Question

我们正在使用google cloud messenger进行推送通知。几天前工作正常，但突然间它开始出现异常。

以下是堆栈跟踪

java.lang.IllegalArgumentException：参数不能为null com.google.android.gcm.server.Sender.nonNull（Sender.java:553）at com.google.android.gcm.server.Sender.getString（Sender.java:534）at com.google.android.gcm.server.Sender.sendNoRetry（Sender.java:365）at com.google.android.gcm.server.Sender.send（Sender.java:261）at org.cdac.gist.restws.gcm.GCMSender.sendGCM(GCMSender.java:48）at org.cdac.gist.restws.handlers.GCMAndroidPushHandler.gcmSender（GCMAndroidPushHandler.java:156） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory $ 1.invoke（ResourceMethodInvocationHandlerFactory.java:81）在 org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher $ 1.run（AbstractJavaResourceMethodDispatcher.java:144）在 org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke（AbstractJavaResourceMethodDispatcher.java:161）在 org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider $ TypeOutInvoker.doDispatch（JavaResourceMethodDispatcherProvider.java:205）在 org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch（AbstractJavaResourceMethodDispatcher.java:99）在 org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke（ResourceMethodInvoker.java:389）在 org.glassfish.jersey.server.model.ResourceMethodInvoker.apply（ResourceMethodInvoker.java:347）在 org.glassfish.jersey.server.model.ResourceMethodInvoker.apply（ResourceMethodInvoker.java:102）在 org.glassfish.jersey.server.ServerRuntime $ 2.run（ServerRuntime.java:326）在org.glassfish.jersey.internal.Errors $ 1.call（Errors.java:271）at at org.glassfish.jersey.internal.Errors $ 1.call（Errors.java:267）at org.glassfish.jersey.internal.Errors.process（Errors.java:315）at org.glassfish.jersey.internal.Errors.process（Errors.java:297）at org.glassfish.jersey.internal.Errors.process（Errors.java:267）at org.glassfish.jersey.process.internal.RequestScope.runInScope（RequestScope.java:317）在 org.glassfish.jersey.server.ServerRuntime.process（ServerRuntime.java:305）在 org.glassfish.jersey.server.ApplicationHandler.handle（ApplicationHandler.java:1154）在 org.glassfish.jersey.servlet.WebComponent.serviceImpl（WebComponent.java:471）在 org.glassfish.jersey.servlet.WebComponent.service（WebComponent.java:425）在 org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:383）在 org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:336）在 org.glassfish.jersey.servlet.ServletContainer.service（ServletContainer.java:223）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:292）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在 org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在 org.cdac.gist.restws.security.ClickjackFilter.doFilter（ClickjackFilter.java:64）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:240）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:207）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:212）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:106）在 org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:141）在 org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:79）在 org.apache.catalina.valves.AbstractAccessLogValve.invoke（AbstractAccessLogValve.java:616）在 org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:88）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:528）在 org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1100）在 org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:687）在 org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.doRun（AprEndpoint.java:2508）在 org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.run（AprEndpoint.java:2497）在 java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142）在 java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:617）在 org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）在java.lang.Thread.run（Thread.java:745）

以下是我的源代码

public final static int sendGCM(final String title, final List<String> registrationID)  throws IOException{         
            int status = 0;
            Sender sender = new Sender(apiKey);

            Message message = new Message.Builder()
                // .collapseKey("1")
                .timeToLive(86400)//sets the time of 1 day for GCM to push notifications when android device is off, offline or unavailable
                .delayWhileIdle(true)
                .addData("message", title)              
                .build();                        

            MulticastResult  result = sender.send(message, registrationID, 1);
            System.out.println("Result "+result);
                if(result == null){
                    throw new IOException("Could not send message");                    
                }else{
                    status = 1;
                }

                return status;  
    }

Answer 1

问题是由于GCM支持单条消息最多1,000个收件人

所以我将注册ArrayList分成1000个相等的部分，然后我将消息发送给GCM。现在我可以发送推送通知。

以下是我更新的代码

public final static int sendGCM(final String title, final List<String> registrationID)  throws IOException{         
        int status = 0;
        MulticastResult  result =null;


        for (int start = 0; start < registrationID.size(); start += 1000) {
            int end = Math.min(start + 1000, registrationID.size());
            List<String> sublist = registrationID.subList(start, end);
            System.out.println(sublist);
            Sender sender = new Sender(apiKey);

            Message message = new Message.Builder()
                // .collapseKey("1")
                .timeToLive(86400)//sets the time of 1 day for GCM to push notifications when android device is off, offline or unavailable
                .delayWhileIdle(true)
                .addData("message", title)              
                .build();                        

            result = sender.send(message, sublist, 1);
            System.out.println("Result "+result);
        }
         if(result == null){
                throw new IOException("Could not send message");                    
            }else{
                status = 1;
            }
            return status;  
        }

谷歌云信使

1 个答案: