ice - ZeroC Ice 连接事件

Question

当客户端与服务器连接或断开连接时，我如何在服务器端知道？

ZeroC Ice 是否为这些事件提供了一些回调函数？

最小演示：

服务器端

try(com.zeroc.Ice.Communicator communicator = com.zeroc.Ice.Util.initialize(args))
    {
        com.zeroc.Ice.ObjectAdapter adapter =
            communicator.createObjectAdapterWithEndpoints("Hello", "default -h localhost -p 10000");
        adapter.add(new HelloI(), com.zeroc.Ice.Util.stringToIdentity("hello"));
        adapter.activate();
        communicator.waitForShutdown();
    }

客户端

    try(com.zeroc.Ice.Communicator communicator = com.zeroc.Ice.Util.initialize(args))
    {
        HelloPrx hello = HelloPrx.checkedCast(communicator.stringToProxy("hello:default -h localhost -p 10000"));
        hello.sayHello();
    }

Answer 1

从服务器端，您可以检查current.con成员并注册关闭回调，如果它是之前未见过的连接，请参阅setCloseCallback

current 是com.zeroc.Ice.Current传递给所有服务方法的参数，例如在sayHello实现中你可以做

@Override
public void sayHello(int delay, com.zeroc.Ice.Current current)
{
    // Check if current.con is a new connection, you will 
    // need to keep track of that in your code.

    // Install a close callback for the connection.
    current.con.setCloseCallback(con ->
       {
            // Close callback
       });
}