services/core/java/com/android/server/pm/IncrementalProgressListener.java

/*
 * Copyright (C) 2021 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.server.pm;

import android.content.pm.IPackageLoadingProgressCallback;

import com.android.server.pm.pkg.PackageStateInternal;

/**
 * Loading progress callback, used to listen for progress changes and update package setting
 */
final class IncrementalProgressListener extends IPackageLoadingProgressCallback.Stub {
    private final String mPackageName;
    private final PackageManagerService mPm;
    IncrementalProgressListener(String packageName, PackageManagerService pm) {
        mPackageName = packageName;
        mPm = pm;
    }

    @Override
    public void onPackageLoadingProgressChanged(float progress) {
        PackageStateInternal packageState = mPm.snapshotComputer()
                .getPackageStateInternal(mPackageName);
        if (packageState == null) {
            return;
        }

        boolean wasLoading = packageState.isLoading();
        // Due to asynchronous progress reporting, incomplete progress might be received
        // after the app is migrated off incremental. Ignore such progress updates.
        if (wasLoading) {
            mPm.commitPackageStateMutation(null, mPackageName,
                    state -> state.setLoadingProgress(progress));
            // Only report the state change when loading state changes from loading to not
            if (Math.abs(1.0f - progress) < 0.00000001f) {
                mPm.commitPackageStateMutation(null, mPackageName,
                        state -> state.setLoadingCompletedTime(System.currentTimeMillis()));
                // Unregister progress listener
                mPm.mIncrementalManager
                        .unregisterLoadingProgressCallbacks(packageState.getPathString());
                // Make sure the information is preserved
                mPm.scheduleWriteSettings();
            }
        }
    }
}