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/*
* Copyright (C) 2011 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.providers.contacts;
import com.google.android.collect.Lists;
import android.database.Cursor;
import android.net.Uri;
import android.util.Log;
import java.util.List;
/**
* Cursor wrapper that handles tracking time taken before query result came back and how long
* the cursor was open before it was closed.
*/
public class InstrumentedCursorWrapper extends CrossProcessCursorWrapper {
/**
* Static list of active cursors.
*/
private static List<InstrumentedCursorWrapper> mActiveCursors = Lists.newArrayList();
/**
* Time (ms since epoch) when the cursor was created.
*/
private long mCreationTime;
/**
* Milliseconds after creation at which the query completed (triggered by a getCount or
* any method that moves the cursor).
*/
private long mTimeToQuery;
/**
* The URI being queried in this cursor.
*/
private Uri mUri;
/**
* Log tag to use.
*/
private String mTag;
public InstrumentedCursorWrapper(Cursor cursor, Uri uri, String tag) {
super(cursor);
mCreationTime = System.currentTimeMillis();
mUri = uri;
mTag = tag;
mActiveCursors.add(this);
}
@Override
public int getCount() {
int count = super.getCount();
logQueryTime();
return count;
}
@Override
public boolean moveToFirst() {
boolean result = super.moveToFirst();
logQueryTime();
return result;
}
@Override
public boolean moveToLast() {
boolean result = super.moveToLast();
logQueryTime();
return result;
}
@Override
public boolean move(int offset) {
boolean result = super.move(offset);
logQueryTime();
return result;
}
@Override
public boolean moveToPosition(int position) {
boolean result = super.moveToPosition(position);
logQueryTime();
return result;
}
@Override
public boolean moveToNext() {
boolean result = super.moveToNext();
logQueryTime();
return result;
}
@Override
public boolean moveToPrevious() {
boolean result = super.moveToPrevious();
logQueryTime();
return result;
}
@Override
public void close() {
super.close();
long timeToClose = System.currentTimeMillis() - mCreationTime;
Log.v(mTag, timeToClose + "ms to close for URI " + mUri
+ " (" + (timeToClose - mTimeToQuery) + "ms since query complete)");
mActiveCursors.remove(this);
Log.v(mTag, mActiveCursors.size() + " cursors still open");
}
private void logQueryTime() {
if (mTimeToQuery == 0) {
mTimeToQuery = System.currentTimeMillis() - mCreationTime;
Log.v(mTag, mTimeToQuery + "ms to query URI " + mUri);
}
}
}
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