Java -class library tutorial in DISRUPTOR framework
The DISRUPTOR framework is a high -performance concurrent programming framework that can quickly perform data exchange and sharing in a multi -threaded environment.Disruptor's Java class library provides us with an effective method to handle concurrent tasks, which can greatly improve the performance and throughput of the program.
In the DISRUPTOR framework, the following core libraries are mainly used:
1. DISRUPTOR: It is used to create and configure DISRUPTOR instances, setting event processors and event publishers.
2. RingBuffer: Circle buffer for storing and transmitting event data.
3. EventProcessor: Event processor interface is used to handle events in Ringbuffer.
Below is a simple example code that demonstrates how to use the DISRUPTOR framework to implement the concurrent task:
import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.dsl.Disruptor;
import java.nio.ByteBuffer;
import java.util.concurrent.Executors;
public class DisruptorExample {
public static void main(String[] args) {
// Define the event factory
EventFactory<LongEvent> eventFactory = new LongEventFactory();
// Set the size of Ringbuffer
int bufferSize = 1024;
// Create DISRUPTOR instance
Disruptor<LongEvent> disruptor = new Disruptor<>(eventFactory, bufferSize, Executors.newCachedThreadPool());
// Set event processor
disruptor.handleEventsWith(new LongEventHandler());
// Start Disruptor
disruptor.start();
// Get Ringbuffer instance
RingBuffer<LongEvent> ringBuffer = disruptor.getRingBuffer();
// Release event
ByteBuffer byteBuffer = ByteBuffer.allocate(8);
for (long l = 0; l < 100; l++) {
byteBuffer.putLong(0, l);
ringBuffer.publishEvent((event, sequence, buffer) -> event.setValue(buffer.getLong(0)), byteBuffer);
}
}
}
// event class
class LongEvent {
private Long value;
public void setValue(Long value) {
this.value = value;
}
}
// Event factory category
class LongEventFactory implements EventFactory<LongEvent> {
@Override
public LongEvent newInstance() {
return new LongEvent();
}
}
// Event processor
class LongEventHandler implements EventHandler<LongEvent> {
@Override
public void onEvent(LongEvent event, long sequence, boolean endOfBatch) throws Exception {
System.out.println("Event: " + event.getValue());
}
}
In the above example, we can see the basic usage of the DISRUPTOR framework, including creating a DISRUPTOR instance, setting event processor, obtaining Ringbuffer instances, and publishing events.Through these simple operations, we can achieve efficient concurrent programming and improve the performance and throughput of the program.
In addition to basic use methods, the DISRUPTOR framework also provides rich configuration options and advanced features, which can be flexibly customized and expanded according to actual needs.It is hoped that this article will give readers a certain understanding of the Disrutor framework and can apply this high -performance concurrent programming framework in actual projects.
