英文:
Is it possible to call Java methods on a different server from Python using Py4J
问题
我正在使用py4j在Python和Java之间进行通信。
目前，Java进程和Python位于同一台服务器上。
我想知道是否可能将这两者分开到不同的服务器上，而不需要在当前使用Py4J的方法中进行太多更改。
如果可能的话，是否有人可以帮助我找到相关文档或展示代码片段来实现这一点？
英文:
I am using py4j for communication between python and java.
Currently, the java processes and python are in same server.
I would like to know is it possible to separate these two into different servers without much changes in the current approach using Py4J.
If possible, can someone help me direct to relevant documentation or show code snippets on how to do this?
答案1
得分: 0
以下是翻译好的内容：
我不知道你是否还在寻找答案，但有人可能会发现这个有用：
当你通过调用构造函数创建你的网关时，
GatewayServer gatewayServer = new GatewayServer(new YourEntryPoint(), gatewayPort);
然后你的网关将具有默认的 Java IP 地址设置为 127.0.0.1（localhost）。
IP 地址设置为 localhost 的网关只会回答来自本地主机（同一台机器）的请求。
你可以使用 IP 0.0.0.0 来使其使用你机器的所有 IP，或者指定你机器中的某个 IP。
指定 Java IP 的一种方法是使用 GatewayServer.GatewayServerBuilder。
GatewayServer.GatewayServerBuilder builder = new GatewayServer.GatewayServerBuilder();
GatewayServer gatewayServer = builder
.entryPoint(new YourEntryPoint())
.javaPort(gatewayPort)
.javaAddress(InetAddress.getByName("0.0.0.0")) // .getByName 抛出 UnknownHostException
.build();
英文:
I don't know you are still looking for answer but someone might find this helpful :
When you are creating your gateway by calling constructor,
GatewayServer gatewayServer = new GatewayServer(new YourEntryPoint(), gatewayPort);
then your gateway will have default java IP address set to 127.0.0.1 (localhost).
Gateway which has IP address set to localhost will answer only requests that come from localhost (same machine).
You can use IP 0.0.0.0 to make it use all IPs of your machine or specify one of IPs of your machine.
One way to specify Java IP is using GatewayServer.GatewayServerBuilder.
GatewayServer.GatewayServerBuilder builder = new GatewayServer.GatewayServerBuilder();
GatewayServer gatewayServer = builder
.entryPoint(new YourEntryPoint())
.javaPort(gatewayPort)
.javaAddress(InetAddress.getByName("0.0.0.0")) // .getByName throws UnknownHostException
.build();
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