javapns使用的log4j，为确保log的正常工作，在使用过程中添加如下代码：
import org.apache.log4j.*;
...
try {
BasicConfigurator.configure();
...
} catch (Exception e) {
//do sth.
}
log4j.properties中添加：
log4j.logger.javapns=debug
2.sandbox(开发环境)到production(产品环境)迁移的注意事项
两套环境的device?tokens是不同的，在迁移后需要更新device?tokens。
两套环境的certificates也是不同的，需要更新证书。
修复sandbox环境工作，production推送失败的解决方案。http://www.techjini.com/blog/how-we-fixed-production-push-notifications-not-working-while-sandbox-works/3.定制消息内容
class="java" name="code">public void send (List<Device> devices, Object keystore, String password, boolean production) {
/* Build a blank payload to customize */
? ?PushNotificationPayload payload = PushNotificationPayload.complex();
/* Customize the payload */
? ? ?payload.addAlert("Hello World!"); //apple提示消息
? ? ?payload.addCustomDictionary("webview", "http://www.womai.com"); //隐藏参数，用于实现一些定制操作，比如自动跳转。
? ? ?payload.addCustomDictionary("mykey2", 2); // etc.
/* Push your custom payload */
? ? ?List<PushedNotification> notifications = Push.payload(payload, keystore, password, production, devices);
}
?
4.多线程批量发送推送消息public void send (List<Device> devices, Object keystore, String password, boolean production) {
/* Prepare a simple payload to push */
PushNotificationPayload payload = PushNotificationPayload.alert("Hello World!");
/* Decide how many threads you want to create and use */
int threads = 30;
/* Start threads, wait for them, and get a list of all pushed notifications */
List<PushedNotification> notifications = Push.payload(payload, keystore, password, production, threads, devices);
}
?
?备注:以上多线程方法在所有线程执行完后返回，如果不想等线程执行完毕，可以通过在内部创建一个单独的线程：
?(示例：?new?Thread()?{public?void?run()?{...}}.start();).?
5.创建消息队列(连接池)一个队列就是一组连接APNS的多线程连接，队列会动态将消息分发到不同的线程中去。?
public void send (String token, Object keystore, String password, boolean production) {
/* Prepare a simple payload to push */
PushNotificationPayload payload = PushNotificationPayload.alert("Hello World!");
/* Decide how many threads you want your queue to use */
int threads = 30;
/* Create the queue */
PushQueue queue = Push.queue(keystore, password, production, threads);
/* Start the queue (all threads and connections and initiated) */
queue.start();
/* Add a notification for the queue to push */
queue.add(payload, token);
}
? 备注:如果不通过queue.start消息队列，队列会在第一次调用queue.add?的时候启动
5.建议开启EnhancedNotificationFormat? 默认为开启状态，建议开启,开启后可以通过Payload对象获取到更多推送消息的详细信息，例如执行状态，失效时间等。
6.推送状态(错误)管理
1)error-response?packets?????pushedNotification.isSuccessful()?//判断是否推送成功?
????pushedNotification.getException()?//获取详细错误信息，系统中错误不会抛出，以保证多线程的正常运作,错误信息会记录到pushedNotification中。???
示例代码：
? ? List<PushedNotification>?notifications?=?Push.alert("Hello?World!",??????????????????????????????????????????????????????????"keystore.p12",?"keystore_password",?false,?devices);??????????????????????????for?(PushedNotification?notification?:?notifications)?{?????????????????????????????????if?(notification.isSuccessful())?{?????????????????????????????????????????/*?Apple?accepted?the?notification?and?should?deliver?it?*/???????????????????????????????????????????System.out.println("Push?notification?sent?successfully?to:?"?+??????????????????????????????????????????notification.getDevice().getToken());?????????????????????????????????????????/*?Still?need?to?query?the?Feedback?Service?regularly?*/???????????????????????????????????}?else?{?????????????????????????????????????????String?invalidToken?=?notification.getDevice().getToken();?????????????????????????????????????????/*?Add?code?here?to?remove?invalidToken?from?your?database?*/???????????????????????????????????????????/*?Find?out?more?about?what?the?problem?was?*/???????????????????????????????????????????Exception?theProblem?=?notification.getException();?????????????????????????????????????????theProblem.printStackTrace();?????????????????????????????????????????/*?If?the?problem?was?an?error-response?packet?returned?by?Apple,?get?it??????????????????????????????????????????ResponsePacket?theErrorResponse?=?notification.getResponse();?????????????????????????????????????????if?(theErrorResponse?!=?null)?{?????????????????????????????????????????????????System.out.println(theErrorResponse.getMessage());?????????????????????????????????????????}?????????????????????????????????}?????????????????????????}??
2)Feedback?Service?public?class?FeedbackTest?{??
??????public?static?void?main(String[]?args)?{?????????
????????????????List<Device>?inactiveDevices?=?Push.feedback("keystore.p12",?"keystore_password",?false);?????????????????/*?remove?inactive?devices?from?your?own?list?of?devices?*/
????}
备注：Sandbox?Feedback?Service?not?listing?device?after?app?is?removed
???? Delays?involving?the?Feedback?service
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