kafka consumer java

classProducterImplementsRunnable {PrivateSyncstack stack; publicproducter (syncstack Stack) { this. Stack =stack; } public voidRun () { for(inti = 0;i) {String Producter= "product" +i; Stack.push (producter); System.out.println ("produced:" +producter); Try{thread.sleep (200); } Catch(interruptedexception E) {//TODO auto-generated Catch blockE.printstacktrace (); } } }}Create a Consumer: public classConsumerI

Crawlerthread, which is to search for files in a file hierarchy that conform to the index criteria and put their names in the work queue. A consumer task is given in Indexerthread, which is to remove the file names from the queue and index them.The example comes from the Java Concurrency Programming combat.class Crawlerthread extends Thread {private final blockingqueueThe producer-

Preface: Recently in learning Java Multi-threading, see Importnew Online has a netizen translation of an article "block queue to achieve producer consumer model". In this article, the blocking queue in Java's concurrent package is used. After reading, implement the blocking queue by itself.(i) PreparationIn multi-threading, producer-consumer issues are a classic

Label:First, the environment One Centos6.5 console Mongo 3.0 kafka_2.11-0.8.2.1 Storm-0.9.5 Zookeeper-3.4.6 Java 1.7 (later because the jar packaged on Mac is not run by the 1.8 compilation, instead Java 1.8) Other environment Temporary Second, the operation starts Start ZookeeperVerify that the configuration is correct, and that the configuration is self-searching

];front = (front + 1)% CH Arbuffer.length;return ch;} /** * Getstringofbuffer: string representation of buffer contents * @return string representation of the buffer ' s contents * */Public Synchronize D String toString () {if (IsEmpty ()) {return ' buffer is empty! ";} StringBuilder bufferstr = new StringBuilder ("Buffer contents:"); int i = Front;while ((i+1)% charbuffer.length! = rear) {BUFFERSTR.A Ppend (Charbuffer[i]); i = (i+1)% Charbuffer.length;} Bufferstr.append (Charbuffer[i]); return

Examples of producer and consumer modes are used to explain the basic Java class methods such as wait, notify, notifyAll, and yypolicyall. Wait (), Policy (), and policyall () are Java-based java. lang. Object methods. General ExplanationWait (): wait for other threads to wake up in the current thread.Y (): Wake up a t

Java multithreading (synchronization and deadlock, producer and consumer issues) First, let's look at the synchronization and deadlock issues: A deadlock means that A owns banana and B owns apple. A said to B: If you give me apple, I will give you banana. B said to a: If you give me banana, I will give you apple. However, both A and B are waiting for the reply from the other party, so the final result is

, - //so the wake-up process is blocked, and if the consumer thread wakes up, the consumer thread starts to work) theSystem.out.println (Thread.CurrentThread (). GetName () + "production of a product current surplus quantity:" +curnum); the Try { theThread.CurrentThread (). Sleep (250);//control the speed of production the -}Catch(interruptedexception e) { th

(container, Producermonitor, consumermonitor)); Thread C2=NewThread (NewConsumer (container, Producermonitor, consumermonitor)); P1.start (); P2.start (); C1.start (); C2.start (); }}At present, the first to write, the temporary operation is not a problem, if there is a problem, please crossing pointed out.Areas to be improved:1. Container there is no better way to implement2. Container can have multiple, so that you can randomly find a usable container assigned to produ

Introduction The producer and consumer problems are classic issues in the thread model:Same time periodIntranet sharingSame bucketAs shown in, if the producer stores data into the space and the consumer uses the data, the following situations may occur if the data is not coordinated: Producer consumer Diagram The storage space is full, and the producer occupies

(); }Because after another thread notifyall, after waking this thread, it is impossible to confirm that the test condition must be met at this time. There is no problem with two threads, but there will be problems with more threads, because you cannot confirm that you are being awakened by the producer thread, and that there may be other threads that have changed the state variable before waking (this is the message in the drop), so there will be an exception. It is therefore necessary t

Kafka officially provided two scripts to manage the topic, including additions and deletions to topic. Where kafka-topics.sh is responsible for the creation and deletion of topic, kafka-configs.sh script is responsible for topic modification and query, but many users are more inclined to use the program API to operate topic. The previous article mentioned how to

　　　　Description of the error:Under the Kafka installation directory, execute $ bin/zookeeper-server-start.sh config/zookeeper.properties Unrecognized VM option ' usecompressedoops 'Error:clould not create the Java vritual machine.ERROR:A Fatal exception has occurres. Program would exit.　　Workaround:Locate bin/kafka-run-class.sh file, use Vim to open, this versio

no oh, there is waiting to be consumed, there is no production data ready to be consumed. - if(s.flag) { the Try { - s.wait (); -}Catch(interruptedexception e) { - //TODO auto-generated Catch block + e.printstacktrace (); - } + } A at //once the flag is marked False, execute the following code - - if(x% 2 = = 0) { -S.name = "

: 15Consumer goods: 3Produced goods: 16Produced goods: 17Produced products: 18Produced goods: 19Consumer goods: 4Produced goods: 20Produced goods: 21Produced goods: 22Produced goods: 23Produced goods: 24No space to store items ......Consumer goods: 5Produced goods: 25Consumer goods: 6Produced goods: 26No space to store items ......Consumer goods: 7Produced goods: 27No space to store items ......

Import java. util. vector; Class test { Private vector Static class Consumer implements runnable {Private test mtestref;Consumer (test T ){Mtestref = T;} Public void run (){Try {For (;;){Synchronized (mtestref ){If (mtestref. mcache. Size ()> 0 ){String item = mtestref. mcache. Get (0 );Mtestref. mcache. Remove (0 );System. Out. println ("consume the item:" + i

tryacquire (ARG)) { Sethead (node); P.next = null; Help GC return; } if (Shouldparkafterfailedacquire (p, node) parkandcheckinterrupt ()) break ; } } catch (RuntimeException ex) { Cancelacquire (node); Throw ex; } Arrive here only if interrupted cancelacquire (node); throw new Interruptedexception ();

Java: producer and consumer issues I remember the first time I made a java question, I saw "Writing producer and consumer problems" and thought it was related to the factory model. Now, I think it's a crash.Java producer and consumer issues are actually about multi-thread co

Package com.cn.test3; Java multithreaded simulation producer consumer issues//producerconsumer is the main class, producer producers, consumer consumers, product products//storage WarehouseComments: I wrote the output below the program, you can look at it, in fact very easy, you imagine the product from production, to take out a production line, we define two thr

1 // The standard idiom for calling the wait 2 synchronized (sharedobject) {3 while (condition) {4 sharedobject.wait (); releases lock, and reacquires on Wake up5 }6 // do action based upon condition e.g. take or put to queue 7 }Canonical code template using the wait and notify functions.The purpose of using wait in the while loop is to check whether the condition is satisfied before and after the thread is awakened, and if the condition is not changed,