/*
* 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 com.facebook.presto.discovery;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.inject.Binder;
import com.google.inject.Scopes;
import io.airlift.configuration.AbstractConfigurationAwareModule;
import io.airlift.discovery.client.ServiceDescriptor;
import io.airlift.discovery.client.ServiceInventory;
import io.airlift.discovery.client.ServiceSelector;
import io.airlift.discovery.server.DiscoveryConfig;
import io.airlift.discovery.server.DynamicAnnouncementResource;
import io.airlift.discovery.server.DynamicStore;
import io.airlift.discovery.server.ForDynamicStore;
import io.airlift.discovery.server.Id;
import io.airlift.discovery.server.ReplicatedDynamicStore;
import io.airlift.discovery.server.Service;
import io.airlift.discovery.server.ServiceResource;
import io.airlift.discovery.server.StaticStore;
import io.airlift.discovery.store.InMemoryStore;
import io.airlift.discovery.store.ReplicatedStoreModule;
import io.airlift.node.NodeInfo;
import javax.inject.Inject;
import java.util.List;
import java.util.Set;
import static com.google.common.util.concurrent.Futures.immediateFuture;
import static io.airlift.configuration.ConfigBinder.configBinder;
import static io.airlift.discovery.client.DiscoveryBinder.discoveryBinder;
import static io.airlift.jaxrs.JaxrsBinder.jaxrsBinder;
import static io.airlift.json.JsonCodecBinder.jsonCodecBinder;
import static java.util.Objects.requireNonNull;
public class EmbeddedDiscoveryModule
extends AbstractConfigurationAwareModule
{
@Override
protected void setup(Binder binder)
{
if (!buildConfigObject(EmbeddedDiscoveryConfig.class).isEnabled()) {
return;
}
configBinder(binder).bindConfig(DiscoveryConfig.class);
jaxrsBinder(binder).bind(ServiceResource.class);
discoveryBinder(binder).bindHttpAnnouncement("discovery");
jsonCodecBinder(binder).bindJsonCodec(Service.class);
jsonCodecBinder(binder).bindListJsonCodec(Service.class);
binder.bind(ServiceSelector.class).to(DiscoveryServiceSelector.class);
binder.bind(StaticStore.class).to(EmptyStaticStore.class);
jaxrsBinder(binder).bind(DynamicAnnouncementResource.class);
binder.bind(DynamicStore.class).to(ReplicatedDynamicStore.class).in(Scopes.SINGLETON);
binder.install(new ReplicatedStoreModule("dynamic", ForDynamicStore.class, InMemoryStore.class));
}
private static class DiscoveryServiceSelector
implements ServiceSelector
{
private final NodeInfo nodeInfo;
private final ServiceInventory inventory;
@Inject
public DiscoveryServiceSelector(NodeInfo nodeInfo, ServiceInventory inventory)
{
this.nodeInfo = requireNonNull(nodeInfo, "nodeInfo is null");
this.inventory = requireNonNull(inventory, "inventory is null");
}
@Override
public String getType()
{
return "discovery";
}
@Override
public String getPool()
{
return nodeInfo.getPool();
}
@Override
public List<ServiceDescriptor> selectAllServices()
{
return ImmutableList.copyOf(inventory.getServiceDescriptors(getType()));
}
@Override
public ListenableFuture<List<ServiceDescriptor>> refresh()
{
// todo modify Service inventory to be async
inventory.updateServiceInventory();
return immediateFuture(selectAllServices());
}
}
private static class EmptyStaticStore
implements StaticStore
{
@Override
public void put(Service service)
{
throw new UnsupportedOperationException();
}
@Override
public void delete(Id<Service> id)
{
throw new UnsupportedOperationException();
}
@Override
public Set<Service> getAll()
{
return ImmutableSet.of();
}
@Override
public Set<Service> get(String type)
{
return ImmutableSet.of();
}
@Override
public Set<Service> get(String type, String pool)
{
return ImmutableSet.of();
}
}
}