多线程设置模式 -- Read-Write Lock Pattern
2009-09-17 00:00:00 来源:WEB开发网测试类
Java代码
public class Main {
public static void main(String[] args) {
Data data = new Data(10);
new ReaderThread(data).start();
new ReaderThread(data).start();
new ReaderThread(data).start();
new ReaderThread(data).start();
new ReaderThread(data).start();
new ReaderThread(data).start();
new WriterThread(data, "ABCDEFGHIJKLMNOPQRSTUVWXYZ").start();
new WriterThread(data, "abcdefghijklmnopqrstuvwxyz").start();
}
}
jdk1.5新特性读写锁
Java代码
public class Data {
private final char[] buffer;
//private final ReadWriteLock lock = new ReadWriteLock();
//读写锁
private ReadWriteLock lock = new ReentrantReadWriteLock();
//生成读锁
private Lock readLock = lock.readLock();
//生成写锁
private Lock writeLock = lock.writeLock();
public Data(int size) {
this.buffer = new char[size];
for (int i = 0; i < buffer.length; i++) {
buffer[i] = '*';
}
}
public char[] read() throws InterruptedException {
readLock.lock();
try {
return doRead();
} finally {
readLock.unlock();
}
}
public void write(char c) throws InterruptedException {
writeLock.lock();
try {
doWrite(c);
} finally {
writeLock.unlock();
}
}
private char[] doRead() {
char[] newbuf = new char[buffer.length];
for (int i = 0; i < buffer.length; i++) {
newbuf[i] = buffer[i];
}
slowly();
return newbuf;
}
private void doWrite(char c) {
for (int i = 0; i < buffer.length; i++) {
buffer[i] = c;
slowly();
}
}
private void slowly() {
try {
Thread.sleep(50);
} catch (InterruptedException e) {
}
}
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