dagger.functional.producers.cancellation.CancellationModule.java Source code

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Here is the source code for dagger.functional.producers.cancellation.CancellationModule.java

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/*
 * Copyright (C) 2018 The Dagger Authors.
 *
 * 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 dagger.functional.producers.cancellation;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.util.concurrent.ListenableFuture;
import dagger.Provides;
import dagger.producers.Producer;
import dagger.producers.ProducerModule;
import dagger.producers.Produces;
import javax.inject.Named;

@SuppressWarnings("unused") // not actually using dependencies
@ProducerModule(subcomponents = CancellationSubcomponent.class)
final class CancellationModule {

    private final ProducerTester tester;

    CancellationModule(ProducerTester tester) {
        this.tester = checkNotNull(tester);
    }

    @Produces
    @Named("leaf1")
    ListenableFuture<String> produceLeaf1() {
        return tester.start("leaf1");
    }

    @Produces
    @Named("leaf2")
    ListenableFuture<String> produceLeaf2() {
        return tester.start("leaf2");
    }

    @Produces
    @Named("leaf3")
    ListenableFuture<String> produceLeaf3() {
        return tester.start("leaf3");
    }

    @Produces
    @Named("foo")
    ListenableFuture<String> produceFoo(@Named("leaf1") String leaf1, @Named("leaf2") String leaf2) {
        return tester.start("foo");
    }

    @Produces
    @Named("bar")
    ListenableFuture<String> produceBar(@Named("leaf2") String leaf2, @Named("leaf3") String leaf3) {
        return tester.start("bar");
    }

    @Produces
    @Named("baz")
    ListenableFuture<String> produceBaz(@Named("foo") Producer<String> foo, @Named("bar") String bar) {
        ListenableFuture<String> fooFuture = foo.get();
        if (!fooFuture.isDone()) {
            assertThat(fooFuture.cancel(true)).isTrue();
            assertThat(fooFuture.isCancelled()).isTrue();
        }
        return tester.start("baz");
    }

    @Provides
    @Named("providesDep")
    static String provideProvidesDep() {
        return "providesDep";
    }

    @Produces
    @Named("qux")
    ListenableFuture<String> produceQux(@Named("baz") String baz, @Named("providesDep") String providesDep) {
        return tester.start("qux");
    }

    @Produces
    @Named("ep1")
    ListenableFuture<String> produceEntryPoint1(@Named("qux") String qux) {
        return tester.start("entryPoint1");
    }

    @Produces
    @Named("ep2")
    ListenableFuture<String> produceEntryPoint2(@Named("bar") String bar, String dependency) {
        return tester.start("entryPoint2");
    }

    @Produces
    @Named("ep3")
    static ListenableFuture<String> produceEntryPoint3(Producer<String> dependencyProducer) {
        ListenableFuture<String> dependencyFuture = dependencyProducer.get();
        assertThat(dependencyFuture.isDone()).isFalse();
        assertThat(dependencyFuture.cancel(true)).isTrue();
        assertThat(dependencyFuture.isCancelled()).isTrue();
        return dependencyFuture;
    }
}