昨天晚上 看了一致性hash算法 拍案叫绝
请看如下代码:
//创建链接 for ( int j = 0; j < initConn; j++ ) { SockIO socket = createSocket( servers[i] ); if ( socket == null ) { log.error( "++++ failed to create connection to: " + servers[i] + " -- only " + j + " created." ); break; } //加入socket到连接池 这里慢慢谈 addSocketToPool( availPool, servers[i], socket ); if ( log.isDebugEnabled() ) log.debug( "++++ created and added socket: " + socket.toString() + " for host " + servers[i] ); }
先创建SockIO
SockIO socket = createSocket( servers[i] );
创建socket代码如下:
protected static Socket getSocket( String host, int port, int timeout ) throws IOException { SocketChannel sock = SocketChannel.open(); sock.socket().connect( new InetSocketAddress( host, port ), timeout ); return sock.socket(); }
那如何将数据添加到可用池中呢?
如下代码:
protected void addSocketToPool( Map> pool, String host, SockIO socket ) { if ( pool.containsKey( host ) ) { Map sockets = pool.get( host ); if ( sockets != null ) { sockets.put( socket, new Long( System.currentTimeMillis() ) ); return; } } Map sockets = new IdentityHashMap (); sockets.put( socket, new Long( System.currentTimeMillis() ) ); pool.put( host, sockets ); }