com.spotify.styx.api.StyxConfigResource.java Source code

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Here is the source code for com.spotify.styx.api.StyxConfigResource.java

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/*-
 * -\-\-
 * Spotify Styx API Service
 * --
 * Copyright (C) 2016 Spotify AB
 * --
 * 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.spotify.styx.api;

import static com.spotify.styx.api.Api.Version.V0;
import static com.spotify.styx.api.Api.Version.V1;
import static com.spotify.styx.api.Api.Version.V2;
import static com.spotify.styx.api.Middlewares.json;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.auto.value.AutoValue;
import com.google.common.base.Throwables;
import com.spotify.apollo.Request;
import com.spotify.apollo.Response;
import com.spotify.apollo.Status;
import com.spotify.apollo.route.AsyncHandler;
import com.spotify.apollo.route.Route;
import com.spotify.styx.storage.Storage;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Stream;
import okio.ByteString;

public class StyxConfigResource {

    static final String BASE = "/config";

    private final Storage storage;

    public StyxConfigResource(Storage storage) {
        this.storage = Objects.requireNonNull(storage);
    }

    public Stream<? extends Route<? extends AsyncHandler<? extends Response<ByteString>>>> routes() {
        final List<Route<AsyncHandler<Response<ByteString>>>> routes = Arrays.asList(
                Route.with(json(), "GET", BASE, rc -> styxConfig()),
                Route.with(json(), "PATCH", BASE, rc -> patchStyxConfig(rc.request())));

        return Api.prefixRoutes(routes, V0, V1, V2);
    }

    private Response<StyxConfig> styxConfig() {
        final boolean enabled;
        try {
            enabled = storage.globalEnabled();
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }
        return Response.forPayload(StyxConfig.create(enabled));
    }

    private Response<StyxConfig> patchStyxConfig(Request request) {
        final Optional<String> enabledParameter = request.parameter("enabled");
        if (!enabledParameter.isPresent()) {
            return Response.forStatus(Status.BAD_REQUEST.withReasonPhrase("Missing 'enabled' query parameter"));
        }

        final boolean enabled = Boolean.parseBoolean(enabledParameter.get());

        try {
            storage.setGlobalEnabled(enabled);
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }

        return Response.forPayload(StyxConfig.create(enabled));
    }

    @AutoValue
    abstract static class StyxConfig {

        @JsonProperty
        public abstract boolean enabled();

        static StyxConfig create(boolean enabled) {
            return new AutoValue_StyxConfigResource_StyxConfig(enabled);
        }
    }
}