io.trino.gateway.ha.router.HaGatewayManager Maven / Gradle / Ivy

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/*
 * 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.trino.gateway.ha.router;

import com.google.common.collect.ImmutableList;
import io.airlift.log.Logger;
import io.trino.gateway.ha.config.ProxyBackendConfiguration;
import io.trino.gateway.ha.persistence.dao.GatewayBackend;
import io.trino.gateway.ha.persistence.dao.GatewayBackendDao;
import org.jdbi.v3.core.Jdbi;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

import static java.util.Objects.requireNonNull;

public class HaGatewayManager
        implements GatewayBackendManager
{
    private static final Logger log = Logger.get(HaGatewayManager.class);

    private final GatewayBackendDao dao;

    public HaGatewayManager(Jdbi jdbi)
    {
        dao = requireNonNull(jdbi, "jdbi is null").onDemand(GatewayBackendDao.class);
    }

    @Override
    public List getAllBackends()
    {
        List proxyBackendList = dao.findAll();
        return upcast(proxyBackendList);
    }

    @Override
    public List getAllActiveBackends()
    {
        List proxyBackendList = dao.findActiveBackend();
        return upcast(proxyBackendList);
    }

    @Override
    public List getActiveAdhocBackends()
    {
        try {
            List proxyBackendList = dao.findActiveAdhocBackend();
            return upcast(proxyBackendList);
        }
        catch (Exception e) {
            log.info("Error fetching all backends: %s", e.getLocalizedMessage());
        }
        return ImmutableList.of();
    }

    @Override
    public List getActiveBackends(String routingGroup)
    {
        List proxyBackendList = dao.findActiveBackendByRoutingGroup(routingGroup);
        return upcast(proxyBackendList);
    }

    @Override
    public Optional getBackendByName(String name)
    {
        List proxyBackendList = dao.findByName(name);
        return upcast(proxyBackendList).stream().findAny();
    }

    @Override
    public void deactivateBackend(String backendName)
    {
        dao.deactivate(backendName);
    }

    @Override
    public void activateBackend(String backendName)
    {
        dao.activate(backendName);
    }

    @Override
    public ProxyBackendConfiguration addBackend(ProxyBackendConfiguration backend)
    {
        dao.create(backend.getName(), backend.getRoutingGroup(), backend.getProxyTo(), backend.getExternalUrl(), backend.isActive());
        return backend;
    }

    @Override
    public ProxyBackendConfiguration updateBackend(ProxyBackendConfiguration backend)
    {
        GatewayBackend model = dao.findFirstByName(backend.getName());
        if (model == null) {
            dao.create(backend.getName(), backend.getRoutingGroup(), backend.getProxyTo(), backend.getExternalUrl(), backend.isActive());
        }
        else {
            dao.update(backend.getName(), backend.getRoutingGroup(), backend.getProxyTo(), backend.getExternalUrl(), backend.isActive());
        }
        return backend;
    }

    public void deleteBackend(String name)
    {
        dao.deleteByName(name);
    }

    private static List upcast(List gatewayBackendList)
    {
        List proxyBackendConfigurations = new ArrayList<>();
        for (GatewayBackend model : gatewayBackendList) {
            ProxyBackendConfiguration backendConfig = new ProxyBackendConfiguration();
            backendConfig.setActive(model.active());
            backendConfig.setRoutingGroup(model.routingGroup());
            backendConfig.setProxyTo(model.backendUrl());
            backendConfig.setExternalUrl(model.externalUrl());
            backendConfig.setName(model.name());
            proxyBackendConfigurations.add(backendConfig);
        }
        return proxyBackendConfigurations;
    }
}