1.enable logging
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
public void send (List 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 notifications = Push.payload(payload, keystore, password, production, devices);
}
4.多线程批量发送推送消息
public void send (List 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 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 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 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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