Neo4j PHP获取Wirte锁 [英] Neo4j PHP Acquire wirte lock

问题描述

陷入困境，

谁能告诉我，我怎么能通过密码获得写锁. 注意:我将使用REST API，因此我的密码将在php中使用.

Well can anyone tell me , how can i acquire write lock through cypher. Note : I will use REST APIs , So my cypher would in php.

场景:

我正在使用Neo4j REST服务器和PHP来访问它.

I am using Neo4j REST server and PHP to access it.

现在我已经创建了一个节点，例如"counter-node"，它会生成新的用户ID.逻辑是在前面的值上加1.

Now i have created a node say 'counter-node' which generates new user id. Logic is just add 1 to previous value.

现在，如果两个用户同时到来，则第一个用户在将计数器节点"值BUT更新为1之前先读取了该值，而第二个用户则读取了它.因此，反向节点"中的值与预期不符.

Now If two users are coming simultaneously then first user read 'counter-node' value BUT before it can update it to 1 , second user read it . Thus value in 'counter-node' is not as expected.

任何帮助

推荐答案

流行的 Neo4j的APOC 插件具有一系列明确的锁定过程，可以通过Cypher调用这些过程，例如call apoc.lock.nodes([nodes])

The popular APOC plugin for Neo4j has a selection of explicit Locking procedures that can be called via Cypher such as call apoc.lock.nodes([nodes])

有关详细信息，请参见 neo4j-contrib.github.io/neo4j-apoc -procedures/#_ locking

Learn more at neo4j-contrib.github.io/neo4j-apoc-procedures/#_locking

注意:据我所知，此功能在Cypher中并不存在，因此APOC可能是您最好的选择.

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