first commit

event-queue/src/main/java/com/iluwatar/event/queue/App.java

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+/**
+ * The MIT License
+ * Copyright (c) 2014-2016 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package com.iluwatar.event.queue;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.UnsupportedAudioFileException;
+
+/**
+ * Event or message queues provide an asynchronous communications protocol, meaning that the sender
+ * and receiver of the message do not need to interact with the message queue at the same time. 
+ * Events or messages placed onto the queue are stored until the recipient retrieves them. Event 
+ * or message queues have implicit or explicit limits on the size of data that may be transmitted
+ * in a single message and the number of messages that may remain outstanding on the queue.
+ * A queue stores a series of notifications or requests in first-in, first-out order.
+ * Sending a notification enqueues the request and returns. The request processor then processes
+ * items from the queue at a later time.
+ */
+public class App {
+  /**
+   * Program entry point.
+   * 
+   * @param args command line args
+   * @throws IOException when there is a problem with the audio file loading
+   * @throws UnsupportedAudioFileException  when the loaded audio file is unsupported 
+   */
+  public static void main(String[] args) throws UnsupportedAudioFileException, IOException {
+    Audio.playSound(getAudioStream("./etc/Bass-Drum-1.wav"), -10.0f);
+    Audio.playSound(getAudioStream("./etc/Closed-Hi-Hat-1.wav"), -8.0f);
+    
+    System.out.println("Press Enter key to stop the program...");
+    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    br.read();
+    Audio.stopService();
+  }
+  
+  public static AudioInputStream getAudioStream(String filePath) 
+      throws UnsupportedAudioFileException, IOException {
+    return AudioSystem.getAudioInputStream(new File(filePath).getAbsoluteFile());
+  }
+}