package org.infinispan.server.websocket.handlers;
import java.util.Map;
import org.infinispan.Cache;
import org.infinispan.commons.util.CollectionFactory;
import org.infinispan.server.websocket.CacheListener;
import org.infinispan.server.websocket.CacheListener.ChannelNotifyParams;
import org.infinispan.server.websocket.ChannelUtils;
import org.infinispan.server.websocket.OpHandler;
import org.infinispan.server.websocket.json.JsonObject;
import io.netty.channel.ChannelHandlerContext;
/**
* Handler for the "notify" and "unnotify" operations.
*
* @author <a href="mailto:tom.fennelly@gmail.com">tom.fennelly@gmail.com</a>
*/
public class NotifyHandler implements OpHandler {
private Map<Cache, CacheListener> listeners = CollectionFactory.makeConcurrentMap();
@Override
public void handleOp(JsonObject opPayload, Cache<Object, Object> cache, ChannelHandlerContext ctx) {
String opCode = (String) opPayload.get(OpHandler.OP_CODE);
String key = (String) opPayload.get(OpHandler.KEY);
String[] onEvents = (String[]) opPayload.get("onEvents");
CacheListener listener = listeners.get(cache);
if(key == null) {
// If key not specified... notify on all...
key = "*";
}
if(listener == null) {
synchronized (this) {
listener = listeners.get(cache);
if(listener == null) {
listener = new CacheListener();
listeners.put(cache, listener);
cache.addListener(listener);
}
}
}
String[] keyTokens = key.split(",");
for(String keyToken : keyTokens) {
ChannelNotifyParams notifyParams = new ChannelNotifyParams(ctx.channel(), keyToken, onEvents);
if(opCode.equals("notify")) {
listener.addChannel(notifyParams);
// And push the value to the channel (if it's not wildcard)...
if(!keyToken.equals("*")) {
ChannelUtils.pushCacheValue(keyToken, cache, ctx);
}
} else if(opCode.equals("unnotify")) {
listener.removeChannel(notifyParams);
}
}
}
}