A 32-bit integer, greater than 0, specifying the number of Message Queue messages in a metered batch. When this number of messages is delivered from the broker to the client runtime, delivery is temporarily suspended, allowing any control messages that had been held up to be delivered. Paylo...
MessageQueue queue=me.mQueue;while(true) { Message msg= queue.next();//might block//if (!me.mRun) {//break;//}if(msg !=null) {if(msg.target ==null) {//No target is a magic identifier for the quit message.return; }if(me.mLogging!=null) me.mLogging.println(">>> Dispatching ...
Message msg= queue.next();//might blockif(msg ==null) {//No message indicates that the message queue is quitting.return; }//This must be in a local variable, in case a UI event sets the loggerPrinter logging =me.mLogging;if(logging !=null) { logging.println(">>> Dispatching to "...
Note that the Message Queue administrator has to also create a physical destination on the broker, whose name and type is the same as the destination created here, in order for messaging to happen. For example, if you use this function to create a queue destination called myMailQDest, the ...
//frameworks/base/core/jni/android_os_MessageQueue.cpp static jlong android_os_MessageQueue_nativeInit(JNIEnv* env, jclass clazz) { NativeMessageQueue* nativeMessageQueue = new NativeMessageQueue(); if (!nativeMessageQueue) { jniThrowRuntimeException(env, "Unable to allocate native queue"); ...
msgget()用来创建Message Queue(服务端)或和一个已建立的Message Queue连接(客户端)。key,指定用来生成message id的关键字,msgflag和open()的flags很相似,可用IPC_CREAT, IPC_EXECL, S_IRUSR等。 在服务端,可用IPC_PRIVATE(或0)来指定key值,来生成一个新的Message Queue,或使用指定的key值(32位的无符号数),...
Android 消息机制(Handler,Looper,MessageQueue,Message) android的消息处理有三个核心类:Looper,Handler和Message。其实还有一个Message Queue(消息队列),但是MQ被封装到Looper里面了,Handler扮演了往MQ上添加消息和处理消息的角色(只处理由自己发出的消息),即通知MQ它要执行一个任务(sendMess... ...
//Disposes of the underlying message queue.//Must only be called on the looper thread or the finalizer.privatevoiddispose() {if(mPtr != 0) { nativeDestroy(mPtr); mPtr = 0; }} 销毁队列也需要用到本地方法,此处就不展开了。 3、Handler ...
3mQueue=looper.mQueue; 4mCallback=callback; 5} 6 7publicinterfaceCallback { 8publicbooleanhandleMessage(Message msg); 9} 获取消息:直接通过Message的obtain方法获取一个Message对象。 Java代码 1publicfinalMessage obtainMessage(intwhat,intarg1,intarg2, Object obj){ ...
A C++ version of the simplified message queue component is implemented based on RabbitMQ. In order to learn RabbitMQ, this project encompasses the essence and core functions of a high-performance messaging system, imitates the basic architecture of RabbitMQ, and focuses on the publish-subscribe me...