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package com.sun.enterprise.server.ss.provider;
import java.io.IOException;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.spi.AbstractSelectableChannel;
import java.nio.channels.spi.AbstractSelector;
import java.nio.channels.spi.SelectorProvider;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.enterprise.server.ss.spi.ASSocketFacadeUtils;
import com.sun.enterprise.server.ss.util.ASSet;
import com.sun.enterprise.server.ss.util.ASWrapperCreator;
import com.sun.logging.LogDomains;
/**
* Selector implementation of the quick appserver startup implementation.
* JDK's NIO implementation only recognises its own channel implementation.
* It doesnt accept any other implementation for select registrations.
* This implementation make sure that JDK's NIO implementation gets only
* the JDK's channels.
*/
public class ASSelector extends AbstractSelector implements ASWrapperCreator{
private static final Logger logger = LogDomains.getLogger(LogDomains.CORE_LOGGER);
private AbstractSelector sel = null;
private boolean wakenup = false;
private boolean wrapSelectionKeys = false;
private int port = 0;
ASSelector(AbstractSelector sel, SelectorProvider provider) {
super(provider);
this.sel = sel;
}
protected void implCloseSelector() throws IOException {
if ( logger.isLoggable(Level.FINER) ) {
logger.log(Level.FINER, "Selector is getting closed :" + sel);
}
sel.close();
}
protected SelectionKey register(AbstractSelectableChannel ac,
int ops, Object obj) {
try {
if (ac instanceof ASChannel) {
ASChannel asc = (ASChannel) ac;
SelectableChannel sc = asc.getActualChannel();
if (ac instanceof ASServerSocketChannel &&
ops == SelectionKey.OP_ACCEPT) {
this.port = ((ASServerSocketChannel)ac).getPortNumber();
wrapSelectionKeys = true;
}
return sc.register(sel, ops, obj);
} else {
if ( logger.isLoggable(Level.FINEST) ) {
logger.log(java.util.logging.Level.FINEST,
"In ASSelector.register channel class = "
+ ac.getClass().getName(), new Exception());
}
return ac.register(sel, ops, obj);
}
} catch (ClosedChannelException ce) {
throw new RuntimeException (ce);
}
}
public java.util.Set keys() {
if (wrapSelectionKeys &&
ASSocketFacadeUtils.getASSocketService().isServerStartingUp(port)) {
return new ASSet(sel.keys(), this);
} else {
return sel.keys();
}
}
public java.util.Set selectedKeys() {
if (wrapSelectionKeys &&
ASSocketFacadeUtils.getASSocketService().isServerStartingUp(port)) {
return new ASSet(sel.selectedKeys(), this);
} else {
return sel.selectedKeys();
}
}
public Selector wakeup() {
wakenup = true;
return sel.wakeup();
}
public int select(long l) throws IOException {
return sel.select(l);
}
public int selectNow() throws IOException {
return sel.selectNow();
}
public int select() throws IOException {
return sel.select();
}
boolean wakenUp() {
boolean result = wakenup;
wakenup = false;
return result;
}
public Object wrapIfNecessary(Object next) {
SelectionKey selKey = (SelectionKey) next;
if ((selKey.interestOps() & SelectionKey.OP_ACCEPT) != 0) {
ASServerSocketChannel channel = new ASServerSocketChannel(
(ServerSocketChannel) selKey.channel(), this.sel.provider());
SelectionKey key = new ASSelectionKey(channel, selKey, this);
key.attach(selKey.attachment());
return key;
} else {
return selKey;
}
}
public boolean equals(Object obj) {
if (obj == this.sel) return true;
if (obj instanceof Selector) {
return ((Selector) obj).equals(this.sel);
}
return false;
}
public int hashCode() {
return this.sel.hashCode();
}
public Selector getSelector() {
return sel;
}
}