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Palantir open source project

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/*
 * (c) Copyright 2020 Palantir Technologies Inc. All rights reserved.
 *
 * 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.palantir.dialogue.core;

import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import com.google.common.util.concurrent.ListenableFuture;
import com.palantir.dialogue.Channel;
import com.palantir.dialogue.Endpoint;
import com.palantir.dialogue.Request;
import com.palantir.dialogue.Response;
import java.util.function.Function;

final class ChannelToEndpointChannel implements Channel {

    private final LoadingCache cache;

    ChannelToEndpointChannel(Function loader) {
        this.cache = Caffeine.newBuilder().weakKeys().maximumSize(10_000).build(loader::apply);
    }

    @Override
    public ListenableFuture execute(Endpoint endpoint, Request request) {
        return cache.get(endpoint).execute(endpoint, request);
    }
}