com.hotels.styx.client.healthcheck.monitors.NoOriginHealthStatusMonitor Maven / Gradle / Ivy

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/**
 * Copyright (C) 2013-2017 Expedia 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 com.hotels.styx.client.healthcheck.monitors;

import com.hotels.styx.api.client.Origin;
import com.hotels.styx.client.healthcheck.OriginHealthStatusMonitor;

import java.util.Set;
import java.util.concurrent.CompletableFuture;

import static java.util.concurrent.CompletableFuture.completedFuture;

/**
 * An {@link com.hotels.styx.client.healthcheck.OriginHealthStatusMonitor} that does nothing. Using this monitor is
 * a way to disable monitoring.
 */
public class NoOriginHealthStatusMonitor implements OriginHealthStatusMonitor {
    @Override
    public CompletableFuture start() {
        return completedFuture(null);
    }

    @Override
    public CompletableFuture stop() {
        return completedFuture(null);
    }

    @Override
    public OriginHealthStatusMonitor monitor(Set origins) {
        return this;
    }

    @Override
    public OriginHealthStatusMonitor stopMonitoring(Set origins) {
        return this;
    }

    @Override
    public OriginHealthStatusMonitor addOriginStatusListener(OriginHealthStatusMonitor.Listener listener) {
        return this;
    }
}