ZooKeeper RESTful

Enable ZooKeeper RESTful service：

vim  rest.properties
cd   /root/zookeeper-3.4.8/src/contrib/rest
nohup ant run &    
curl -H'Accept: application/json' http://localhost:9998/znodes/v1/                    json
curl -H'Accept: application/xml' http://localhost:9998/znodes/v1/                    xml

RESTful 用法：

#get children of the root node

1	curl http://localhost:9998/znodes/v1/?view=children

#get “/cluster1/leader” as xml (default is json)

1	curl -H'Accept: application/xml' http://localhost:9998/znodes/v1/cluster1/leader

#get the data as text

1	curl -w "\n%{http_code}\n" "http://localhost:9998/znodes/v1/cluster1/leader?dataformat=utf8"

#set a node (data.txt contains the ascii text you want to set on the node)

1	curl -T data.txt -w "\n%{http_code}\n" "http://localhost:9998/znodes/v1/cluster1/leader?dataformat=utf8"

#create a node

1	curl -d "data1" -H'Content-Type: application/octet-stream' -w "\n%{http_code}\n" "http://localhost:9998/znodes/v1/?op=create&name=cluster2&dataformat=utf8"

1	curl -d "data2" -H'Content-Type: application/octet-stream' -w "\n%{http_code}\n" "http://localhost:9998/znodes/v1/cluster2?op=create&name=leader&dataformat=utf8"

#create a new session

1	curl -d "" -H'Content-Type: application/octet-stream' -w "\n%{http_code}\n" "http://localhost:9998/sessions/v1/?op=create&expire=10"

#session heartbeat

1	curl -X "PUT" -H'Content-Type: application/octet-stream' -w "\n%{http_code}\n" "http://localhost:9998/sessions/v1/02dfdcc8-8667-4e53-a6f8-ca5c2b495a72"

#delete a session

1	curl -X "DELETE" -H'Content-Type: application/octet-stream' -w "\n%{http_code}\n" "http://localhost:9998/sessions/v1/02dfdcc8-8667-4e53-a6f8-ca5c2b495a72"

service 启动命令

RestAPI源码入门：
RestAPI 入口main函数所在文件： org.apache.zookeeper.server.jersey.RestMain

ZooKeeper Source Code 解析：
1.zkServer 脚本启动命令：

ZOOMAIN="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=$JMXLOCALONLY org.apache.zookeeper.server.quorum.QuorumPeerMain"
nohup "$JAVA" "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
        -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=7778 \                         
        -cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG" > "$_ZOO_DAEMON_OUT" 2>&1 < /dev/null &

2.zkCli 脚本启动命令：

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"$JAVA" "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
     -cp "$CLASSPATH" $CLIENT_JVMFLAGS $JVMFLAGS \
     org.apache.zookeeper.ZooKeeperMain "$@"

由上可知， ZooKeeper的server启动入口函数为 QuorumPeerMain ，而client的启动入口函数为 ZooKeeperMain。

2017-07-19