android fstrim命令,MountServiceIdler.java-优快云博客

* 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;

import java.util.Calendar;

import android.app.ActivityManager;

import android.app.job.JobInfo;

import android.app.job.JobParameters;

import android.app.job.JobScheduler;

import android.app.job.JobService;

import android.content.ComponentName;

import android.content.Context;

import android.os.RemoteException;

import android.util.Slog;

public class MountServiceIdler extends JobService {

private static final String TAG = "MountServiceIdler";

private static ComponentName sIdleService =

new ComponentName("android", MountServiceIdler.class.getName());

private static int MOUNT_JOB_ID = 808;

private boolean mStarted;

private JobParameters mJobParams;

private Runnable mFinishCallback = new Runnable() {

@Override

public void run() {

Slog.i(TAG, "Got mount service completion callback");

synchronized (mFinishCallback) {

if (mStarted) {

jobFinished(mJobParams, false);

mStarted = false;

}

// ... and try again tomorrow

scheduleIdlePass(MountServiceIdler.this);

}

};

@Override

public boolean onStartJob(JobParameters params) {

// First have the activity manager do its idle maintenance. (Yes this job

// is really more than just mount, some day it should be renamed to be system

// idleer).

try {

ActivityManager.getService().performIdleMaintenance();

} catch (RemoteException e) {

}

// The mount service will run an fstrim operation asynchronously

// on a designated separate thread, so we provide it with a callback

// that lets us cleanly end our idle timeslice. It's safe to call

// finishIdle() from any thread.

mJobParams = params;

StorageManagerService ms = StorageManagerService.sSelf;

if (ms != null) {

synchronized (mFinishCallback) {

mStarted = true;

}

ms.runIdleMaint(mFinishCallback);

}

return ms != null;

}

@Override

public boolean onStopJob(JobParameters params) {

// Once we kick off the fstrim we aren't actually interruptible; just note

// that we don't need to call jobFinished(), and let everything happen in

// the callback from the mount service.

StorageManagerService ms = StorageManagerService.sSelf;

if (ms != null) {

ms.abortIdleMaint(mFinishCallback);

synchronized (mFinishCallback) {

mStarted = false;

}

return false;

}

/**

* Schedule the idle job that will ping the mount service

public static void scheduleIdlePass(Context context) {

JobScheduler tm = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);

Calendar calendar = tomorrowMidnight();

final long timeToMidnight = calendar.getTimeInMillis() - System.currentTimeMillis();

JobInfo.Builder builder = new JobInfo.Builder(MOUNT_JOB_ID, sIdleService);

builder.setRequiresDeviceIdle(true);

builder.setRequiresCharging(true);

builder.setMinimumLatency(timeToMidnight);

tm.schedule(builder.build());

}

private static Calendar tomorrowMidnight() {

Calendar calendar = Calendar.getInstance();

calendar.setTimeInMillis(System.currentTimeMillis());

calendar.set(Calendar.HOUR_OF_DAY, 3);

calendar.set(Calendar.MINUTE, 0);

calendar.set(Calendar.SECOND, 0);

calendar.set(Calendar.MILLISECOND, 0);

calendar.add(Calendar.DAY_OF_MONTH, 1);

return calendar;

}

Java程序

122行

4.29 KB

* 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;

import java.util.Calendar;

import android.app.ActivityManager;

import android.app.job.JobInfo;

import android.app.job.JobParameters;

import android.app.job.JobScheduler;

import android.app.job.JobService;

import android.content.ComponentName;

import android.content.Context;

import android.os.RemoteException;

import android.util.Slog;

public class MountServiceIdler extends JobService {

private static final String TAG = "MountServiceIdler";

private static ComponentName sIdleService =

new ComponentName("android", MountServiceIdler.class.getName());

private static int MOUNT_JOB_ID = 808;

private boolean mStarted;

private JobParameters mJobParams;

private Runnable mFinishCallback = new Runnable() {

@Override

public void run() {

Slog.i(TAG, "Got mount service completion callback");

synchronized (mFinishCallback) {

if (mStarted) {

jobFinished(mJobParams, false);

mStarted = false;

}

// ... and try again tomorrow

scheduleIdlePass(MountServiceIdler.this);

}

};

@Override

public boolean onStartJob(JobParameters params) {

// First have the activity manager do its idle maintenance. (Yes this job

// is really more than just mount, some day it should be renamed to be system

// idleer).

try {

ActivityManager.getService().performIdleMaintenance();

} catch (RemoteException e) {

}

// The mount service will run an fstrim operation asynchronously

// on a designated separate thread, so we provide it with a callback

// that lets us cleanly end our idle timeslice. It's safe to call

// finishIdle() from any thread.

mJobParams = params;

StorageManagerService ms = StorageManagerService.sSelf;

if (ms != null) {

synchronized (mFinishCallback) {

mStarted = true;

}

ms.runIdleMaint(mFinishCallback);

}

return ms != null;

}

@Override

public boolean onStopJob(JobParameters params) {

// Once we kick off the fstrim we aren't actually interruptible; just note

// that we don't need to call jobFinished(), and let everything happen in

// the callback from the mount service.

StorageManagerService ms = StorageManagerService.sSelf;

if (ms != null) {

ms.abortIdleMaint(mFinishCallback);

synchronized (mFinishCallback) {

mStarted = false;

}

return false;

}

/**

* Schedule the idle job that will ping the mount service

public static void scheduleIdlePass(Context context) {

JobScheduler tm = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);

Calendar calendar = tomorrowMidnight();

final long timeToMidnight = calendar.getTimeInMillis() - System.currentTimeMillis();

JobInfo.Builder builder = new JobInfo.Builder(MOUNT_JOB_ID, sIdleService);

builder.setRequiresDeviceIdle(true);

builder.setRequiresCharging(true);

builder.setMinimumLatency(timeToMidnight);

tm.schedule(builder.build());

}

private static Calendar tomorrowMidnight() {

Calendar calendar = Calendar.getInstance();

calendar.setTimeInMillis(System.currentTimeMillis());

calendar.set(Calendar.HOUR_OF_DAY, 3);

calendar.set(Calendar.MINUTE, 0);

calendar.set(Calendar.SECOND, 0);

calendar.set(Calendar.MILLISECOND, 0);

calendar.add(Calendar.DAY_OF_MONTH, 1);

return calendar;

}