1 files changed, 0 insertions, 131 deletions
diff --git a/common/testutils/devicetests/com/android/testutils/async/RateLimiter.java b/common/testutils/devicetests/com/android/testutils/async/RateLimiter.java
deleted file mode 100644
index d5cca0a4..00000000
--- a/common/testutils/devicetests/com/android/testutils/async/RateLimiter.java
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2023 The Android Open Source Project
- *
- * 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 com.android.testutils.async;
-
-import com.android.net.module.util.async.OsAccess;
-
-import java.util.Arrays;
-
-/**
- * Limits the number of bytes processed to the given maximum of bytes per second.
- *
- * The limiter tracks the total for the past second, along with sums for each 10ms
- * in the past second, allowing the total to be adjusted as the time passes.
- */
-public final class RateLimiter {
-    private static final int PERIOD_DURATION_MS = 1000;
-    private static final int BUCKET_COUNT = 100;
-
-    public static final int BUCKET_DURATION_MS = PERIOD_DURATION_MS / BUCKET_COUNT;
-
-    private final OsAccess mOsAccess;
-    private final int[] mStatBuckets = new int[BUCKET_COUNT];
-    private int mMaxPerPeriodBytes;
-    private int mMaxPerBucketBytes;
-    private int mRecordedPeriodBytes;
-    private long mLastLimitTimestamp;
-    private int mLastRequestReduction;
-
-    public RateLimiter(OsAccess osAccess, int bytesPerSecond) {
-        mOsAccess = osAccess;
-        setBytesPerSecond(bytesPerSecond);
-        clear();
-    }
-
-    public int getBytesPerSecond() {
-        return mMaxPerPeriodBytes;
-    }
-
-    public void setBytesPerSecond(int bytesPerSecond) {
-        mMaxPerPeriodBytes = bytesPerSecond;
-        mMaxPerBucketBytes = Math.max(1, (mMaxPerPeriodBytes / BUCKET_COUNT) * 2);
-    }
-
-    public void clear() {
-        mLastLimitTimestamp = mOsAccess.monotonicTimeMillis();
-        mRecordedPeriodBytes = 0;
-        Arrays.fill(mStatBuckets, 0);
-    }
-
-    public static int limit(RateLimiter limiter1, RateLimiter limiter2, int requestedBytes) {
-        final long now = limiter1.mOsAccess.monotonicTimeMillis();
-        final int allowedCount = Math.min(limiter1.calculateLimit(now, requestedBytes),
-            limiter2.calculateLimit(now, requestedBytes));
-        limiter1.recordBytes(now, requestedBytes, allowedCount);
-        limiter2.recordBytes(now, requestedBytes, allowedCount);
-        return allowedCount;
-    }
-
-    public int limit(int requestedBytes) {
-        final long now = mOsAccess.monotonicTimeMillis();
-        final int allowedCount = calculateLimit(now, requestedBytes);
-        recordBytes(now, requestedBytes, allowedCount);
-        return allowedCount;
-    }
-
-    public int getLastRequestReduction() {
-        return mLastRequestReduction;
-    }
-
-    public boolean acceptAllOrNone(int requestedBytes) {
-        final long now = mOsAccess.monotonicTimeMillis();
-        final int allowedCount = calculateLimit(now, requestedBytes);
-        if (allowedCount < requestedBytes) {
-            return false;
-        }
-        recordBytes(now, requestedBytes, allowedCount);
-        return true;
-    }
-
-    private int calculateLimit(long now, int requestedBytes) {
-        // First remove all stale bucket data and adjust the total.
-        final long currentBucketAbsIdx = now / BUCKET_DURATION_MS;
-        final long staleCutoffIdx = currentBucketAbsIdx - BUCKET_COUNT;
-        for (long i = mLastLimitTimestamp / BUCKET_DURATION_MS; i < staleCutoffIdx; i++) {
-            final int idx = (int) (i % BUCKET_COUNT);
-            mRecordedPeriodBytes -= mStatBuckets[idx];
-            mStatBuckets[idx] = 0;
-        }
-
-        final int bucketIdx = (int) (currentBucketAbsIdx % BUCKET_COUNT);
-        final int maxAllowed = Math.min(mMaxPerPeriodBytes - mRecordedPeriodBytes,
-            Math.min(mMaxPerBucketBytes - mStatBuckets[bucketIdx], requestedBytes));
-        return Math.max(0, maxAllowed);
-    }
-
-    private void recordBytes(long now, int requestedBytes, int actualBytes) {
-        mStatBuckets[(int) ((now / BUCKET_DURATION_MS) % BUCKET_COUNT)] += actualBytes;
-        mRecordedPeriodBytes += actualBytes;
-        mLastRequestReduction = requestedBytes - actualBytes;
-        mLastLimitTimestamp = now;
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder sb = new StringBuilder();
-        sb.append("{max=");
-        sb.append(mMaxPerPeriodBytes);
-        sb.append(",max_bucket=");
-        sb.append(mMaxPerBucketBytes);
-        sb.append(",total=");
-        sb.append(mRecordedPeriodBytes);
-        sb.append(",last_red=");
-        sb.append(mLastRequestReduction);
-        sb.append('}');
-        return sb.toString();
-    }
-}