Added exception handler

blogs-analyzer-ui/src/app/services/blog.service.ts

@@ -1,12 +1,13 @@
 import { Injectable } from '@angular/core';
 import { HttpClient, HttpParams } from '@angular/common/http';
 import { map, Observable } from 'rxjs';
+import { environment } from '../../environments/environment';
 
 @Injectable({
   providedIn: 'root'
 })
 export class BlogService {
-  private baseUrl = 'http://localhost:8888/api';
+  private baseUrl = environment.apiUrl;
 
 
   constructor(private http: HttpClient) {

blogs-analyzer-ui/src/environments/environment.ts

@@ -0,0 +1 @@
+export const environment = { production: false, apiUrl: 'http://localhost:8888/api' };

blogs-analyzer/src/main/java/com/nashtech/blogs/analyzer/controller/WordPressController.java

@@ -1,5 +1,6 @@
 package com.nashtech.blogs.analyzer.controller;
 
+import com.nashtech.blogs.analyzer.exception.PostNotFoundException;
 import com.nashtech.blogs.analyzer.model.Post;
 import org.json.JSONArray;
 import org.json.JSONObject;
@@ -34,6 +35,9 @@ public class WordPressController {
     public ResponseEntity<String> getPostById(@PathVariable Long id) {
         String url = WORDPRESS_API_BASE_URL + "posts/" + id;
         String response = restTemplate.getForObject(url, String.class);
+        if (response == null || response.isEmpty()) {
+            throw new PostNotFoundException("Post with ID " + id + " not found");
+        }
 
         JSONObject jsonResponse = new JSONObject(response);
         String content = jsonResponse.getJSONObject("content").getString("rendered");
@@ -46,6 +50,9 @@ public ResponseEntity<String> searchPosts(@RequestParam(value = "search", requir
         String url = WORDPRESS_API_BASE_URL + "posts?search=" + search;
         String response = restTemplate.getForObject(url, String.class);
         JSONArray postsArray = new JSONArray(response);
+        if (postsArray.isEmpty()) {
+            throw new PostNotFoundException("No posts found with the search term: " + search);
+        }
         StringBuilder renderedContent = new StringBuilder();
 
         for (int i = 0; i < postsArray.length(); i++) {
@@ -62,6 +69,9 @@ public ResponseEntity<String> searchPostsByTitle(@RequestParam String title) {
         String url = WORDPRESS_API_BASE_URL + "posts?search=" + title + "&searchFields=title";
         String response = restTemplate.getForObject(url, String.class);
         JSONArray postsArray = new JSONArray(response);
+        if (postsArray.isEmpty()) {
+            throw new PostNotFoundException("No posts found with the title: " + title);
+        }
         StringBuilder renderedContent = new StringBuilder();
 
         for (int i = 0; i < postsArray.length(); i++) {
@@ -81,6 +91,7 @@ public ResponseEntity<String> getPostsByAuthorId(@RequestParam String authorId)
 
         int page = 1;
         int totalPages = 1;
+        boolean postFound = false;
 
         StringBuilder renderedContent = new StringBuilder();
 
@@ -94,6 +105,7 @@ public ResponseEntity<String> getPostsByAuthorId(@RequestParam String authorId)
             }
 
             for (int i = 0; i < postsArray.length(); i++) {
+                postFound = true;
                 JSONObject post = postsArray.getJSONObject(i);
                 String postId = post.get("id").toString();
                 String title = post.getJSONObject("title").getString("rendered");
@@ -105,7 +117,9 @@ public ResponseEntity<String> getPostsByAuthorId(@RequestParam String authorId)
             }
             page++;
         }
-
+        if (!postFound) {
+            throw new PostNotFoundException("No posts found for author ID: " + authorId);
+        }
         return ResponseEntity.ok(renderedContent.toString());
     }
 
@@ -125,9 +139,12 @@ public ResponseEntity<Map<String, Object>> getAllPosts(
         );
 
         List<Map<String, Object>> postMaps = response.getBody();
+        if (postMaps == null || postMaps.isEmpty()) {
+            throw new PostNotFoundException("No posts found for the given page: " + page);
+        }
         List<Post> posts = new ArrayList<>();
 
-        if (postMaps != null) {
+
             for (Map<String, Object> postMap : postMaps) {
                 Post post = new Post();
                 post.setId(((Number) postMap.get("id")).longValue());
@@ -147,7 +164,7 @@ public ResponseEntity<Map<String, Object>> getAllPosts(
             }
 
             fetchAuthorNames(posts);
-        }
+
 
         HttpHeaders headers = response.getHeaders();
         int totalPosts = Integer.parseInt(Objects.requireNonNull(headers.getFirst("X-WP-Total")));

blogs-analyzer/src/main/java/com/nashtech/blogs/analyzer/exception/GlobalExceptionHandler.java

@@ -0,0 +1,33 @@
+package com.nashtech.blogs.analyzer.exception;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.context.request.WebRequest;
+
+import java.io.IOException;
+
+@ControllerAdvice
+public class GlobalExceptionHandler {
+    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<String> handleGlobalException(Exception ex, WebRequest request) {
+        logger.error("Exception occurred: {}", ex.getMessage(), ex);
+        return new ResponseEntity<>("An error occurred: " + ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+
+    @ExceptionHandler(IOException.class)
+    public ResponseEntity<String> handleIOException(IOException ex, WebRequest request) {
+        logger.error("IOException occurred: {}", ex.getMessage(), ex);
+        return new ResponseEntity<>("An I/O error occurred: " + ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+
+    @ExceptionHandler(PostNotFoundException.class)
+    public ResponseEntity<String> handlePostNotFoundException(PostNotFoundException ex) {
+        return new ResponseEntity<>(ex.getMessage(), HttpStatus.NOT_FOUND);
+    }
+}

blogs-analyzer/src/main/java/com/nashtech/blogs/analyzer/exception/PostNotFoundException.java

@@ -0,0 +1,7 @@
+package com.nashtech.blogs.analyzer.exception;
+
+public class PostNotFoundException extends RuntimeException {
+    public PostNotFoundException(String message) {
+        super(message);
+    }
+}