[BAEL-3463] - Big Queue (eugenp#8517)

data-structures/pom.xml

@@ -12,6 +12,21 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
+    <repositories>
+        <repository>
+            <id>github.release.repo</id>
+            <url>https://raw.github.com/bulldog2011/bulldog-repo/master/repo/releases/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.leansoft</groupId>
+            <artifactId>bigqueue</artifactId>
+            <version>0.7.0</version>
+        </dependency>
+    </dependencies>
+
     <build>
         <pluginManagement>
             <plugins>

data-structures/src/test/java/com/baeldung/bigqueue/BigQueueLiveTest.java

@@ -0,0 +1,82 @@
+package com.baeldung.bigqueue;
+
+import com.leansoft.bigqueue.BigQueueImpl;
+import com.leansoft.bigqueue.IBigQueue;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@RunWith(JUnit4.class)
+public class BigQueueLiveTest {
+
+    private IBigQueue bigQueue;
+
+    @Before
+    public void setup() throws IOException {
+        String queueDir = System.getProperty("user.home");
+        String queueName = "baeldung-queue";
+        bigQueue = new BigQueueImpl(queueDir, queueName);
+    }
+
+    @After
+    public void emptyQueue() throws IOException {
+        bigQueue.removeAll();
+        bigQueue.gc();
+        bigQueue.close();
+    }
+
+    @Test
+    public void whenAddingRecords_ThenTheSizeIsCorrect() throws IOException {
+        for (int i = 1; i <= 100; i++) {
+            bigQueue.enqueue(String.valueOf(i).getBytes());
+        }
+
+        assertEquals(100, bigQueue.size());
+    }
+
+    @Test
+    public void whenAddingRecords_ThenTheyCanBeRetrieved() throws IOException {
+        bigQueue.enqueue(String.valueOf("new_record").getBytes());
+
+        String record = new String(bigQueue.dequeue());
+        assertEquals("new_record", record);
+    }
+
+    @Test
+    public void whenDequeueingRecords_ThenTheyAreConsumed() throws IOException {
+        for (int i = 1; i <= 100; i++) {
+            bigQueue.enqueue(String.valueOf(i).getBytes());
+        }
+        bigQueue.dequeue();
+
+        assertEquals(99, bigQueue.size());
+    }
+
+    @Test
+    public void whenPeekingRecords_ThenSizeDoesntChange() throws IOException {
+        for (int i = 1; i <= 100; i++) {
+            bigQueue.enqueue(String.valueOf(i).getBytes());
+        }
+        String firstRecord = new String(bigQueue.peek());
+
+        assertEquals("1", firstRecord);
+        assertEquals(100, bigQueue.size());
+    }
+
+    @Test
+    public void whenEmptyingTheQueue_ThenItSizeIs0() throws IOException {
+        for (int i = 1; i <= 100; i++) {
+            bigQueue.enqueue(String.valueOf(i).getBytes());
+        }
+        bigQueue.removeAll();
+
+        assertEquals(0, bigQueue.size());
+    }
+
+}