@VisibleForTesting
static ManagedChannelProvider load(ClassLoader classLoader) {
ServiceLoader<ManagedChannelProvider> providers =
ServiceLoader.load(ManagedChannelProvider.class, classLoader);
List<ManagedChannelProvider> list = new ArrayList<ManagedChannelProvider>();
for (ManagedChannelProvider current : providers) {
if (!current.isAvailable()) {
continue;
}
list.add(current);
}
if (list.isEmpty()) {
return null;
} else {
return Collections.max(
list,
new Comparator<ManagedChannelProvider>() {
@Override
public int compare(ManagedChannelProvider f1, ManagedChannelProvider f2) {
return f1.priority() - f2.priority();
}
});
}
}
public static ManagedChannelBuilder<?> forAddress(String name, int port) {
return ManagedChannelProvider.provider().builderForAddress(name, port);
}
/**
* Creates a channel with a target string, which can be either a valid {@link
* NameResolver}-compliant URI, or an authority string.
*
* <p>A {@code NameResolver}-compliant URI is an absolute hierarchical URI as defined by {@link
* java.net.URI}. Example URIs:
*
* <ul>
* <li>{@code "dns:///foo.googleapis.com:8080"}
* <li>{@code "dns:///foo.googleapis.com"}
* <li>{@code "dns:///%5B2001:db8:85a3:8d3:1319:8a2e:370:7348%5D:443"}
* <li>{@code "dns://8.8.8.8/foo.googleapis.com:8080"}
* <li>{@code "dns://8.8.8.8/foo.googleapis.com"}
* <li>{@code "zookeeper://zk.example.com:9900/example_service"}
* </ul>
*
* <p>An authority string will be converted to a {@code NameResolver}-compliant URI, which has
* {@code "dns"} as the scheme, no authority, and the original authority string as its path after
* properly escaped. Example authority strings:
*
* <ul>
* <li>{@code "localhost"}
* <li>{@code "127.0.0.1"}
* <li>{@code "localhost:8080"}
* <li>{@code "foo.googleapis.com:8080"}
* <li>{@code "127.0.0.1:8080"}
* <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]"}
* <li>{@code "[2001:db8:85a3:8d3:1319:8a2e:370:7348]:443"}
* </ul>
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1773")
public static ManagedChannelBuilder<?> forTarget(String target) {
return ManagedChannelProvider.provider().builderForTarget(target);
}