本文整理汇总了Java中java.nio.channels.Selector.select方法的典型用法代码示例。如果您正苦于以下问题：Java Selector.select方法的具体用法？Java Selector.select怎么用？Java Selector.select使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.nio.channels.Selector的用法示例。
在下文中一共展示了Selector.select方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: run
import java.nio.channels.Selector; //导入方法依赖的package包/类
@Override
public void run() {
final Selector tSelector = this.selector;
for (; ; ) {
try {
tSelector.select(1000L);
connect(tSelector);
Set<SelectionKey> keys = tSelector.selectedKeys();
try {
for (SelectionKey key : keys) {
Object att = key.attachment();
if (att != null && key.isValid() && key.isConnectable()) {
finishConnect(key, att);
} else {
key.cancel();
}
}
} finally {
keys.clear();
}
} catch (Exception e) {
LOGGER.info(name, e);
}
}
}
示例2: run
import java.nio.channels.Selector; //导入方法依赖的package包/类
@Override
public void run() {
final Selector tSelector = this.selector;
//轮询发现新连接请求
for (;;) {
++acceptCount;
try {
// 阻塞的，当超时，有注册的响应事件，或者被执行wakeup方法时继续
tSelector.select(1000L);
Set<SelectionKey> keys = tSelector.selectedKeys();
try {
for (SelectionKey key : keys) {
if (key.isValid() && key.isAcceptable()) {
accept();
} else {
key.cancel();
}
}
} finally {
keys.clear();
}
} catch (Exception e) {
LOGGER.warn(getName(), e);
}
}
}
示例3: run
import java.nio.channels.Selector; //导入方法依赖的package包/类
@Override
public void run() {
final Selector tSelector = this.selector;
for (; ; ) {
try {
tSelector.select(1000L);
Set<SelectionKey> keys = tSelector.selectedKeys();
try {
for (SelectionKey key : keys) {
if (key.isValid() && key.isAcceptable()) {
accept();
} else {
key.cancel();
}
}
} finally {
keys.clear();
}
} catch (Exception e) {
LOGGER.info(getName(), e);
}
}
}
示例4: main
import java.nio.channels.Selector; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
final Selector sel = Selector.open();
Runnable r = new Runnable() {
public void run() {
try {
sel.select();
} catch (IOException x) {
x.printStackTrace();
}
}
};
// start thread to block in Selector
Thread t = new Thread(r);
t.start();
// give thread time to start
Thread.sleep(1000);
// interrupt, close, and wakeup is the magic sequence to provoke the NPE
t.interrupt();
sel.close();
sel.wakeup();
}
示例5: main
import java.nio.channels.Selector; //导入方法依赖的package包/类
public static void main(String argv[]) throws Exception {
int waitTime = 4000;
Selector selector = Selector.open();
try {
selector.wakeup();
long t1 = System.currentTimeMillis();
selector.select(waitTime);
long t2 = System.currentTimeMillis();
long totalTime = t2 - t1;
if (totalTime > waitTime)
throw new RuntimeException("Test failed");
} finally {
selector.close();
}
}
示例6: main
import java.nio.channels.Selector; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
// 创建ServerSocketChannel，监听8080端口
ServerSocketChannel ssc = ServerSocketChannel.open();
ssc.socket().bind(new InetSocketAddress(8080));
// 设置为非阻塞模式
ssc.configureBlocking(false);
// 为ssc注册选择器
Selector selector = Selector.open();
ssc.register(selector, SelectionKey.OP_ACCEPT);
// 创建处理器
while (true) {
// 等待请求，每次等待阻塞3s，超过3s后线程继续向下运行，
// 如果传入0或者不传参数将一直阻塞
if (selector.select(3000) == 0) {
continue;
}
// 获取待处理的SelectionKey
Iterator<SelectionKey> keyIter = selector.selectedKeys().iterator();
while (keyIter.hasNext()) {
SelectionKey key = keyIter.next();
// 启动新线程处理SelectionKey
new Thread(new HttpHandler(key)).run();
// 处理完后，从待处理的SelectionKey迭代器中移除当前所使用的key
keyIter.remove();
}
}
}
示例7: run
import java.nio.channels.Selector; //导入方法依赖的package包/类
@Override
public void run() {
final Selector tSelector = this.selector;
for (;;) {
++connectCount;
try {
// 查看有无连接就绪 阻塞的
tSelector.select(1000L);
connect(tSelector);
Set<SelectionKey> keys = tSelector.selectedKeys();
try {
for (SelectionKey key : keys) {
Object att = key.attachment();
if (att != null && key.isValid() && key.isConnectable()) {
finishConnect(key, att);
} else {
key.cancel();
}
}
} finally {
keys.clear();
}
} catch (Exception e) {
LOGGER.warn(name, e);
}
}
}
示例8: run
import java.nio.channels.Selector; //导入方法依赖的package包/类
@Override
public void run() {
final Selector selector = this.selector;
for (;;) {
++connectCount;
try {
//查看有无连接就绪
selector.select( 1000L );
connect(selector);
Set<SelectionKey> keys = selector.selectedKeys();
try {
for (SelectionKey key: keys) {
Object att = key.attachment();
if (att != null && key.isValid() && key.isConnectable()) {
finishConnect(key, att);
} else {
key.cancel();
}
}
} finally {
keys.clear();
}
} catch (Exception e) {
LOGGER.warn(name, e);
}
}
}
示例9: main
import java.nio.channels.Selector; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
final Selector sel = Selector.open();
Runnable r = new Runnable() {
public void run() {
try {
sel.select();
} catch (IOException x) {
x.printStackTrace();
} catch (ClosedSelectorException y) {
System.err.println
("Caught expected ClosedSelectorException");
}
}
};
// start thread to block in Selector
Thread t = new Thread(r);
t.start();
// give thread time to start
Thread.sleep(1000);
// interrupt, close, and wakeup is the magic sequence to provoke the NPE
t.interrupt();
sel.close();
sel.wakeup();
}
示例10: select
import java.nio.channels.Selector; //导入方法依赖的package包/类
private void select() throws IOException {
Selector selector = this.selector;
try {
int selectCnt = 0;
long currentNanoTime = System.nanoTime();
long selectDeadLineNanos = currentNanoTime + TimeUnit.SECONDS.toNanos(1);
for (;;) {
long timeoutMillis = (selectDeadLineNanos - currentNanoTime + 500000L) / 1000000L;
if (timeoutMillis <= 0) {
if (selectCnt == 0) {
selector.selectNow();
selectCnt = 1;
}
break;
}
int selectedKeys = selector.select(timeoutMillis);
selectCnt++;
if (selectedKeys != 0) {
break;
}
if (selectCnt >= SELECTOR_AUTO_REBUILD_THRESHOLD) {
LOGGER.warn("Selector.select() returned prematurely {} times in a row; rebuilding selector.", selectCnt);
rebuildSelector();
selector = this.selector;
// 重新select,填充 selectedKeys
selector.selectNow();
selectCnt = 1;
break;
}
currentNanoTime = System.nanoTime();
}
if (selectCnt > MIN_PREMATURE_SELECTOR_RETURNS) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Selector.select() returned prematurely {} times in a row.", selectCnt - 1);
}
}
} catch (CancelledKeyException e) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug(CancelledKeyException.class.getSimpleName() + " raised by a Selector - JDK bug?", e);
}
}
}
示例11: start
import java.nio.channels.Selector; //导入方法依赖的package包/类
@SuppressWarnings("InfiniteLoopStatement")
public void start() throws Exception {
try (ServerSocketChannel serverSocketChannel = ServerSocketChannel.open()) {
serverSocketChannel.bind(new InetSocketAddress("localhost", PORT));
serverSocketChannel.configureBlocking(false); //non blocking mode
int ops = SelectionKey.OP_ACCEPT;
Selector selector = Selector.open();
serverSocketChannel.register(selector, ops, null);
logger.info("Started on port: " + PORT);
while (true) {
selector.select();//blocks
Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
while (iterator.hasNext()) {
SelectionKey key = iterator.next();
try {
if (key.isAcceptable()) {
SocketChannel client = serverSocketChannel.accept(); //non blocking accept
System.out.println("Connection Accepted: " + client.getLocalAddress());
client.configureBlocking(false);
client.register(selector, SelectionKey.OP_READ);
} else if (key.isReadable()) {
SocketChannel channel = (SocketChannel) key.channel();
ByteBuffer buffer = ByteBuffer.allocate(CAPACITY);
int read = channel.read(buffer);
if (read != -1) {
String result = new String(buffer.array()).trim();
if (!result.isEmpty())
System.out.println("Message received: " + result + " from: " + channel.getRemoteAddress());
} else {
key.cancel();
System.out.println("Connection closed, key canceled");
}
}
} catch (IOException e) {
logger.log(Level.SEVERE, e.getMessage());
} finally {
iterator.remove();
}
}
}
}
}
示例12: write
import java.nio.channels.Selector; //导入方法依赖的package包/类
public int write(ByteBuffer buf, NioChannel socket, Selector selector,
long writeTimeout, boolean block) throws IOException {
if ( SHARED && block ) {
return blockingSelector.write(buf,socket,writeTimeout);
}
SelectionKey key = null;
int written = 0;
boolean timedout = false;
int keycount = 1; //assume we can write
long time = System.currentTimeMillis(); //start the timeout timer
try {
while ( (!timedout) && buf.hasRemaining() ) {
int cnt = 0;
if ( keycount > 0 ) { //only write if we were registered for a write
cnt = socket.write(buf); //write the data
if (cnt == -1) throw new EOFException();
written += cnt;
if (cnt > 0) {
time = System.currentTimeMillis(); //reset our timeout timer
continue; //we successfully wrote, try again without a selector
}
if (cnt==0 && (!block)) break; //don't block
}
if ( selector != null ) {
//register OP_WRITE to the selector
if (key==null) key = socket.getIOChannel().register(selector, SelectionKey.OP_WRITE);
else key.interestOps(SelectionKey.OP_WRITE);
keycount = selector.select(writeTimeout);
}
if (writeTimeout > 0 && (selector == null || keycount == 0) ) timedout = (System.currentTimeMillis()-time)>=writeTimeout;
}//while
if ( timedout ) throw new SocketTimeoutException();
} finally {
if (key != null) {
key.cancel();
if (selector != null) selector.selectNow();//removes the key from this selector
}
}
return written;
}
示例13: write
import java.nio.channels.Selector; //导入方法依赖的package包/类
public int write(ByteBuffer buf, NioChannel socket, Selector selector, long writeTimeout, boolean block)
throws IOException {
if (SHARED && block) {
return blockingSelector.write(buf, socket, writeTimeout);
}
SelectionKey key = null;
int written = 0;
boolean timedout = false;
int keycount = 1; // assume we can write
long time = System.currentTimeMillis(); // start the timeout timer
try {
while ((!timedout) && buf.hasRemaining()) {
int cnt = 0;
if (keycount > 0) { // only write if we were registered for a
// write
cnt = socket.write(buf); // write the data
if (cnt == -1)
throw new EOFException();
written += cnt;
if (cnt > 0) {
time = System.currentTimeMillis(); // reset our timeout
// timer
continue; // we successfully wrote, try again without a
// selector
}
if (cnt == 0 && (!block))
break; // don't block
}
if (selector != null) {
// register OP_WRITE to the selector
if (key == null)
key = socket.getIOChannel().register(selector, SelectionKey.OP_WRITE);
else
key.interestOps(SelectionKey.OP_WRITE);
keycount = selector.select(writeTimeout);
}
if (writeTimeout > 0 && (selector == null || keycount == 0))
timedout = (System.currentTimeMillis() - time) >= writeTimeout;
} // while
if (timedout)
throw new SocketTimeoutException();
} finally {
if (key != null) {
key.cancel();
if (selector != null)
selector.selectNow();// removes the key from this selector
}
}
return written;
}
示例14: main
import java.nio.channels.Selector; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
Selector selector;
synchronized (Selector.class) {
// Selector.open() isn't thread safe
// http://bugs.sun.com/view_bug.do?bug_id=6427854
// Affects 1.6.0_29, fixed in 1.7.0_01
selector = Selector.open();
}
Member mbr = new MemberImpl("localhost", 9999, 0);
byte seq = 0;
byte[] buf = new byte[50000];
Arrays.fill(buf,seq);
int len = buf.length;
BigDecimal total = new BigDecimal((double)0);
BigDecimal bytes = new BigDecimal((double)len);
NioSender sender = new NioSender();
sender.setDestination(mbr);
sender.setDirectBuffer(true);
sender.setSelector(selector);
sender.connect();
sender.setMessage(buf);
System.out.println("Writing to 9999");
long start = 0;
double mb = 0;
boolean first = true;
int count = 0;
DecimalFormat df = new DecimalFormat("##.00");
while (count<100000) {
if (first) {
first = false;
start = System.currentTimeMillis();
}
sender.setMessage(buf);
int selectedKeys = 0;
try {
selectedKeys = selector.select(0);
} catch (Exception e) {
e.printStackTrace();
continue;
}
if (selectedKeys == 0) {
continue;
}
Iterator<SelectionKey> it = selector.selectedKeys().iterator();
while (it.hasNext()) {
SelectionKey sk = it.next();
it.remove();
try {
int readyOps = sk.readyOps();
sk.interestOps(sk.interestOps() & ~readyOps);
if (sender.process(sk, false)) {
total = total.add(bytes);
sender.reset();
seq++;
Arrays.fill(buf,seq);
sender.setMessage(buf);
mb += ( (double) len) / 1024 / 1024;
if ( ( (++count) % 10000) == 0) {
long time = System.currentTimeMillis();
double seconds = ( (double) (time - start)) / 1000;
System.out.println("Throughput " + df.format(mb / seconds) + " MB/seconds, total "+mb+" MB, total "+total+" bytes.");
}
}
} catch (Throwable t) {
t.printStackTrace();
return;
}
}
}
System.out.println("Complete, sleeping 15 seconds");
Thread.sleep(15000);
}
示例15: main
import java.nio.channels.Selector; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
Selector selector;
synchronized (Selector.class) {
// Selector.open() isn't thread safe
// http://bugs.sun.com/view_bug.do?bug_id=6427854
// Affects 1.6.0_29, fixed in 1.7.0_01
selector = Selector.open();
}
Member mbr = new MemberImpl("localhost", 9999, 0);
ChannelData data = new ChannelData();
data.setOptions(Channel.SEND_OPTIONS_BYTE_MESSAGE);
data.setAddress(mbr);
byte[] buf = new byte[8192 * 4];
data.setMessage(new XByteBuffer(buf,false));
buf = XByteBuffer.createDataPackage(data);
int len = buf.length;
BigDecimal total = new BigDecimal((double)0);
BigDecimal bytes = new BigDecimal((double)len);
NioSender sender = new NioSender();
sender.setDestination(mbr);
sender.setDirectBuffer(true);
sender.setSelector(selector);
sender.setTxBufSize(1024*1024);
sender.connect();
sender.setMessage(buf);
System.out.println("Writing to 9999");
long start = 0;
double mb = 0;
boolean first = true;
int count = 0;
DecimalFormat df = new DecimalFormat("##.00");
while (count<100000) {
if (first) {
first = false;
start = System.currentTimeMillis();
}
sender.setMessage(buf);
int selectedKeys = 0;
try {
selectedKeys = selector.select(0);
} catch (Exception e) {
e.printStackTrace();
continue;
}
if (selectedKeys == 0) {
continue;
}
Iterator<SelectionKey> it = selector.selectedKeys().iterator();
while (it.hasNext()) {
SelectionKey sk = it.next();
it.remove();
try {
int readyOps = sk.readyOps();
sk.interestOps(sk.interestOps() & ~readyOps);
if (sender.process(sk, false)) {
total = total.add(bytes);
sender.reset();
sender.setMessage(buf);
mb += ( (double) len) / 1024 / 1024;
if ( ( (++count) % 10000) == 0) {
long time = System.currentTimeMillis();
double seconds = ( (double) (time - start)) / 1000;
System.out.println("Throughput " + df.format(mb / seconds) + " MB/seconds, total "+mb+" MB, total "+total+" bytes.");
}
}
} catch (Throwable t) {
t.printStackTrace();
return;
}
}
selector.selectedKeys().clear();
}
System.out.println("Complete, sleeping 15 seconds");
Thread.sleep(15000);
}