io.reactivex.mantis.network.push.PushServers Maven / Gradle / Ivy

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/*
 * Copyright 2019 Netflix, 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 io.reactivex.mantis.network.push;

import io.mantisrx.common.MantisGroup;
import java.util.List;
import java.util.Map;
import rx.Observable;
import rx.functions.Action0;
import rx.functions.Action1;
import rx.functions.Func1;
import rx.functions.Func2;
import rx.observables.GroupedObservable;
import rx.subjects.PublishSubject;


public class PushServers {

    private PushServers() {}

    public static  LegacyTcpPushServer infiniteStreamLegacyTcpNested(ServerConfig config, Observable> o) {
        final PublishSubject serverSignals = PublishSubject.create();
        final String serverName = config.getName();
        Action0 onComplete = new ErrorOnComplete(serverSignals, serverName);
        Action1 onError = serverSignals::onError;

        PushTrigger trigger = ObservableTrigger.oo(serverName, o, onComplete, onError);
        return new LegacyTcpPushServer<>(trigger, config, serverSignals);
    }

    public static  LegacyTcpPushServer> infiniteStreamLegacyTcpNestedGroupedObservable(ServerConfig> config,
                                                                                                                Observable>> go,
                                                                                                                long groupExpirySeconds, final Func1 keyEncoder,
                                                                                                                HashFunction hashFunction) {
        final PublishSubject serverSignals = PublishSubject.create();
        final String serverName = config.getName();
        Action0 onComplete = new ErrorOnComplete(serverSignals, serverName);
        Action1 onError = serverSignals::onError;

        PushTrigger> trigger = ObservableTrigger.oogo(serverName, go, onComplete, onError, groupExpirySeconds,
                keyEncoder, hashFunction);
        return new LegacyTcpPushServer<>(trigger, config, serverSignals);
    }

    // NJ
    public static  LegacyTcpPushServer> infiniteStreamLegacyTcpNestedMantisGroup(ServerConfig> config,
                                                                                                          Observable>> go,
                                                                                                          long groupExpirySeconds, final Func1 keyEncoder,
                                                                                                          HashFunction hashFunction) {
        final PublishSubject serverSignals = PublishSubject.create();
        final String serverName = config.getName();
        Action0 onComplete = new ErrorOnComplete(serverSignals, serverName);
        Action1 onError = serverSignals::onError;

        PushTrigger> trigger = ObservableTrigger.oomgo(serverName, go, onComplete, onError, groupExpirySeconds,
                keyEncoder, hashFunction);
        return new LegacyTcpPushServer<>(trigger, config, serverSignals);
    }

    public static  PushServerSse infiniteStreamSse(ServerConfig config, Observable o,
                                                               Func2>, S, Void> requestPreprocessor,
                                                               Func2>, S, Void> requestPostprocessor,
                                                               final Func2>, S, Void> subscribeProcessor,
                                                               S state, boolean supportLegacyMetrics) {

        final String serverName = config.getName();
        final PublishSubject serverSignals = PublishSubject.create();
        Action0 onComplete = new ErrorOnComplete(serverSignals, serverName);
        Action1 onError = serverSignals::onError;

        PushTrigger trigger = ObservableTrigger.o(serverName, o, onComplete, onError);

        return new PushServerSse<>(trigger, config, serverSignals,
            requestPreprocessor, requestPostprocessor,
            subscribeProcessor, state, supportLegacyMetrics);
    }

    public static  PushServerSse infiniteStreamSse(ServerConfig config, Observable o) {
        return
                infiniteStreamSse(config, o, null, null, null, null, false);
    }

    private static class ErrorOnComplete implements Action0 {
        private final PublishSubject serverSignals;
        private final String serverName;

        public ErrorOnComplete(PublishSubject serverSignals, String serverName) {
            this.serverSignals = serverSignals;
            this.serverName = serverName;
        }

        @Override
        public void call() {
            serverSignals.onNext("ILLEGAL_STATE_COMPLETED");
            throw new IllegalStateException("OnComplete signal received, Server: " + serverName + " is pushing an infinite stream, should not complete");
        }
    }
}