89 lines
2.8 KiB
Java
89 lines
2.8 KiB
Java
/*
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* Copyright (C) 2010 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.email.data;
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import com.android.email.Email;
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import com.android.email.Throttle;
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import android.content.Context;
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import android.content.CursorLoader;
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import android.net.Uri;
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import android.os.Handler;
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import android.util.Log;
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/**
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* A {@link CursorLoader} variant that throttle auto-requery on content changes using
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* {@link Throttle}.
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*/
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public class ThrottlingCursorLoader extends CursorLoader {
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private final Throttle mThrottle;
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/** Constructor with default timeout */
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public ThrottlingCursorLoader(Context context, Uri uri, String[] projection, String selection,
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String[] selectionArgs, String sortOrder) {
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this(context, uri, projection, selection, selectionArgs, sortOrder,
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Throttle.DEFAULT_MIN_TIMEOUT, Throttle.DEFAULT_MAX_TIMEOUT);
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}
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/** Constructor that takes custom timeout */
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public ThrottlingCursorLoader(Context context, Uri uri, String[] projection, String selection,
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String[] selectionArgs, String sortOrder, int minTimeout, int maxTimeout) {
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super(context, uri, projection, selection, selectionArgs, sortOrder);
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Runnable forceLoadRunnable = new Runnable() {
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@Override
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public void run() {
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forceLoad();
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}
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};
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mThrottle = new Throttle(uri.toString(), forceLoadRunnable, new Handler(),
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minTimeout, maxTimeout);
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}
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private void debugLog(String message) {
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Log.d(Email.LOG_TAG, "ThrottlingCursorLoader: [" + getUri() + "] " + message);
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}
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@Override
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public void startLoading() {
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if (Throttle.DEBUG) debugLog("startLoading");
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mThrottle.cancelScheduledCallback();
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super.startLoading();
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}
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@Override
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public void forceLoad() {
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if (Throttle.DEBUG) debugLog("forceLoad");
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mThrottle.cancelScheduledCallback();
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super.forceLoad();
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}
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@Override
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public void stopLoading() {
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if (Throttle.DEBUG) debugLog("stopLoading");
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mThrottle.cancelScheduledCallback();
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super.stopLoading();
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}
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@Override
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public void onContentChanged() {
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if (Throttle.DEBUG) debugLog("onContentChanged");
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mThrottle.onEvent();
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}
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}
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