├── Dockerfile
├── LICENSE
├── README.md
├── pom.xml
└── src
    └── main
        ├── java
            └── com
            │   └── wordpress
            │       └── abhirockzz
            │           └── cdi
            │               └── concutils
            │                   ├── BackgroundTask.java
            │                   ├── JAXRSConfig.java
            │                   ├── TaskStore.java
            │                   ├── TasksResource.java
            │                   └── pojo
            │                       ├── AllTasks.java
            │                       ├── Task.java
            │                       └── TaskState.java
        └── webapp
            └── WEB-INF
                └── beans.xml


/Dockerfile:
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1 | FROM airhacks/payara
2 | ENV WAR javaee-cdi-concurrency-utils.war
3 | COPY target/${WAR} ${DEPLOYMENT_DIR}


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2017 Abhishek Gupta
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/README.md:
--------------------------------------------------------------------------------
 1 | ## To run on Docker
 2 | 
 3 | - Shortcut
 4 | 	- `docker pull abhirockzz/javaee-cdi-concurrency-utils`
 5 | 	- `docker run -it -p 8080:8080 abhirockzz/javaee-cdi-concurrency-utils`
 6 | 
 7 | - Build it yourself using the [`Dockerfile`](https://github.com/abhirockzz/javaee-cdi-concurrency-utils/blob/master/Dockerfile) in the project (it [uses this Payara image](https://hub.docker.com/r/airhacks/payara/) as the base)
 8 | 	- `docker build -t <your tag> .`
 9 | 	- `docker run -it -p 8080:8080 <your tag>` 
10 | 
11 | ## To run
12 | 
13 | - `git clone` the project and execute `mvn clean install`
14 | - Deploy `javaee-cdi-concurrency-utils.war` in `target` directory to any of the [Java EE 7 containers](http://www.oracle.com/technetwork/java/javaee/overview/compatibility-jsp-136984.html)
15 | 
16 | ## To check
17 | 
18 | - execute a HTTP `POST` to `http://localhost:8080/javaee-cdi-concurrency-utils/tasks/` - [this initiates a task](https://github.com/abhirockzz/javaee-cdi-concurrency-utils/blob/master/src/main/java/com/wordpress/abhirockzz/cdi/concutils/TasksResource.java#L27) and returns the task ID
19 | 
20 | ![](https://abhirockzz.files.wordpress.com/2017/04/1.jpg)
21 | 
22 | - execute a HTTP `GET` to `http://localhost:8080/javaee-cdi-concurrency-utils/tasks/<taskID>` - [it will give you a JSON payload](https://github.com/abhirockzz/javaee-cdi-concurrency-utils/blob/master/src/main/java/com/wordpress/abhirockzz/cdi/concutils/TasksResource.java#L40) with the task details
23 | 
24 | ![](https://abhirockzz.files.wordpress.com/2017/04/2.jpg)
25 | 
26 | - `POST` a few more tasks....
27 | - execute a HTTP `GET` to `http://localhost:8080/javaee-cdi-concurrency-utils/tasks/all` [to get a JSON payload of all the tasks](https://github.com/abhirockzz/javaee-cdi-concurrency-utils/blob/master/src/main/java/com/wordpress/abhirockzz/cdi/concutils/TasksResource.java#L50)
28 | 
29 | ![](https://abhirockzz.files.wordpress.com/2017/04/3.jpg)
30 | 


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/pom.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 3 |     <modelVersion>4.0.0</modelVersion>
 4 | 
 5 |     <groupId>com.wordpress.abhirockzz</groupId>
 6 |     <artifactId>javaee-cdi-concurrency-utils</artifactId>
 7 |     <version>1.0</version>
 8 |     <packaging>war</packaging>
 9 | 
10 |     <name>javaee-cdi-concurrency-utils</name>
11 | 
12 |     <properties>
13 |         <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
14 |         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
15 |     </properties>
16 |     
17 |     <dependencies>
18 |         <dependency>
19 |             <groupId>javax</groupId>
20 |             <artifactId>javaee-api</artifactId>
21 |             <version>7.0</version>
22 |             <scope>provided</scope>
23 |         </dependency>
24 |     </dependencies>
25 | 
26 |     <build>
27 |         <finalName>javaee-cdi-concurrency-utils</finalName>
28 |         <plugins>
29 |             <plugin>
30 |                 <groupId>org.apache.maven.plugins</groupId>
31 |                 <artifactId>maven-compiler-plugin</artifactId>
32 |                 <version>3.1</version>
33 |                 <configuration>
34 |                     <source>1.7</source>
35 |                     <target>1.7</target>
36 |                     <compilerArguments>
37 |                         <endorseddirs>${endorsed.dir}</endorseddirs>
38 |                     </compilerArguments>
39 |                 </configuration>
40 |             </plugin>
41 |             <plugin>
42 |                 <groupId>org.apache.maven.plugins</groupId>
43 |                 <artifactId>maven-war-plugin</artifactId>
44 |                 <version>2.3</version>
45 |                 <configuration>
46 |                     <failOnMissingWebXml>false</failOnMissingWebXml>
47 |                 </configuration>
48 |             </plugin>
49 |             <plugin>
50 |                 <groupId>org.apache.maven.plugins</groupId>
51 |                 <artifactId>maven-dependency-plugin</artifactId>
52 |                 <version>2.6</version>
53 |                 <executions>
54 |                     <execution>
55 |                         <phase>validate</phase>
56 |                         <goals>
57 |                             <goal>copy</goal>
58 |                         </goals>
59 |                         <configuration>
60 |                             <outputDirectory>${endorsed.dir}</outputDirectory>
61 |                             <silent>true</silent>
62 |                             <artifactItems>
63 |                                 <artifactItem>
64 |                                     <groupId>javax</groupId>
65 |                                     <artifactId>javaee-endorsed-api</artifactId>
66 |                                     <version>7.0</version>
67 |                                     <type>jar</type>
68 |                                 </artifactItem>
69 |                             </artifactItems>
70 |                         </configuration>
71 |                     </execution>
72 |                 </executions>
73 |             </plugin>
74 |         </plugins>
75 |     </build>
76 | 
77 | </project>
78 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/BackgroundTask.java:
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 1 | package com.wordpress.abhirockzz.cdi.concutils;
 2 | 
 3 | import com.wordpress.abhirockzz.cdi.concutils.pojo.TaskState;
 4 | import com.wordpress.abhirockzz.cdi.concutils.pojo.Task;
 5 | import java.util.Date;
 6 | import java.util.Random;
 7 | import javax.enterprise.context.Dependent;
 8 | import javax.inject.Inject;
 9 | 
10 | @Dependent
11 | public class BackgroundTask implements Runnable {
12 | 
13 |     String taskid;
14 | 
15 |     public void setTaskID(String taskid) {
16 |         this.taskid = taskid;
17 |     }
18 | 
19 |     @Inject
20 |     TaskStore ts;
21 | 
22 |     @Override
23 |     public void run() {
24 |         try {
25 |             System.out.println("Running in thread " + Thread.currentThread().getName());
26 |             Task task = new Task(taskid, TaskState.IN_PROGRESS, new Date(), null);
27 |             ts.addTask(taskid, task);
28 |             long sleep = new Random().nextInt(10000) + 5000;
29 |             System.out.println("sleeping for " + sleep);
30 |             Thread.sleep(sleep);
31 |             System.out.println("Task " + taskid + " completed ......");
32 |             ts.markComplete(taskid);
33 |         } catch (Exception e) {
34 |             System.out.println("Task " + taskid + " failed ......");
35 |             ts.markFailed(taskid);
36 |         }
37 | 
38 |     }
39 | }
40 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/JAXRSConfig.java:
--------------------------------------------------------------------------------
 1 | package com.wordpress.abhirockzz.cdi.concutils;
 2 | 
 3 | import javax.ws.rs.ApplicationPath;
 4 | import javax.ws.rs.core.Application;
 5 | 
 6 | @ApplicationPath("")
 7 | public class JAXRSConfig extends Application{
 8 |     
 9 | }
10 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/TaskStore.java:
--------------------------------------------------------------------------------
 1 | package com.wordpress.abhirockzz.cdi.concutils;
 2 | 
 3 | import com.wordpress.abhirockzz.cdi.concutils.pojo.TaskState;
 4 | import com.wordpress.abhirockzz.cdi.concutils.pojo.Task;
 5 | import java.util.ArrayList;
 6 | import java.util.Date;
 7 | import java.util.List;
 8 | import java.util.Map;
 9 | import java.util.concurrent.ConcurrentHashMap;
10 | import javax.ejb.Lock;
11 | import javax.ejb.LockType;
12 | import javax.inject.Singleton;
13 | 
14 | @Singleton
15 | @Lock(LockType.READ) //change the default concurrency semantic
16 | public class TaskStore {
17 | 
18 |     private Map<String, Task> idToTaskMapping = new ConcurrentHashMap<>();
19 | 
20 |     public void addTask(String taskid, Task task) {
21 |         idToTaskMapping.put(taskid, task);
22 |     }
23 | 
24 |     public Task getTask(String taskid){
25 |         return idToTaskMapping.get(taskid);
26 |     }
27 |     public void markComplete(String taskid){
28 |         Task task = idToTaskMapping.get(taskid);
29 |         task.setEnd(new Date());
30 |         task.setState(TaskState.COMPLETED);
31 |     }
32 |     
33 |      public void markFailed(String taskid){
34 |         Task task = idToTaskMapping.get(taskid);
35 |         task.setEnd(new Date());
36 |         task.setState(TaskState.FAILED);
37 |     }
38 | 
39 |     public List<Task> getAllTasks() {
40 |         List<Task> tasks = new ArrayList<>();
41 |         for(Task task : idToTaskMapping.values()){
42 |             tasks.add(task);
43 |         }
44 |         return tasks;
45 | 
46 |     }
47 | 
48 |     public TaskState getStatusForTask(String taskid) {
49 |         return idToTaskMapping.get(taskid).getState();
50 |     }
51 | }
52 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/TasksResource.java:
--------------------------------------------------------------------------------
 1 | package com.wordpress.abhirockzz.cdi.concutils;
 2 | 
 3 | import com.wordpress.abhirockzz.cdi.concutils.pojo.AllTasks;
 4 | import java.util.UUID;
 5 | import javax.annotation.Resource;
 6 | import javax.enterprise.concurrent.ManagedExecutorService;
 7 | import javax.inject.Inject;
 8 | import javax.ws.rs.GET;
 9 | import javax.ws.rs.POST;
10 | import javax.ws.rs.Path;
11 | import javax.ws.rs.PathParam;
12 | import javax.ws.rs.Produces;
13 | import javax.ws.rs.container.AsyncResponse;
14 | import javax.ws.rs.container.Suspended;
15 | import javax.ws.rs.core.MediaType;
16 | import javax.ws.rs.core.Response;
17 | 
18 | @Path("tasks")
19 | public class TasksResource {
20 | 
21 |     @Resource
22 |     private ManagedExecutorService mes;
23 | 
24 |     @Inject
25 |     private BackgroundTask ht;
26 | 
27 |     @POST
28 |     public void postTask(@Suspended final AsyncResponse resp) {
29 |         String taskid = UUID.randomUUID().toString();
30 |         ht.setTaskID(taskid);
31 | 
32 |         mes.submit(ht);
33 |         System.out.println("submitted task " + taskid);
34 |         resp.resume(Response.accepted(taskid).build());
35 |     }
36 | 
37 |     @Inject
38 |     private TaskStore ts;
39 | 
40 |     @Path("{taskid}")
41 |     @GET
42 |     @Produces(MediaType.APPLICATION_JSON)
43 |     public Response getTask(@PathParam("taskid") String taskid) {
44 |         return Response.ok(ts.getTask(taskid)).build();
45 |     }
46 | 
47 |     @GET
48 |     @Path("all")
49 |     @Produces(MediaType.APPLICATION_JSON)
50 |     public Response getAllTasks() {
51 |         return Response.ok(new AllTasks(ts.getAllTasks())).build();
52 |     }
53 | }
54 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/pojo/AllTasks.java:
--------------------------------------------------------------------------------
 1 | package com.wordpress.abhirockzz.cdi.concutils.pojo;
 2 | 
 3 | import java.util.List;
 4 | import javax.xml.bind.annotation.XmlAccessType;
 5 | import javax.xml.bind.annotation.XmlAccessorType;
 6 | import javax.xml.bind.annotation.XmlRootElement;
 7 | 
 8 | @XmlRootElement
 9 | @XmlAccessorType(XmlAccessType.FIELD)
10 | public class AllTasks {
11 |     List<Task> tasks;
12 | 
13 |     public AllTasks() {
14 |         
15 |     }
16 | 
17 |     public AllTasks(List<Task> tasks) {
18 |         this.tasks = tasks;
19 |     }
20 |     
21 |     
22 | }
23 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/pojo/Task.java:
--------------------------------------------------------------------------------
 1 | package com.wordpress.abhirockzz.cdi.concutils.pojo;
 2 | 
 3 | import java.util.Date;
 4 | import javax.xml.bind.annotation.XmlAccessType;
 5 | import javax.xml.bind.annotation.XmlAccessorType;
 6 | import javax.xml.bind.annotation.XmlRootElement;
 7 | 
 8 | @XmlRootElement
 9 | @XmlAccessorType(XmlAccessType.FIELD)
10 | public class Task {
11 |     private String taskid;
12 |     private TaskState state;
13 |     private Date start;
14 |     private Date end;
15 | 
16 |     public Task() {
17 |     }
18 |     
19 |     
20 |     public Task(String taskid, TaskState state, Date start, Date end) {
21 |         this.taskid = taskid;
22 |         this.state = state;
23 |         this.start = start;
24 |         this.end = end;
25 |     }
26 | 
27 |     @Override
28 |     public String toString() {
29 |         return "Task{" + "taskid=" + taskid + ", state=" + state + ", start=" + start + ", end=" + end + '}';
30 |     }
31 | 
32 |     public void setEnd(Date end) {
33 |         this.end = end;
34 |     }
35 | 
36 |     public TaskState getState() {
37 |         return state;
38 |     }
39 | 
40 |     public void setState(TaskState state) {
41 |         this.state = state;
42 |     }
43 |     
44 |     
45 |     
46 | }
47 | 


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/src/main/java/com/wordpress/abhirockzz/cdi/concutils/pojo/TaskState.java:
--------------------------------------------------------------------------------
1 | package com.wordpress.abhirockzz.cdi.concutils.pojo;
2 | 
3 | public enum TaskState {
4 |     COMPLETED, IN_PROGRESS, FAILED;
5 | }
6 | 


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/src/main/webapp/WEB-INF/beans.xml:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
3 |        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 |        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
5 |        bean-discovery-mode="all">
6 | </beans>
7 | 


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