Runtime setting of Dropwizard HTTP and admin port

DropwizardPorts.java

package omni.backend.pipeline.service.ports;

import static com.google.common.collect.Maps.immutableEntry;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;

import org.elasticsearch.common.collect.ImmutableMap;

import com.yammer.dropwizard.config.HttpConfiguration;

public class DropwizardPorts {

    private static final String ADMIN_PORT = "admin";
    private static final String HTTP_PORT = "port";
    private final ImmutableMap<String, Integer> ports;

    public DropwizardPorts(final int baseport) {
        final ImmutableMap.Builder<String, Integer> builder = ImmutableMap.builder();
        builder.put(immutableEntry(HTTP_PORT, baseport));
        builder.put(immutableEntry(ADMIN_PORT, baseport + 1));
        this.ports = builder.build();
    }

    public HttpConfiguration wrap(final HttpConfiguration original) {
        final HttpConfiguration spy = spy(original);
        when(spy.getPort()).thenReturn(this.ports.get(HTTP_PORT));
        when(spy.getAdminPort()).thenReturn(this.ports.get(ADMIN_PORT));
        return spy;
    }
}