Proxy Defaults and Overrides

Proxies are influenced by Ice configuration properties and settings. The relevant properties can be classified into two categories: defaults and overrides.

Proxy Default Properties

Default properties affect proxies that you create from strings, or that Ice creates when unmarshaling the payload of a request or response.

For example, suppose we define the following default property:

Ice.Default.EndpointSelection=Ordered

We can verify that the property has the desired affect using the following C++ code:

GreeterPrx greeter{communicator, "greeter:tcp -h localhost -p 4061"};
assert(greeter.ice_getEndpointSelection() == Ice::EndpointSelectionType::Ordered);

Proxy Override Properties

Defining an override property causes the Ice runtime to ignore any equivalent proxy option and use the override property value instead. For example, consider the following property definition:

Ice.Override.Compress=1

This property instructs the Ice runtime to use only “compressed” requests, producing the same semantics as calling ice_compress(true) on every proxy. However, the property does not alter the existing proxy, but rather directs the Ice communicator to use protocol compression for all requests.

Previous versions of Ice had many override properties. As of Ice 3.8, Ice.Override.Compress is the only override property left.

See Also

• Ice.Default.*

• Ice.Override.*