IntentService is a base class for {@link Service}s that handle asynchronous
requests (expressed as {@link Intent}s) on demand. Clients send requests
through {@link android.content.Context#startService(Intent)} calls; the
service is started as needed, handles each Intent in turn using a worker
thread, and stops itself when it runs out of work.private final class ServiceHandler extends Handler {
public ServiceHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
onHandleIntent((Intent)msg.obj);
stopSelf(msg.arg1);
}
}
public int onStartCommand(Intent intent, int flags, int startId) {
onStart(intent, startId);
return mRedelivery ? START_REDELIVER_INTENT : START_NOT_STICKY;
}
public void onStart(Intent intent, int startId) {
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = startId;
msg.obj = intent;
mServiceHandler.sendMessage(msg);
}// 创建一个Java Service
public class MyJavaService extends Service {
@Override
public void onCreate() {
super.onCreate();
// 在此处进行初始化操作
// 注册需要的监听器、初始化需要的资源等等
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// 在此处处理Service的逻辑
// 执行系统级别的任务
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
// 在此处释放资源
// 取消注册的监听器、释放占用的资源等等
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
// 不需要绑定操作，返回null即可
return null;
}
}
public class Myservice extends Service{
@Override
public IBinder onBind(Intent intent){
return null;
}
@Override
public int onStartCommand(Intent intent,int flags,int startId){
return super.onStartCommand(intent,flags,startId);
}
@Override
public void onDestroy(){
super.onDestroy();
}
}1. public class Item implements
2. // 所有的属性和getter/setter方法同上，省略
3. public
4. Bid currentMaxBid, Bid currentMinBid)
5. throws
6.
7. // Check highest bid (can also be a different Strategy (pattern))
8. if (currentMaxBid != null && currentMaxBid.getAmount().compareTo(bidAmount) > 0) {
9. throw new BusinessException("Bid too low.");
10. }
11.
12. // Auction is active
13. if
14. throw new BusinessException("Auction is not active yet.");
15.
16. // Auction still valid
17. if ( this.getEndDate().before( new
18. throw new BusinessException("Can't place new bid, auction already ended.");
19.
20. // Create new Bid
21. new Bid(bidAmount, this, bidder);
22.
23. // Place bid for this Item
24. this.getBids.add(newBid); // 请注意这一句，透明的进行了持久化，但是不能在这里调用ItemDao，Item不能对ItemDao产生依赖！
25.
26. return
27. }
28. }public void updateCustomerDeviceAndInstallInfo(long customerId, String channelKey,
String androidId, String imei, String gaId,
String gcmPushToken, String instanceId) {}#修改主机名
hostnamectl set-hostname node2
hostnamectl set-hostname node3public class PlayMusicService extends Activity implements OnClickListener {
private Button playBtn;
private Button stopBtn;
private Button pauseBtn;
private Button exitBtn;
private Button closeBtn;
private Intent intent;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.music_service);
playBtn = (Button) findViewById(R.id.play);
stopBtn = (Button) findViewById(R.id.stop);
pauseBtn = (Button) findViewById(R.id.pause);
exitBtn = (Button) findViewById(R.id.exit);
closeBtn = (Button) findViewById(R.id.close);
playBtn.setOnClickListener(this);
stopBtn.setOnClickListener(this);
pauseBtn.setOnClickListener(this);
exitBtn.setOnClickListener(this);
closeBtn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int op = -1;
intent = new Intent("com.homer.service.musicService");
switch (v.getId()) {
case R.id.play: // play music
op = 1;
break;
case R.id.stop: // stop music
op = 2;
break;
case R.id.pause: // pause music
op = 3;
break;
case R.id.close: // close activity
this.finish();
break;
case R.id.exit: // stopService
op = 4;
stopService(intent);
this.finish();
break;
}
Bundle bundle = new Bundle();
bundle.putInt("op", op);
intent.putExtras(bundle);
startService(intent); // startService
}
@Override
public void onDestroy(){
super.onDestroy();
if(intent != null){
stopService(intent);
}
}
} public class PlayMusicService extends Activity implements OnClickListener {
private Button playBtn;
private Button stopBtn;
private Button pauseBtn;
private Button exitBtn;
private Button closeBtn;
private Intent intent;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.music_service);
playBtn = (Button) findViewById(R.id.play);
stopBtn = (Button) findViewById(R.id.stop);
pauseBtn = (Button) findViewById(R.id.pause);
exitBtn = (Button) findViewById(R.id.exit);
closeBtn = (Button) findViewById(R.id.close);
playBtn.setOnClickListener(this);
stopBtn.setOnClickListener(this);
pauseBtn.setOnClickListener(this);
exitBtn.setOnClickListener(this);
closeBtn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int op = -1;
intent = new Intent("com.homer.service.musicService");
switch (v.getId()) {
case R.id.play: // play music
op = 1;
break;
case R.id.stop: // stop music
op = 2;
break;
case R.id.pause: // pause music
op = 3;
break;
case R.id.close: // close activity
this.finish();
break;
case R.id.exit: // stopService
op = 4;
stopService(intent);
this.finish();
break;
}
Bundle bundle = new Bundle();
bundle.putInt("op", op);
intent.putExtras(bundle);
startService(intent); // startService
}
@Override
public void onDestroy(){
super.onDestroy();
if(intent != null){
stopService(intent);
}
}
} public class PlayMusicService extends Activity implements OnClickListener {
private Button playBtn;
private Button stopBtn;
private Button pauseBtn;
private Button exitBtn;
private Button closeBtn;
private Intent intent;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.music_service);
playBtn = (Button) findViewById(R.id.play);
stopBtn = (Button) findViewById(R.id.stop);
pauseBtn = (Button) findViewById(R.id.pause);
exitBtn = (Button) findViewById(R.id.exit);
closeBtn = (Button) findViewById(R.id.close);
playBtn.setOnClickListener(this);
stopBtn.setOnClickListener(this);
pauseBtn.setOnClickListener(this);
exitBtn.setOnClickListener(this);
closeBtn.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int op = -1;
intent = new Intent("com.homer.service.musicService");
switch (v.getId()) {
case R.id.play: // play music
op = 1;
break;
case R.id.stop: // stop music
op = 2;
break;
case R.id.pause: // pause music
op = 3;
break;
case R.id.close: // close activity
this.finish();
break;
case R.id.exit: // stopService
op = 4;
stopService(intent);
this.finish();
break;
}
Bundle bundle = new Bundle();
bundle.putInt("op", op);
intent.putExtras(bundle);
startService(intent); // startService
}
@Override
public void onDestroy(){
super.onDestroy();
if(intent != null){
stopService(intent);
}
}
} apiVersion: apps/v1 # #与k8s集群版本有关，使用 kubectl api-versions 即可查看当前集群支持的版本
kind: Deployment # 资源类型为Deployment
metadata: # 元数据，即 Deployment 的一些基本属性和信息
name: hello-deployment # Deployment 的名称
labels: # 标签，可以灵活定位一个或多个资源，其中key和value均可自定义，可以定义多组
app: hello # 为该Deployment设置key为app，value为hello的标签
spec: # 这是关于该Deployment的描述
replicas: 3 # 使用该Deployment创建3个应用程序实例
selector: # 标签选择器
matchLabels: # 选择包含标签app:hello的资源
app: hello
template: # 这是选择或创建的Pod的模板
metadata: # Pod的元数据
name: hello # Pod的名称，K8s会在后面加上字符区分不同的Pod
labels: # Pod的标签，上面的selector即选择包含标签app:hello的Pod
app: hello
spec: # 关于该Pod的描述
containers: # container，与docker中的container是同一种
- name: tomcat # container的名称
image: huangxjie/tomcat:0.0.1 # 使用我的测试镜像
ports:
- containerPort: 8080 # 容器访问端口static_configs: 静态服务发现
dns_sd_configs: DNS 服务发现
file_sd_configs: 文件服务发现
consul_sd_configs: Consul 服务发现
serverset_sd_configs: Serverset 服务发现
nerve_sd_configs: Nerve 服务发现
marathon_sd_configs: Marathon 服务发现
kubernetes_sd_configs: Kubernetes 服务发现
gce_sd_configs: GCE 服务发现
ec2_sd_configs: EC2 服务发现
openstack_sd_configs: OpenStack 服务发现
azure_sd_configs: Azure 服务发现
triton_sd_configs: Triton 服务发现apiVersion: apps/v1
kind: Deployment
metadata:
name: pc-deployment
namespace: dev
spec:
replicas: 3
selector:
matchLabels:
app: nginx-pod
template:
metadata:
labels:
app: nginx-pod
spec:
containers:
- name: nginx
image: nginx:1.17.1
ports:
- containerPort: 80
import cn.hutool.core.collection.CollectionUtil; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.integrated.ac.entity.ActivityInfo; import com.integrated.ac.mapper.ActivityInfoMapper; import com.integrated.ac.service.ActivityInfoService; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import com.integrated.dt.entity.Question; import com.integrated.dt.service.QuestionService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * <p> * 服务实现类 * </p> * * @author yan * @since 2021-10-05 */ @Service public class ActivityInfoServiceImpl extends ServiceImpl<ActivityInfoMapper, ActivityInfo> implements ActivityInfoService { @Autowired private QuestionService questionService; @Override public void loadActivityQuestion() { List<ActivityInfo> activityInfoList = this.list(new QueryWrapper<>(new ActivityInfo().setIisEffect(1))); if (CollectionUtil.isNotEmpty(activityInfoList)) { activityInfoList.forEach(activityInfo -> questionService.loadActivityQuestion(activityInfo.getId())); } } }
<span style="font-size:18px;">public class HelloService extends Service {
private Looper mServiceLooper;
private ServiceHandler mServiceHandler;
// 处理从线程收到的消息们
private final class ServiceHandler extends Handler {
public ServiceHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
// 通常我们在这里做一些工作比如下载一个文件
// 在我们的例子中，仅仅是睡５秒钟．
long endTime = System.currentTimeMillis() + 5*1000;
while (System.currentTimeMillis() < endTime) {
synchronized (this) {
try {
wait(endTime - System.currentTimeMillis());
} catch (Exception e) {
}
}
}
// 使用startId停止服务，从而使我们不会在处理
// 另一个工作的中间停止service
stopSelf(msg.arg1);
}
}
@Override
public void onCreate() {
// 启动运行service的线程．注意我创建了一个
// 分离的线程，因为service通常都是在进程的
// 主线程中运行，但我们不想让主线程阻塞．我们还把新线程
// 搞成后台级的优先级，从而减少对UI线程（主线程的影响)．
HandlerThread thread = new HandlerThread("ServiceStartArguments",
Process.THREAD_PRIORITY_BACKGROUND);
thread.start();
// Get the HandlerThread's Looper and use it for our Handler
mServiceLooper = thread.getLooper();
mServiceHandler = new ServiceHandler(mServiceLooper);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();
// 对于每个开始请求，发送一消息来开始一次工作，并且把
// start ID也传过去，所以当完成一个工作时，我们才知道要停止哪个请求．
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = startId;
mServiceHandler.sendMessage(msg);
// 如果我们在这里返回后被被杀死了，重启之．
return START_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
// We don't provide binding, so return null
return null;
}
@Override
public void onDestroy() {
Toast.makeText(this, "service done", Toast.LENGTH_SHORT).show();
}
}
</span>
@Service("baseCacheService")
public class BaseCacheServiceImpl implements BaseCacheService{
}
@Service
public class ShortUrlServiceImpl implements ShortUrlService {
}package com.example.lt.boundservice;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.support.annotation.Nullable;
public class LocalService extends Service{
private String[] names = {"吕布","赵子龙","关羽"};
private IBinder myBinder = new MyBinder();
@Nullable
@Override
public IBinder onBind(Intent intent) {
return myBinder;
}
public class MyBinder extends Binder{
public LocalService getService(){
return LocalService.this;
}
}
public String getName(int postion){
return names[postion];
}
}Interface Servlet -> abstract GenericServlet -> abstract HttpServlet
1.init()
2.getServletConfig()
3.service()
4.getServletInfo()
5.destroy()
