71 lines
2.2 KiB
Java
71 lines
2.2 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.messaging.util;
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import android.os.SystemClock;
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/**
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* A utility timer that logs the execution time of operations
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*/
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public class LoggingTimer {
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private static final int NO_WARN_LIMIT = -1;
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private final String mTag;
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private final String mName;
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private final long mWarnLimitMillis;
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private long mStartMillis;
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public LoggingTimer(final String tag, final String name) {
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this(tag, name, NO_WARN_LIMIT);
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}
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public LoggingTimer(final String tag, final String name, final long warnLimitMillis) {
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mTag = tag;
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mName = name;
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mWarnLimitMillis = warnLimitMillis;
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}
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/**
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* This method should be called at the start of the operation to be timed.
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*/
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public void start() {
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mStartMillis = SystemClock.elapsedRealtime();
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if (LogUtil.isLoggable(mTag, LogUtil.VERBOSE)) {
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LogUtil.v(mTag, "Timer start for " + mName);
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}
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}
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/**
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* This method should be called at the end of the operation to be timed. It logs the time since
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* the last call to {@link #start}
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*/
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public void stopAndLog() {
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final long elapsedMs = SystemClock.elapsedRealtime() - mStartMillis;
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final String logMessage = String.format("Used %dms for %s", elapsedMs, mName);
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LogUtil.save(LogUtil.DEBUG, mTag, logMessage);
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if (mWarnLimitMillis != NO_WARN_LIMIT && elapsedMs > mWarnLimitMillis) {
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LogUtil.w(mTag, logMessage);
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} else if (LogUtil.isLoggable(mTag, LogUtil.VERBOSE)) {
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LogUtil.v(mTag, logMessage);
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}
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}
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}
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