1 files changed, 0 insertions, 129 deletions
diff --git a/framework/src/onos/utils/misc/src/main/java/org/onlab/util/SlidingWindowCounter.java b/framework/src/onos/utils/misc/src/main/java/org/onlab/util/SlidingWindowCounter.java
deleted file mode 100644
index 4f0093c0..00000000
--- a/framework/src/onos/utils/misc/src/main/java/org/onlab/util/SlidingWindowCounter.java
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * Copyright 2015 Open Networking Laboratory
- *
- * 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.
- */
-package org.onlab.util;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicLong;
-import java.util.stream.Collectors;
-
-import static com.google.common.base.Preconditions.checkArgument;
-
-/**
- * Maintains a sliding window of value counts. The sliding window counter is
- * initialized with a number of window slots. Calls to #incrementCount() will
- * increment the value in the current window slot. Periodically the window
- * slides and the oldest value count is dropped. Calls to #get() will get the
- * total count for the last N window slots.
- */
-public final class SlidingWindowCounter {
-
-    private volatile int headSlot;
-    private final int windowSlots;
-
-    private final List<AtomicLong> counters;
-
-    private final ScheduledExecutorService background;
-
-    private static final int SLIDE_WINDOW_PERIOD_SECONDS = 1;
-
-    /**
-     * Creates a new sliding window counter with the given total number of
-     * window slots.
-     *
-     * @param windowSlots total number of window slots
-     */
-    public SlidingWindowCounter(int windowSlots) {
-        checkArgument(windowSlots > 0, "Window size must be a positive integer");
-
-        this.windowSlots = windowSlots;
-        this.headSlot = 0;
-
-        // Initialize each item in the list to an AtomicLong of 0
-        this.counters = Collections.nCopies(windowSlots, 0)
-                .stream()
-                .map(AtomicLong::new)
-                .collect(Collectors.toCollection(ArrayList::new));
-
-        background = Executors.newSingleThreadScheduledExecutor();
-        background.scheduleWithFixedDelay(this::advanceHead, 0,
-                                          SLIDE_WINDOW_PERIOD_SECONDS, TimeUnit.SECONDS);
-    }
-
-    /**
-     * Releases resources used by the SlidingWindowCounter.
-     */
-    public void destroy() {
-        background.shutdownNow();
-    }
-
-    /**
-     * Increments the count of the current window slot by 1.
-     */
-    public void incrementCount() {
-        incrementCount(headSlot, 1);
-    }
-
-    /**
-     * Increments the count of the current window slot by the given value.
-     *
-     * @param value value to increment by
-     */
-    public void incrementCount(long value) {
-        incrementCount(headSlot, value);
-    }
-
-    private void incrementCount(int slot, long value) {
-        counters.get(slot).addAndGet(value);
-    }
-
-    /**
-     * Gets the total count for the last N window slots.
-     *
-     * @param slots number of slots to include in the count
-     * @return total count for last N slots
-     */
-    public long get(int slots) {
-        checkArgument(slots <= windowSlots,
-                      "Requested window must be less than the total window slots");
-
-        long sum = 0;
-
-        for (int i = 0; i < slots; i++) {
-            int currentIndex = headSlot - i;
-            if (currentIndex < 0) {
-                currentIndex = counters.size() + currentIndex;
-            }
-            sum += counters.get(currentIndex).get();
-        }
-
-        return sum;
-    }
-
-    void advanceHead() {
-        counters.get(slotAfter(headSlot)).set(0);
-        headSlot = slotAfter(headSlot);
-    }
-
-    private int slotAfter(int slot) {
-        return (slot + 1) % windowSlots;
-    }
-
-}