DMAAP-83 Initial code import

[dmaap/dbcapi.git] / src / main / java / org / onap / dmaap / dbcapi / util / RandomInteger.java

diff --git a/src/main/java/org/onap/dmaap/dbcapi/util/RandomInteger.java b/src/main/java/org/onap/dmaap/dbcapi/util/RandomInteger.java
new file mode 100644 (file)
index 0000000..2909419
--- /dev/null
+++ b/src/main/java/org/onap/dmaap/dbcapi/util/RandomInteger.java
@@ -0,0 +1,61 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * org.onap.dmaap
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dmaap.dbcapi.util;
+
+import java.util.Date;
+// source: http://www.javapractices.com/topic/TopicAction.do?Id=62
+// with some modifications
+import java.util.Random;
+
+
+public final class RandomInteger {
+       private static Random randomGenerator;
+       private int range;
+       
+       public RandomInteger( int r ) {
+               randomGenerator = new Random();
+               randomGenerator.setSeed((new Date()).getTime());
+               range = r;
+       }
+       
+       public int next(){
+               return randomGenerator.nextInt(range);
+       }
+  
+  /** Generate 10 random integers in the range 0..99. */
+  public static final void main(String... aArgs){
+    log("Generating 10 random integers in range 0..99.");
+    RandomInteger ri = new RandomInteger(100);
+    //note a single Random object is reused here
+    
+    for (int idx = 1; idx <= 10; ++idx){
+      int randomInt = ri.next();
+      log("Generated : " + randomInt);
+    }
+    
+    log("Done.");
+  }
+  
+  private static void log(String aMessage){
+    System.out.println(aMessage);
+  }
+}
+