Powered-By: Undertow/1
Server: JBoss-EAP/7
Pragma: no-cache
Date: Thu, 20 Aug 2015 17:32:39 GMT
Now list all tasks associated with user quickstartUser
:
curl -u 'quickstartUser:quickstartPwd1!' -X GET http://localhost:8080/tasks-rs/tasks/title
You will see a response with an empty collection:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<collection/>
JSON is not part of the JAX-RS standard but most JAX-RS implementations do support it. This quickstart can be modified to support JSON by uncommenting a few lines. Look for comment lines containing JSON:
:
Open the pom.xml
file and remove the comments from the dependency with artifactId resteasy-jackson2-provider
.
<!-- JSON: uncomment to include json support (note json is not part of the JAX-RS standard) -->
<!--
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jackson2-provider</artifactId>
<scope>provided</scope>
</dependency>
-->
Open the src/main/java/org/jboss/as/quickstarts/tasksrs/model/Task.java
file and remove the comments from the following two lines.
// import com.fasterxml.jackson.annotation.JsonIgnore;
// @JsonIgnore
Open the src/main/java/org/jboss/as/quickstarts/tasksrs/service/TaskResource.java
file and make sure the GET methods produce "application/json" as well as "application/xml". Again, look for lines beginning with // JSON:
.
// @Produces({ "application/xml", "application/json" })
@Produces({ "application/xml" })
Create a Task as you did for the XML version of this quickstart.
View task resources in JSON media type by specifying the correct Accept header. For example, using the cURL tool, type the following command:
curl -H "Accept: application/json" -u 'quickstartUser:quickstartPwd1!' -X GET http://localhost:8080/tasks-rs/tasks/id/1
You will see the following response:
{"id":1,"title":"task1","ownerName":"quickstartUser"}
Note: You will see the following warnings in the server log. You can ignore these warnings.
WFLYJCA0091: -ds.xml file deployments are deprecated. Support may be removed in a future version.
HHH000431: Unable to determine H2 database version, certain features may not work
mvn wildfly:undeploy
This quickstart provides Arquillian tests. By default, these tests are configured to be skipped as Arquillian tests require the use of a container.
mvn clean verify -Parq-remote
You can also let Arquillian manage the WildFly server by using the arq-managed
profile. For more information about how to run the Arquillian tests, see Run the Arquillian Tests.
You can also start the server and deploy the quickstarts or run the Arquillian tests from Eclipse using JBoss tools. For general information about how to import a quickstart, add a WildFly server, and build and deploy a quickstart, see Use JBoss Developer Studio or Eclipse to Run the Quickstarts.
Be sure to Add an Application User as described above.
If you want to debug the source code of any library in the project, run the following command to pull the source into your local repository. The IDE should then detect it.
mvn dependency:sources