Merge pull request #8683 from SmartyAnsh/BAEL-3758_AOP_Annotations_jcabi-aspects

BAEL-3758 - AOP Annotations of jcabi-aspects

libraries-3/pom.xml

@@ -73,6 +73,18 @@
             <version>${cache2k.version}</version>
             <type>pom</type>
         </dependency>
+        
+        <dependency>
+            <groupId>com.jcabi</groupId>
+            <artifactId>jcabi-aspects</artifactId>
+            <version>${jcabi-aspects.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.aspectj</groupId>
+            <artifactId>aspectjrt</artifactId>
+            <version>${aspectjrt.version}</version>
+            <scope>runtime</scope>
+        </dependency>
     </dependencies>
 
     <repositories>
@@ -81,6 +93,36 @@
             <url>https://jitpack.io</url>
         </repository>
     </repositories>
+    
+    <build>
+        <finalName>libraries-3</finalName>
+        <plugins>
+            <plugin>
+                <groupId>com.jcabi</groupId>
+                <artifactId>jcabi-maven-plugin</artifactId>
+                <version>${jcabi-maven-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>ajc</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.aspectj</groupId>
+                        <artifactId>aspectjtools</artifactId>
+                        <version>${aspectjtools.version}</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>org.aspectj</groupId>
+                        <artifactId>aspectjweaver</artifactId>
+                        <version>${aspectjweaver.version}</version>
+                    </dependency>
+                </dependencies>
+            </plugin>
+        </plugins>
+    </build>
 
     <properties>
         <jcommander.version>1.78</jcommander.version>
@@ -93,5 +135,11 @@
         <cactoos.version>0.43</cactoos.version>
         <airline.version>2.7.2</airline.version>
         <cache2k.version>1.2.3.Final</cache2k.version>
+        
+        <jcabi-aspects.version>0.22.6</jcabi-aspects.version>
+        <aspectjrt.version>1.9.2</aspectjrt.version>
+        <jcabi-maven-plugin.version>0.14.1</jcabi-maven-plugin.version>
+        <aspectjtools.version>1.9.2</aspectjtools.version>
+        <aspectjweaver.version>1.9.2</aspectjweaver.version>
     </properties>
 </project>

libraries-3/src/main/java/com/baeldung/jcabi/JcabiAspectJ.java

@@ -0,0 +1,112 @@
+package com.baeldung.jcabi;
+
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLConnection;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+import com.jcabi.aspects.Async;
+import com.jcabi.aspects.Cacheable;
+import com.jcabi.aspects.LogExceptions;
+import com.jcabi.aspects.Loggable;
+import com.jcabi.aspects.Quietly;
+import com.jcabi.aspects.RetryOnFailure;
+import com.jcabi.aspects.UnitedThrow;
+
+public class JcabiAspectJ {
+
+    public static void main(String[] args) {
+        try {
+            displayFactorial(10);
+            getFactorial(10).get();
+
+            String result = cacheExchangeRates();
+            if (result != cacheExchangeRates()) {
+                System.out.println(result);
+            }
+
+            divideByZero();
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+
+        divideByZeroQuietly();
+        try {
+            processFile();  
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    @Loggable
+    @Async
+    public static void displayFactorial(int number) {
+        long result = factorial(number);
+        System.out.println(result);
+    }
+
+    @Loggable
+    @Async
+    public static Future<Long> getFactorial(int number) {
+        Future<Long> factorialFuture = CompletableFuture.supplyAsync(() -> factorial(number));
+        return factorialFuture;
+    }
+
+    /**
+     * Finds factorial of a number
+     * @param number
+     * @return
+     */
+    public static long factorial(int number) {
+        long result = 1; 
+        for(int i=number;i>0;i--) {
+            result *= i; 
+        } 
+        return result; 
+    }
+
+    @Loggable
+    @Cacheable(lifetime = 2, unit = TimeUnit.SECONDS)
+    public static String cacheExchangeRates() {
+        String result = null;
+        try {
+            URL exchangeRateUrl = new URL("https://api.exchangeratesapi.io/latest");
+            URLConnection con = exchangeRateUrl.openConnection();
+            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
+            result = in.readLine();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return result;
+    }
+
+    @LogExceptions
+    public static void divideByZero() {
+        int x = 1/0;
+    }
+
+    @RetryOnFailure(attempts = 2, types = {java.lang.NumberFormatException.class})
+    @Quietly
+    public static void divideByZeroQuietly() {
+        int x = 1/0;
+    }
+
+    @UnitedThrow(IllegalStateException.class)
+    public static void processFile() throws IOException, InterruptedException {
+        BufferedReader reader = new BufferedReader(new FileReader("baeldung.txt"));
+        reader.readLine();
+        
+        Thread thread = new Thread();
+        thread.wait(2000);
+    }
+
+}