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 "...
C++SDK的版本說明、使用說明及範例程式碼,Simple Message Queue (formerly MNS):建議下載最新發行的SDK版本以獲得最佳效能。 更新日期 2019-12-16 SDK下載 更新內容 支援Mac平台。 使用需知 Linux系統建議使用g++4.1.2及以上版本,Windows系統需要安裝VS2015。
定义 消息队列(Message Queue)是一种应用间的通信方式,消息发送后可以立即返回,由消息系统来确保消息的可靠传递。消息发布者只管把消息发布到 MQ 中而不用管谁来取,消息使用者只管从 MQ 中取消息而不管是谁发布的。这样发布者和使用者都不用知道对方的存在。 适用场景 异步处理 减少冗长的业务代码(和异步线程相...
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 ...
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...
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){ ...
//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 ...
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),...