sample-services/ics-producer-consumer/consumer/src/main/java/com/demo/consumer/controllers/ThreadsController.java

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  *
   5  * Copyright (C) 2024: OpenInfra Foundation Europe
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ========================LICENSE_END===================================
  19  */
  20
  21 package com.demo.consumer.controllers;
  22
  23 import java.util.concurrent.CompletableFuture;
  24
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27 import org.springframework.beans.factory.annotation.Autowired;
  28 import org.springframework.scheduling.annotation.Async;
  29 import org.springframework.web.bind.annotation.GetMapping;
  30 import org.springframework.web.bind.annotation.PathVariable;
  31 import org.springframework.web.bind.annotation.RestController;
  32
  33 import com.demo.consumer.consumer.SimpleConsumer;
  34 import com.demo.consumer.messages.ApplicationMessageHandlerImpl;
  35
  36 @RestController
  37 public class ThreadsController {
  38     private static final Logger log = LoggerFactory.getLogger(ThreadsController.class);
  39
  40     @Autowired
  41     private SimpleConsumer simpleConsumer;
  42
  43     private Thread consumerThread;
  44
  45     @Async
  46     @GetMapping("/startConsumer/{topicName}")
  47     public CompletableFuture<String> startConsumer(@PathVariable("topicName") String topicName) {
  48         try {
  49             Thread consumerThread = new Thread(() -> {
  50                 try {
  51                     simpleConsumer.runAlways(topicName, new ApplicationMessageHandlerImpl());
  52                 } catch (Exception e) {
  53                     log.error("Error starting consuming on: " + topicName, e.getMessage());
  54                 }
  55             });
  56             consumerThread.start();
  57             return CompletableFuture.completedFuture("Consumer started for topic: " + topicName);
  58         } catch (Exception e) {
  59             return CompletableFuture.failedFuture(e);
  60         }
  61     }
  62
  63     @GetMapping("/stopConsumer")
  64     public String stopConsumer() {
  65         if (consumerThread != null && consumerThread.isAlive()) {
  66             try {
  67                 simpleConsumer.shutdown();
  68             } catch (Exception e) {
  69                 log.error("Error stopping consumer Thread", e.getMessage());
  70             }
  71             return "Consumer stopped successfully";
  72         } else {
  73             return "No active consumer to stop";
  74         }
  75     }
  76
  77     @GetMapping("/listen/{numberOfMessages}/on/{topicName}")
  78     public CompletableFuture<String> listenMessage(@PathVariable int numberOfMessages, @PathVariable String topicName) {
  79         try {
  80             Thread consumerThread = new Thread(() -> {
  81                 try {
  82                     simpleConsumer.run(topicName, numberOfMessages, new ApplicationMessageHandlerImpl());
  83                 } catch (Exception e) {
  84                     log.error("Error starting consuming on: " + topicName, e.getMessage());
  85                 }
  86             });
  87             consumerThread.start();
  88             return CompletableFuture.completedFuture("Consumer started for topic: " + topicName);
  89         } catch (Exception e) {
  90             return CompletableFuture.failedFuture(e);
  91         }
  92     }
  93 }