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Commit 27ca2687 authored by Brad Ebinger's avatar Brad Ebinger
Browse files

Adds ERROR state to ImsConfig 

Adds the ERROR return state for bool provisioning values
so that we can throw an Exception in some cases.

Bug: 64540800
Test: Manual
Change-Id: I0b79837c694d245999031ec65783857e114b7c75
parent 54f40fa1

telephony/java/com/android/ims/ImsConfig.java

+1 −0
Original line number Diff line number Diff line
@@ -524,6 +524,7 @@ public class ImsConfig { 
    * Defines IMS feature value.

    */

    public static class FeatureValueConstants {

        public static final int ERROR = -1;

        public static final int OFF = 0;

        public static final int ON = 1;

    }

telephony/java/com/android/internal/telephony/ExponentialBackoff.java

0 → 100644
+84 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 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.internal.telephony;



import android.annotation.NonNull;

import android.os.Handler;

import android.os.Looper;



/** The implementation of exponential backoff with jitter applied. */

public class ExponentialBackoff {

    private int mRetryCounter;

    private long mStartDelayMs;

    private long mMaximumDelayMs;

    private long mCurrentDelayMs;

    private int mMultiplier;

    private Runnable mRunnable;

    private Handler mHandler;



    public ExponentialBackoff(

            long initialDelayMs,

            long maximumDelayMs,

            int multiplier,

            @NonNull Looper looper,

            @NonNull Runnable runnable) {

        this(initialDelayMs, maximumDelayMs, multiplier, new Handler(looper), runnable);

    }



    public ExponentialBackoff(

            long initialDelayMs,

            long maximumDelayMs,

            int multiplier,

            @NonNull Handler handler,

            @NonNull Runnable runnable) {

        mRetryCounter = 0;

        mStartDelayMs = initialDelayMs;

        mMaximumDelayMs = maximumDelayMs;

        mMultiplier = multiplier;

        mHandler = handler;

        mRunnable = runnable;

    }



    /** Starts the backoff, the runnable will be executed after {@link #mStartDelayMs}. */

    public void start() {

        mRetryCounter = 0;

        mCurrentDelayMs = mStartDelayMs;

        mHandler.removeCallbacks(mRunnable);

        mHandler.postDelayed(mRunnable, mCurrentDelayMs);

    }



    /** Stops the backoff, all pending messages will be removed from the message queue. */

    public void stop() {

        mRetryCounter = 0;

        mHandler.removeCallbacks(mRunnable);

    }



    /** Should call when the retry action has failed and we want to retry after a longer delay. */

    public void notifyFailed() {

        mRetryCounter++;

        long temp = Math.min(

                mMaximumDelayMs, (long) (mStartDelayMs * Math.pow(mMultiplier, mRetryCounter)));

        mCurrentDelayMs = (long) (((1 + Math.random()) / 2) * temp);

        mHandler.removeCallbacks(mRunnable);

        mHandler.postDelayed(mRunnable, mCurrentDelayMs);

    }



    /** Returns the delay for the most recently posted message. */

    public long getCurrentDelay() {

        return mCurrentDelayMs;

    }

}