zookeeper simple demo
简单解释： 客户端将初始值加1，然后写入server。 2个客户端输出的值的顺序是一致的。 说明客户端可已感知其他客户端的处理结果。
simple explan: The client will be the initial value of 1, and then write to server. 2 client output value is consistent with the order. That the client can have the perception of other client processing results.
Conf conf = new Conf(); // /home/user/zk conf.DIR="/zookeeper";
test result.
the ZkServer log:
13:34:50,134 INFO NIOServerCnxnFactory:94 - binding to port 0.0.0.0/0.0.0.0:22801
13:34:57,623 INFO NIOServerCnxnFactory:197 - Accepted socket connection from /0:0:0:0:0:0:0:1:5466
13:34:57,632 INFO ZooKeeperServer:868 - Client attempting to establish new session at /0:0:0:0:0:0:0:1:5466
13:34:57,636 INFO FileTxnLog:199 - Creating new log file: log.1
13:34:57,759 INFO ZooKeeperServer:617 - Established session 0x14ca6f92d2b0000 with negotiated timeout 4000 for client /0:0:0:0:0:0:0:1:5466
13:35:00,357 INFO NIOServerCnxnFactory:197 - Accepted socket connection from /127.0.0.1:5474
13:35:00,360 INFO ZooKeeperServer:868 - Client attempting to establish new session at /127.0.0.1:5474
13:35:00,482 INFO ZooKeeperServer:617 - Established session 0x14ca6f92d2b0001 with negotiated timeout 4000 for client /127.0.0.1:5474
13:35:31,937 INFO PrepRequestProcessor:494 - Processed session termination for sessionid: 0x14ca6f92d2b0000
13:35:31,952 INFO NIOServerCnxn:1007 - Closed socket connection for client /0:0:0:0:0:0:0:1:5466 which had sessionid 0x14ca6f92d2b0000
13:35:34,657 INFO PrepRequestProcessor:494 - Processed session termination for sessionid: 0x14ca6f92d2b0001
13:35:34,765 INFO NIOServerCnxn:1007 - Closed socket connection for client /127.0.0.1:5474 which had sessionid 0x14ca6f92d2b0001
Zkclient1 log
0 20 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 13:35:31,946 INFO ZooKeeper:684 - Session: 0x14ca6f92d2b0000 closed
13:35:31,946 INFO ClientCnxn:512 - EventThread shut down
ZkClient2 log 20 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 13:35:34,765 INFO ZooKeeper:684 - Session: 0x14ca6f92d2b0001 closed
13:35:34,766 INFO ClientCnxn:512 - EventThread shut down
all done.