move package name

src/main/java/io/socket/backo/Backoff.java

@@ -0,0 +1,54 @@
+package io.socket.backo;
+
+public class Backoff {
+
+    private long ms = 100;
+    private long max = 10000;
+    private int factor = 2;
+    private double jitter = 0.0;
+    private int attempts = 0;
+
+    public Backoff() {}
+
+    public long duration() {
+        long ms = this.ms * (long) Math.pow(this.factor, this.attempts++);
+        if (jitter != 0.0) {
+            double rand = Math.random();
+            int deviation = (int) Math.floor(rand * this.jitter * ms);
+            ms = (((int) Math.floor(rand * 10)) & 1) == 0 ? ms - deviation : ms + deviation;
+        }
+        if (ms < this.ms) {
+            // overflow happened
+            ms = Long.MAX_VALUE;
+        }
+        return Math.min(ms, this.max);
+    }
+
+    public void reset() {
+        this.attempts = 0;
+    }
+
+    public Backoff setMin(long min) {
+        this.ms = min;
+        return this;
+    }
+
+    public Backoff setMax(long max) {
+        this.max = max;
+        return this;
+    }
+
+    public Backoff setFactor(int factor) {
+        this.factor = factor;
+        return this;
+    }
+
+    public Backoff setJitter(double jitter) {
+        this.jitter = jitter;
+        return this;
+    }
+
+    public int getAttempts() {
+        return this.attempts;
+    }
+}