ArrayBlockingQueue调度多线程demo
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package blockingqueue;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Scanner;
import java.util.concurrent.BlockingQueue;
public class SearchTask implements Runnable{
private BlockingQueue<File> queue;
private String keyword;
public SearchTask(BlockingQueue<File> queue,String keyword){
this.queue = queue;
this.keyword = keyword;
}
public void search(File file) throws IOException {
Scanner in = new Scanner(new FileInputStream(file));
int lineNumber = 0;
while(in.hasNextLine()){
lineNumber++;
String line = in.nextLine();
if(line.contains(keyword)){
System.out.printf("%s:%d:%s%n",file.getPath(),lineNumber,line);
}
}
in.close();
}
@Override
public void run() {
try{
boolean done = false;
while(!done){
File file = queue.take();
if(file == FileEnumerationTask.DUMY){
queue.put(file);
done = true;
}else{
search(file);
}
}
}catch(Exception e){
}
}
}
package blockingqueue;
import java.io.File;
public class FileEnumerationTask implements Runnable{
public static File DUMY = new File("");
private BlockingQueue<File> queue;
private File startingDirectory;
public FileEnumerationTask(BlockingQueue<File> queue,File startingDirectory){
this.queue = queue;
this.startingDirectory = startingDirectory;
}
public void enumerate(File directory) throws InterruptedException{
File[] files = directory.listFiles();
for(File file:files){
if(file.isDirectory()){
enumerate(file);
}else{
queue.put(file);
}
}
}
@Override
public void run() {
try{
enumerate(startingDirectory);
queue.put(DUMY);
}catch(Exception e){
}
}
}
package blockingqueue;
import java.io.File;
public class BlockingQueueTest {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Enter base directory(e:/nice)");
String directory = in.nextLine();
System.out.println("Enter keyword(good)");
String keyword = in.nextLine();
final int FILE_QUEUE_SIZE = 10;
final int SEARCH_THREADS = 100;
BlockingQueue<File> queue = new ArrayBlockingQueue<File>(FILE_QUEUE_SIZE);
FileEnumerationTask enumerator = new FileEnumerationTask(queue,new File(directory));
new Thread(enumerator).start();
for(int i = 1; i<= SEARCH_THREADS;i++){
new Thread(new SearchTask(queue,keyword)).start();
}
}
}
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