/*
* Copyright 2010 Proofpoint, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.airlift.discovery.client.testing;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import io.airlift.discovery.client.ServiceDescriptor;
import io.airlift.discovery.client.ServiceSelector;
import java.util.List;
import static io.airlift.discovery.client.ServiceSelectorConfig.DEFAULT_POOL;
import static java.util.Objects.requireNonNull;
public class StaticServiceSelector implements ServiceSelector
{
private final String type;
private final String pool;
private final List<ServiceDescriptor> serviceDescriptors;
public StaticServiceSelector(ServiceDescriptor... serviceDescriptors)
{
this(ImmutableList.copyOf(serviceDescriptors));
}
public StaticServiceSelector(Iterable<ServiceDescriptor> serviceDescriptors)
{
requireNonNull(serviceDescriptors, "serviceDescriptors is null");
ServiceDescriptor serviceDescriptor = Iterables.getFirst(serviceDescriptors, null);
if (serviceDescriptor != null) {
this.type = serviceDescriptor.getType();
this.pool = serviceDescriptor.getPool();
}
else {
this.type = "unknown";
this.pool = DEFAULT_POOL;
}
for (ServiceDescriptor descriptor : serviceDescriptors) {
Preconditions.checkArgument(descriptor.getType().equals(type));
Preconditions.checkArgument(descriptor.getPool().equals(pool));
}
this.serviceDescriptors = ImmutableList.copyOf(serviceDescriptors);
}
@Override
public String getType()
{
return type;
}
@Override
public String getPool()
{
return pool;
}
@Override
public List<ServiceDescriptor> selectAllServices()
{
return serviceDescriptors;
}
@Override
public ListenableFuture<List<ServiceDescriptor>> refresh()
{
return Futures.immediateFuture(serviceDescriptors);
}
}