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/*
* Copyright (C) 2015 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.messaging.util;
import android.os.SystemClock;
/**
* A utility timer that logs the execution time of operations
*/
public class LoggingTimer {
private static final int NO_WARN_LIMIT = -1;
private final String mTag;
private final String mName;
private final long mWarnLimitMillis;
private long mStartMillis;
public LoggingTimer(final String tag, final String name) {
this(tag, name, NO_WARN_LIMIT);
}
public LoggingTimer(final String tag, final String name, final long warnLimitMillis) {
mTag = tag;
mName = name;
mWarnLimitMillis = warnLimitMillis;
}
/**
* This method should be called at the start of the operation to be timed.
*/
public void start() {
mStartMillis = SystemClock.elapsedRealtime();
if (LogUtil.isLoggable(mTag, LogUtil.VERBOSE)) {
LogUtil.v(mTag, "Timer start for " + mName);
}
}
/**
* This method should be called at the end of the operation to be timed. It logs the time since
* the last call to {@link #start}
*/
public void stopAndLog() {
final long elapsedMs = SystemClock.elapsedRealtime() - mStartMillis;
final String logMessage = String.format("Used %dms for %s", elapsedMs, mName);
LogUtil.save(LogUtil.DEBUG, mTag, logMessage);
if (mWarnLimitMillis != NO_WARN_LIMIT && elapsedMs > mWarnLimitMillis) {
LogUtil.w(mTag, logMessage);
} else if (LogUtil.isLoggable(mTag, LogUtil.VERBOSE)) {
LogUtil.v(mTag, logMessage);
}
}
}
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