Google App Engine APNS

Question

Im developing the server side for an iOS app with Google App Engine and JDO in Java, and I just realized that GAE dont support Apple Push Notification Service, and I`m very frus

Answer 1

I use the 3rd-party library notnoop/java-apns. It is easy to use. The only problem you could meet is the thread limitation on the GAE like below java exception:

java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "modifyThreadGroup")

The issue is solved in the version 1.0.0.Beta3 in the maven central. The detail solution is explained in this pull request #162.

So, the example code snippet to prepare and send push notification to APNs is like below, the key to solve the thread limitation is the method withErrorDetectionThreadFactory as below

// Prepare ApnsService
ClassPathResource certificate = new ClassPathResource("aps_production.p12");

ApnsService service = null;
try {
    service = APNS.newService()
      .withErrorDetectionThreadFactory(ThreadManager.currentRequestThreadFactory()) // use GAE currentRequestThreadFactory
      .withCert(certificate.getInputStream(), certificatePassword)
      .withProductionDestination()
      .build();
} catch (InvalidSSLConfig | IOException e) {
    logger.warn("Fail to initialize APNs service");
}

// Send notification
String apnsPayload = APNS.newPayload()
    .alertBody("test alert")
    .badge(1)
    .sound("default")
    .customField("type", "general")
    .build();

service.push(, apnsPayload);